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2011/06/30

COBOL Editor - CobTree


web site: http://ynohoo.braindog.org/CobTree/
It's a pretty good Cobol editor.

Features
. multi-window tabbed interface
. navigable tree view of division, sections, paragraphs etc.
. calculates the offsets of selected record definitions
. handle flat file editing of selected record definitions
. standalone installation (can run from a floppy disc)

Screenshot

2011/06/28

Utilize Maven 2 JasperReports Plugin to Compile jrxml Automatically

Motivation
We would like to compile jrxml automatically as we build our web application.

Mechanics
We use Maven 2 JasperReports Plugin to compiles JasperReports xml design files to Java source and .jasper serialized files.

How to do it
1. edit nig-web/pom.xml



<dependencies>
...
<dependency>
<groupId>net.sf.jasperreports</groupId>
<artifactId>jasperreports</artifactId>
<version>4.0.1</version>
</dependency>
</dependencies>


<build>
...
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jasperreports-maven-plugin</artifactId>
<version>1.0-beta-2</version>
<executions>
<execution>
<goals>
<goal>compile-reports</goal>
</goals>
<configuration>
<!-- define where is your jrxml file -->
<sourceDirectory>src\\main\\java\\gov\\fdc\\nig\\report\\templates</sourceDirectory>
<sourceFileExt>.jrxml</sourceFileExt>
<compiler>net.sf.jasperreports.compilers.JRGroovyCompiler</compiler>
<!-- define where is the jasper file will be generated -->
<outputDirectory>src\\main\\resources\\report\\jasper</outputDirectory>
</configuration>
</execution>
</executions>
<dependencies>
<!--note this must be repeated here to pick up correct xml validation -->
<dependency>
<groupId>net.sf.jasperreports</groupId>
<artifactId>jasperreports</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>1.7.5</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
2. mvn install
3. check result

Benefits
1. Automate jrxml compilation process
2. We won't forget to compile jrxml file and lead to our program read old jasper file

2011/06/22

Refactoring: Decompose Conditional

Motivation

if-else條件判斷式,一直是程式看起來很複雜的地方。當功能更複雜,條件式就會更多,判斷式就會顯得又臭又長。無論是程式的可讀性,或是可維護性,都大大的降低。另外,在測試的時候(如code coverage test),也會增加測試時間。


Mechanics
  • 將condition 的部份extract到獨立的method.
  • 將if-else的部份,extract到獨立的method.

Example

Before Refactor


 public List doPrint(String evdcCdStart, String evdcCdEnd) throws FDCDataAccessException {  
      List params = new ArrayList();  
      StringBuffer sql = new StringBuffer();  
      sql.append(" SELECT EVADE_CD, EVADE_NM FROM Nigt042 ");  
      String where = " WHERE ", and = " ";  
      if(StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd)){  
           sql.append(where).append(and).append(" EVADE_CD between ?1 and ?2 ");  
           params.add(evdcCdStart);  
           params.add(evdcCdEnd);  
           where = " ";  
           and = " AND ";  
      }else if(StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isEmpty(evdcCdEnd)){  
           sql.append(where).append(and).append(" EVADE_CD >= ?1 ");  
           params.add(evdcCdStart);  
           where = " ";  
           and = " AND ";  
      }else if(StringUtils.isEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd)){  
           sql.append(where).append(and).append(" EVADE_CD <= ?1 ");  
           params.add(evdcCdEnd);  
           where = " ";  
           and = " AND ";  
      }  
      sql.append(" ORDER BY EVADE_CD ");  
      return Nigt042Dao.queryNativeSQL(new Nigt042(), sql.toString(), params.toArray());  
 }  

從上述code snippet可以看出有三段判斷式

判斷式1: StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd)

判斷式2: StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isEmpty(evdcCdEnd)

判斷式3: StringUtils.isEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd)

為了讓if-else邏輯判斷增加可讀性,分別將此三的判斷式抽離成三個private method,並賦予有意義的名字,此三個method分別為:

before extract after extract
StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd) hasStartAndEndCode
StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isEmpty(evdcCdEnd) onlyHasStartCode
StringUtils.isEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd) onlyHasEndCode



After Refactor


 public List doPrint(String evdcCdStart, String evdcCdEnd) throws FDCDataAccessException {  
      List params = new ArrayList();  
      StringBuffer sql = new StringBuffer();  
      sql.append(" SELECT EVDC_CD, EVDC_NM FROM NIGT042 ");  
      String where = " WHERE ", and = " ";  
      if(hasStartAndEndCode(evdcCdStart, evdcCdEnd)){  
           sql.append(where).append(and).append(" EVDC_CD between ?1 and ?2 ");  
           params.add(evdcCdStart);  
           params.add(evdcCdEnd);  
           where = " ";  
           and = " AND ";  
      }else if(onlyHasStartCode(evdcCdStart, evdcCdEnd)){  
           sql.append(where).append(and).append(" EVDC_CD >= ?1 ");  
           params.add(evdcCdStart);  
           where = " ";  
           and = " AND ";  
      }else if(onlyHasEndCode(evdcCdStart, evdcCdEnd)){  
           sql.append(where).append(and).append(" EVDC_CD <= ?1 ");  
           params.add(evdcCdEnd);  
           where = " ";  
           and = " AND ";  
      }  
      sql.append(" ORDER BY EVDC_CD ");  
      return nigt042Dao.queryNativeSQL(new Nigt042(), sql.toString(), params.toArray());  
 }  
 private boolean onlyHasEndCode(String evdcCdStart, String evdcCdEnd) {  
      return StringUtils.isEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd);  
 }  
 private boolean onlyHasStartCode(String evdcCdStart, String evdcCdEnd) {  
      return StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isEmpty(evdcCdEnd);  
 }  
 private boolean hasStartAndEndCode(String evdcCdStart, String evdcCdEnd) {  
      return StringUtils.isNotEmpty(evdcCdStart) && StringUtils.isNotEmpty(evdcCdEnd);  
 }  

2011/06/20

VarArgs的應用

Varargs
varargs是JDK 1.5開始才提供的新功能,其定義如下:The varargs, or variable arguments, feature allows a developer to declare that a method can take a variable number of parameters for a given argument. The vararg must be the last argument in the formal argument list.
白話一點來說,varargs就是用來處理輸入參數數量無法預知的情形,以下是一個簡單的範例。

Scenario
為了因應客戶需求,將前端的刪除功能從單筆變成多筆,此時要從前端傳多筆資料的primary key給controller來進行資料刪除。

Class Diagram
由於多筆刪除是統一的作法,且每一個Controller都會繼承Abstract Controller,於是就把getPKList定義於AbstractController中,這樣每個controller都可以直接取用,如下圖:


Sequence Diagram
從Sequence diagram可以看出,當使用者選擇某幾筆資料,然後按下刪除按鈕,Controller會呼叫getPKList來取得從前端回傳回來的primary key,當接收到以後,再呼叫doDelete來刪除資料。


Sample Code
從以下的code snippet可以看出,getPKList有帶兩個參數,第二個參數就是varargs,由於每張table擁有的primary key的數量不一,有可能一個或一個以上,如NIGT036只有一個primary key, NIGT001則有四個
NIGT036

NIGT001



透過varargs,就可以一個method 滿足所有controller 的需求


/**
* Get primary key list
*
* @param delArray delete array
* @param keys primary keys
* @return List of String
*/
public List getPKList(final String delArray, final String...keys) {
List arr = JSONArray.fromObject(delArray);
List pkList = new ArrayList();
for (Map map : arr) {
//若有多個keys,就add多個primary key到pkLisk;若只有一個primary key,則只做一次
for(String str : keys){
pkList.add(map.get(str));
}
}
return pkList;
}


2011/06/15

net.sf.jasperreports.engine.JRException: Provider com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl not found

Problem
As I use iReport 4.0.2 to open jrxml file, but it show this error message:
javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:134)
at org.netbeans.lib.uihandler.LogRecords.scan(LogRecords.java:127)
at org.netbeans.modules.uihandler.Installer.getLogs(Installer.java:681)
at org.netbeans.modules.uihandler.Installer$Submit.(Installer.java:1317)
at org.netbeans.modules.uihandler.Installer$SubmitInteractive.(Installer.java:1771)
at org.netbeans.modules.uihandler.Installer.doDisplaySummary(Installer.java:983)
at org.netbeans.modules.uihandler.Installer.displaySummary(Installer.java:912)
at org.netbeans.modules.uihandler.Installer.displaySummary(Installer.java:920)
at org.netbeans.modules.uihandler.UIHandler.run(UIHandler.java:140)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)

Solution
Change your JAVA_HOME to standard JDK instead of IBM JDK.
WHAT THE HELL

2011/06/14

ReportWrapper Class for JasperReport Implementation

在JasperReport開發,主要會分成五個部分:
  1. Get data source: 傳入List of value object,並建立JRBeanCollectionDataSource
  2. Read Jasper File: 讀取.jasper file
  3. Generate JasperPrint: 讀取report input stream並建立JasperPrint物件
  4. Set response content type and header: 根據user要輸出的格式,指定content type and header
  5. Export Report: 根據user要輸出的格式,用相對應的API進行報表輸出


其實每份報表都不外乎這五大步驟,這邊我建立一個ReportWrapper class,如下


 package gov.fdc.nig.report;  
 import gov.fdc.nig.enumeration.ExportFormatEnum;  
 import java.io.IOException;  
 import java.io.InputStream;  
 import java.io.OutputStream;  
 import java.util.List;  
 import java.util.Map;  
 import javax.servlet.http.HttpServletResponse;  
 import net.sf.jasperreports.engine.JRDataSource;  
 import net.sf.jasperreports.engine.JRException;  
 import net.sf.jasperreports.engine.JRExporter;  
 import net.sf.jasperreports.engine.JRExporterParameter;  
 import net.sf.jasperreports.engine.JasperFillManager;  
 import net.sf.jasperreports.engine.JasperPrint;  
 import net.sf.jasperreports.engine.JasperReport;  
 import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;  
 import net.sf.jasperreports.engine.export.JRCsvExporter;  
 import net.sf.jasperreports.engine.export.JRPdfExporter;  
 import net.sf.jasperreports.engine.util.JRLoader;  
 /**  
 * Report Wrapper Class  
 *  
 * @author albert  
 *  
 */  
 public class ReportWrapper {  
      private transient JRDataSource dataSource;  
      private final static String JASPER_CLASSPATH = "..\\..\\..\\..\\report\\templates\\";  
      private transient InputStream reportStream;  
      private transient JasperPrint print;  
      /**  
      * Set report data source  
      *  
      * @param data  
      * List of value object  
      */  
      private void setDataSource(final List data) {  
           dataSource = new JRBeanCollectionDataSource(data);  
      }  
      /**  
      * Get report input stream  
      */  
      private void getReportInputStream(final String fileName) {  
           reportStream = getClass().getResourceAsStream(  
           JASPER_CLASSPATH.concat(fileName.concat(".jasper")));  
      }  
      /**  
      * generate JasperPrint  
      *  
      * @param params parameters  
      * @throws JRException  
      */  
      public void generateJasperPrint(final Map params)  
      throws JRException {  
           final JasperReport report = (JasperReport) JRLoader  
           .loadObject(reportStream);  
           print = JasperFillManager.fillReport(report, params, dataSource);  
      }  
      /**  
      * Set content type and header  
      *  
      * @param fileName is File name  
      * @param response is HttpServletResponse  
      * @param exportEnum is ExportFormatEnum  
      */  
      public void setResponse(final String fileName,  
           final HttpServletResponse response,  
           final ExportFormatEnum exportEnum) {  
           response.setCharacterEncoding("UTF-8");  
           if ("pdf".equals(exportEnum.getValue())) {  
                response.setContentType("application/pdf");  
                response.setHeader("Content-Disposition", "attachment;filename=\""  
                .concat(fileName).concat(".pdf\""));  
           } else if ("csv".equals(exportEnum.getValue())) {  
                response.setContentType("application/octet-stream;charset=UTF-8");  
                response.setHeader("Content-Disposition", "attachment;filename="  
                .concat(fileName).concat(".csv"));  
           }  
      }  
      /**  
      * Export report  
      *  
      * @param exportEnum is ExportFormatEnum  
      * @param outputStream is OutputStream  
      * @throws JRException  
      * @throws IOException  
      */  
      public void exportReport(final ExportFormatEnum exportEnum,  
      final OutputStream outputStream) throws JRException, IOException {  
           if ("pdf".equals(exportEnum.getValue())) {  
                final JRExporter pdfExporter = new JRPdfExporter();  
                pdfExporter.setParameter(JRExporterParameter.JASPER_PRINT, print);  
                pdfExporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream);  
                pdfExporter.exportReport();  
           } else if ("csv".equals(exportEnum.getValue())) {  
                // byte-order marker (BOM)  
                final byte bomByteArr[] = { (byte) 0xEF, (byte) 0xBB, (byte) 0xBF };  
                // insert BOM byte array into outputStream  
                outputStream.write(bomByteArr);  
                final JRExporter csvExporter = new JRCsvExporter();  
                csvExporter.setParameter(JRExporterParameter.JASPER_PRINT, print);  
                csvExporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream);  
                csvExporter.exportReport();  
           }  
           outputStream.flush();  
      }  
      /**  
      * do export report based on the parameters  
      *  
      * @param data is List of VO  
      * @param fileName is file name  
      * @param params is parameters  
      * @param response is HttpServletResponse  
      * @param exportEnum is ExportFormatEnum  
      * @param outputStream is OutputStream  
      * @throws JRException  
      * @throws IOException  
      */  
      public void execute(final List data, final String fileName,  
      final Map params,  
      final HttpServletResponse response,  
      final ExportFormatEnum exportEnum, final OutputStream outputStream)  
      throws JRException, IOException {  
           setDataSource(data);  
           getReportInputStream(fileName);  
           generateJasperPrint(params);  
           setResponse(fileName, response, exportEnum);  
           exportReport(exportEnum, outputStream);  
           if (reportStream != null) {  
                reportStream.close();  
           }  
      }  
 }  

未來我們在Contoller的processF7Key,只要建立ReportWrapper class,並將相對應的參數給execute method即可,請參考底下的程式片段
 /**  
 * Will be executed as user click Print button  
 *  
 * @param formBean  
 * NIG135DataBean  
 * @param session  
 * NIG135DataBean  
 * @return JSONObject  
 * @throws IllegalAccessException  
 * @throws InvocationTargetException  
 * @throws IOException  
 */  
 private @ResponseBody  
 void processF7Key(final NIG135DataBean formBean,  
 final HttpServletResponse response, final HttpSession session)  
 throws IllegalAccessException, InvocationTargetException,  
 IOException {  
      String jasperXMLFileName = "NIG135P1";  
      OutputStream outputStream = response.getOutputStream();  
      try {  
           if ("135".equals(formBean.getReportOption())) {  
                Map params = new HashMap();  
                params.put("rejectPeriod", formBean.doPrintForNIG135P1(covertToNIG135P1ReportBean(formBean));  
                if ("1".equals(formBean.getReportType())) {  
                     // export csv file  
                     if (ExportFormatEnum.CSV.getValue().equals(  
                     formBean.getExportFormat())) {  
                          new ReportWrapper().execute(data,  
                          jasperXMLFileName, params, response,  
                          ExportFormatEnum.CSV, outputStream);  
                     }  
                          // export pdf file  
                          else if (ExportFormatEnum.PDF.getValue().equals(  
                          formBean.getExportFormat())) {  
                          new ReportWrapper().execute(data,  
                          jasperXMLFileName, params, response,  
                          ExportFormatEnum.PDF, outputStream);  
                     }  
                }  
           }  
      }catch(Exception e){  
      //............  
      }  
 }  

nig.nig135w.js
 function nig135wFormF7(){  
      $("#fn").val("7");  
      $("#nig135wForm").attr("target", "_self");  
      $("#nig135wForm").attr("action", "/nig/front/NIG135W");  
      $("#nig135wForm").submit();  
 }  

Benefits
所有的報表程式,都透過這一支ReportWrapper class來處理。
我們只要專注於前端的business logic以及templates,後端如何去產生pdf, csv等格式,就交給ReportWrapper 處理就好。

How to Access .jasper file from EAR File


Problem
根據標準組所提供的讀取.jasper的方式,是將.jasper的目錄寫死,此寫法未來會有很大的問題。如:
1. 若有多位開發人員同時進行開發,大家都存放於不同的地方,會導致某人的環境可以執行,其他人卻無法執行的狀況。
2. 若開發機、測試機、正式機所放置的目錄不一樣,這樣deploy到不同的機器,又忘記手動去更改目錄,會導致在測試機可以執行,正式機卻無法執行的窘境。

為了改善上述的潛在問題,以下是解決方式:

File Structure
My ReportWrapper class is under gov.fdc.nig.report

.japser files are under resources/report


After we build our application to ear file, the file structure looks like this:


Source Code

private final static String JASPER_CLASSPATH = "..\\..\\..\\..\\report\\templates\\";
InputStream reportStream = getClass().getResourceAsStream(
JASPER_CLASSPATH.concat(fileName.concat(".jasper")));
JasperReport report = (JasperReport) JRLoader.loadObject(reportStream);
...............


Benefit
透過上述的寫法,採相對路徑的方式來讀取.jasper file,避免上述的問題

2011/06/10

How to Write CSV Files as UTF-8 for Excel

Problem
As JasperReport export CSV file with UTF-8 encoding, Microsoft Excel wasn't displaying a CSV (comma separated values) file correctly.
The screenshot is as bellows:

But it can display correctly for notepad:


Root Cause
In the absence of any charset identification, Excel must guess about a file's content encoding. Therefore, Excel uses that default to read and display CSV files.


Solution
Use the byte-order marker (BOM) to identify the CSV file as a Unicode file. So I write an byte array into OutputStream, then Excel should uses UTF-8 read and display CSV files.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
//byte-order marker (BOM)
byte b[] = {(byte)0xEF, (byte)0xBB, (byte)0xBF};
//insert BOM byte array into outputStream
outputStream.write(b);
JRExporter csvExporter = new JRCsvExporter();
csvExporter.setParameter(JRExporterParameter.JASPER_PRINT, print);
csvExporter.setParameter(JRExporterParameter.OUTPUT_STREAM, outputStream);
csvExporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, reportName.concat(".csv"));
csvExporter.setParameter(JRExporterParameter.CHARACTER_ENCODING, "UTF-8");
csvExporter.exportReport();



See....it's correct now!

利用Commons Lang API 來提升Code Coverage

Problem目前參與的專案,對於code coverage有相當嚴苛的規定(at least 80%),在進行測試的時候,發現由Eclipse產生的equals()與hashCode()此二method是無法提升到80%以上的主因,因為裡頭太多的if-else statement,如下:

@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((acsNo == null) ? 0 : acsNo.hashCode());
result = prime * result
+ ((addrHsnNm == null) ? 0 : addrHsnNm.hashCode());
result = prime * result + ((addrLin == null) ? 0 : addrLin.hashCode());
result = prime * result + ((addrMk == null) ? 0 : addrMk.hashCode());
result = prime * result
+ ((addrRoadNo == null) ? 0 : addrRoadNo.hashCode());
result = prime * result
+ ((addrTownNm == null) ? 0 : addrTownNm.hashCode());
result = prime * result
+ ((addrVillNm == null) ? 0 : addrVillNm.hashCode());
result = prime * result
+ ((admRmdDate == null) ? 0 : admRmdDate.hashCode());
result = prime * result
+ ((admRmdStus == null) ? 0 : admRmdStus.hashCode());
result = prime * result
+ ((adtSgstMk == null) ? 0 : adtSgstMk.hashCode());
result = prime * result
+ ((adtrAplTp == null) ? 0 : adtrAplTp.hashCode());
result = prime * result
+ ((adtrFnshDate == null) ? 0 : adtrFnshDate.hashCode());
result = prime * result
+ ((aplLimitYm == null) ? 0 : aplLimitYm.hashCode());
result = prime * result
+ ((arrgMtgTp == null) ? 0 : arrgMtgTp.hashCode());
result = prime * result + ((asgKey == null) ? 0 : asgKey.hashCode());
result = prime * result + ((asgMk == null) ? 0 : asgMk.hashCode());
result = prime * result + ((asst1 == null) ? 0 : asst1.hashCode());
result = prime * result + ((asst2 == null) ? 0 : asst2.hashCode());
result = prime * result + ((asst3 == null) ? 0 : asst3.hashCode());
result = prime * result
+ ((asstCdcChar1 == null) ? 0 : asstCdcChar1.hashCode());
result = prime * result
+ ((asstCdcChar2 == null) ? 0 : asstCdcChar2.hashCode());
result = prime * result
+ ((asstCdcChar3 == null) ? 0 : asstCdcChar3.hashCode());
result = prime * result
+ ((asstCdcDate1 == null) ? 0 : asstCdcDate1.hashCode());
result = prime * result
+ ((asstCdcDate2 == null) ? 0 : asstCdcDate2.hashCode());
result = prime * result
+ ((asstCdcDate3 == null) ? 0 : asstCdcDate3.hashCode());
result = prime * result
+ ((asstCdcNo1 == null) ? 0 : asstCdcNo1.hashCode());
result = prime * result
+ ((asstCdcNo2 == null) ? 0 : asstCdcNo2.hashCode());
result = prime * result
+ ((asstCdcNo3 == null) ? 0 : asstCdcNo3.hashCode());
result = prime * result + ((asstTp == null) ? 0 : asstTp.hashCode());
result = prime * result + ((authMk == null) ? 0 : authMk.hashCode());
result = prime * result
+ ((baTaxKey == null) ? 0 : baTaxKey.hashCode());
result = prime * result + ((baTaxMk == null) ? 0 : baTaxMk.hashCode());
result = prime * result + ((ban == null) ? 0 : ban.hashCode());
result = prime * result + ((behAmt == null) ? 0 : behAmt.hashCode());
result = prime * result + ((bhvAmt == null) ? 0 : bhvAmt.hashCode());
result = prime * result + ((bhvAmt1 == null) ? 0 : bhvAmt1.hashCode());
result = prime * result + ((bhvAmt2 == null) ? 0 : bhvAmt2.hashCode());
result = prime * result + ((bhvAmt3 == null) ? 0 : bhvAmt3.hashCode());
result = prime * result + ((bhvAmt4 == null) ? 0 : bhvAmt4.hashCode());
result = prime * result
+ ((bhvArtc1 == null) ? 0 : bhvArtc1.hashCode());
result = prime * result
+ ((bhvArtc2 == null) ? 0 : bhvArtc2.hashCode());
result = prime * result
+ ((bhvArtc3 == null) ? 0 : bhvArtc3.hashCode());
result = prime * result
+ ((bhvArtc4 == null) ? 0 : bhvArtc4.hashCode());
result = prime * result
+ ((billUnit == null) ? 0 : billUnit.hashCode());
result = prime * result
+ ((carryDate == null) ? 0 : carryDate.hashCode());
result = prime * result
+ ((carrySeqNo == null) ? 0 : carrySeqNo.hashCode());
result = prime * result + ((caseTp == null) ? 0 : caseTp.hashCode());
result = prime * result + ((chkUnit == null) ? 0 : chkUnit.hashCode());
result = prime * result
+ ((collUnit == null) ? 0 : collUnit.hashCode());
result = prime * result + ((cpt == null) ? 0 : cpt.hashCode());
result = prime * result
+ ((cptCdcChar == null) ? 0 : cptCdcChar.hashCode());
result = prime * result
+ ((cptCdcDate == null) ? 0 : cptCdcDate.hashCode());
result = prime * result
+ ((cptCdcNo == null) ? 0 : cptCdcNo.hashCode());
result = prime * result
+ ((createDate == null) ? 0 : createDate.hashCode());
result = prime * result
+ ((crmlArtc == null) ? 0 : crmlArtc.hashCode());
result = prime * result
+ ((crmlProcDate == null) ? 0 : crmlProcDate.hashCode());
result = prime * result
+ ((crmlStus == null) ? 0 : crmlStus.hashCode());
result = prime * result
+ ((evadeIncm == null) ? 0 : evadeIncm.hashCode());
result = prime * result
+ ((evadeTax == null) ? 0 : evadeTax.hashCode());
result = prime * result + ((evdAmt1 == null) ? 0 : evdAmt1.hashCode());
result = prime * result + ((evdAmt2 == null) ? 0 : evdAmt2.hashCode());
result = prime * result + ((evdAmt3 == null) ? 0 : evdAmt3.hashCode());
result = prime * result + ((evdAmt4 == null) ? 0 : evdAmt4.hashCode());
result = prime * result
+ ((evdArtc1 == null) ? 0 : evdArtc1.hashCode());
result = prime * result
+ ((evdArtc2 == null) ? 0 : evdArtc2.hashCode());
result = prime * result
+ ((evdArtc3 == null) ? 0 : evdArtc3.hashCode());
result = prime * result
+ ((evdArtc4 == null) ? 0 : evdArtc4.hashCode());
result = prime * result
+ ((extdReas == null) ? 0 : extdReas.hashCode());
result = prime * result + ((extdTms == null) ? 0 : extdTms.hashCode());
result = prime * result + ((fCnvtMk == null) ? 0 : fCnvtMk.hashCode());
result = prime * result
+ ((fineAmtTot == null) ? 0 : fineAmtTot.hashCode());
result = prime * result
+ ((fshAplTp == null) ? 0 : fshAplTp.hashCode());
result = prime * result + ((fshDate == null) ? 0 : fshDate.hashCode());
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((invs1 == null) ? 0 : invs1.hashCode());
result = prime * result + ((invs2 == null) ? 0 : invs2.hashCode());
result = prime * result
+ ((invsRatio1 == null) ? 0 : invsRatio1.hashCode());
result = prime * result
+ ((invsRatio2 == null) ? 0 : invsRatio2.hashCode());
result = prime * result + ((madtrCd == null) ? 0 : madtrCd.hashCode());
result = prime * result
+ ((manageCd == null) ? 0 : manageCd.hashCode());
result = prime * result + ((npnshCd == null) ? 0 : npnshCd.hashCode());
result = prime * result
+ ((npnshReas == null) ? 0 : npnshReas.hashCode());
result = prime * result + ((oAdtrCd == null) ? 0 : oAdtrCd.hashCode());
result = prime * result
+ ((oAsgDate == null) ? 0 : oAsgDate.hashCode());
result = prime * result
+ ((oShFshDate == null) ? 0 : oShFshDate.hashCode());
result = prime * result
+ ((ovpnshMk == null) ? 0 : ovpnshMk.hashCode());
result = prime * result
+ ((pnshPrMk == null) ? 0 : pnshPrMk.hashCode());
result = prime * result + ((pnshTp == null) ? 0 : pnshTp.hashCode());
result = prime * result
+ ((prstAdtrCd == null) ? 0 : prstAdtrCd.hashCode());
result = prime * result
+ ((prstAsgDate == null) ? 0 : prstAsgDate.hashCode());
result = prime * result
+ ((prstPrcdDate == null) ? 0 : prstPrcdDate.hashCode());
result = prime * result
+ ((prstPrcdStus == null) ? 0 : prstPrcdStus.hashCode());
result = prime * result
+ ((prstShFshDate == null) ? 0 : prstShFshDate.hashCode());
result = prime * result
+ ((reChkUnit == null) ? 0 : reChkUnit.hashCode());
result = prime * result + ((respIdn == null) ? 0 : respIdn.hashCode());
result = prime * result + ((respNm == null) ? 0 : respNm.hashCode());
result = prime * result + ((revoCd == null) ? 0 : revoCd.hashCode());
result = prime * result
+ ((seizeDate == null) ? 0 : seizeDate.hashCode());
result = prime * result
+ ((servArea == null) ? 0 : servArea.hashCode());
result = prime * result
+ ((subtaxCd == null) ? 0 : subtaxCd.hashCode());
result = prime * result
+ ((timeStamp == null) ? 0 : timeStamp.hashCode());
result = prime * result + ((townCd == null) ? 0 : townCd.hashCode());
result = prime * result + ((trstrCd == null) ? 0 : trstrCd.hashCode());
result = prime * result
+ ((updJdgfDate == null) ? 0 : updJdgfDate.hashCode());
result = prime * result
+ ((updJdgfStus == null) ? 0 : updJdgfStus.hashCode());
result = prime * result
+ ((updateDate == null) ? 0 : updateDate.hashCode());
result = prime * result
+ ((updateUserCd == null) ? 0 : updateUserCd.hashCode());
result = prime * result
+ ((urgtLmtDate == null) ? 0 : urgtLmtDate.hashCode());
result = prime * result
+ ((vioBDate == null) ? 0 : vioBDate.hashCode());
result = prime * result
+ ((vioEDate == null) ? 0 : vioEDate.hashCode());
result = prime * result
+ ((vioFactCd1 == null) ? 0 : vioFactCd1.hashCode());
result = prime * result
+ ((vioFactCd2 == null) ? 0 : vioFactCd2.hashCode());
result = prime * result
+ ((vioHostIdnBan == null) ? 0 : vioHostIdnBan.hashCode());
result = prime * result
+ ((vioHostNm == null) ? 0 : vioHostNm.hashCode());
result = prime * result + ((vioYr == null) ? 0 : vioYr.hashCode());
result = prime * result
+ ((ynArrgMtg == null) ? 0 : ynArrgMtg.hashCode());
result = prime * result + ((zipCd == null) ? 0 : zipCd.hashCode());
return result;
}

@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!super.equals(obj))
return false;
if (getClass() != obj.getClass())
return false;
Nigt001 other = (Nigt001) obj;
if (acsNo == null) {
if (other.acsNo != null)
return false;
} else if (!acsNo.equals(other.acsNo))
return false;
if (addrHsnNm == null) {
if (other.addrHsnNm != null)
return false;
} else if (!addrHsnNm.equals(other.addrHsnNm))
return false;
if (addrLin == null) {
if (other.addrLin != null)
return false;
} else if (!addrLin.equals(other.addrLin))
return false;
if (addrMk == null) {
if (other.addrMk != null)
return false;
} else if (!addrMk.equals(other.addrMk))
return false;
if (addrRoadNo == null) {
if (other.addrRoadNo != null)
return false;
} else if (!addrRoadNo.equals(other.addrRoadNo))
return false;
if (addrTownNm == null) {
if (other.addrTownNm != null)
return false;
} else if (!addrTownNm.equals(other.addrTownNm))
return false;
if (addrVillNm == null) {
if (other.addrVillNm != null)
return false;
} else if (!addrVillNm.equals(other.addrVillNm))
return false;
if (admRmdDate == null) {
if (other.admRmdDate != null)
return false;
} else if (!admRmdDate.equals(other.admRmdDate))
return false;
if (admRmdStus == null) {
if (other.admRmdStus != null)
return false;
} else if (!admRmdStus.equals(other.admRmdStus))
return false;
if (adtSgstMk == null) {
if (other.adtSgstMk != null)
return false;
} else if (!adtSgstMk.equals(other.adtSgstMk))
return false;
if (adtrAplTp == null) {
if (other.adtrAplTp != null)
return false;
} else if (!adtrAplTp.equals(other.adtrAplTp))
return false;
if (adtrFnshDate == null) {
if (other.adtrFnshDate != null)
return false;
} else if (!adtrFnshDate.equals(other.adtrFnshDate))
return false;
if (aplLimitYm == null) {
if (other.aplLimitYm != null)
return false;
} else if (!aplLimitYm.equals(other.aplLimitYm))
return false;
if (arrgMtgTp == null) {
if (other.arrgMtgTp != null)
return false;
} else if (!arrgMtgTp.equals(other.arrgMtgTp))
return false;
if (asgKey == null) {
if (other.asgKey != null)
return false;
} else if (!asgKey.equals(other.asgKey))
return false;
if (asgMk == null) {
if (other.asgMk != null)
return false;
} else if (!asgMk.equals(other.asgMk))
return false;
if (asst1 == null) {
if (other.asst1 != null)
return false;
} else if (!asst1.equals(other.asst1))
return false;
if (asst2 == null) {
if (other.asst2 != null)
return false;
} else if (!asst2.equals(other.asst2))
return false;
if (asst3 == null) {
if (other.asst3 != null)
return false;
} else if (!asst3.equals(other.asst3))
return false;
if (asstCdcChar1 == null) {
if (other.asstCdcChar1 != null)
return false;
} else if (!asstCdcChar1.equals(other.asstCdcChar1))
return false;
if (asstCdcChar2 == null) {
if (other.asstCdcChar2 != null)
return false;
} else if (!asstCdcChar2.equals(other.asstCdcChar2))
return false;
if (asstCdcChar3 == null) {
if (other.asstCdcChar3 != null)
return false;
} else if (!asstCdcChar3.equals(other.asstCdcChar3))
return false;
if (asstCdcDate1 == null) {
if (other.asstCdcDate1 != null)
return false;
} else if (!asstCdcDate1.equals(other.asstCdcDate1))
return false;
if (asstCdcDate2 == null) {
if (other.asstCdcDate2 != null)
return false;
} else if (!asstCdcDate2.equals(other.asstCdcDate2))
return false;
if (asstCdcDate3 == null) {
if (other.asstCdcDate3 != null)
return false;
} else if (!asstCdcDate3.equals(other.asstCdcDate3))
return false;
if (asstCdcNo1 == null) {
if (other.asstCdcNo1 != null)
return false;
} else if (!asstCdcNo1.equals(other.asstCdcNo1))
return false;
if (asstCdcNo2 == null) {
if (other.asstCdcNo2 != null)
return false;
} else if (!asstCdcNo2.equals(other.asstCdcNo2))
return false;
if (asstCdcNo3 == null) {
if (other.asstCdcNo3 != null)
return false;
} else if (!asstCdcNo3.equals(other.asstCdcNo3))
return false;
if (asstTp == null) {
if (other.asstTp != null)
return false;
} else if (!asstTp.equals(other.asstTp))
return false;
if (authMk == null) {
if (other.authMk != null)
return false;
} else if (!authMk.equals(other.authMk))
return false;
if (baTaxKey == null) {
if (other.baTaxKey != null)
return false;
} else if (!baTaxKey.equals(other.baTaxKey))
return false;
if (baTaxMk == null) {
if (other.baTaxMk != null)
return false;
} else if (!baTaxMk.equals(other.baTaxMk))
return false;
if (ban == null) {
if (other.ban != null)
return false;
} else if (!ban.equals(other.ban))
return false;
if (behAmt == null) {
if (other.behAmt != null)
return false;
} else if (!behAmt.equals(other.behAmt))
return false;
if (bhvAmt == null) {
if (other.bhvAmt != null)
return false;
} else if (!bhvAmt.equals(other.bhvAmt))
return false;
if (bhvAmt1 == null) {
if (other.bhvAmt1 != null)
return false;
} else if (!bhvAmt1.equals(other.bhvAmt1))
return false;
if (bhvAmt2 == null) {
if (other.bhvAmt2 != null)
return false;
} else if (!bhvAmt2.equals(other.bhvAmt2))
return false;
if (bhvAmt3 == null) {
if (other.bhvAmt3 != null)
return false;
} else if (!bhvAmt3.equals(other.bhvAmt3))
return false;
if (bhvAmt4 == null) {
if (other.bhvAmt4 != null)
return false;
} else if (!bhvAmt4.equals(other.bhvAmt4))
return false;
if (bhvArtc1 == null) {
if (other.bhvArtc1 != null)
return false;
} else if (!bhvArtc1.equals(other.bhvArtc1))
return false;
if (bhvArtc2 == null) {
if (other.bhvArtc2 != null)
return false;
} else if (!bhvArtc2.equals(other.bhvArtc2))
return false;
if (bhvArtc3 == null) {
if (other.bhvArtc3 != null)
return false;
} else if (!bhvArtc3.equals(other.bhvArtc3))
return false;
if (bhvArtc4 == null) {
if (other.bhvArtc4 != null)
return false;
} else if (!bhvArtc4.equals(other.bhvArtc4))
return false;
if (billUnit == null) {
if (other.billUnit != null)
return false;
} else if (!billUnit.equals(other.billUnit))
return false;
if (carryDate == null) {
if (other.carryDate != null)
return false;
} else if (!carryDate.equals(other.carryDate))
return false;
if (carrySeqNo == null) {
if (other.carrySeqNo != null)
return false;
} else if (!carrySeqNo.equals(other.carrySeqNo))
return false;
if (caseTp == null) {
if (other.caseTp != null)
return false;
} else if (!caseTp.equals(other.caseTp))
return false;
if (chkUnit == null) {
if (other.chkUnit != null)
return false;
} else if (!chkUnit.equals(other.chkUnit))
return false;
if (collUnit == null) {
if (other.collUnit != null)
return false;
} else if (!collUnit.equals(other.collUnit))
return false;
if (cpt == null) {
if (other.cpt != null)
return false;
} else if (!cpt.equals(other.cpt))
return false;
if (cptCdcChar == null) {
if (other.cptCdcChar != null)
return false;
} else if (!cptCdcChar.equals(other.cptCdcChar))
return false;
if (cptCdcDate == null) {
if (other.cptCdcDate != null)
return false;
} else if (!cptCdcDate.equals(other.cptCdcDate))
return false;
if (cptCdcNo == null) {
if (other.cptCdcNo != null)
return false;
} else if (!cptCdcNo.equals(other.cptCdcNo))
return false;
if (createDate == null) {
if (other.createDate != null)
return false;
} else if (!createDate.equals(other.createDate))
return false;
if (crmlArtc == null) {
if (other.crmlArtc != null)
return false;
} else if (!crmlArtc.equals(other.crmlArtc))
return false;
if (crmlProcDate == null) {
if (other.crmlProcDate != null)
return false;
} else if (!crmlProcDate.equals(other.crmlProcDate))
return false;
if (crmlStus == null) {
if (other.crmlStus != null)
return false;
} else if (!crmlStus.equals(other.crmlStus))
return false;
if (evadeIncm == null) {
if (other.evadeIncm != null)
return false;
} else if (!evadeIncm.equals(other.evadeIncm))
return false;
if (evadeTax == null) {
if (other.evadeTax != null)
return false;
} else if (!evadeTax.equals(other.evadeTax))
return false;
if (evdAmt1 == null) {
if (other.evdAmt1 != null)
return false;
} else if (!evdAmt1.equals(other.evdAmt1))
return false;
if (evdAmt2 == null) {
if (other.evdAmt2 != null)
return false;
} else if (!evdAmt2.equals(other.evdAmt2))
return false;
if (evdAmt3 == null) {
if (other.evdAmt3 != null)
return false;
} else if (!evdAmt3.equals(other.evdAmt3))
return false;
if (evdAmt4 == null) {
if (other.evdAmt4 != null)
return false;
} else if (!evdAmt4.equals(other.evdAmt4))
return false;
if (evdArtc1 == null) {
if (other.evdArtc1 != null)
return false;
} else if (!evdArtc1.equals(other.evdArtc1))
return false;
if (evdArtc2 == null) {
if (other.evdArtc2 != null)
return false;
} else if (!evdArtc2.equals(other.evdArtc2))
return false;
if (evdArtc3 == null) {
if (other.evdArtc3 != null)
return false;
} else if (!evdArtc3.equals(other.evdArtc3))
return false;
if (evdArtc4 == null) {
if (other.evdArtc4 != null)
return false;
} else if (!evdArtc4.equals(other.evdArtc4))
return false;
if (extdReas == null) {
if (other.extdReas != null)
return false;
} else if (!extdReas.equals(other.extdReas))
return false;
if (extdTms == null) {
if (other.extdTms != null)
return false;
} else if (!extdTms.equals(other.extdTms))
return false;
if (fCnvtMk == null) {
if (other.fCnvtMk != null)
return false;
} else if (!fCnvtMk.equals(other.fCnvtMk))
return false;
if (fineAmtTot == null) {
if (other.fineAmtTot != null)
return false;
} else if (!fineAmtTot.equals(other.fineAmtTot))
return false;
if (fshAplTp == null) {
if (other.fshAplTp != null)
return false;
} else if (!fshAplTp.equals(other.fshAplTp))
return false;
if (fshDate == null) {
if (other.fshDate != null)
return false;
} else if (!fshDate.equals(other.fshDate))
return false;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (invs1 == null) {
if (other.invs1 != null)
return false;
} else if (!invs1.equals(other.invs1))
return false;
if (invs2 == null) {
if (other.invs2 != null)
return false;
} else if (!invs2.equals(other.invs2))
return false;
if (invsRatio1 == null) {
if (other.invsRatio1 != null)
return false;
} else if (!invsRatio1.equals(other.invsRatio1))
return false;
if (invsRatio2 == null) {
if (other.invsRatio2 != null)
return false;
} else if (!invsRatio2.equals(other.invsRatio2))
return false;
if (madtrCd == null) {
if (other.madtrCd != null)
return false;
} else if (!madtrCd.equals(other.madtrCd))
return false;
if (manageCd == null) {
if (other.manageCd != null)
return false;
} else if (!manageCd.equals(other.manageCd))
return false;
if (npnshCd == null) {
if (other.npnshCd != null)
return false;
} else if (!npnshCd.equals(other.npnshCd))
return false;
if (npnshReas == null) {
if (other.npnshReas != null)
return false;
} else if (!npnshReas.equals(other.npnshReas))
return false;
if (oAdtrCd == null) {
if (other.oAdtrCd != null)
return false;
} else if (!oAdtrCd.equals(other.oAdtrCd))
return false;
if (oAsgDate == null) {
if (other.oAsgDate != null)
return false;
} else if (!oAsgDate.equals(other.oAsgDate))
return false;
if (oShFshDate == null) {
if (other.oShFshDate != null)
return false;
} else if (!oShFshDate.equals(other.oShFshDate))
return false;
if (ovpnshMk == null) {
if (other.ovpnshMk != null)
return false;
} else if (!ovpnshMk.equals(other.ovpnshMk))
return false;
if (pnshPrMk == null) {
if (other.pnshPrMk != null)
return false;
} else if (!pnshPrMk.equals(other.pnshPrMk))
return false;
if (pnshTp == null) {
if (other.pnshTp != null)
return false;
} else if (!pnshTp.equals(other.pnshTp))
return false;
if (prstAdtrCd == null) {
if (other.prstAdtrCd != null)
return false;
} else if (!prstAdtrCd.equals(other.prstAdtrCd))
return false;
if (prstAsgDate == null) {
if (other.prstAsgDate != null)
return false;
} else if (!prstAsgDate.equals(other.prstAsgDate))
return false;
if (prstPrcdDate == null) {
if (other.prstPrcdDate != null)
return false;
} else if (!prstPrcdDate.equals(other.prstPrcdDate))
return false;
if (prstPrcdStus == null) {
if (other.prstPrcdStus != null)
return false;
} else if (!prstPrcdStus.equals(other.prstPrcdStus))
return false;
if (prstShFshDate == null) {
if (other.prstShFshDate != null)
return false;
} else if (!prstShFshDate.equals(other.prstShFshDate))
return false;
if (reChkUnit == null) {
if (other.reChkUnit != null)
return false;
} else if (!reChkUnit.equals(other.reChkUnit))
return false;
if (respIdn == null) {
if (other.respIdn != null)
return false;
} else if (!respIdn.equals(other.respIdn))
return false;
if (respNm == null) {
if (other.respNm != null)
return false;
} else if (!respNm.equals(other.respNm))
return false;
if (revoCd == null) {
if (other.revoCd != null)
return false;
} else if (!revoCd.equals(other.revoCd))
return false;
if (seizeDate == null) {
if (other.seizeDate != null)
return false;
} else if (!seizeDate.equals(other.seizeDate))
return false;
if (servArea == null) {
if (other.servArea != null)
return false;
} else if (!servArea.equals(other.servArea))
return false;
if (subtaxCd == null) {
if (other.subtaxCd != null)
return false;
} else if (!subtaxCd.equals(other.subtaxCd))
return false;
if (timeStamp == null) {
if (other.timeStamp != null)
return false;
} else if (!timeStamp.equals(other.timeStamp))
return false;
if (townCd == null) {
if (other.townCd != null)
return false;
} else if (!townCd.equals(other.townCd))
return false;
if (trstrCd == null) {
if (other.trstrCd != null)
return false;
} else if (!trstrCd.equals(other.trstrCd))
return false;
if (updJdgfDate == null) {
if (other.updJdgfDate != null)
return false;
} else if (!updJdgfDate.equals(other.updJdgfDate))
return false;
if (updJdgfStus == null) {
if (other.updJdgfStus != null)
return false;
} else if (!updJdgfStus.equals(other.updJdgfStus))
return false;
if (updateDate == null) {
if (other.updateDate != null)
return false;
} else if (!updateDate.equals(other.updateDate))
return false;
if (updateUserCd == null) {
if (other.updateUserCd != null)
return false;
} else if (!updateUserCd.equals(other.updateUserCd))
return false;
if (urgtLmtDate == null) {
if (other.urgtLmtDate != null)
return false;
} else if (!urgtLmtDate.equals(other.urgtLmtDate))
return false;
if (vioBDate == null) {
if (other.vioBDate != null)
return false;
} else if (!vioBDate.equals(other.vioBDate))
return false;
if (vioEDate == null) {
if (other.vioEDate != null)
return false;
} else if (!vioEDate.equals(other.vioEDate))
return false;
if (vioFactCd1 == null) {
if (other.vioFactCd1 != null)
return false;
} else if (!vioFactCd1.equals(other.vioFactCd1))
return false;
if (vioFactCd2 == null) {
if (other.vioFactCd2 != null)
return false;
} else if (!vioFactCd2.equals(other.vioFactCd2))
return false;
if (vioHostIdnBan == null) {
if (other.vioHostIdnBan != null)
return false;
} else if (!vioHostIdnBan.equals(other.vioHostIdnBan))
return false;
if (vioHostNm == null) {
if (other.vioHostNm != null)
return false;
} else if (!vioHostNm.equals(other.vioHostNm))
return false;
if (vioYr == null) {
if (other.vioYr != null)
return false;
} else if (!vioYr.equals(other.vioYr))
return false;
if (ynArrgMtg == null) {
if (other.ynArrgMtg != null)
return false;
} else if (!ynArrgMtg.equals(other.ynArrgMtg))
return false;
if (zipCd == null) {
if (other.zipCd != null)
return false;
} else if (!zipCd.equals(other.zipCd))
return false;
return true;
}


Solution
透過Apache Commons Lang的HashCodeBuilder與EqualsBuilder來解決此問題。


Steps
1. 建立一個Domain Base Class,裡頭透過Commons Lang的API來進行實作hashCode與equals method
實作內容很簡單,如下:

package gov.fdc.nig.domain;

import org.apache.commons.lang.builder.CompareToBuilder;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;

public class DomainBase {

/*
* This class enables a good hashCode method to be built for any class.
* It follows the rules laid out in the book Effective Java by Joshua Bloch.
* Writing a good hashCode method is actually quite difficult.
* This class aims to simplify the process.
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
public int hashCode(){
return HashCodeBuilder.reflectionHashCode(this);
}

/*
* This class provides methods to build a good equals method for any class.
* It follows rules laid out in Effective Java , by Joshua Bloch.
* In particular the rule for comparing doubles, floats, and arrays can be tricky.
* Also, making sure that equals() and hashCode() are consistent can be difficult.
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object obj){
return EqualsBuilder.reflectionEquals(this, obj);
}

/*
* Assists in implementing Comparable.compareTo(Object) methods.
* It is consistent with equals(Object) and hashcode() built with EqualsBuilder and HashCodeBuilder.
*/
public int compareTo(Object obj){
return CompareToBuilder.reflectionCompare(this, obj);
}

/*
* Assists in implementing Object.toString() methods.
*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString() {
return ToStringBuilder.reflectionToString(this);
}

}

2. 原本的entity class,先繼承DomainBase,再來刪除不必要的equals, hashCode與toString method,通通交給DomainBase處理即可。class之間的關係如下:


package gov.fdc.nig.domain;

import java.sql.Timestamp;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

/**
* Nigt036 entity. @author MyEclipse Persistence Tools
*/
@Entity
@Table(name = "NIGT036", schema = "AP_TAX")
public class Nigt036 extends DomainBase implements java.io.Serializable {

/**
*
*/
private static final long serialVersionUID = 627363036088777178L;
// Fields
private String vioOrgCd;
private String vioOrgNm;
private String vioOrgShnm;
private String bureauCd;
private Timestamp timeStamp;
private String updateCd;
private String userId;
private String updateDate;

// Constructors

/** default constructor */
public Nigt036() {
}

/** minimal constructor */
public Nigt036(String vioOrgCd) {
this.vioOrgCd = vioOrgCd;
}

/** full constructor */
public Nigt036(String vioOrgCd, String bureauCd, Timestamp timeStamp,
String updateCd, String updateDate, String userId, String vioOrgNm,
String vioOrgShnm) {
super();
this.vioOrgCd = vioOrgCd;
this.bureauCd = bureauCd;
this.timeStamp = timeStamp;
this.updateCd = updateCd;
this.updateDate = updateDate;
this.userId = userId;
this.vioOrgNm = vioOrgNm;
this.vioOrgShnm = vioOrgShnm;
}

// Property accessors
@Id
@Column(name = "VIO_ORG_CD", unique = true, nullable = false, length = 4)
public String getVioOrgCd() {
return this.vioOrgCd;
}

public void setVioOrgCd(String vioOrgCd) {
this.vioOrgCd = vioOrgCd;
}

@Column(name = "VIO_ORG_NM")
public String getVioOrgNm() {
return this.vioOrgNm;
}

public void setVioOrgNm(String vioOrgNm) {
this.vioOrgNm = vioOrgNm;
}

@Column(name = "VIO_ORG_SHNM")
public String getVioOrgShnm() {
return this.vioOrgShnm;
}

public void setVioOrgShnm(String vioOrgShnm) {
this.vioOrgShnm = vioOrgShnm;
}

@Column(name = "BUREAU_CD", length = 3)
public String getBureauCd() {
return this.bureauCd;
}

public void setBureauCd(String bureauCd) {
this.bureauCd = bureauCd;
}

@Column(name = "TIME_STAMP", length = 11)
public Timestamp getTimeStamp() {
return this.timeStamp;
}

public void setTimeStamp(Timestamp timeStamp) {
this.timeStamp = timeStamp;
}

@Column(name = "UPDATE_CD", length = 2)
public String getUpdateCd() {
return this.updateCd;
}

public void setUpdateCd(String updateCd) {
this.updateCd = updateCd;
}

@Column(name = "USER_ID", length = 8)
public String getUserId() {
return this.userId;
}

public void setUserId(String userId) {
this.userId = userId;
}

@Column(name = "UPDATE_DATE", length = 7)
public String getUpdateDate() {
return this.updateDate;
}

public void setUpdateDate(String updateDate) {
this.updateDate = updateDate;
}
}


Benefits
1. 測試起來較輕鬆,且能有效提昇code coverage
2. 讓程式更加精簡、好維護
3. follow rules laid out in Effective Java , by Joshua Bloch


2011/06/04

JasperSoft Integrates iReport Into Eclipse Development Platform

Intall JasperSoft into Eclipse

1. Open Eclipse --> Help --> Eclipse Marketplace

2. Choose "Eclipse Marketplace" --> Next

3. Use "ireport" as keyword and click "Go"-->Click "Install"

4. Please be patient.

5. Click "Next"

6. Choose "I Accept...", Click "Finish"

7. Installing Software...

8. Click "Restart Now" to restart Eclipse

Open Eclipse Again
1. Open jrxml file

2. See. You can edit jrxml in eclipse, do not need to open iReport again.

how to Set JavaBean DataSource in iReport

Setup Classpath

1. iReport --> Preferences

2. Click Classpath tab --> Click "Add Folder"

3. Choose class folder --> Click "Choose"

4. Check "Reloadable" checkbox --> Click OK

Create a new report template
1. File --> New


2. Choose "Blank A4" --> Click "Open This Template"

3. Assign report name and location, Click "Next"


4. Click Finish

5. Right Click -->Edit Query

6. Choose "JavaBean DataSource"-->Assign "class name"-->Click Read Attriutes

7. Choose "selected attributes" --> Click "add selected attributes"

8. Click OK

9. Unfold "Fields", then you can see the attributes we added before will show under Fields

10. Drag "Department" field into template. Then DONE.


2011/06/02

利用enumeration type來做下拉選單

我們在開發的時候,會遇到某些下拉選單不是從資料庫抓出來的,寫死在jsp好像不太恰當,寫在property file再抓出來又有點麻煩,如下圖所示,輸出格式、法務科別、下授類別等,下拉單內容很固定、又不需要放在資料庫:


這邊我建議用Java的enumeration type來建立下拉選單。步驟如下(以法務科別為例):

1. 建立enumeration class (若下選選單有增減,只要修改enumeration即可)

package gov.fdc.nig.enumeration;

/**
* 法務科別 enumeration
*
* @author albert
*
*/
public enum LegalSectionEnum {

SECTION1("1.法務一科", "1"), SECTION2("2.法務二科", "2"), ALL("3.全部", "3");

private final String label;
private final String value;

public String getLabel() {
return label;
}

public String getValue() {
return value;
}

private LegalSectionEnum(String label, String value) {
this.label = label;
this.value = value;
}

public static void main(String args[]) {
LegalSectionEnum[] enumArr = LegalSectionEnum.values();
for (LegalSectionEnum enumeration : enumArr) {
System.out.println("label=" + enumeration.getLabel() + ", value="
+ enumeration.getValue());
}
}
}

2. 在NIGUtilsConroller增加一個method來抓取enumeration中所定義的values

/**
* 取得法務科別下拉單
*
* @param res loadDelegationUnitList
* @param session HttpSession
* @throws IOException if exception happens
*/
@RequestMapping(value = "/loadLegalSectionList", method = RequestMethod.POST)
public @ResponseBody
void loadLegalSectionList(final HttpServletResponse res, final HttpSession session)
throws IOException {
final JSONArray jsonArray = new JSONArray();

try {
final LegalSectionEnum[] enumArr = LegalSectionEnum.values();

for(LegalSectionEnum enumeration : enumArr){
Map map = new HashMap();
map.put("value", enumeration.getValue());
map.put("name", enumeration.getLabel());

jsonArray.add(map);
}
} catch (FDCDataAccessException e) {
LoggerFactory.getLogger(this.getClass()).debug(
"loadExportFormatList exception: " + e.getMessage());
}

res.setContentType(NigAccessKey.JKEY_CONTENT_TYPE);
res.getWriter().write(jsonArray.toString());
}


3. 在nig.utils.js增加一個function來取得法務科別下拉單


4. 在功能相對應的js,呼叫nig.utils.js所定義的JavaScript function


JavaScript function所定義的id,與下拉選單的id需要對應