ant实现JAVA程序自动增加程序的版本号
程序每编译一次，版本号就自动增加1。编译时动态生成运行时获得当前版本号的类
public class Project
{
static public String getBuildVersion() { return "0.0.28"; }
static public String getBuildNumber() {return "28";}
static public String getVersion() {return "0";}
static public String getRevision() {return "0";}
static public String getBuildDate() {return "Wed Sep 13 16:33:20 CST 2006";}
}
改写build.xml,在编译任务之前加入任务：
<target name="init" description="Use the Task" depends="compileversion" >
<taskdef name="buildVersion" classname="com.tixa.base.keywordextract.config.BuildVersion" classpath="${classes.dir}"/>
<buildVersion/>
</target>
主执行任务代码
package com.tixa.base.keywordextract.config;
/********************************************************************
* Simple class that generates a java file containing a
* build version sequence number.
*
* Version 1.0: By polugen@163.com
* Build sequence numbers are of the form:
*
* <version>.<subversion>:<buildnumber>
*
* The class generated exposes the
*
* getBuildVersion(); // the whole lot
* getBuildNumber(); // the build number
* getVersion(); // the build/product version
* getRevision(); // the build/product update/revision
* toString(); // the build/product update/revision
*
* The ant task works by keeping track of the buildnumber in a file
* stored within the /var/ant directory and incrementing it after
* creating the simple java class file.
*
*********************************************************************/
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
import java.util.*;
import java.io.*;
public class BuildVersion extends Task
{
private String version="0";
private String revision="0";
private long buildNumber = -1;
private String baseDir="src"; // The root of the source tree
private String projectName="KeyWordExtract";
private String packageName="com.tixa.base.keywordextract.config";
/*********************************************************************
* Creates the file
**********************************************************************/
public void execute() throws BuildException
{
buildNumber = getNextBuildNumber();
PrintStream out = null;
System.out.println(" [build] creating : "+getFilename());
try
{
out = new PrintStream( new FileOutputStream(getFilename()));
out.println("/***************************************************/");
out.println("// Author:Panyg AUTO GENERATED BY ANT ");
out.println("// "+projectName+" Build = "+version+"."+revision+"."+buildNumber);
out.println("// File : "+getFilename());
out.println();
if(packageName != null )
{
out.println("package "+packageName+";");
out.println();
}
out.println("import java.util.Date;");
out.println();
out.println("public class Project");
out.println("{");
out.println(" static public String getBuildVersion() { return \""+version+"."+revision+"."+buildNumber+"\"; }");
out.println(" static public String getBuildNumber() {return \""+buildNumber+"\";}");
out.println(" static public String getVersion() {return \""+version+"\";}");
out.println(" static public String getRevision() {return \""+revision+"\";}");
out.println(" static public String getBuildDate() {return \""+(new Date()).toString()+"\";}");
out.println("}");
out.println("/******************** END OF FILE ***************/");
out.println();
}
catch(Exception ex)
{
throw new BuildException(ex.getMessage());
}
finally
{
if( out != null )
{
try{ out.close(); out=null;} catch(Exception ex1){;}
}
}
}
/*********************************************************************
* generates the output file name
**********************************************************************/
File getFilename()
{
String par = null;
if( packageName == null ) return new File("Project.java");
par = packageName.replace('.','/');
par += "/Project.java";
if(baseDir!= null) par = ""+baseDir+"/"+par;
return new File(par);
}
/*********************************************************************
* Sets the product version
**********************************************************************/
public void setVersion(String msg)
{
version = msg;
}
/*********************************************************************
* Sets the product revision
**********************************************************************/
public void setReVision(String msg)
{
revision = msg;
}
/*********************************************************************
* Sets the basedir of the source tree.
**********************************************************************/
public void setBaseDir(String dir)
{
baseDir = dir;
}
/*********************************************************************
* Sets the package name
**********************************************************************/
public void setPackageName(String packageName)
{
this.packageName = packageName;
}
/*********************************************************************
* Sets the project name of the source tree.
**********************************************************************/
public void setProductName(String name)
{
projectName = name;
}
/*********************************************************************
* This function gets the next build sequence generating
* storage in "/var/ant" as appropriate and overwriting it
* afterwards.
*
* Returns -1 if cannot access file etc
**********************************************************************/
long getNextBuildNumber()
{
File theFile = new File(projectName+"_"+version+"_"+revision+".txt");
Properties prop = new Properties();
long ver = -1;
InputStream input = null;
OutputStream output = null;
try
{
// 1 - Read file
// System.out.println("\t\tReading Configuration in '"+theFile+"'");
if( theFile.exists())
{
input = new FileInputStream(theFile);
prop.load(input);
input.close();
input = null;
}
if( prop.containsKey("buildnumber"))
ver = (new Integer((String)prop.get("buildnumber"))).longValue();
else
ver = 0;
// 2 - update and re-write
prop.put("buildnumber",""+(++ver));
output = new FileOutputStream(theFile);
prop.store(output,"Build Number System for "+projectName);
output.close();
output = null;
// System.out.println("Build number = "+ver);
}
catch(Exception ex)
{
ver = -1;
}
finally
{
try
{
if( input != null ) input.close();
if( output != null ) output.close();
}
catch(Exception n){;}
}
return ver;
}
}
/*************** END OF FILE *************************************/
