使用ant生成可执行的jar包

1. a.下载ant: http://ant.apache.org/bindownload.cgi

    b.安装ant: 解压ant，路径越简单越好（这是好习惯），设置环境变量ANT_HOME，PATH里添加;%ANT_HOME%\bin

    c.打开cmd，键入ant回车，如果出现提示信息
"Buildfile: build.xml does not exist!
Build failed"
就说明安装成功了


2.  java工程目录结构：
|-src-|-  //.java源文件
|-bin-|- // .class文件
|-lib-|-  //第三方jar包
build.xml    // ant 配置文件

 

3。由于ant没有提供填写jar包里Class-Path的任务，所以需要编写自定义任务，扩展Ant ，Java代码如下：

package personal.lw.util; 

import java.io.File; 

import org.apache.tools.ant.BuildException; 
import org.apache.tools.ant.Task; 

public class AntUtil extends Task { 

    private String lib; 

    private String classPath = ""; 

    private String fileType = ".jar"; 

    // ant task 
    public void execute() throws BuildException { 
        try { 
            this.classPath(dir(lib)); 
            this.getOwningTarget().getProject().setProperty("class-path", 
                    classPath); 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 

    } 

    // 根据路径获得目录 
    private File dir(String path) throws Exception { 
        return dir(path, false); 
    } 

    private File dir(String path, boolean bCreate) throws Exception { 
        File dir = new File(path); 
        if (dir.exists()) { 
            if (!dir.isDirectory()) { 
                throw new Exception(dir.getName() + "is not a directory !"); 
            } 
        } else { 
            if (bCreate) { // 新建 
                if (!dir.mkdirs()) { 
                    throw new Exception("can not create the directory \"" 
                            + dir.getName() + "\"!"); 
                } 
            } 
        } 
        return dir; 
    } 

    // 生成classpath字符串 
    private void classPath(File dir) { 
        classPath(dir, lib); 
        classPath = classPath.trim(); 
    } 

    private void classPath(File dir, String parentPath) { 
        // 处理目录 
        if (dir.isDirectory()) { 
            File[] subs = dir.listFiles(); 
            for (int i = 0, len = subs.length; i < len; i++) { 
                if (subs[i].isFile()) { // 文件 
                    String name = subs[i].getName(); 
                    // 处理.jar文件 
                    if (name.length() > fileType.length() 
                            && fileType.equals(name.substring(name.length() 
                                    - fileType.length(), name.length()))) { 
                        classPath += parentPath + path(subs[i]) + " "; 
                        continue; 
                    } 
                } 
                if (subs[i].isDirectory()) { // 文件夹 
                    classPath(subs[i], parentPath + path(subs[i])); 
                } 
            } 

        } else { 
            // 不是目录 
            System.out.println(dir.getPath() + dir.getName() 
                    + "is not a directory !"); 
        } 
    } 

    // 文件路径 
    private String path(File f) { 
        return "/" + f.getName(); 
    } 

    // 字符串 -- > 路径 
    @SuppressWarnings("unused") 
    private String path(String path) { 
        path = path.replaceAll("\\\\", "/"); 
        if (!"/".equals(path.substring(0, 1))) { 
            path = "/" + path; 
        } 
        return path; 
    } 

    public void setLib(String lib) { 
        this.lib = lib; 
    } 

}


本文来自优快云博客，转载请标明出处：http://blog.youkuaiyun.com/liuwei_blog/archive/2008/12/20/3567292.aspx

 编译后打成jar包，拷贝到%ANT_HOME%\lib目录下，注意编译的时候需要导入ant的jar包，如果用ant打包就不需要导ant的jar包了，生成普通jar包的ant配置文件如下：

<?xml version="1.0" encoding="GB2312" standalone="no"?> 
<project basedir="." default="usage" name="hibernate"> <!-- ====此处需要修改====工程名 --> 
<!-- 工程名,没有被引用，可以不改 --> 
      <property name="project-name" value="hibernate"/> <!-- ====此处需要修改====.jar文件名 --> 
      <property name="lib" value="lib"/> <!-- lib--> 
      <property name="src" value="src"/> <!-- src--> 
      <property name="tar" value="bin"/> <!-- bin --> 
      <property name="jar-file-name" value="${project-name}.jar"/> 
      <property name="main-class" value="demo.book.controler.Test"/> <!-- ====此处需要修改====main-class--> 

      <path id="Third-Part Lib"> 
            <fileset dir="${lib}"> 
                  <include name="**/*.jar"/> 
            </fileset> 
      </path> 

      <target description="Build file usage info (default task)" name="usage"> 
            <echo message=" "/> 
            <echo message="  ${project-name} "/> 
            <echo message="-------------------------------------------------------"/> 
            <echo message="  Available Targets:"/> 
            <echo message="  compile    - Compiles the source code"/> 
            <echo message="  clean      - Delete class files and .jar file"/> 
            <echo message="  jar        - Generate an .jar for source code"/> 
            <echo message="  run        - Execute Main-Class"/> 
            <echo message="-------------------------------------------------------"/> 
      </target> 

      <target name="prepare"> 
            <mkdir dir="${tar}"/> 
      </target> 

      <target name="clean"> 
            <delete dir="${tar}"/> 
            <delete file="${jar-file-name}"/> 
      </target> 
     
    <target name="copy-res"> 
        <copy todir="${tar}"> 
            <fileset dir="${src}"> 
                <exclude name="**/*.java"/> 
            </fileset> 
        </copy> 
    </target> 

      <target depends="clean,prepare,copy-res" name="compile"> 
            <javac debug="true" deprecation="true" destdir="${tar}" failonerror="true" srcdir="${src}"> 
                  <classpath refid="Third-Part Lib"/>  
            </javac> 
      </target> 
      <!-- 
       <target name="run" depends="jar"> 
            <java jar="${jar-file-name}" fork="true" maxmemory="256m"/> 
      </target> 

      --> 
        <!-- 注意：classpath="${tar}" 一定要加上，否则会报"java.lang.NoClassDefFoundError"的错误！--> 
        <target depends="compile" name="run"> 
            <java classname="${main-class}" classpath="${tar}" fork="true" maxmemory="256m"> 
                  <classpath refid="Third-Part Lib"/>  
            </java> 
      </target> 

      <target depends="compile" name="jar"> 
            <jar basedir="${tar}" destfile="${jar-file-name}"> 
                  <manifest> 
                        <attribute name="Main-Class" value="${main-class}"/> 
                        <attribute name="Class-Path" value=""/> 
                  </manifest> 
            </jar> 
      </target> 
</project> 

 

4.生成可执行jar包的ant配置文件如下：

<?xml version="1.0" encoding="GB2312" standalone="no"?> 
<project basedir="." default="usage" name="hibernate"> <!-- ====此处需要修改====工程名 --> 
<!-- 工程名,没有被引用，可以不改 --> 
      <property name="project-name" value="hibernate"/> <!-- ====此处需要修改====.jar文件名 --> 
      <property name="lib" value="lib"/> <!-- lib--> 
      <property name="src" value="src"/> <!-- src--> 
      <property name="tar" value="bin"/> <!-- bin --> 
      <property name="jar-file-name" value="${project-name}.jar"/> 
      <property name="main-class" value="demo.book.controler.Test"/> <!-- ====此处需要修改====main-class--> 

      <path id="Third-Part Lib"> 
            <fileset dir="${lib}"> 
                  <include name="**/*.jar"/> 
            </fileset> 
      </path> 

      <target description="Build file usage info (default task)" name="usage"> 
            <echo message=" "/> 
            <echo message="  ${project-name} "/> 
            <echo message="-------------------------------------------------------"/> 
            <echo message="  Available Targets:"/> 
            <echo message="  compile    - Compiles the source code"/> 
            <echo message="  clean      - Delete class files and .jar file"/> 
            <echo message="  jar        - Generate an .jar for source code"/> 
            <echo message="  run        - Execute Main-Class"/> 
            <echo message="-------------------------------------------------------"/> 
      </target> 

      <target name="prepare"> 
            <mkdir dir="${tar}"/> 
      </target> 

      <target name="clean"> 
            <delete dir="${tar}"/> 
            <delete file="${jar-file-name}"/> 
      </target> 
     
    <target name="copy-res"> 
        <copy todir="${tar}"> 
            <fileset dir="${src}"> 
                <exclude name="**/*.java"/> 
            </fileset> 
        </copy> 
    </target> 

      <target depends="clean,prepare,copy-res" name="compile"> 
            <javac debug="true" deprecation="true" destdir="${tar}" failonerror="true" srcdir="${src}"> 
                  <classpath refid="Third-Part Lib"/>  
            </javac> 
      </target> 
      <!-- 
       <target name="run" depends="jar"> 
            <java jar="${jar-file-name}" fork="true" maxmemory="256m"/> 
      </target> 

      --> 
        <!-- 注意：classpath="${tar}" 一定要加上，否则会报"java.lang.NoClassDefFoundError"的错误！--> 
        <target depends="compile" name="run"> 
            <java classname="${main-class}" classpath="${tar}" fork="true" maxmemory="256m"> 
                  <classpath refid="Third-Part Lib"/>  
            </java> 
      </target> 
      <!-- 自定义任务，创建并赋值变量class-path --> 
      <taskdef name="jarcp" classname="personal.lw.util.AntUtil"/> 
      <target name="class-path"> 
        <jarcp lib="${lib}"/> 
      </target> 

      <target depends="compile,class-path" name="jar"> 
            <jar basedir="${tar}" destfile="${jar-file-name}"> 
                  <manifest> 
                        <attribute name="Main-Class" value="${main-class}"/> 
                        <attribute name="Class-Path" value="${class-path}"/> 
                  </manifest> 
            </jar> 
      </target> 
</project> 

 

只比上一个多了一个自定义任务。

 

(完) ^_^