Shell執行/調用Java/Jar程序例子的實例詳解

前言：

最近要寫一個獨立的Java程序去監控Hadoop和Oozie,通過Shell去調用.寫代碼到現在也4年多了,貌似就從來沒在生產環境中寫過一個獨立的Java程序,不是部署到Tomcat就是直接丟給Hadoop.于是參考Hadoop等開源環境,自己寫了一個demo,并且可以通過Ant打包生成可運行的程序.所以這里有三步:Java程序,Shell,Ant

     1.首先建立Java程序,由于是例子,所以這里很簡單,只是輸出傳入參數的個數,

代碼如下:

package com.guoyun.study.shell;  public class ShellJavaAnt {    /**    * @param args    */   public static void main(String[] args) {     System.out.println("arguments length:"+args.length);   }  }  

    2.Shell腳本

Shell代碼 

#!/bin/bash # PRG="${0}" while [ -h "${PRG}" ]; do  ls=`ls -ld "${PRG}"`  link=`expr "$ls" : '.*-> /(.*/)$'`  if expr "$link" : '/.*' > /dev/null; then   PRG="$link"  else   PRG=`dirname "${PRG}"`/"$link"  fi done  BASEDIR=`dirname ${PRG}` BASEDIR=`cd ${BASEDIR}/..;pwd`   if test -z ${JAVA_HOME} then   JAVA_BIN=java else   JAVA_BIN=${JAVA_HOME}/bin/java fi  CLASS_PATH=$BASEDIR/shell-run-java-by-ant-*.jar SERVICE_CLASS="com.guoyun.study.shell.ShellJavaAnt"  ${JAVA_BIN} -cp $CLASS_PATH ${SERVICE_CLASS} "${@}"  exit 0 

    3.ANT

Xml代碼 

<project name="shell-run-java-by-ant" default="release-jar" basedir=".">   <property file="build.properties" />     <property name="jar.name" value="shell-run-java-by-ant" />  <property name="version" value="0.1" />  <property name="package.name" value="${jar.name}-${version}" />   <property name="build.dir" location="build" />  <property name="build.cache.dir" location="${build.dir}/cache" />  <property name="build.lib.dir" location="${build.dir}/lib" />  <property name="javadoc.dir" location="javadoc" />  <property name="dist.dir" location="dist" />  <property name="dist.java.dir" location="${dist.jar}/java" />  <property name="package.dir" location="${dist.dir}/${package.name}" />  <property name="tar.file" location="${dist.dir}/${jar.name}-${version}.tar.gz" />    <property name="src.dir" location="src" />  <property name="java.src.dir" location="${src.dir}/java" />  <property name="test.src.dir" location="${src.dir}/test" />   <property name="classes.dir" location="${build.dir}/classes" />  <property name="lib.dir" value="${basedir}/lib"/>  <property name="script.dir" value="${basedir}/script"/>    <target name="release" description="sets properties for release builds.">     <echo message="Building in release mode..."/>     <property name="compile.mode" value="release"/>     <property name="java.debug" value="false"/>  </target>   <target name="init">   <tstamp/>   <mkdir dir="${build.dir}" />   <mkdir dir="${classes.dir}" />  </target>   <macrodef name="compile-source">   <sequential>   <javac srcdir="${java.src.dir}" destdir="${classes.dir}" debug="${java.debug}" debuglevel="lines,vars,source">    <classpath>     <fileset dir="lib">      <include name="**/*.jar"/>     </fileset>    </classpath>   </javac>   </sequential>  </macrodef>   <target name="compile" depends="init" description="compile the source">   <compile-source />  </target>     <target name="jar" depends="compile">   <delete file="${build.dir}/${jar.name}-${version}.jar"/>   <jar jarfile="${build.dir}/${jar.name}-${version}.jar">    <fileset dir="${classes.dir}"/>   </jar>  </target>     <target name="package" depends="clean, jar">   <mkdir dir="${package.dir}"/>   <mkdir dir="${package.dir}/lib"/>   <mkdir dir="${package.dir}/bin" />    <copy todir="${package.dir}/lib" includeEmptyDirs="false">    <fileset dir="${lib.dir}">     <include name="**/*" />    </fileset>   </copy>   <copy todir="${package.dir}">    <fileset file="${build.dir}/${jar.name}-${version}.jar"/>   </copy>   <copy todir="${package.dir}/" file="build.xml"/>   <copy todir="${package.dir}/bin" includeEmptyDirs="false">       <fileset dir="${basedir}/script/shell">         <include name="**/*" />       </fileset>   </copy>      <chmod file="${package.dir}/bin/*" perm="ugo+rx"/>  </target>   <target name="tar" depends="package" description="Create release tarball">   <tar compression="gzip" longfile="gnu" destfile="${tar.file}">    <tarfileset dir="${package.dir}" mode="777" prefix="${package.name}">     <exclude name="bin/*" />     <exclude name="**/*.sh" />     <include name="**" />    </tarfileset>    <tarfileset dir="${package.dir}" mode="777" prefix="${package.name}">     <include name="**/*.sh" />    </tarfileset>   </tar>   <delete dir="${package.dir}" />  </target>    <target name="javadoc" depends="compile" description="generate documentation" >   <delete dir="${javadoc.dir}" />   <javadoc destdir="${javadoc.dir}">    <fileset dir="${java.src.dir}" />    <classpath>     <fileset dir="${lib.dir}">      <include name="**/*.jar"/>     </fileset>    </classpath>   </javadoc>  </target>   <target name="release-jar" description="Build release and jar" depends="release,jar"/>   <target name="clean" description="clean up">   <delete dir="${build.dir}"/>   <delete dir="${classes.dir}" />   <delete dir="${dist.dir}"/>  </target>  </project>