Shell执行/调用Java/Jar程序例子的实例详解

Shell执行/调用Java/Jar程序例子的实例详解

前言：

最近要写一个独立的Java程序去监控Hadoop和Oozie,通过Shell去调用.写代码到现在也4年多了,貌似就从来没在生产环境中写过一个独立的Java程序,不是部署到Tomcat就是直接丢给Hadoop.于是参考Hadoop等开源环境,自己写了一个demo,并且可以通过Ant打包生成可运行的程序.所以这里有三步:Java程序,Shell,Ant

     1.首先建立Java程序,由于是例子,所以这里很简单,只是输出传入参数的个数,

代码如下:

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脚本

Shell代码

#!/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代码

<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>

由于比较简单,这里就不多做注释,完整例子,请见附件.使用的话,只要进入你的工程,运行ant package,便会将程序打包到$YOUR_PROJECT/dist目录下.之后进入该程序运行bin/shell-java-ant  a b c d e f g,就会得到arguments length:7
这样子的输出.

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