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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