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 { 
 
   
  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="${java.debug}" debuglevel="lines,vars,source"> 
   <classpath> 
    <fileset dir="lib"> 
     <include name="***" /> 
   </fileset> 
  </copy> 
  <copy todir="${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="***.sh" /> 
    <include name="**" /> 
   </tarfileset> 
   <tarfileset dir="${package.dir}" mode="777" prefix="${package.name}"> 
    <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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