Install and use ant

Ant is a very good OpenSource sub-project of jakarta and a java-based compilation tool. The following describes how to install ant in linux:

　　1. Download
SlaveHttp://ant.apache.org/bindownload.cgiYou can download the latest tar package: apache-ant-1.6.2.tar.gz, if it is a windows environment is a zip file, decompress, in the system environment variables set ANT_HOME to f: projectoolsapache-ant-1.6.2, and f: projectoolsapache-ant-1.6.2in directory added to classpath, then you can use

　　2./lInstall and decompress the package to/usr.Under ocal
> Tar zxpvf apache-ant-1.6.2.tar.gz
> Ln-s apache-ant-1.6.2 ant

　　3. Set the environment
Set ANT_HOME to the current user's. bash_profile file/home/admin/. bash_profile

[Admin @ tangtang home] $ su-admin
[Admin @ tangtang home] $ vi. bash_profile
Export ANT_HOME =/usr/local/ant
Export PATH =/usr/local/ant/bin: $ PATH

In windows, set % ANT_HOME % and add the full path of % ANT_HOME % in to % path %.

　　4. Test
Run the ant command to test the running status.
[Admin @ tangtang home] $ ant
Buildfile: build. xml does not exist!
Build failed

[Admin @ tangtang home] $ ant-version
Apache Ant version 1.6.2 compiled on July 16 2004

If this error occurs: Exception in thread "main" java. lang. NoClassDefFoundError: org/apache/tools/ant/launch/Launcher
In linux, ant lib is installed by default, and/etc/ant is modified. in conf, ANT_HOME =/usr/share/ant correctly installs the ant address for you, such as/usr/local/ant.

　　5. build script
In a linux environment, the following is an example of a build script:

# Build script
#! /Bin/sh
# Go to the parent directory
Cd 'dirname $0 '/..
# Obtain the current directory as PROJECT_HOME
PROJECT_HOME = 'pwd'
# Set JAVA_HOME
Export JAVA_HOME =/usr/cyber/java
# Obtain CLASSPATH
CLASSPATH1 = $ CLASSPATH
# Add CLASSPATH
CLASSPATH =$ {PROJECT_HOME} webdeskweb-INFconf: $ {PROJECT_HOME} webapps

WEB-INFclasses: $ CLASSPATH
# Ant build,-buildfileParameter, which is a custom build. xml file, $ @ is a parameter Array
/Usr/local/ant/bin/ant-buildfile $ {PROJECT_HOME}/build. xml "$ @"
# Build script ended

In a windows environment, the following is an example of the build. bat script:

# Build. bat
# Disable echo display
@ Echo off
# Set % JAVA_HOME %
If "% JAVA_HOME %" = "" set JAVA_HOME = f: oolsjava
# Set % ANT_HOME %
If "% ANT_HOME %" = "" set ANT_HOME = f: oolsant
# Setting PROJECT_HOME
Set PROJECT_HOME = % CD % ..
Set CLASSPATH_BAK = % CLASSPATH %
Set CLASSPATH =
# Execute build
% ANT_HOME % inant. bat-buildfile .. uilduild. xml % 1% 2% 3% 4% 5% 6% 7% 9

　　 6. build the configuration file
Under the $ {PROJECT_HOME}/build directory, You need to define two files: build. properties and build. xml.
The build. properties file defines some constants of build.

# Build. properties
Project = tangtang
Version = 1.1.1
# Use classic to compile, that is, use ant to compile
Build. compiler = classic
# Using jikes for compilation
# Build. compiler = jikes

Year = 2004
Debug = on
Optimize = on
Deprecation = on

OS = linux
Author = tangtang
Email = syvin_tom@hotmail.com
Url =Www.tangtang.org 
Company = tangtang.org

The build. xml file is the main configuration file for ant compilation. ant is powerful and needs to be represented by corresponding configuration items.

<?xml version="1.0" encoding="gb2312"?>

<!-- Build file for project -->

<project name="cyber" default="jar" basedir=".">
  <property file="${user.home}/.ant.properties" />
  <!-- ant build properties -->
  <property file="build.properties"/>

  <property name="build.dir"  value=".."/>
  <property name="build.src"  value="${build.dir}/webapps/WEB-INF/src/java"/>
  <property name="build.dest" value="${build.dir}/webapps/WEB-INF/classes"/>
  <property name="build.lib"  value="${build.dir}/webapps/WEB-INF/lib"/>
  <property name="build.ext"  value="./lib"/>
  <property name="build.tpl"  value="${build.dir}/webapps/WEB-INF/templates"/>
  <property name="build.encoding" value="gb2312"/>  

  <property name="src.java.dir" value="../src/java"/>
  <property name="javadoc.destdir" value="../docs/api"/>
  <property name="javadoc.link" value="http://www.tangtang.org/java/docs/api/"/>
  <property name="final.name" value="${project}-${version}"/>
  <property name="dist.root" value="${build.dir}/dist"/>
  <property name="dist.dir" value="${dist.root}/${final.name}"/>

  <path id="classpath">    
    <pathelement path="${java.class.path}/"/>
    <fileset dir="${build.lib}">    
      <include name="*.jar"/>
    </fileset>    
    <fileset dir="${build.ext}">    
      <include name="*.jar"/>
    </fileset>    
  </path>
  
  <property name="classpath" refid="classpath"/>
  <!-- =================================================================== -->
  <!-- prints the environment                                        -->
  <!-- =================================================================== -->
  <target name="env">    
    <echo message="build.compiler = ${build.compiler}"/>
    <echo message="java.home = ${java.home}"/>
    <echo message="user.home = ${user.home}"/>
    <!--echo message="java.class.path = ${java.class.path}"/-->
    <echo message="classpath = ${classpath}"/>
  </target>

  <!-- =================================================================== -->
  <!-- Prepares the build directory                                        -->
  <!-- =================================================================== -->
  <target name="prepare" depends="env">
      
    <tstamp/>
    <filter token="year" value="${year}"/>
    <filter token="version" value="${version}"/>
    <filter token="date" value="${DSTAMP}"/>            
    <!--
    <mkdir dir="${build.dir}"/>
    <mkdir dir="${build.dest}"/>
    <mkdir dir="${build.src}"/>
    -->
    <!--  chose a class thats from j2ee.