java编译脚本的进阶之路

从零开始

因为工作的原因，需要用java写个简单的测试程序，平时自己工作主要是python，如果因为这去搭建一个eclipse的开发环境总觉得有点小题大作，于是就在配置完jdk的开发环境后，写了下面的一个脚本。

目录结构

• build.sh
• lib/
  
  • *.jar(库文件)
• test.java

其中build.sh为编译脚本，lib/路径下面放置的是依赖的第三方提供的jar包文件，test.java即为需要编译的java文件了。
下面贴下我的build.sh脚本的写法，很简单，略带幼稚，望大家轻拍
build.sh

#!/bin/shMYCLASS=for file in lib/*    do        MYCLASS=$MYCLASS:$file    doneexport CLASSPATH=$CLASSPATH:$MYCLASSjavac -Xlint *.java

初登正途

又因为机缘巧合，我要用java写一个简单的http服务(好吧，就当时开了一门副业)，上面的脚本显然需要改动了。再贴下新的目录结构吧

• build.sh
• clear.sh
• deploy.sh
• lib/
  
  • *.jar
• src/
• resourse/
• WebContent/
  
  • WEB-INF/

在WEB-INF目录下是classes路径和和web.xml文件，写过servlet的兄弟对这个应该不会陌生。
src路径下就是我们需要编译的java文件，一种简单的组织形式就是跟eclipse那样，按照包名的路径去组织
比如我下面这两个个servlet程序
Log4JTestServlet.java

package com.firstserver.server;import java.io.IOException;  import javax.servlet.ServletConfig;  import javax.servlet.ServletException;  import javax.servlet.annotation.WebServlet;  import javax.servlet.http.HttpServlet;  import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;  import org.apache.log4j.Logger;  /**  * Servlet implementation class Log4JTestServlet  */public class Log4JTestServlet extends HttpServlet {      private static final long serialVersionUID = 1L;      private static Logger logger = Logger.getLogger(Log4JTestServlet.class);        /**      * @see HttpServlet#HttpServlet()      */      public Log4JTestServlet() {          super();          // TODO Auto-generated constructor stub      }      /**      * @see Servlet#init(ServletConfig)      */      public void init(ServletConfig config) throws ServletException {          // TODO Auto-generated method stub      }      /**      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)      */      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {          // 记录debug级别的信息            logger.debug("This is debug message.");            // 记录info级别的信息            logger.info("This is info message.");            // 记录error级别的信息            logger.error("This is error message.");        }

Log4JInitServlet.java

package com.firstserver.server;import java.io.File;  import java.io.IOException;  import javax.servlet.ServletConfig;  import javax.servlet.ServletContext;  import javax.servlet.ServletException;  import javax.servlet.annotation.WebServlet;  import javax.servlet.http.HttpServlet;  import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;  import org.apache.log4j.BasicConfigurator;  import org.apache.log4j.PropertyConfigurator;  /**  * Servlet implementation class Log4JInitServlet  */  public class Log4JInitServlet extends HttpServlet {      private static final long serialVersionUID = 1L;      /**      * @see HttpServlet#HttpServlet()      */      public Log4JInitServlet() {          super();          // TODO Auto-generated constructor stub      }      /**      * @see Servlet#init(ServletConfig)      */      public void init(ServletConfig config) throws ServletException {          System.out.println("Log4JInitServlet 正在初始化 log4j日志设置信息");          String log4jLocation = config.getInitParameter("log4j-properties-location");          ServletContext sc = config.getServletContext();          if (log4jLocation == null) {              System.err.println("*** 没有 log4j-properties-location 初始化的文件, 所以使用 BasicConfigurator初始化");              BasicConfigurator.configure();          } else {              String webAppPath = sc.getRealPath("/");              String log4jProp = webAppPath + log4jLocation;              File yoMamaYesThisSaysYoMama = new File(log4jProp);              if (yoMamaYesThisSaysYoMama.exists()) {                  System.out.println("使用: " + log4jProp+"初始化日志设置信息");                  PropertyConfigurator.configure(log4jProp);              } else {                  System.err.println("*** " + log4jProp + " 文件没有找到， 所以使用 BasicConfigurator初始化");                  BasicConfigurator.configure();              }          }          super.init(config);      }      /**      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)      */      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {          // TODO Auto-generated method stub      }      /**      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)      */      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {          // TODO Auto-generated method stub      }  }

上面的两个文件放置于src/com/firstserver路径下
lib路径下存放依赖的jar包
build.sh脚本内容

#!/bin/shMYCLASS=/usr/tomcat/apache-tomcat-7.0.67/lib/servlet-api.jarfor file in lib/*    do        MYCLASS=$MYCLASS:$file    doneexport CLASSPATH=$CLASSPATH:$MYCLASSjavac src/com/firstserver/server/*.java -d WebContent/WEB-INF/classescp resource/* WebContent/WEB-INF/classes/com/firstserver/servercp -R lib WebContent/WEB-INF/

deploy.sh用于在编译完之后，将目标文件拷贝到运行目录
deploy.sh

#!/bin/shpushd /usr/tomcat/apache-tomcat-7.0.67/webapps/MyFirstServersudo rm -rf WEB-INF/popdsudo cp -R WebContent/WEB-INF /usr/tomcat/apache-tomcat-7.0.67/webapps/MyFirstServerpushd /usr/tomcat/apache-tomcat-7.0.67/binsudo ./shutdown.shsudo ./startup.shpopd

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name></display-name>  <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list>  <servlet>          <servlet-name>Log4JTestServlet</servlet-name>          <servlet-class>com.firstserver.server.Log4JTestServlet</servlet-class>    </servlet>    <!--用来启动 log4jConfigLocation的servlet -->    <servlet>        <servlet-name>Log4JInitServlet</servlet-name>        <servlet-class>com.firstserver.server.Log4JInitServlet</servlet-class>        <init-param>            <param-name>log4j-properties-location</param-name>            <param-value>/WEB-INF/classes/log4j.properties</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>Log4JTestServlet</servlet-name>        <url-pattern>/test</url-pattern>    </servlet-mapping>  </web-app>

走向maven

后来这个项目需要交给qa来发布，他们说一定要是maven的工程，于是我又不得不将这个目录更改，如何搭建maven的开发环境这里就略过了，我当时就是从干java开发的同事那里拷贝了一个maven的包，然后解压，修改了其中的conf路径下的setting文件，改了下localRepository这个配置

build.shpom.xmlsrc/   main/       java/       webapp/             WEB-INF/                     web.xml

这里的java路径下面的所放内容跟上面的src是一样的
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>com.firstserver.server</groupId>  <artifactId>MyFirstServer</artifactId>  <packaging>war</packaging>  <version>1.0-SNAPSHOT</version>  <name>MyFirstServer Maven Webapp</name>  <url>http://maven.apache.org</url>  <dependencies>      <groupId>commons-io</groupId>      <artifactId>commons-io</artifactId>      <version>2.4</version>    </dependency>    <dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-api</artifactId>      <version>1.7.5</version>    </dependency>  </dependencies>  <build>    <finalName>MyFirstServer</finalName>  </build></project>

pom文件只是一个例子，本文例子程序所需要的依赖包没有全列在里边。
编译时执行build.sh就可以
build.sh

#!/bin/shexport MAVEN_HOME=/home/myhome/javacode/apache-maven-3.2.5export PATH=${MAVEN_HOME}/bin:${PATH}mvn clean package