java命令行构建(三)

前面已经说了打jar包，那怎么打成war包呢？

打成war包会把lib中的jar也加进来,虽然导致war文件有点大,但贵在一个文件，比较方便.

打war包命令也是直接用jar即可:

jar -cvf myh.war *

先看工程的结构:

│  build.py
│
├─build
├─conf
│      log4j.xml
│
├─lib
│      jsp-api.jar
│      log4j.jar
│      servlet-api.jar
│
├─src
│  └─com
│      └─yp
│          └─test
│              └─servlet
│                      MyServlet.java
│
└─WebContent
    │  index.jsp
    │
    └─WEB-INF
            web.xml

只有一个servlet

package com.yp.test.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

/**
 * Servlet implementation class MyServlet
 */
public class MyServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    static Logger log = Logger.getLogger(MyServlet.class);

    /**
     * Default constructor.
     */
    public MyServlet() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        log.info("hello!!!!!log4j");
        response.sendRedirect("index.jsp");
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
    }

}

web.xml增加:

  <servlet>
    <description></description>
    <display-name>MyServlet</display-name>
    <servlet-name>MyServlet</servlet-name>
    <servlet-class>com.yp.test.servlet.MyServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/MyServlet</url-pattern>
  </servlet-mapping>

build.py代码:

#!/usr/bin/python
#coding:UTF-8

import paramiko,datetime,os,logging
import os,shutil
import sys
import time

# 遍历文件侠
def getFiles(dir, suffix):
    res = []
    for root, directory, files in os.walk(dir):
        for filename in files:
            name, suf = os.path.splitext(filename)
            if suf == suffix:
                res.append(os.path.join(root, filename))
    return res


# 一些变量
jarFileName = "myh.jar"
webFold = "WebContent"

basedir = os.getcwd()

# clean,init some path
logging.error("current workplace:"+os.getcwd()+",clean build")

if os.path.exists(basedir+"\\"+"build"):
    shutil.rmtree(basedir+"\\"+"build")
os.mkdir(basedir+"\\"+"build")
os.mkdir(basedir+"\\"+"build\\classes")


# compile
logging.error("begin compile")

# 把文件列表加入到sourcefiles 文件中
file=open('sourcefiles','w')
for tfile in getFiles(basedir+'/src/', '.java'):
    file.writelines (tfile+'\n')
file.close()
# 执行编译
os.chdir(basedir)
result = os.system("javac -encoding utf8 -sourcepath src @sourcefiles -d build/classes  -Djava.ext.dirs=./lib ")


# 判断编译结果
if result!=0:
    logging.error('javac error')   
    os.system("pause")
    sys.exit()

# logging.error("开始copy配置文件")
os.system("cp conf/* build/classes")


# copy lib和classes
os.system('cp -r lib '+basedir+'/'+webFold+'/WEB-INF/')
os.system("cp -r "+basedir+"/build/classes  "+basedir+"/"+webFold+"/WEB-INF/")

# war
os.system("jar -cvf myh.war -C "+webFold+"/ .")

# clean
os.remove(basedir+"/sourcefiles")
os.system("pause")

测试：

放到tomcat后，启动tomcat 启动
http://127.0.0.1:8080/myh/MyServlet 就可以看到效果了.

说明:

• WEB-INF是 javaee的标准结构,里面有个web.xml， tocmat等jee容器即认.
• 打war包比打jar包要简单，毕竟不用去管可运行文件和清单文件，只需要把jar扔到 WEB-INF/lib中即可。
• javac命令中，没有用 classpath了，而是用 -Djava.ext.dirs=./lib ,用classpath选项的话，就要生成多个jar包的路径到 -cp后. 用 -Djava.ext.dirs 是有风险的，请参考http://blog.youkuaiyun.com/scugxl/article/details/43240991
• 我是先把java文件编译成class文件放到build/classes中，然后把文件夹cp到 WEB-INF下
• 打成war 包下面的清单文件貌似没啥用。
• 需要两个入参:jarFileName,webFold
• 代码:https://github.com/huawumingguo/javacmd/