用Tomcat和Eclipse开发Servlet程序

1、安装eclipse
1)、在官网上直接下载Eclipse IDE for Java EE Developers，解压即可；
2、 eclipse安装tomcat插件：
1)、在http://www.eclipsetotale.com/tomcatPlugin.html上下载tomcatPluginV33.zip
2)、解压到eclipse目录下的plugins目录中
3)、重新启动eclipse
4)、如果你在Window -> Prefences中找不到Server选择的话，说明你的eclipse版本下错了，要下载Eclipse IDE for Java EE Developers
5)、在Server一栏中选择Runtime Environment，在右边选择Add，选择好安装路径后download。下载完成后点击finished，看到选择版本的tomcatServer已经建立
6)、在Window -> Prefences -> Tomcat配置tomcat。Tomcat home 选择刚才下载的目录
7)、点击start tomcat按钮，可以发现大量打印信息，在浏览器中输入http://localhost:8080，出现tomcat的网页，证明已经安装好了。
3 新建Servlet测试程序
1)、选择菜单File->New->Project... ，在新建项目向导中选择 Web->Dynamic Web Project,project name为MyFirstDynamicWebProject，一路next，最后选择生成web.xml；
2)、 new 一个class，package com.johnny.test，name为helloworld，super class 为HttpServlet；

3)、 code：

[java] package com.johnny.test;

import java.io.IOException;

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

public class HelloWorld extends HttpServlet implements javax.servlet.Servlet{
       /* (non-Java-doc)
         * @see javax.servlet.http.HttpServlet#HttpServlet()
         */
        public HelloWorld() {
            super();
        }

        /* (non-Java-doc)
         * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request,
             HttpServletResponse response)
         */
        protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
            response.getWriter().write("Hello, world 1112!");
        }

        /* (non-Java-doc)
         * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
             HttpServletResponse response)
         */
        protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
            // TODO Auto-generated method stub
        }
}

package com.johnny.test;

import java.io.IOException;

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

public class HelloWorld extends HttpServlet implements javax.servlet.Servlet{
    /* (non-Java-doc)
   * @see javax.servlet.http.HttpServlet#HttpServlet()
   */
  public HelloWorld() {
   super();
  }

  /* (non-Java-doc)
   * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request,
       HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
   response.getWriter().write("Hello, world 1112!");
  }

  /* (non-Java-doc)
   * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
       HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
   // TODO Auto-generated method stub
  }
}
web.xml

[html] <?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<servlet>
    <servlet-name>HelloWorld</servlet-name>
    <servlet-class>com.johnny.test.HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>HelloWorld</servlet-name>
    <url-pattern>/helloworld</url-pattern>
</servlet-mapping>

</web-app>

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<servlet>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>com.johnny.test.HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloWorld</servlet-name>
<url-pattern>/helloworld</url-pattern>
</servlet-mapping>

</web-app>
4)、右键点击HelloWorld.java，选择rus as ：run on server，在浏览器上会显示：Hello, world 1112!
5)、或者右键点击工程，export MyFirstDynamicWebProject.war，然后放到ubuntu的tomcat的webapps目录下

补充：Web开发 , php ,