Java响应Http请求：
1、创建项目
因为对Java环境不是很熟悉，第一步卡住了好长时间，
javax怎么引用，
在Java EE 5 Libraries中的javaee.jar中，项目中怎么引用Java EE 5 Libraries，可以网上查一下。
2、创建Servlet类
这一块就是实现代码，继承HttpServlet ，实现doGet和doPost方法即可。
示例源码如下：
package com.nankang; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class HelloServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String clientName = request.getParameter("clientName"); if (clientName != null) { clientName = new String(clientName.getBytes("ISO-8859-1"), "GB2312"); } else { clientName = "我的朋友"; } PrintWriter out; String title = "HelloServlet"; String heading1 = "HelloServlet的doGet方法的输出："; response.setContentType("text/html;charset=GB2312"); out = response.getWriter(); out.print("<HTML><HEAD><TITLE>" + title + "</TITLE>"); out.print("</HEAD><BODY>"); out.print(heading1); out.print("<h1><p>" + clientName + "：你好</h1>"); out.print("</BODY></HTML>"); out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String clientName = "我的朋友"; PrintWriter out; String title = "HelloServlet"; String heading1 = "HelloServlet的doPost方法的输出："; response.setContentType("text/html;charset=GB2312"); out = response.getWriter(); out.print("<HTML><HEAD><TITLE>" + title + "</TITLE>"); out.print("</HEAD><BODY>"); out.print(heading1); out.print("<h1><p>" + clientName + "：你好</h1>"); out.print("</BODY></HTML>"); out.close(); } }
3、更改web.xml
更改配置文件，添加Servlet和Servlet-mapping两个节点。
源码如下：
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>com.nankang.HelloServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/hello</url-pattern> </servlet-mapping> </web-app>
今天是对Java开发环境进行的第一步尝试，加油。
参考文章：http://www.cnblogs.com/panjun-Donet/archive/2010/02/22/1671290.html
