HttpServletRequ接口的使用和jsp内置对象的request对象非常类似，request对象其实

就是HttpServletRequest接口的一个实例，不过气实例化的过程是自动的，无须自定义。

以下示例达到的效果为：通过一个HttpServletRequest接口的实利化对象设置并取得

request范围属性的示例。

RequestDemo.java

1 package com.mhb; 2  3 import java.io.IOException; 4 import java.io.PrintWriter; 5  6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse;10 11 public class RequestDemo extends HttpServlet {12 13 public void init() throws ServletException {14 }15 public void doGet(HttpServletRequest request, HttpServletResponse response)16 throws ServletException, IOException {17 18 //设置输出内容的格式和编码19 response.setContentType("text/html;charset=gb2312");20 PrintWriter out = response.getWriter();21 22 //存储在request范围内23 request.setAttribute("name", "测试者");24 //取得request范围name的属性25 String name = (String) request.getAttribute("name");26 27 out.println("");28 out.println("");29 out.println("name:"+name);30 out.println("");31 out.println("");32 33 }34 public void doPost(HttpServletRequest request, HttpServletResponse response)35 throws ServletException, IOException {36 }37 public void destroy() {38 super.destroy();39 }40 }

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