request对象和response对象

Web服务器收到客户端的http请求，会针对每一次请求，分别创建一个用于代表请求的request对象、和代表响应的response对象 p> 

p>HttpServletResponse

p> 

p>HttpServletResponse对象代表服务器的响应。这个对象中封装了向客户端发送数据、发送响应头，发送响应状态码的方法。

p> 

p>1.向客户端输出中文数据（字节）

p> 

p>复制代码

p>package cn.lsl.response;

p>import java.io.IOException;

p>import javax.servlet.ServletException;

p>import javax.servlet.ServletOutputStream;

p>import javax.servlet.http.HttpServlet;

p>import javax.servlet.http.HttpServletRequest;

p>import javax.servlet.http.HttpServletResponse;

p> 

p>public class ResponseDemo1 extends HttpServlet {

p> 

p>    public void doGet(HttpServletRequest request, HttpServletResponse response)

p>            throws ServletException, IOException {

p>        test5(response);

p>    }

p>    

p>    //输出整数：最好转换成字符串输出

p>    private void test5(HttpServletResponse response) throws IOException{

p>        int i = 98;

p>        response.getOutputStream().write((i+"").getBytes());

p>    }

p>    

p>    //以字节流用默认编码向客户端输出中文数据：没有乱码

p>    //默认的是GBK

p>    private void test1(HttpServletResponse response) throws IOException{

p>        String s = "你好！一";

p>        ServletOutputStream out = response.getOutputStream();

p>        out.write(s.getBytes());

p>    }

p>    

p>    //以字节流用utf-8编码向客户端输出中文数据

p>    //以UTF-8编码发送数据，浏览器(默认用GB2312)会出现乱码

p>    private void test2(HttpServletResponse response) throws IOException{

p>        String s = "你好！二";

p>        //通知客户端查看UTF-8码表

p>        response.setHeader("Content-Type", "text/html;charset=UTF-8");

p>        ServletOutputStream out = response.getOutputStream();

p>        out.write(s.getBytes("UTF-8"));

p>    }

p>    

p>    //以字节流用utf-8编码向客户端输出中文数据

p>    private void test3(HttpServletResponse response) throws IOException{

p>        String s = "你好！三";

p>        ServletOutputStream out = response.getOutputStream();

p>        out.write("<meta http-equiv='Content-Type' content='text/html;charset=UTF-8'>".getBytes("UTF-8"));

p>        out.write(s.getBytes("UTF-8"));

p>    }