各种编码问题产生原因以及解决办法---------响应编码，请求编码，URL编码

响应编码

产生原因以及解决办法：

示例：

 package cn.yzu;

 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 AServlet extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         response.setContentType("text/html;charset=utf-8");

         response.getWriter().println("张三");

         response.getWriter().println("李四");

     }

 }

运行截图：

请求编码

POST请求：

GET请求(conf/server.xml)：

示例：

index.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

 <%

 String path = request.getContextPath();

 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

 <html>

   <head>

     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>

     <meta http-equiv="pragma" content="no-cache">

     <meta http-equiv="cache-control" content="no-cache">

     <meta http-equiv="expires" content="0">

     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

     <meta http-equiv="description" content="This is my page">

   </head>

   <body>

       <form action="AServlet" method="post">

           <input type="text" value="张三" name="zs">

           <input type="submit" value="post请求">

       </form><hr>

       <form action="AServlet" method="get">

           <input type="text" value="李四" name="ls">

           <input type="submit" value="get请求">

       </form>

   </body>

 </html>

AServlet

 package cn.yzu;

 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 AServlet extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         //处理get请求

         System.out.println(request.getParameter("ls"));    //不处理

         String name = request.getParameter("ls");

         byte[] b = name.getBytes("iso-8859-1");            //回退

         name = new String(b, "utf-8");                    //重编

         System.out.println(name);

     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         //处理post请求

         request.setCharacterEncoding("utf-8");

         String username = request.getParameter("zs");

         System.out.println(username);

     }

 }

页面：

输出结果：

URL编码：

URL编码解码示例：

 import java.io.UnsupportedEncodingException;

 import java.net.URLDecoder;

 import java.net.URLEncoder;

 import org.junit.Test;

 public class Demo {

     @Test

     public void fun1() throws UnsupportedEncodingException {

         String name = "张三";

         String s = URLEncoder.encode(name, "UTF-8");//编码

         System.out.println(s);

         s = URLDecoder.decode(s, "utf-8");            //解码

         System.out.println(s);

     }

 }

结果：

巴特西

各种编码问题产生原因以及解决办法---------响应编码，请求编码，URL编码

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