响应编码
产生原因以及解决办法：
示例：
1 package cn.yzu;
2 import java.io.IOException;
3 import javax.servlet.ServletException;
4 import javax.servlet.http.HttpServlet;
5 import javax.servlet.http.HttpServletRequest;
6 import javax.servlet.http.HttpServletResponse;
7 public class AServlet extends HttpServlet {
8 public void doGet(HttpServletRequest request, HttpServletResponse response)
9 throws ServletException, IOException {
10 response.setContentType("text/html;charset=utf-8");
11 response.getWriter().println("张三");
12 response.getWriter().println("李四");
13 }
14 }
运行截图：
请求编码
POST请求：
GET请求(conf/server.xml)：
示例：
index.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 7 <html> 8 <head> 9 <base href="<%=basePath%>"> 10 <title>My JSP ‘index.jsp‘ starting page</title> 11 <meta http-equiv="pragma" content="no-cache"> 12 <meta http-equiv="cache-control" content="no-cache"> 13 <meta http-equiv="expires" content="0"> 14 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 15 <meta http-equiv="description" content="This is my page"> 16 </head> 17 <body> 18 <form action="AServlet" method="post"> 19 <input type="text" value="张三" name="zs"> 20 <input type="submit" value="post请求"> 21 </form><hr> 22 <form action="AServlet" method="get"> 23 <input type="text" value="李四" name="ls"> 24 <input type="submit" value="get请求"> 25 </form> 26 </body> 27 </html>
AServlet
1 package cn.yzu;
2 import java.io.IOException;
3 import javax.servlet.ServletException;
4 import javax.servlet.http.HttpServlet;
5 import javax.servlet.http.HttpServletRequest;
6 import javax.servlet.http.HttpServletResponse;
7 public class AServlet extends HttpServlet {
8 public void doGet(HttpServletRequest request, HttpServletResponse response)
9 throws ServletException, IOException {
10 //处理get请求
11 System.out.println(request.getParameter("ls")); //不处理
12 String name = request.getParameter("ls");
13 byte[] b = name.getBytes("iso-8859-1"); //回退
14 name = new String(b, "utf-8"); //重编
15 System.out.println(name);
16
17 }
18 public void doPost(HttpServletRequest request, HttpServletResponse response)
19 throws ServletException, IOException {
20 //处理post请求
21 request.setCharacterEncoding("utf-8");
22 String username = request.getParameter("zs");
23 System.out.println(username);
24 }
25 }
页面：
输出结果：
URL编码：
URL编码解码示例：
1 import java.io.UnsupportedEncodingException;
2 import java.net.URLDecoder;
3 import java.net.URLEncoder;
4 import org.junit.Test;
5 public class Demo {
6 @Test
7 public void fun1() throws UnsupportedEncodingException {
8 String name = "张三";
9 String s = URLEncoder.encode(name, "UTF-8");//编码
10 System.out.println(s);
11 s = URLDecoder.decode(s, "utf-8"); //解码
12 System.out.println(s);
13 }
14 }
结果：
时间： 2024-07-31 11:47:37