POST乱码

 1 package six.four.five.web;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.annotation.WebServlet;
 5 import javax.servlet.http.HttpServlet;
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 import java.io.IOException;
 9 import java.io.PrintWriter;
10 import java.net.URLDecoder;
11 
12 @WebServlet(name = "ServletDemo3")
13 public class ServletDemo3 extends HttpServlet {
14     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
15         // 设置响应内容类型
16         response.setContentType("text/html;charset=UTF-8");
17 
18         PrintWriter out = response.getWriter();
19         String title = "使用 POST 方法读取表单数据";
20 //        String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
21         // 处理中文
22         String docType = "<!DOCTYPE html> 
";
23         out.println(docType +
24                 "<html>
" +
25                 "<head><title>" + title + "</title></head>
" +
26                 "<body bgcolor="#f0f0f0">
" +
27                 "<h1 align="center">" + title + "</h1>
" +
28                 "<ul>
" +
29                 "  <li><b>站点名</b>："
30                 + request.getParameter("name") + "
" +
31                 "  <li><b>网址</b>："
32                 + request.getParameter("url") + "
" +
33                 "</ul>
" +
34                 "</body></html>");
35     }
36 
37     // 处理 POST 方法请求的方法
38     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
39         doGet(request, response);
40     }
41 }

 1 <%--
 2   Created by IntelliJ IDEA.
 3   User: 17999
 4   Date: 2018/6/5
 5   Time: 20:40
 6   To change this template use File | Settings | File Templates.
 7 --%>
 8 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="utf-8" %>
 9 <html>
10   <head>
11     <title>$Title$</title>
12   </head>
13   <body>
20     <form action="http://localhost:8080/TomcatTest/Form" method="POST">
21         网址名：<input type="text" name="name">
22         <br />
23         网址：<input type="text" name="url" />
24         <input type="submit" value="提交" />
25     </form>
36   </body>
37 </html>

解决方法是：

String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");

 1 package six.four.five.web;
 2 
 3 import javax.servlet.ServletException;
 4 import javax.servlet.annotation.WebServlet;
 5 import javax.servlet.http.HttpServlet;
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 import java.io.IOException;
 9 import java.io.PrintWriter;
10 import java.net.URLDecoder;
11 
12 @WebServlet(name = "ServletDemo3")
13 public class ServletDemo3 extends HttpServlet {
14     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
15         // 设置响应内容类型
16         response.setContentType("text/html;charset=UTF-8");
17 
18         PrintWriter out = response.getWriter();
19         String title = "使用 POST 方法读取表单数据";
20         String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
21         // 处理中文
22         String docType = "<!DOCTYPE html> 
";
23         out.println(docType +
24                 "<html>
" +
25                 "<head><title>" + title + "</title></head>
" +
26                 "<body bgcolor="#f0f0f0">
" +
27                 "<h1 align="center">" + title + "</h1>
" +
28                 "<ul>
" +
29                 "  <li><b>站点名</b>："
30                 + name + "
" +
31                 "  <li><b>网址</b>："
32                 + request.getParameter("url") + "
" +
33                 "</ul>
" +
34                 "</body></html>");
35     }
36 
37     // 处理 POST 方法请求的方法
38     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
39         doGet(request, response);
40     }
41 }

第20行

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原文地址：https://www.cnblogs.com/AI-Cobe/p/9290987.html