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Servlet 乱码解决

2022-07-21 19:27:00 【华为云】

可能存在的乱码的一些解决的办法

乱码的问题主要出现在tomcat8之前，但是目前的插件管理依赖只能到7。

我们还是用一个写的表单，然后写一个Servlet代码

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title></head><body><form action="/jgdabc00" method="post">    <input type="text" name="username">    <input type="password" name="password">    <input type="checkbox" name="hobby" value="1">游泳    <input type="checkbox" name="hobby" value="2">爬山<br>    <input type="submit"></form></body></html>

package jgd;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.util.Map;@WebServlet("/jgdabc00")public class ServletDemo10 extends HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// super.doGet(req, resp);// Get请求逻辑        System.out.println("get---");        this.doPost(req,resp);//    }//    @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        System.out.println("post---");// 获取所有参数的map集合        Map<String, String[]> map = req.getParameterMap();        String queryString = req.getQueryString();        System.out.println(queryString);        for (String key:map.keySet())        {            System.out.print(key+":");            String[] values = map.get(key);            //获取value            for (String value:values)                System.out.println(value+" ");        }// 根据key获取参数值,数组        String[] hobbies = req.getParameterValues("hobby");// for(String hobby:hobbies){// System.out.println(hobby);// }// 根据key获取单个参数值        String password = req.getParameter("password");        System.out.println(password);// 等相同业务代码    }}