Request请求参数中文乱码问题

2023-10-09 10:58:28

少说点话，先来个表单，get请求，提交跑/myRequest/requestDemo4接口

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>请求</title>
</head>
<body>
    <form method="get" action="/myRequest/requestDemo4">
        <input type="text" placeholder="请输入用户名" name="name" >
        <input type="submit" value="提交">
    </form>
</body>
</html>

所以来个接口，接收参数输出

package com.lingaolu.request;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;

/**
 * @author 林高禄
 * @create 2020-07-07-12:06
 */
@WebServlet("/requestDemo4")
public class RequestDemo4 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String name = request.getParameter("name");
        System.out.println("名字为："+name);
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String name = request.getParameter("name");
        System.out.println("名字为："+name);
        this.doPost(request,response);
    }
}

表单发出请求

请求结束，后台输出

中文能正常输出

把表单改为post请求

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>请求</title>
</head>
<body>
    <form method="post" action="/myRequest/requestDemo4">
        <input type="text" placeholder="请输入用户名" name="name" >
        <input type="submit" value="提交">
    </form>
</body>
</html>

同样的操作发出请求，后台输出

出现了乱码，不要怕，加一行代码，因为我们的html表单的编码方式为uft-8,所以接口加上这段代码request.setCharacterEncoding("utf-8");

package com.lingaolu.request;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;

/**
 * @author 林高禄
 * @create 2020-07-07-12:06
 */
@WebServlet("/requestDemo4")
public class RequestDemo4 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        System.out.println("名字为："+name);
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String name = request.getParameter("name");
        System.out.println("名字为："+name);
        this.doPost(request,response);
    }
}

重启，还是post请求，请求，后台输出

这就解决了乱码问题

码农公寓

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