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
