Servlet-解决Post请求中文乱码问题

package com.orzjiangxiaoyu.servlet;

import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;

/**
 * @author orz
 * @create 2020-09-10 22:25
 */
public class ZhPostServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //设置请求体的字符集为utf-8，从而解决post请求的中文乱码问题
        //也必须在获取请求参数之前调用才有效
        req.setCharacterEncoding("UTF-8");

        System.out.println("username:"+req.getParameter("username"));
    }
}