Servlet response响应数据-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42418309/article/details/120880073

本文详细介绍了在Java后端开发中，如何使用Servlet处理并响应数据。通过register.html页面提交的数据，经过Servlet的处理过程，展示了后端如何接收、处理并返回响应信息。

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
</head>
<body>
    <form action="/demo_servlet_war/rs" method="post">
      用户名：<input type="text" name="username"/><br/>
      密  码：<input type="password" name="password"/><br/>
             <input type="submit" value="注册">
    </form>
</body>
</html>

package com.example.demo_servlet;

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.io.PrintWriter;

@WebServlet(value = "/rs")
public class registerServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String name=req.getParameter("username");
        String password=req.getParameter("password");
        System.out.println("username："+name+password);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //设置request请求对象的编码统一为UTF-8
        req.setCharacterEncoding("UTF-8");
        resp.setContentType("text/html;charset=UTF-8");
        String name=req.getParameter("username");
        String password=req.getParameter("password");
        PrintWriter printWriter =resp.getWriter();
        printWriter.println("注册成功");
    }
}

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