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SpringMVC-servlet交互

news 2025/7/14 17:18:43

servlet交互

1.1 引入servlet依赖

 <dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version><scope>provided</scope></dependency>

1.2 创建`testservlet`继承`httpservlet`,重写其`doget`和`dopost`方法,在testservlet类上添加注解`@WebServlet("/login")`,`/login`为映射路径

package com.j3071.web.servlet;/** @Date:2023/10/27* @Description:com.j3071.web.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;@WebServlet("/login")
public class TestServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println("登录了");System.out.println(req.getParameter("userName"));//重定向到指定页面resp.sendRedirect("huanying.jsp");}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {super.doPost(req, resp);}
}

1.3 jsp中添加form表单,`method`选择`get`,`action`为`/login`,使用按钮提交表单,即可把页面上的数据提交到`testservlet`的`doget`方法中

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html>
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body>
<h2>Hello World!</h2>
<%--method 请求方式 action 动作--%>
<form method="get" action="/login"><p>用户名:<input name="userName"></p><p>密码:<input name="passWord"></p><p><button type="submit">登录</button></p></form>
</body>
</html>