Servlet回顾

helloServlet类：

接收form.jsp传来的method字符，执行相应的方法,请求转发到hello.jsp
package wsh.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;

public class HelloServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String method=request.getParameter("method");
        if (method.equals("add")){
            request.getSession().setAttribute("method","执行了find方法");
        }

        if (method.equals("find")){
            request.getSession().setAttribute("method","执行了find方法");
        }

        request.getRequestDispatcher("jsp/hello.jsp").forward(request,response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

form.jsp:

接收用户输入text内容提交helloServlet

<%--
  Created by IntelliJ IDEA.
  User: wsh
  Date: 2022/5/28
  Time: 22:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="/spring_mvc_servlet_war_exploded/hello" method="post">
    <input type="text" name="method">
    <input type="submit">

</form>
</body>
</html>

hello.jsp

显示数据session里面拿

<%--
  Created by IntelliJ IDEA.
  User: wsh
  Date: 2022/5/28
  Time: 22:21
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>Hello Spring-MVC</h2>
${sessionScope.method}
</body>
</html>

注意各文件路径是否一致！！！！

posted on 2022-05-28 23:43  唔噗噗噗  阅读(26)  评论(0)    收藏  举报