岩哥带你飞——Spring 学习1&重要组件

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准备工作：1、创建一个web 项目

2、创建一个Servelt (这里采用注解开发)（Servlet开发方式 xml 注解 Java ）

3、创建一个jsp

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package com.bw;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 *    不过滤jsp
 *
 *
 * font   设计模式，前端设计模式
 * @author Allen17805272076
 *
 */
@WebServlet("/")
public class DispatchServlet extends HttpServlet{

    /**
     *
     */
    private static final long serialVersionUID = 8819789068715278298L;

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        String string = req.getParameter("control");
        System.out.println(string);
        if(string.equals("demo1")) {
            System.out.println("demol被调用");

        }
        if(string.equals("demo2")) {
            System.out.println("demo2被调用");

        }
        if(string.equals("demo3")) {
            System.out.println("demo3被调用");

        }
        if(string.equals("demo4")) {
            System.out.println("demo4被调用");

        }
    System.out.println("执行控制器");
    }

}

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<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
  <a href="dispatcher?control=demo1">跳转1</a>
  <a href="dispatcher?control=demo2">跳转2</a>
  <a href="dispatcher?control=demo3">跳转3</a>
  <a href="dispatcher?control=demo4">跳转4</a>
</body>
</html>