整合JSP

1.项目整体目录结构：

项目整体目录结构.png

2.向pom文件中添加坐标

        <!-- jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <!-- jasper -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

3.创建 springBoot 的全局配置文件，application.properties

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

4.创建 Controller

package com.deewinkg.controller;

import com.deewinkg.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

@Controller
public class UserController
{
    /**
     * 处理请求，产生数据。
     * @param model
     * @return
     */
    @RequestMapping("/showUser")
    public String showUser(Model model)
    {
        List<User> userList = new ArrayList<>();
        userList.add(new User("1","刘备",50));
        userList.add(new User("2","关羽",48));
        userList.add(new User("3","张飞",45));
        // 需要一个Model对象
        model.addAttribute("userList",userList);
        // 跳转视图
        return "showUser";
    }
}

package com.deewinkg.pojo;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.Setter;

import java.io.Serializable;
@AllArgsConstructor
@Setter
@Getter
public class User implements Serializable
{
    private String id;
    private String name;
    private int age;
}

5.创建showUser.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
</head>
<body>
    <table border="1" align="center" width="50%">
        <thead>
            <tr>
                <th>ID</th>
                <th>Name</th>
                <th>Age</th>
            </tr>
        </thead>
        <tbody>
            <c:forEach items="${userList}"  var="user" >
                <tr>
                    <td>${user.id}</td>
                    <td>${user.name}</td>
                    <td>${user.age}</td>
                </tr>
            </c:forEach>
        </tbody>
    </table>
</body>
</html>

6.创建启动类

package com.deewinkg;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App
{
    public static void main(String[] args) {
        SpringApplication.run(App.class,args);
    }
}

7.运行结果

运行结果.png