SpringBoot 整合jsp

一：用idea 创建 springboot 项目：

详情请参考：《使用IDEA创建一个springboot项目》

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二：具体代码内容：

1：代码结构

2:JspApplication

package com.alancode.springboot;

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

/***
 *
 *
 *@author Alan_Liu
 *@date 2021/2/16 23:17
 *
 **/
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
public class JspApplication {

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

}
/**
 * @description: JspApplication  项目启动器
 * <p>
 * 注意：
 * 关于编写启动器需要注意的问题。
 * 启动器存放位置：启动器可以和controller 位于同一个包 package下，或者位于controller的上一级包。
 * 但是不能把该文件放到controller平行级的包或者其子包下。
 * @author: Alan_Liu
 * @create: 2021/2/16 23:17
 */

3:HelloWorld

package com.alancode.springboot.controller;/**
 * @author Alan_liu
 * @Create 2021/2/16 23:33
 */

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

/**
 *@program: SpringBootAddJsp
 *@description: HelloWorld
 *@author: Alan_Liu
 *@create: 2021-02-16 23:33
 */
public class HelloWorld {
	/**
	 * @return
	 * @throws
	 * @Param: []
	 * @author Alan_Liu
	 * @date 2021/2/14 21:52
	 **/
	@RequestMapping("/hello")
	@ResponseBody
	public Map<String, Object> showHelloWolrd() {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("msg", "HelloWorld");
		return map;
	}
}

4:UserController

package com.alancode.springboot.controller;
/**
 * @author Alan_liu
 * @Create 2021/2/16 21:40
 */

import com.alancode.springboot.pojo.Users;
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;

/**
 *@description: SpringBoot 整合 jsp
 *@author: Alan_Liu
 *@create: 2021-02-16 21:40
 */
@Controller  /**做view视图 跳转的  所有这里不能使用@RestController ***/
public class UserController {

	  @RequestMapping("/showUserInfo")
      public String showUser(Model model){
		 List<Users> list=new ArrayList<>();
		 list.add(new Users(1,"张三",20)) ;
		 list.add(new Users(2,"李四",20)) ;
		 list.add(new Users(3,"王五",20)) ;
		 list.add(new Users(4,"赵六",20)) ;
		 //需要一个 model 对象
         model.addAttribute("list",list);
         //视图跳转
		 return "userList";
      }
}

5:Users

package com.alancode.springboot.pojo;
/**
 * @author Alan_liu
 * @Create 2021/2/16 21:44
 */

/**
 *@program: SpringBootAddJsp
 *@description: 用户
 *@author: Alan_Liu
 *@create: 2021-02-16 21:44
 */
public class Users {

	private Integer userid;
	private String  username;
	private Integer userage;

	public Integer getUserid() {
		return userid;
	}

	public void setUserid(Integer userid) {
		this.userid = userid;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public Integer getUserage() {
		return userage;
	}

	public void setUserage(Integer userage) {
		this.userage = userage;
	}

	@Override
	public String toString() {
		return "Users{" +
				"userid=" + userid +
				", username='" + username + '\'' +
				", userage=" + userage +
				'}';
	}

	public Users() {
	}

	public Users(Integer userid, String username, Integer userage) {
		this.userid = userid;
		this.username = username;
		this.userage = userage;
	}

	public Users(Integer userid) {
		this.userid = userid;
	}

	public Users(Integer userid, String username) {
		this.userid = userid;
		this.username = username;
	}

	public Users(String username) {
		this.username = username;
	}

	public Users(String username, Integer userage) {
		this.username = username;
		this.userage = userage;
	}
}

6:application.properties

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

7:userList.jsp

<%--
  Created by IntelliJ IDEA.
  User: Alan_Liu
  Date: 2021/2/16
  Time: 23:11
  To change this template use File | Settings | File Templates.
--%>
<%@ page language="java" contentType="text/html;charset=UTF-8"  pageEncoding="utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c" %>
<% System.out.println("----这里有没有进来-----"); %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<table border="1" align="center" width="50%">
  <tr>
      <td>ID</td>
      <td>Name</td>
      <td>Age</td>
  </tr>
    <c:forEach items="${list}" var="user">
          <tr>
                <td>${user.userid}</td>
                <td>${user.username}</td>
                <td>${user.userage}</td>
            </tr>
    </c:forEach>
</table>
</body>
</html>

8：pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.alanCode.springBoot</groupId>
    <artifactId>SpringBootAddViewJsp</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SpringBootAddViewJsp</name>
    <description>springboot  整合 jsp </description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!--jsp页面使用jstl标签 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!--用于编译jsp -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

9:启动项目

启动正常