1：springboot使用視圖解析器，添加依賴

        <!-- freemarker模板引擎視圖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>

        <!-- 熱部署，不用重啟 ，這個在這裏不需要
 
-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- jsp解析器 -->
        <dependency>
 

            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

2：主函數需要繼承SpringBootServletInitializer，並覆蓋其方法。

package com.liyafei;

import org.springframework.boot.SpringApplication;
 
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;

@EnableAutoConfiguration
@SpringBootApplication
//返回jsp頁面必須繼承SpringBootServletInitializer類重寫裏面的方法
public class Main extends SpringBootServletInitializer{

    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
        
    }
    
    protected SpringApplicationBuilder config(SpringApplicationBuilder applicationBuilder){
        return applicationBuilder.sources(Main.class);
    }
}

3：配置文件中添加spring.mvc.view配置

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/demo
    username: root
    password: 1367356
  mvc:
    view:
      prefix: /WEB-INF/
      suffix: .jsp

mybatis:
  config-location: classpath:mybatis-config.xml

4：controller映射

package com.liyafei.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

import com.liyafei.pojo.User;

//這個註解不能使用RestController，不然會返回模板類型的頁面
@Controller
public class MyController {
    
    User user=new User();
    @RequestMapping("/my")
    public ModelAndView test(){
        ModelAndView mv=new ModelAndView();
        mv.setViewName("modelandview");
        mv.addObject("name", "liyafei");
        user.setAge(20);
        user.setName("wangwu");
        mv.addObject("user", user);
        
        //設置返回的數據為json類型，也可以不設置，返回對象
        //mv.setView(new MappingJackson2JsonView());
        return mv;
    }
    @RequestMapping("index")
    public String index(){
        return "index";
    }

}

5：測試成功：

6：目錄結構

spring boot 使用視圖modelandview