1：springboot使用视图解析器，添加依赖

<!-- freemarker模板引擎视图 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-freemarker</artifactId></dependency><!-- 热部署，不用重启 ，这个在这里不需要--><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：主函数需要继承SpringBootServletInitializer，并覆盖其方法。

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页面必须继承SpringBootServletInitializer类重写里面的方法
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，配置了视图解析器之后，controlller返回的String，View等就会先找视图解析器

spring:datasource:driver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql://localhost:3306/demousername: rootpassword: 1367356mvc:view:prefix: /WEB-INF/suffix: .jspmybatis: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;//这个注解不能使用RestController，不然会返回模板类型的页面
@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);//设置返回的数据为json类型，也可以不设置，返回对象//mv.setView(new MappingJackson2JsonView());return mv;}@RequestMapping("index")public String index(){return "index";}}

5：测试成功：

6：目录结构