先整一mysql数据库，数据库testdb中表user包含id和name，用户名和密码都是root

eclipse创建个quickstart项目就行：

最终项目目录结构如图：

POM

   <groupId>com.jyl</groupId>
   <artifactId>jyl</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>jar</packaging>

<name>jyl</name>
<url>http://maven.apache.org</url>

   <parent>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-parent</artifactId>
       <version>1.5.1.RELEASE</version>
   </parent>
   <dependencies>
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>

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

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

       <dependency>
           <groupId>org.mybatis.spring.boot</groupId>
           <artifactId>mybatis-spring-boot-starter</artifactId>
           <version>1.2.0</version>
       </dependency>

       <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
       </dependency>

</dependencies>

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

   <repositories>
       <repository>
           <id>spring-snapshots</id>
           <name>Spring Snapshots</name>
           <url>https://repo.spring.io/libs-snapshot</url>
           <snapshots>
               <enabled>true</enabled>
           </snapshots>
       </repository>
   </repositories>
</project>

application.properties

server.port=8080

spring.datasource.url=jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

mybatis.typeAliasesPackage=com.jyl.jyl.domain
mybatis.mapperLocations=classpath:mapper/*.xml

入口函数

App.java类（这里@MapperScan已经写了mybatis的Mapper扫描包地址）：

package com.jyl.jyl;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

有了入口函数，springboot项目就可以运行起来了，然后我们就开始写controller

controller

package com.jyl.jyl.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

import com.jyl.jyl.service.MyService;

@Controller
public class pageController {
   @Autowired
   private MyService ser;


   @RequestMapping("/")
   public String index(ModelMap map) {
       map.addAttribute("abc", ser.fun(0).getName());
       return "index";
   }
}

这样我们访问127.0.0.1:8080就可以进入index函数，该函数返回的是index.html页面。此处用的是thymeleaf，我们通过service连接到mybatis查询到数据，写入属性abc，界面中取出该值。

service

package com.jyl.jyl.service;

import com.jyl.jyl.domain.User;

public interface MyService {
public User fun(int id);
}

serviceImpl

package com.jyl.jyl.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.jyl.jyl.dao.userMapper;
import com.jyl.jyl.domain.User;

@Service
public class MyserviceImp implements MyService{

   @Autowired
   private userMapper UserMapper;

   public User fun(int id) {
       User user = null;
       try {
           user = UserMapper.fun(id);
       }catch(Exception e)
       {

       }
       return user;
   }
}

mybatis

package com.jyl.jyl.dao;
import org.apache.ibatis.annotations.Param;

import com.jyl.jyl.domain.User;

public interface userMapper {
public User fun(@Param("id")int id) throws Exception;
}

对应xml为：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.jyl.jyl.dao.userMapper">
<select id="fun" parameterType="int"
resultType="com.jyl.jyl.domain.User">
select name from user where id=#{id}
</select>
</mapper>

index.html

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title></title>
</head>
<body>
<h1 th:text="${abc}">*****</h1>
<img src="img/1.jpg"></img>
</body>
</html>

springboot项目搭建（mybatis + thymeleaf）

POM