<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <parent>

        <artifactId>springboot-demo</artifactId>

        <groupId>cn.xiaojf</groupId>

        <version>1.0-SNAPSHOT</version>

    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>springboot-mybatis-annotation</artifactId>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-freemarker</artifactId>

        </dependency>

        <dependency>

            <groupId>org.mybatis.spring.boot</groupId>

            <artifactId>mybatis-spring-boot-starter</artifactId>

            <version>1.3.1</version>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

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

            <version>5.1.45</version>

        </dependency>

    </dependencies>

</project>

#应用端口号

server.port=8010

#freemarker 默认文件后缀

spring.freemarker.suffix=.html

#数据库设置

spring.datasource.driverClassName = com.mysql.jdbc.Driver

spring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8

spring.datasource.username = root

spring.datasource.password = root

#mybatis 设置

##mybatis.type-aliases-package=cn.xiaojf.springboot.mybatis.annotation.entity

mybatis.mapper-locations=classpath:**/mapper/*.xml

package cn.xiaojf.springboot.mybatis.annotation;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class Application {

    public static void main(String[] args) {

        SpringApplication.run(Application.class, args);

    }

}

package cn.xiaojf.springboot.mybatis.annotation.mapper;

import cn.xiaojf.springboot.mybatis.annotation.entity.User;

import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper

public interface UserMapper {

    List<User> findByUserName(String name);

    User findUserAddrByName(String name);

}

package cn.xiaojf.springboot.mybatis.annotation.service;

public interface UserService {

    void findByUserName(String name);

    void findUserAddrByName(String name);

}

package cn.xiaojf.springboot.mybatis.annotation.service.impl;

import cn.xiaojf.springboot.mybatis.annotation.entity.User;

import cn.xiaojf.springboot.mybatis.annotation.entity.UserAddr;

import cn.xiaojf.springboot.mybatis.annotation.mapper.UserMapper;

import cn.xiaojf.springboot.mybatis.annotation.service.UserService;

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

import org.springframework.stereotype.Service;

import java.util.List;

@Service

public class UserServiceImpl implements UserService {

    @Autowired

    private UserMapper userMapper;

    @Override

    public void findByUserName(String name) {

        List<User> list = userMapper.findByUserName(name);

        if (list != null) {

            for (User user : list) {

                System.out.println(user.getName());

            }

        }

    }

    @Override

    public void findUserAddrByName(String name) {

        User user = userMapper.findUserAddrByName(name);

        if (user != null) {

            List<UserAddr> userAddrList = user.getUserAddrList();

            if (userAddrList != null) {

                for (UserAddr userAddr : userAddrList) {

                    System.out.println(userAddr.getName());

                }

            }

        }

    }

}

https://gitee.com/xiaojf/springboot-demo/tree/master/springboot-mybatis-annotation