SpringBoot整合MyBatis(注解版)

详情可以参考Mybatis官方文档　　http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/

（1）、引入Mybatis针对SpringBoot制作的Starter依赖

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>

（2）、配置Mybatis设置

package cn.coreqi.config;

import org.mybatis.spring.boot.autoconfigure.ConfigurationCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MybatisConfig {
    @Bean
    public ConfigurationCustomizer configurationCustomizer(){
        return new ConfigurationCustomizer() {
            @Override
            public void customize(org.apache.ibatis.session.Configuration configuration) {
                configuration.setMapUnderscoreToCamelCase(true);    //开启驼峰命名
            }
        };
    }
}

（3）、编写Mapper接口

package cn.coreqi.mapper;

import cn.coreqi.entities.User;
import org.apache.ibatis.annotations.*;

//@Mapper   告诉SpringBoot这是一个操作数据库的mapper
@Mapper
public interface UserMapper {
    @Select("select * from users where Id = #{id}")
    public User getUserById(Integer id);

    @Insert("insert into users(UserName,PassWord,Enabled) values(#{UserName},#{PassWord},#{Enabled})")
    @Options(useGeneratedKeys = true,keyProperty = "Id")    //使用自增主键，并指定主键的列名称
    public int addUser(User user);

    @Update("update users set UserName = #{UserName},PassWord = #{PassWord},Enabled = #{Enabled} where Id = #{Id}")
    public int modifyUser(User user);

    @Delete("delete from users where Id = #{id}")
    public int delUserById(Integer id);

}

（4）、扫描所有的Mapper接口

package cn.coreqi;

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

@SpringBootApplication
@MapperScan(value = "cn.coreqi.mapper")     //扫描指定路径下所有的Mapper接口
public class SpringbootjdbcApplication {

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

}