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);
     }

 }