Spring boot集成mybatis
maven依赖
我的spring boot版本是2.5.0,集成mybatis,首先需要数据库的支持,这里我选择mysql数据库,版本是8.0.11,然后使用druid连接池,其次就需要加上mybatis的依赖。
xml
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>
<!--druid-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.4</version>
</dependency>
<!--myabtis-springboot-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.4</version>
</dependency>
yml配置
yml中配置了数据源和mybatis的配置
yml
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true
username: root
password: 123456
# mybatis配置
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: org.syx.dts.entity
configuration:
map-underscore-to-camel-case: true
项目结构
entity包放的是定义的实体,mapper包是各mapper的接口,resources下的mapper放的是mybatis的xml
mapper注解
启动类上的MapperScan("org.syx.dts.mapper")这个注解可写可不写。主要看mapper接口有没有加@Mapper注解,加了,启动类就不需要加MapperScan,当然你加了也无所谓。
各类展示
java
@Data
@AllArgsConstructor
@NoArgsConstructor
public class DailyReport {
private Integer id;
private Integer empTotal;
private Integer deviceTotal;
private Integer deviceUsedNum;
private Integer birthdayEmpNum;
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private LocalDateTime createTime;
}
java
@Mapper
public interface DailyReportMapper {
@Select("insert into daily_report(emp_total,device_total,device_used_num,birthday_emp_num,create_time) values(#{empTotal},#{deviceTotal},#{deviceUsedNum},#{birthdayEmpNum},NOW())")
void save(DailyReport dailyReport);
@Select("select * from daily_report")
List<DailyReport> lists();
}
xml
<?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="org.syx.dts.mapper.DeviceMapper">
<insert id="batchSave">
INSERT INTO `device` (
name,no,description,type,create_time,status
) VALUES
<!-- 使用foreach遍历列表 -->
<foreach item="device" index="index" collection="list" separator=",">
(#{device.name}, #{device.no}, #{device.description}, #{device.type}, NOW(),0)
</foreach>
</insert>
<update id="update">
update `device` set
<if test="status != null and status != ''">
status = #{status}
</if>
where id = #{id}
</update>
<select id="getDeviceList" resultType="org.syx.dts.entity.Device">
select id,name,no,description,type,create_time,status from `device` where 1=1
<if test="name != null and name != ''">
AND name LIKE CONCAT('%', #{name}, '%')
</if>
<if test="flag != null ">
AND status = #{flag}
</if>
</select>
</mapper>
总结
如此,Spring boot集成mybatis就完成了,整个过程是非常简单的。