1.pom.xml加入依赖:
<!--mysql driver-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--jpa-->
<!--<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>-->
<!--MyBatis依赖-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.2.0</version>
</dependency>
2.application.yml加入配置:
spring:
# 数据库连接
datasource:
driver-class-name: com.mysql.jdbc.Driver
username: root
password: root
url: jdbc:mysql://127.0.0.1:3306/demo?characterEncoding=utf-8&useSSL=false
# 数据库框架配置
# jpa:
# show-sql: true
# database-platform: org.hibernate.dialect.MySQL5Dialect
mybatis:
mapper-locations: classpath*:mapper/*.xml
3.加入入口扫描注解:
@SpringBootApplication
@EnableTransactionManagement
@MapperScan("com.zhb.dao")
4.加入*Dao.java和*Mapper.xml文件:
*Dao.java文件:
路径:com.zhb.dao.*Dao.java
类注解:@Mapper
*Mapper.xml文件:
路径:resources/mapper/*.xml
问题排查:
1.是否正确加入依赖,mysql驱动和mybatis依赖
2.配置文件各key-value是否正确且是否生效,注意格式,注意文件路径,尤其疑似入口扫描注解无效问题
3.*Dao.java和*Mapper.xml自定义,注意入口注解路径能正确扫描,注意xml命名空间路径能正确指向
*4.涉及到IDEA Service中@Autowired标红报错:
自行处理
或将@Mapper改为@Repository