spring boot集成mybatis

Posted 2020-09-22 奋小斗Struggle Young

1.在pom中添加依赖：

#mybatis依赖

<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>

#mysql
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>

#分页插件 

<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>4.1.1</version>
</dependency>

#通用mapper
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.3.6</version>
</dependency>

2.在application.properties中添加：

spring.datasource.url=jdbc:mysql://ip:3306/myht?characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.minPoolSize = 3
spring.datasource.maxPoolSize = 25
spring.datasource.maxLifetime = 20000
spring.datasource.borrowConnectionTimeout = 30
spring.datasource.loginTimeout = 30
spring.datasource.maintenanceInterval = 60
spring.datasource.maxIdleTime = 60
spring.datasource.testQuery =select 1
spring.datasource.autoReconnect = true
spring.datasource.test-while-idle=true
spring.datasource.time-between-eviction-runs-millis=27800

3.MyBatis基础配置

/** * MyBatis基础配置 * * @author liuzh * @since 2015-12-19 10:11 */

@Configuration
@EnableTransactionManagement
public class MyBatisConfig implements TransactionManagementConfigurer {

@Autowired
DataSource dataSource;

@Bean(name = "sqlSessionFactory")
public SqlSessionFactory sqlSessionFactoryBean() {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setTypeAliasesPackage("com.bfd.api.*.domain");

//分页插件
PageHelper pageHelper = new PageHelper();
Properties properties = new Properties();
properties.setProperty("reasonable", "true");
properties.setProperty("supportMethodsArguments", "true");
properties.setProperty("returnPageInfo", "check");
properties.setProperty("params", "count=countSql");
pageHelper.setProperties(properties);

//添加插件
bean.setPlugins(new Interceptor[]{pageHelper});

//设置配置参数
org.apache.ibatis.session.Configuration conf = new org.apache.ibatis.session.Configuration();
conf.setMapUnderscoreToCamelCase(true);
//conf.setLogPrefix("api-cloud.");
bean.setConfiguration(conf);

//添加XML目录
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
try {
bean.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
return bean.getObject();
} catch (Exception e) {
LogUtil.error("classpath:mapper/*.xml", "mapper解析错误", e);
throw new RuntimeException(e);
}

}

@Bean
public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}

@Bean
@Override
public PlatformTransactionManager annotationDrivenTransactionManager() {
return new DataSourceTransactionManager(dataSource);
}

}

4.MyBatis扫描接口

/** * MyBatis扫描接口 * * @author liuzh * @since 2015-12-19 14:46 */

@Configuration //TODO 注意，由于MapperScannerConfigurer执行的比较早，所以必须有下面的注解 @AutoConfigureAfter(MyBatisConfig.class) public class MyBatisMapperScannerConfig { @Bean public MapperScannerConfigurer mapperScannerConfigurer() { MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer(); mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory"); mapperScannerConfigurer.setBasePackage("tk.mybatis.springboot.mapper"); return mapperScannerConfigurer; } }

这个配置一定要注意@AutoConfigureAfter(MyBatisConfig.class)，必须有这个配置，否则会有异常。原因就是这个类执行的比较早，由于sqlSessionFactory还不存在，后续执行出错。

做好上面配置以后就可以使用MyBatis了。