一、工程創建
申明一點本案例使用的springboot版本是1.5.6.RELEASE。首先需要創建springBoot項目,添加springBoot框架對MyBatis支持的相關依賴Jar:分別添加MyBatis、MySQL以及Web依賴以及Druid依賴,這裏添加Druid依賴必須是Spring boot支持的Druid,不能使用傳統的Druid。完整的依賴jar如下:
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.28</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.3</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.15</version>
<scope>runtime</scope>
</dependency>
</dependencies>
二、多數據源配置
接下來配置多數據源,首先在配置文件application.properties中配置2個數據庫基本信息,然後配置兩個DataSource即可,這裏筆者把代碼貼出來,並且附上解釋說明信息。application.properties文件的配置:
server.port=7001
spring.application.name=springCloud-multiple-dataSources
spring.instance.instance-id=${spring.application.name}:${server.port}
## 數據源1的配置(此處***替換成自己數據庫的連接串以及用戶名和密碼)
spring.datasource.wxdev.url= ****
spring.datasource.wxdev.username=****
spring.datasource.wxdev.password=****
spring.datasource.wxdev.driverClassName=com.mysql.jdbc.Driver
spring.datasource.wxdev.type=com.alibaba.druid.pool.DruidDataSource
## 數據源2的配置(此處***替換成自己數據庫的連接串以及用戶名和密碼)
spring.datasource.platform.url=***
spring.datasource.platform.username=****
spring.datasource.platform.password=****
spring.datasource.platform.driverClassName=com.mysql.jdbc.Driver
spring.datasource.platform.type=com.alibaba.druid.pool.DruidDataSource
logging.config=classpath:logback_spring.xml
## mybatis mapper文件配置
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
mybatis.config-location=classpath:mybatis/mybatis-config.xml
然後再定義兩個DataSource的配置類(分別對應上面的2個數據源),如下:
@Configuration
@MapperScan(basePackages = "com.chenyun.cloud.mapper.wxdev",sqlSessionTemplateRef = "SqlSessionTemplate1")
public class DataSourceOneConfig {
private static final String MAPPER_LOCATION = "classpath:mybatis/mapper/wxdev/*.xml";
@Value("${spring.datasource.wxdev.url}")
private String url;
@Value("${spring.datasource.wxdev.username}")
private String user;
@Value("${spring.datasource.wxdev.password}")
private String password;
@Value("${spring.datasource.wxdev.driverClassName}")
private String driverClass;
@Bean
@Primary
public DataSource dataSourceOne() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
return dataSource;
}
@Bean(name = "dataSourceOneTransactionManager")
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(dataSourceOne());
}
@Bean(name = "SqlSessionFactory1")
public SqlSessionFactory getSqlSessionFactory1(@Qualifier("dataSourceOne") DataSource dataSource)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return sessionFactory.getObject();
}
@Bean(name = "SqlSessionTemplate1")
public SqlSessionTemplate getSqlSessionTemplate1(
@Qualifier("SqlSessionFactory1") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
@Configuration
@MapperScan(basePackages = "com.chenyun.cloud.mapper.platform", sqlSessionTemplateRef = "SqlSessionTemplate2")
public class DataSourceTwoConfig {
private static final String MAPPER_LOCATION = "classpath:mybatis/mapper/platform/*.xml";
@Value("${spring.datasource.platform.url}")
private String url;
@Value("${spring.datasource.platform.username}")
private String user;
@Value("${spring.datasource.platform.password}")
private String password;
@Value("${spring.datasource.platform.driverClassName}")
private String driverClass;
@Bean(name = "dataSourceTwo")
public DataSource dataSourceTwo() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
return dataSource;
}
@Bean(name = "dataSourceOneTransactionManager")
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(dataSourceTwo());
}
@Bean(name = "SqlSessionFactory2")
public SqlSessionFactory getSqlSessionFactory2(@Qualifier("dataSourceTwo") DataSource dataSourceTwo)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSourceTwo);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return sessionFactory.getObject();
}
@Bean(name = "SqlSessionTemplate2")
public SqlSessionTemplate getSqlSessionTemplate2(
@Qualifier("SqlSessionFactory2") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
上面這個數據源配置類說明:在配置類上面加註解@Configuration表示這是一個可以被spring容器掃描到的配置類,配置類中註解@MapperScan表示要掃描的包路徑com.chenyun.cloud.mapper.platform,即該包下的Mapper接口將操作dataSourceTwo中的數據,對應的SqlSessionFactory和SqlSessionTemplate分別是sqlSessionFactory2和sqlSessionTemplate2,在配置類內部,分別提供SqlSessionFactory和SqlSessionTemplate即可。需要注意的是,多數據源配置必須指定哪個數據源是主數據源,需用註解@Primary標明,例如本案例數據源dataSourceOne上的註解。
現在MyBatis多數據源就配置好了,接下來只需要在com.chenyun.cloud.mapper.wxdev和com.chenyun.cloud.mapper.platform包中提供不同的Mapper接口以及在resources目錄下面創建不同xml映射文件。
接下來,在Service中注入兩個不同的Mapper接口,就可以操作不同的數據源,關於springBoot集成MyBatis多數據源案例就分享到這裏,如有問題,掃碼關注公衆號,聯繫筆者。