mybatisplus多数据源
时间: 2023-08-30 09:10:17 浏览: 62
MyBatis Plus supports multiple data sources through its dynamic data source feature. Here's how you can configure and use multiple data sources with MyBatis Plus:
1. Define the data source configurations in your application.properties or application.yml file. For example:
```yaml
spring:
datasource:
master:
url: jdbc:mysql://localhost:3306/master_db
username: root
password: password
slave:
url: jdbc:mysql://localhost:3306/slave_db
username: root
password: password
```
2. Create multiple DataSource objects using the configuration properties. You can use the `@ConfigurationProperties` annotation to bind the properties to the DataSource object. For example:
```java
@Configuration
public class DataSourceConfig {
@Bean
@ConfigurationProperties("spring.datasource.master")
public DataSource masterDataSource() {
return DataSourceBuilder.create().build();
}
@Bean
@ConfigurationProperties("spring.datasource.slave")
public DataSource slaveDataSource() {
return DataSourceBuilder.create().build();
}
}
```
3. Configure a dynamic data source routing mechanism based on your requirements. You can use MyBatis Plus's `AbstractRoutingDataSource` to implement dynamic data source routing. For example:
```java
public class DynamicDataSource extends AbstractRoutingDataSource {
@Override
protected Object determineCurrentLookupKey() {
// Implement your logic to determine the current data source key
return DataSourceContextHolder.getDataSourceKey();
}
}
```
4. Configure MyBatis Plus to use the dynamic data source by setting it as the target data source. For example:
```java
@Configuration
@MapperScan("com.example.mapper")
public class MyBatisConfig {
@Bean
public SqlSessionFactory sqlSessionFactory(DynamicDataSource dynamicDataSource) throws Exception {
SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dynamicDataSource);
return sessionFactory.getObject();
}
}
```
5. Use the `@DS` annotation provided by MyBatis Plus to specify the data source at the method level in your mapper interface. For example:
```java
@DS("master")
public interface UserMapper {
// Define your methods here
}
```
By following these steps, you should be able to configure and use multiple data sources with MyBatis Plus in your application.
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