直接开撸
假如存在数据源a和b
一、配置文件配置数据源a和b:(这里使用的是springboot2.0+ 默认数据库连接池hikari)
spring:
datasource:
a:
driver-class-name: oracle.jdbc.OracleDriver
jdbc-url:
username:
password:
pool-name:
b:
driver-class-name: oracle.jdbc.OracleDriver
jdbc-url:
username:
password:
pool-name:
二、采用分包的方式配置两个数据源,生成不同的数据源和SqlSessionFactory,且指定不同位置的maperr(接口和xml文件)
/**
* @title 数据源a配置
* @discribtion
* basePackages 指定mapper接口类路径
* sqlSessionFactoryRef 指定唯一一个SqlSessionFactory
* nameGenerator 解决不同包但同名的mapper重名问题
* @vision V1.0
*/
@Configuration
@MapperScan(basePackages = {
"com.app.dao.A.mapper"}, sqlSessionFactoryRef = "ASqlSessionFactory", sqlSessionTemplateRef = "ASqlSessionTemplate", nameGenerator = Application.SpringBeanNameGenerator.class)
public class DBConfig_A
{
@Bean(name = "AJdbcTemplate")
public JdbcTemplate jdbcTemplateStation(@Qualifier("ADataSource") DataSource dataSource)
{
return new JdbcTemplate(dataSource);
}
@Bean(name = "ADataSource")
@ConfigurationProperties(prefix = "spring.datasource.a")
public DataSource dataSource()
{
return DataSourceBuilder.create().build();
}
@Bean(name = "ATranscationManagement")
public PlatformTransactionManager primaryTransactionManage(@Qualifier("ADataSource") DataSource dataSource)
{
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "ASqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(@Qualifier("ADataSource") DataSource dataSource)
throws Exception
{
SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
factoryBean.setDataSource(dataSource);
factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/A/*.xml"));
return factoryBean.getObject();
}
@Bean(name = "ASqlSessionTemplate")
public SqlSessionTemplate sqlSessionTemplateOne(@Qualifier("ASqlSessionFactory") SqlSessionFactory sqlSessionFactory)
throws Exception
{
SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory);
return template;
}
}
/**
* @title 数据源b配置
*/
@Configuration
@MapperScan(basePackages = {"com.app.dao.B.mapper"}, sqlSessionFactoryRef = "BSqlSessionFactory", sqlSessionTemplateRef = "BSqlSessionTemplate", nameGenerator = Application.SpringBeanNameGenerator.class)
public class DBConfig_B
{
@Bean(name = "BJdbcTemplate")
public JdbcTemplate jdbcTemplateStation(@Qualifier("BDataSource") DataSource dataSource)
{
return new JdbcTemplate(dataSource);
}
@Bean(name = "BDataSource")
@ConfigurationProperties(prefix = "spring.datasource.b")
public DataSource dataSource()
{
return DataSourceBuilder.create().build();
}
@Bean(name = "BTranscationManagement")
public PlatformTransactionManager primaryTransactionManage(@Qualifier("BDataSource") DataSource dataSource)
{
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "BSqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(@Qualifier("BDataSource") DataSource dataSource)
throws Exception
{
SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
factoryBean.setDataSource(dataSource);
factoryBean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/B/*.xml"));
return factoryBean.getObject();
}
@Bean(name = "BSqlSessionTemplate")
public SqlSessionTemplate sqlSessionTemplateOne(@Qualifier("BSqlSessionFactory") SqlSessionFactory sqlSessionFactory)
throws Exception
{
SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory);
return template;
}
}
其中分别创建了数据源ADataSource、BDataSource和SqlSessionFactory:ASqlSessionFactory、BSqlSessionFactory以及JdbcTemplate和分开的事务管理ATranscationManagement、BTranscationManagement
指定两个数据源对应mapper接口分别在com.app.dao.A.mapper和com.app.dao.B.mapper,mapper的xml文件分别在resource下mapper/A和mapper/B
启动项目,出现如下即配置成功
测试
两个数据源各建表TESTA、TESTB(字段name,值分别为数据源A、数据源B)
各建mapper:TestMapper 和 查询方法list
执行:
结果: