Springboot项目的多数据源配置
spring boot项目配置多个数据源很常见！
话不多说，上代码。
首先先在system账号下创建了一个用户test1,并授予权限
create user test1 identified by 123456;
grant connect,resource to test1; 接下来登录test1用户，创建一个表student
create table student
(
id number primary key,
name varchar2(30),
address varchar2(100)
);
项目目录如下：
修改之前的配置文件
spring:
datasource:
driver-class-name: oracle.jdbc.driver.OracleDriver
url: jdbc:oracle:thin:@localhost:1521:ORCL
username: test
password: 123456调整后多个数据源后的配置
spring:
datasource:
main:
driver-class-name: oracle.jdbc.driver.OracleDriver
jdbc-url: jdbc:oracle:thin:@localhost:1521:ORCL
username: test
password: 123456
ext:
driver-class-name: oracle.jdbc.driver.OracleDriver
jdbc-url: jdbc:oracle:thin:@localhost:1521:ORCL
username: test1
password: 123456主数据源配置：
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.sql.DataSource;
/**
* 主数据源配置
*/
@Configuration
public class MainDataSource {
@Bean(name = "mainDataSources")
@Primary
@ConfigurationProperties(prefix = "spring.datasource.main")
public DataSource mainDataSource() {
return DataSourceBuilder.create().build();
}
}
主数据源的mybatis配置
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
/**
* 主数据源的mybatis配置
*/
@Configuration
@MapperScan(basePackages = "com.example.demo.mapper", sqlSessionFactoryRef = "mainSqlSessionFactory", sqlSessionTemplateRef = "mainSqlSessionTemplate")
public class MainMybatisConfig {
@Autowired
private DataSource mainDataSources;
@Bean(name = "mainSqlSessionFactory")
@Primary
public SqlSessionFactory mainSqlSessionFactory() throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(mainDataSources);
// bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
return bean.getObject();
}
//配置声明式事务管理器
@Bean(name = "mainTransactionManager")
@Primary
public PlatformTransactionManager mainTransactionManager() {
return new DataSourceTransactionManager(mainDataSources);
}
@Bean(name = "mainSqlSessionTemplate")
@Primary
public SqlSessionTemplate mainSqlSessionTemplate(
@Qualifier("mainSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
副数据源配置：
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* 副数据源配置
*/
@Configuration
public class ExtDataSource {
@Bean(name = "extDataSources")
@Qualifier(value = "extDataSources")
@ConfigurationProperties(prefix = "spring.datasource.ext")
public DataSource extDataSource() {
return DataSourceBuilder.create().build();
}
}
副数据源的mybatis配置：
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
/**
* 副数据源的mybatis配置
*/
@Configuration
@MapperScan(basePackages = "com.example.demo.extMapper", sqlSessionFactoryRef = "extSqlSessionFactory", sqlSessionTemplateRef = "extSqlSessionTemplate")
public class ExtMybatisConfig {
@Autowired
@Qualifier(value = "extDataSources")
private DataSource extDataSource;
@Bean(name = "extSqlSessionFactory")
public SqlSessionFactory extSqlSessionFactory() throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(extDataSource);
// bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:extMapper/*.xml"));
return bean.getObject();
}
//配置声明式事务管理器
@Bean(name = "extTransactionManager")
public PlatformTransactionManager extTransactionManager() {
return new DataSourceTransactionManager(extDataSource);
}
@Bean(name = "extSqlSessionTemplate")
public SqlSessionTemplate extSqlSessionTemplate(
@Qualifier("extSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
StudentMapper类
import com.example.demo.entity.Student;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
@Mapper
public interface StudentMapper {
List queryList();
}
StudentMapper.xml文件
UserMapper文件
import com.example.demo.entity.User;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserMapper {
List queryList();
}
UserMapper.xml
controller类：
import com.example.demo.entity.Student;
import com.example.demo.entity.User;
import com.example.demo.extMapper.StudentMapper;
import com.example.demo.mapper.UserMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping("/user")
public class UserController {
private static final Logger logger = LoggerFactory.getLogger(UserController.class);
@Autowired
private UserMapper userMapper;
@Autowired
private StudentMapper studentMapper;
@PostMapping("/queryUserList")
public List queryUserList() {
return userMapper.queryList();
}
@PostMapping("/queryStudentList")
public List queryStudentList() {
return studentMapper.queryList();
}
}
此时查询结果：
副数据源：
主数据源：
若将副数据源的xml文件放到resources目录下
此时 需要将副数据源的mybatis配置修改下：
