在开发微服务的过程中，有时我们的服务需要连接两个以上的数据库进行业务数据的CRUD操作，这时候就需要我们进行多数据源的配置。
pom.xml
4.0.0
com.tl
hello-spring-boot-dependencies
1.0.0
../hello-spring-boot-dependencies/pom.xml
hello-spring-boot-mybatis-druid
jar
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
org.springframework.boot
spring-boot-devtools
org.springframework.boot
spring-boot-starter-data-jpa
mysql
mysql-connector-java
org.mybatis.spring.boot
mybatis-spring-boot-starter
com.alibaba
druid-spring-boot-starter
org.projectlombok
lombok
io.springfox
springfox-swagger2
io.springfox
springfox-swagger-ui
org.apache.commons
commons-lang3
主要配置文件
datasource.properties
druid.primary.jdbc-url=jdbc:mysql://localhost:3306/source_data
druid.primary.username=root
druid.primary.password=root
druid.primary.driver-class-name=com.mysql.cj.jdbc.Driver
druid.second.jdbc-url=jdbc:mysql://localhost:3306/target_data
druid.second.username=root
druid.second.password=root
druid.second.driver-class-name=com.mysql.cj.jdbc.Driver数据库连接池配置
PrimaryDataSource.java
package com.tl.hello.spring.boot.mybatis.druid.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
* @author tianl
* @date 2020/3/27 22:11
*/
@Configuration
@MapperScan(basePackages = {"com.tl.hello.spring.boot.mybatis.druid.dao.primary"}, sqlSessionFactoryRef = "primarySqlSessionFactory")
@PropertySource("classpath:config/datasource.properties")
public class PrimaryDataSourceConfig {
@Value("${druid.primary.jdbc-url}")
private String jdbcUrl;
@Value("${druid.primary.username}")
private String username;
@Value("${druid.primary.password}")
private String password;
@Value("${druid.primary.driver-class-name}")
private String driverClassName;
@Bean(name = {"primaryDataSource"})
@Primary
public DruidDataSource dataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setUrl(jdbcUrl);
druidDataSource.setUsername(username);
druidDataSource.setPassword(password);
druidDataSource.setDriverClassName(driverClassName);
return druidDataSource;
}
@Bean(name = "primaryTransactionManager")
@Primary
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(this.dataSource());
}
@Bean(name = "primarySqlSessionFactory")
@Primary
public SqlSessionFactory sqlSessionFactory(@Qualifier("primaryDataSource") DataSource dataSource) throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources("classpath:mapper/sourcedata/*Mapper.xml"));
return sessionFactory.getObject();
}
}
SecondDataSource.java
package com.tl.hello.spring.boot.mybatis.druid.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
* @author tianl
* @date 2020/3/27 22:53
*/
@Configuration
@MapperScan(basePackages = {"com.tl.hello.spring.boot.mybatis.druid.dao.second"}, sqlSessionFactoryRef = "secondSqlSessionFactory")
@PropertySource("classpath:config/datasource.properties")
public class SecondDataSourceConfig {
@Value("${druid.second.jdbc-url}")
private String jdbcUrl;
@Value("${druid.second.username}")
private String username;
@Value("${druid.second.password}")
private String password;
@Value("${druid.second.driver-class-name}")
private String driverClassName;
@Bean(name = "secondDataSource")
public DruidDataSource dataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setUrl(jdbcUrl);
druidDataSource.setUsername(username);
druidDataSource.setPassword(password);
druidDataSource.setDriverClassName(driverClassName);
return druidDataSource;
}
@Bean(name = "secondTransactionManager")
public DataSourceTransactionManager transactionManager() {
return new DataSourceTransactionManager(this.dataSource());
}
@Bean(name = "secondSqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources("classpath:mapper/targetdata/*Mapper.xml"));
return sessionFactory.getObject();
}
}
测试：启动一个定时任务同步连个数据中数据
package com.tl.hello.spring.boot.mybatis.druid.service;
import com.tl.hello.spring.boot.mybatis.druid.model.primary.PrimaryUser;
import com.tl.hello.spring.boot.mybatis.druid.model.second.SecondUser;
import com.tl.hello.spring.boot.mybatis.druid.service.primary.PrimaryUserService;
import com.tl.hello.spring.boot.mybatis.druid.service.second.SecondUserService;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
/**
* @author tianl
* @date 2020/3/28 0:51
*/
@Service
public class syncDataService {
@Resource
private PrimaryUserService primaryUserService;
@Resource
private SecondUserService secondUserService;
@Scheduled(cron = "0/5 * * * * ?")
public void sync() {
PrimaryUser primaryUser = primaryUserService.selectByPrimaryKey(19L);
SecondUser secondUser = new SecondUser();
secondUser.setAge(primaryUser.getAge());
secondUser.setName(primaryUser.getName());
secondUser.setUsername(primaryUser.getUsername());
secondUser.setPassword(primaryUser.getPassword());
secondUserService.insertOrUpdate(secondUser);
}
}
代码完成地址：[码云]