springboot+mybatis+Druid配置多数据源(mysql+postgre)
引入pom依赖
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.1
com.alibaba
druid-spring-boot-starter
1.1.9
org.springframework.boot
spring-boot-starter-jdbc
mysql
mysql-connector-java
runtime
org.postgresql
postgresql
设置application多数据源
只是在原有的数据库配置外层添加了db1,db2,用来区分数据库;
注意:url使用的是jdbc的jdbc-url
durid无需改变
spring:
datasource:
db1: #配置数据源1:此处配置的mysql数据库
driverClassName: com.mysql.jdbc.Driver
username: root
password: 123456
# spring2.0此处为jdbc-url
jdbc-url: jdbc:mysql://127.0.0.1:3306/aa?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
type: com.alibaba.druid.pool.DruidDataSource
db2: #配置数据源2,此处配置的是postgre数据库
jdbc-url: jdbc:postgresql://127.0.0.1:5432/test1
username: postgres
password: 123456
driverClassName: org.postgresql.Driver
# platform: postgres
type: com.alibaba.druid.pool.DruidDataSource
initialization-mode: always
# ============================== druid ============================== #
druid:
#最大活跃数
maxActive: 20
#初始化数量
initialSize: 1
#最大连接等待超时时间
maxWait: 60000
#打开PSCache，并且指定每个连接PSCache的大小
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
#通过connectionProperties属性来打开mergeSql功能；慢SQL记录
#connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
minIdle: 1
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: select 1 from dual
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
#配置监控统计拦截的filters，去掉后监控界面sql将无法统计,‘wall‘用于防火墙
filters: stat, wall, log4j
config配置
注意:两个数据库的xml文件和mapper文件需要分开放置
db1config配置(主数据库配置)
注意:db1设置为了主数据库,则需要配置注解@Primary
import javax.sql.DataSource;
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.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 org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
/**主数据源mysql配置(需要加@Primary)
* mysql data source config
*
* @author 荆世玉
* @date /2/26 9:07:16
* @description postgresql data source config
*/
@Configuration
//注入mapper
@MapperScan(basePackages = "mons.mapper.mysql.**", sqlSessionTemplateRef = "db1SqlSessionTemplate")
public class DataSource1Config {
@Bean
@Primary
@ConfigurationProperties(prefix = "spring.datasource.db1")//设置配置
public DataSource db1DataSource() {
return DataSourceBuilder.create().build();
}
@Bean
@Primary
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
//设置对应的xml文件位置
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mappers/mysql/*.xml"));
return bean.getObject();
}
@Bean
@Primary
public DataSourceTransactionManager db1TransactionManager(@Qualifier("db1DataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean
@Primary
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
db2config配置(其他数据库)
注意:
1.虽然数据库不同,但是配置相同,只是其他数据库不需要添加@Primary注解;
2.bean的名字不能重复
import javax.sql.DataSource;
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.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 org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
/**
* postgresql 配置(无需@Primary)
*
* @author 荆世玉
* @date /2/26 9:07:16
* @description postgresql data source config
*/
@Configuration
//注入mapper
@MapperScan(basePackages = "mons.mapper.postgre.**", sqlSessionTemplateRef = "db2SqlSessionTemplate")
public class DataSource2Config {
@Bean
@ConfigurationProperties(prefix = "spring.datasource.db2")
public DataSource db2DataSource() {
return DataSourceBuilder.create().build();
}
@Bean
public SqlSessionFactory db2SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mappers/postgre/*.xml"));
return bean.getObject();
}
@Bean
public DataSourceTransactionManager db2TransactionManager(@Qualifier("db2DataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean
public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
事务处理
注入事务的时候需要标明对应数据库(主数据库可以不用设置)
如:db2的数据库的事务"
@Transactional(value = "db2TransactionManager")
mapper层
不同数据库的mapper文件不能载同一个包中,config在注入时会注入错误;
使用时,与单数据源时一致
@Select("select * from table_1 ")
public List all();
public List all2();
select * from table_1
[{"id1":1,"id2":23,"id3":2222},{"id1":2,"id2":2222,"id3":111}]
