配置多数据源的三种方式(Spring boot + Bee)_java配置三个数据源

1. Java 配置方式

public class InitSameDsUtil {
	
	public static void initDS() {
		try {
 
			DruidDataSource dataSource0;
			dataSource0 = new DruidDataSource();
			dataSource0.setUrl("jdbc:mysql://localhost:3306/bee?characterEncoding=UTF-8&useSSL=false");
			dataSource0.setUsername("root");
			dataSource0.setPassword("123456");
			dataSource0.init();
 
			DruidDataSource dataSource1;
			dataSource1 = new DruidDataSource();
			dataSource1.setUrl("jdbc:mysql://localhost:3306/pro?characterEncoding=UTF-8&useSSL=false");
			dataSource1.setUsername("root");
			dataSource1.setPassword("123456");
			dataSource1.init();
 
//			以上数据源,也可以通过XML方式配置
//			(二十二)ORM框架Bee,Spring配置多数据源实例
//			https://blog.csdn.net/abckingaa/article/details/120956130
			Map<String, DataSource> dataSourceMap = new HashMap<>();
			dataSourceMap.put("ds0", dataSource0);
			dataSourceMap.put("ds1", dataSource1); 
//			BeeFactory.getInstance().setDataSourceMap(dataSourceMap);
			HoneyContext.setDataSourceMap(dataSourceMap);//V2.1
 
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
 
}

2. Spring xml配置方式

applicationContext.xml

原文: https://blog.csdn.net/abckingaa/article/details/120956130

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
 
<!--     ds1 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass" value="com.mysql.jdbc.Driver" />
		<property name="jdbcUrl"
			value="jdbc:mysql://localhost:3306/teasoft?characterEncoding=UTF-8" />
		<property name="user" value="root" />
		<property name="password" value="" />
		<property name="initialPoolSize" value="10" />
		<property name="minPoolSize" value="10" />
		<property name="maxPoolSize" value="20" />
		<property name="maxIdleTime" value="1800" />
	</bean>
	
	<bean id="ds2" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass" value="com.mysql.jdbc.Driver" />
		<property name="jdbcUrl"
			value="jdbc:mysql://localhost:3306/bee?characterEncoding=UTF-8" />
		<property name="user" value="root" />
		<property name="password" value="" />
		<property name="initialPoolSize" value="10" />
		<property name="minPoolSize" value="10" />
		<property name="maxPoolSize" value="20" />
		<property name="maxIdleTime" value="1800" />
	</bean>
 
<!-- 	<bean id="beeFactory" class="org.teasoft.honey.osql.core.BeeFactory">
		<property name="dataSource" ref="dataSource"></property>
	</bean> -->
 
	<bean id="beeFactory" class="org.teasoft.honey.osql.core.BeeFactory">
		<property name="dataSourceMap">
			<map>
				<entry key="ds1" value-ref="dataSource" />
				<entry key="ds2" value-ref="ds2" />
			</map>
		</property>
	</bean>
 
	<bean id="sessionFactory" class="org.teasoft.honey.osql.core.SessionFactory">
		<property name="beeFactory" ref="beeFactory"></property>
	</bean>
	
	<import resource="beeContext.xml"></import>
 
</beans>

3. 配置文件方式 

放在bee.properties, application.properties,application.yml三种文件都可以.

以下是bee.properties, application.properties的风格写法, 

application.yml 可以使用其相应的风格. 

#druid
#dbs数组,其它下标,是否从首个元素继承属性(但dsName不能继承)
bee.db.extendFirst=true
bee.db.dbs[0].dsName=ds0
bee.db.dbs[0].type=Druid
bee.db.dbs[0].driverName = com.mysql.jdbc.Driver
bee.db.dbs[0].url =jdbc:mysql://localhost:3306/bee?characterEncoding=UTF-8&useSSL=false
bee.db.dbs[0].username = root
bee.db.dbs[0].password =123456
bee.db.dbs[0].initialSize=10
bee.db.dbs[0].minIdle=10
bee.db.dbs[0].maxActive=50
bee.db.dbs[0].maxWait=60000
bee.db.dbs[0].timeBetweenEvictionRunsMillis=60000
 
bee.db.dbs[1].dsName=ds1
bee.db.dbs[1].type=Druid
bee.db.dbs[1].driverName = com.mysql.jdbc.Driver
bee.db.dbs[1].url =jdbc:mysql://localhost:3306/pro?characterEncoding=UTF-8&useSSL=false
bee.db.dbs[1].username = root
bee.db.dbs[1].password =123456

使用多数据源,  可以使用分库分表, 也可以只使用分库或只使用分表. 

还有可能就是为了从不同的数据库中获取数据,这些数据库还有可能同时有MySQL, Oracle, Mongodb等,折腾的是,还可能有MS Access这种数据库.

没事, Java ORM Bee都支持, 它还是个低代码的框架, 可以让你不用再写Dao代码.

setDataSourceName("ds0"); //就可以指定数据源

还可以通过包名, 表名规则路由到指定数据源.

Sharding分片的话, 只需要一句话,就可以完成分片. 有以下两种写法,与表名关系或与实现类关联.

数据源有ds0,ds1; test_user总共有6个表, ds0是test_user0,test_user1,test_user2,另外三个在ds1.分片键是id, 默认是根据id的值求余,余数的下标即可表的下标.

ShardingConfig.addShardingBean("test_user",new ShardingBean("ds[0..1].test_user[0..5]", "id"));
ShardingConfig.addShardingBean(TestMyUser.class,new ShardingBean("ds[0..1].test_my_user[0..5]", "id"));

Java ORM Bee   同时支持JDBC(比如JavaWeb),Android和Harmony；支持Sharding分片；支持多种关系型数据库(MySQL,MariaDB,Oracle,H2,SQLite,PostgreSQL,SQL Server,Access等)，还支持NoSQL的Cassandra,Mongodb等
 

源码下载:

https://github.com/automvc/bee

https://gitee.com/automvc/bee

https://gitee.com/automvc/bee-springboot
 

https://blog.csdn.net/abckingaa/article/details/121664398

ORM Bee资料大全(入门实例, 多数据源,整合Spring boot等)_abckingaa的博客-CSDN博客_orm bee