hibernate：
1.配置多个数据源，比如2个：hibernate.cfg1.xml~hibernate.cfg8.xml
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="dialect">com.standsoft.dialect.DialectForInkfish</property>
<property name="connection.url">jdbc:sqlserver://localhost:1433;DatabaseName=zhangyanandb</property>
<property name="connection.username">sa</property>
<property name="connection.password">111111</property>
<property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
<property name="myeclipse.connection.profile">sql2008-4</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<mapping resource="com/standsoft/DictArea.hbm.xml" />
</session-factory>
</hibernate-configuration>
2.配置两个sessionfactory
package com.orm; import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration; /**
* Configures and provides access to Hibernate sessions, tied to the current
* thread of execution. Follows the Thread Local Session pattern, see
* {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory1{ /**
* Location of hibernate.cfg.xml file. Location should be on the classpath
* as Hibernate uses #resourceAsStream style lookup for its configuration
* file. The default classpath location of the hibernate config file is in
* the default package. Use #setConfigFile() to update the location of the
* configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg1.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
} private HibernateSessionFactory1() {
} /**
* Returns the ThreadLocal Session instance. Lazy initialize the
* <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException {
Session session = threadLocal.get(); if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession() : null;
threadLocal.set(session);
} return session;
} /**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
} /**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session session = threadLocal.get();
threadLocal.set(null); if (session != null) {
session.close();
}
} /**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
} /**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) {
HibernateSessionFactory1.configFile = configFile;
sessionFactory = null;
} /**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() {
return configuration;
} }
3.配置调度类sessionfactory
package com.orm; import org.hibernate.HibernateException;
import org.hibernate.Session; /**
* Configures and provides access to Hibernate sessions, tied to the current
* thread of execution. Follows the Thread Local Session pattern, see
* {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory {
public static Session currentSession; public static Session getCurrentSession() {
return currentSession;
} public static void setCurrentSession(Session currentSession) {
HibernateSessionFactory.currentSession = currentSession;
} public static Session getSession() throws HibernateException {
return currentSession;
}
}
4.参考http://www.cnblogs.com/yanan7890/p/8681566.html切换数据源
HibernateSessionFactory.setCurrentSession(HibernateSessionFactory1.getSession());
HibernateSessionFactory.setCurrentSession(HibernateSessionFactory2.getSession());
以上就是纯hibernate的多数据源配置操作，已验证可以使用。但觉得哪儿有问题，也没测出来，希望大佬指正
ssm：
1.配置多个数据源，比如2个：resource/db.properties
jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
jdbc.url=jdbc:sqlserver://localhost:1433; DatabaseName=zhangyanandb
jdbc.username=sa
jdbc.password=11111 jdbc2.url=jdbc:sqlserver://localhost:1433; DatabaseName=zhangyanandb2
jdbc2.username=sa
jdbc2.password=11111
2.交给spring管理两个数据库连接
<!-- 数据库连接池 -->
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:resource/db.properties" />
<!-- 数据库连接池 -->
<bean id="dataSource1" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="maxActive" value="10" />
<property name="minIdle" value="5" />
</bean> <!-- 数据库连接池 -->
<bean id="dataSource2" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="${jdbc2.url}" />
<property name="username" value="${jdbc2.username}" />
<property name="password" value="${jdbc2.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="maxActive" value="10" />
<property name="minIdle" value="5" />
</bean> <!-- 动态数据源 -->
<bean id="dynamicDataSource" class="util.DynamicDataSource">
<property name="targetDataSources">
<map key-type="java.lang.String">
<!-- 指定lookupKey和与之对应的数据源 -->
<entry key="dataSource1" value-ref="dataSource1"></entry>
<entry key="dataSource2" value-ref="dataSource2"></entry>
</map>
</property>
<!-- 这里可以指定默认的数据源 -->
<property name="defaultTargetDataSource" ref="dataSource1" />
</bean>
3.spring配置sessionfactory
<!-- 配置sqlsessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
<property name="configLocation" value="classpath:resource/SqlMapConfig.xml"></property>
<property name="dataSource" ref="dynamicDataSource"></property>
</bean>
4.配置事物
<!-- 事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 数据源 -->
<property name="dataSource" ref="dynamicDataSource" />
</bean>
<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 传播行为 -->
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="create*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
</tx:attributes>
</tx:advice>
5.配置DynamicDataSource类及DynamicDataSourceHolder类供选择调用
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
public class DynamicDataSource extends AbstractRoutingDataSource {
/**
* 该方法返回需要使用的DataSource的key值，
* 然后根据这个key从resolvedDataSources这个map里取出对应的DataSource，
* 如果找不到，则用默认的resolvedDefaultDataSource。
*/
@Override
protected Object determineCurrentLookupKey() {
// 从自定义的位置获取数据源标识
return DynamicDataSourceHolder.getDataSource();
}
}
public class DynamicDataSourceHolder {
/**
* 注意：数据源标识保存在线程变量中，避免多线程操作数据源时互相干扰
*/
private static final ThreadLocal<String> THREAD_DATA_SOURCE = new ThreadLocal<String>();
public static String getDataSource() {
return THREAD_DATA_SOURCE.get();
}
public static void setDataSource(String dataSource) {
THREAD_DATA_SOURCE.set(dataSource);
}
public static void clearDataSource() {
THREAD_DATA_SOURCE.remove();
}
}
6切换数据源
DynamicDataSourceHolder.setDataSource("dataSource1");
DynamicDataSourceHolder.setDataSource("dataSource2");