怎么在spring配置多个数据源

如何在spring配置多个数据源
小弟刚开始学习spring方面的内容，遇到一个问题，我在一个项目中涉及到很多的数据库，想在spring中配置多个数据源如何操作呢。我的配置文件是这样的 在我的application.properties 有

Java code

jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost/test?useUnicode=true&characterEncoding=utf-8jdbc.url1=jdbc:mysql://localhost/test1?useUnicode=true&characterEncoding=utf-8jdbc.username=rootjdbc.password=123456hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

每当一个多一个数据库 我就在这个配置文件添加一个jdbc.url 命名为jdbc.url加一个数字名
在applicationContent.xml中

Java code

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">        <!-- Connection Info -->        <property name="driverClassName" value="${jdbc.driver}" />        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />        <!-- Connection Pooling Info -->        <property name="initialSize" value="5" />        <property name="maxActive" value="100" />        <property name="maxIdle" value="30" />        <property name="maxWait" value="1000" />        <property name="poolPreparedStatements" value="false" />        <property name="defaultAutoCommit" value="false" />        </bean>

这样设置。
这里<property name="url" value="${jdbc.url}" /> property name="url" 如何根据程序传递一个datasource标识去动态的获取url的value值呢。如何设置默认的动态url连接呢。请赐教！


[解决办法]
给你一个我们用的：
context.xml
<?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:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-2.0.xsd">


<jee:jndi-lookup id="mysqlds" jndi-name="java:comp/env/jdbc/mysqlds" />
<jee:jndi-lookup id="orads" jndi-name="java:comp/env/jdbc/orads" />


<bean id="dataSource" class="util.DynamicDataSource">
<property name="targetDataSources">
<map key-type="java.lang.String">
<entry key="0" value-ref="mysqlds" />
<entry key="1" value-ref="orads" />
</map>
</property>
<property name="defaultTargetDataSource" ref="orads" />
</bean>
</beans>


package util;

public class DbContextHolder {
private static final ThreadLocal contextHolder = new ThreadLocal();

public static void setDbType(String dbType) {
contextHolder.set(dbType);
}

public static String getDbType() {
return (String) contextHolder.get();
}

public static void clearDbType() {
contextHolder.remove();
}
}


package util;

import java.sql.SQLException;

import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class DynamicDataSource extends AbstractRoutingDataSource {
//static Logger log = Logger.getLogger("DynamicDataSource");
@Override
protected Object determineCurrentLookupKey() {
// TODO
return DbContextHolder.getDbType();
}

@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
// TODO Auto-generated method stub
return false;
}

@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
// TODO Auto-generated method stub
return null;
}


}


测试程序：

DbContextHolder.setDbType("1");
UserDomain od = this.testService.queryUserAccount("admin");
System.out.println("username=="+od.getName());


DbContextHolder.setDbType("0"); 
d = this.testService.queryUserAccount("admin");

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