spring mvc + mybatis 连接同一地址的多个数据库

driver=com.mysql.jdbc.Driver
oldmysql.url=jdbc:mysql://localhost:3306/spider_changed?tinyInt1isBit=false
newmysql.url=jdbc:mysql://localhost:3306/db_hbrb_spider_async?tinyInt1isBit=false
username=root
password=root
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描 -->
<context:component-scan base-package="com.spiderweb">
</context:component-scan>
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:mysql.properties" />
</bean>

<bean id="dataSourceOld" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${oldmysql.url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<bean id="dataSourceNew" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${newmysql.url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<bean id="dataSource" class="com.spiderweb.common.DynamicDataSource"><!-- 这里写选择数据源的类地址 下面跟着给出-->
<property name="defaultTargetDataSource" ref="dataSourceOld"/><!-- 设置默认为此dataSourceOld数据源-->
<property name="targetDataSources">
<map>
<entry key="dataSourceOld" value-ref="dataSourceOld"/>
<entry key="dataSourceNew" value-ref="dataSourceNew"/>
</map>
</property>
</bean>
<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/spiderweb/mapping/*/*.xml"></property>
</bean>

<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.spiderweb.dao.mapper.*" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

</beans>

package com.spide
a3e1
rweb.common;

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

public class DbcontextHolder extends AbstractRoutingDataSource {

public static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();

/**
* 设置当前数据源
* @param dbType
*/
public static void setDbType(String dbType){
contextHolder.set(dbType);
}
/**
* 获得当前数据源
* @return
*/
public static String getDbType(){
String dbType = (String)contextHolder.get();
return dbType;
}
/**
*清除上下文
*
*/
public void clearContext(){
contextHolder.remove();
}
@Override
protected Object determineCurrentLookupKey() {
return DbcontextHolder.getDbType();
}
}

//连接dataSourceOld进行查询
DbcontextHolder.setDbType("dataSourceOld");
Template template = templateMapperExtend.selectByPrimaryKey(templateId);
//连接dataSourceNew进行插入
DbcontextHolder.setDbType("dataSourceNew");
siteAsyncMapper.insertSelective(siteAsync);