springmvc+mybatis双数据源配置三步走战略

使用Spring提供的AbstractRoutingDataSource类来根据请求路由到不同的数据源。具体做法是先设置两个不同的dataSource代表不同的数据源，再建一个总的dynamicDataSource，根据不同的请求去设置dynamicDataSource。代码如下：

application.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
   <context:property-placeholder location="classpath*:db.properties"/>
   <bean id="dataSourceOne" class="org.apache.commons.dbcp.BasicDataSource">
       <property name="driverClassName" value="${driver}"></property>
       <property name="url" value="${url}"></property>
       <property name="username" value="${username}"/>
       <property name="password" value="${password}"/>
</bean>

创建DataSourceContextHolder.java

package com.rsb.util;

import com.mysql.jdbc.StringUtils;

public class DataSourceContextHolder {

   public static final String DATA_SOURCE_MYSQL = "dataSourceOne";
public static final String DATA_SOURCE_MSSQL = "dataSourceTwo";
   private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();

   public static void setCustomerType(String customertype){
       contextHolder.set(customertype);
   }

   public static String getCustomerType(){
       String dataSource = contextHolder.get();
       if (StringUtils.isNullOrEmpty(dataSource)) {
return DATA_SOURCE_MYSQL;
}else {
return dataSource;
}
   }

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

创建DynamicDataSource.java

package com.rsb.util;

import java.sql.SQLFeatureNotSupportedException;
import java.util.logging.Logger;

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

public class DynamicDataSource extends AbstractRoutingDataSource{

   @Override
   protected Object determineCurrentLookupKey() {
       return DataSourceContextHolder.getCustomerType();
   }

   public Logger getParentLogger() throws SQLFeatureNotSupportedException {
       return null;
   }

}
配置完成，用法

ModelBizImpl.java

DataSourceContextHolder.setCustomerType(DataSourceContextHolder.DATA_SOURCE_MSSQ);

springmvc+mybatis双数据源配置三步走战略

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