SpringMVC配置双数据源，一个java项目同时连接两个数据库

数据源在配置文件中的配置

 "code" class="java">"1.0" encoding="UTF-8"?>
 "http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
     xmlns:cache="http://www.springframework.org/schema/cache"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
     xmlns:jms="http://www.springframework.org/schema/jms" xmlns:lang="http://www.springframework.org/schema/lang"
     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:oxm="http://www.springframework.org/schema/oxm"
     xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task"
     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
     http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-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/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
     http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd
     http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-3.1.xsd
     http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.1.xsd
     http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
     http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.1.xsd
     http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd">



     package="com">

     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
         "locations">

                 classpath:com/resource/config.properties




     "dataSourceOne" class="com.mchange.v2.c3p0.ComboPooledDataSource"
         destroy-method="close">
         "driverClass" value="${dbOne.jdbc.driverClass}" />
         "jdbcUrl" value="${dbOne.jdbc.url}" />
         "user" value="${dbOne.jdbc.user}" />
         "password" value="${dbOne.jdbc.password}" />
         "initialPoolSize" value="${dbOne.jdbc.initialPoolSize}" />
         "minPoolSize" value="${dbOne.jdbc.minPoolSize}" />
         "maxPoolSize" value="${dbOne.jdbc.maxPoolSize}" />


     "dataSourceTwo" class="com.mchange.v2.c3p0.ComboPooledDataSource"
         destroy-method="close">
         "driverClass" value="${dbTwo.jdbc.driverClass}" />
         "jdbcUrl" value="${dbTwo.jdbc.url}" />
         "user" value="${dbTwo.jdbc.user}" />
         "password" value="${dbTwo.jdbc.password}" />
         "initialPoolSize" value="${dbTwo.jdbc.initialPoolSize}" />
         "minPoolSize" value="${dbTwo.jdbc.minPoolSize}" />
         "maxPoolSize" value="${dbTwo.jdbc.maxPoolSize}" />


     "dynamicDataSource" class="com.core.DynamicDataSource">
         "targetDataSources">
             "java.lang.String">
                 "dataSourceOne" key="dataSourceOne">
                 "dataSourceTwo" key="dataSourceTwo">


         "defaultTargetDataSource" ref="dataSourceOne">



     "sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
         "dataSource" ref="dynamicDataSource" />
         "hibernateProperties">

                 "hibernate.dialect">org.hibernate.dialect.MySQLDialect
                 "hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext
                 "hibernate.show_sql">false
                 "hibernate.format_sql">true
                 "hbm2ddl.auto">create


         "packagesToScan">

                 com.po




     "transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
         "sessionFactory" ref="sessionFactory" />



         "transactionPointCut" expression="execution(* com.dao..*.*(..))" />
         "txAdvice" pointcut-ref="transactionPointCut" />


     "txAdvice" transaction-manager="transactionManager">

             "add*" propagation="REQUIRED" />
             "save*" propagation="REQUIRED" />
             "update*" propagation="REQUIRED" />
             "delete*" propagation="REQUIRED" />
             "*" read-only="true" />




         "dataSourceAspect" ref="dataSourceInterceptor">
             "daoOne" expression="execution(* com.dao.one.*.*(..))" />
             "daoTwo" expression="execution(* com.dao.two.*.*(..))" />
             "daoOne" method="setdataSourceOne" />
             "daoTwo" method="setdataSourceTwo" />

DynamicDataSource.class

 package com.core;

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

 public class DynamicDataSource extends AbstractRoutingDataSource{

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

 }

 DatabaseContextHolder.class设置数据源的类

 package com.core;

 public class DatabaseContextHolder {

     private static final ThreadLocal contextHolder = new ThreadLocal();
 "white-space:pre">    //设置要使用的数据源
     public static void setCustomerType(String customerType) {
         contextHolder.set(customerType);
     }
 "white-space:pre">    //获取数据源
     public static String getCustomerType() {
         return contextHolder.get();
     }
 "white-space:pre">    //清除数据源，使用默认的数据源
     public static void clearCustomerType() {
         contextHolder.remove();
     }
 }

DataSourceInterceptor.class

 package com.core;

 import org.aspectj.lang.JoinPoint;
 import org.springframework.stereotype.Component;

 @Component
 public class DataSourceInterceptor {
 "white-space:pre">    //数据源1
     public static final String SOURCE_PLAN = "font-family: Arial, Helvetica, sans-serif;">dataSourceOnefont-family: Arial, Helvetica, sans-serif;">";
     //数据源2
 "code" class="java">"white-space:pre">    public static final String SOURCE_FUND = "font-family: Arial, Helvetica, sans-serif;">dataSourceTwo";

}

springMVC数据源

 jdbc_driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
 <pre name="code" class="java">dataSourceOne<span style="font-family: Arial, Helvetica, sans-serif;">=jdbc:sqlserver://115.29.***.**;DatabaseName=DB_GuiHuaspan>

jdbc_username=**jdbc_password=**

 dataSourceTwo"font-family: Arial, Helvetica, sans-serif;">=jdbc:sqlserver://115.29.***.*;DatabaseName=DB_Fund

Spring MVC会默认有一个数据源，当需要更换数据源时，要在调用事务之前配置

 DataSourceContextHolder.setDbType(DataSourceType.SOURCE_FUND);//更换数据源

 /**
  * @ClassName: DataSourceContextHolder
  * @Description: 数据库切换工具类
  * @author: wzx
  * @date: 2016-07-27 上午10:26:01
  */
 public class DataSourceContextHolder {
     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();
     }
 }