SpringMVC配置双数据源，一个java项目同时连接两个数据库

我就是我 2022-09-24 09:26 176阅读 0赞

数据源在配置文件中的配置

<pre name="code" class="java"><?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: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">
 
 	<context:annotation-config />
 
 	<context:component-scan base-package="com"></context:component-scan>
 
 	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
 		<property name="locations">
 			<list>
 				<value>classpath:com/resource/config.properties</value>
 			</list>
 		</property>
 	</bean>
 
 	<bean id="dataSourceOne" class="com.mchange.v2.c3p0.ComboPooledDataSource"
 		destroy-method="close">
 		<property name="driverClass" value="${dbOne.jdbc.driverClass}" />
 		<property name="jdbcUrl" value="${dbOne.jdbc.url}" />
 		<property name="user" value="${dbOne.jdbc.user}" />
 		<property name="password" value="${dbOne.jdbc.password}" />
 		<property name="initialPoolSize" value="${dbOne.jdbc.initialPoolSize}" />
 		<property name="minPoolSize" value="${dbOne.jdbc.minPoolSize}" />
 		<property name="maxPoolSize" value="${dbOne.jdbc.maxPoolSize}" />
 	</bean>
 
 	<bean id="dataSourceTwo" class="com.mchange.v2.c3p0.ComboPooledDataSource"
 		destroy-method="close">
 		<property name="driverClass" value="${dbTwo.jdbc.driverClass}" />
 		<property name="jdbcUrl" value="${dbTwo.jdbc.url}" />
 		<property name="user" value="${dbTwo.jdbc.user}" />
 		<property name="password" value="${dbTwo.jdbc.password}" />
 		<property name="initialPoolSize" value="${dbTwo.jdbc.initialPoolSize}" />
 		<property name="minPoolSize" value="${dbTwo.jdbc.minPoolSize}" />
 		<property name="maxPoolSize" value="${dbTwo.jdbc.maxPoolSize}" />
 	</bean>
 
 	<bean id="dynamicDataSource" class="com.core.DynamicDataSource">
 		<property name="targetDataSources">
 			<map key-type="java.lang.String">
 				<entry value-ref="dataSourceOne" key="dataSourceOne"></entry>
 				<entry value-ref="dataSourceTwo" key="dataSourceTwo"></entry>
 			</map>
 		</property>
 		<property name="defaultTargetDataSource" ref="dataSourceOne">
 		</property>
 	</bean>
 
 	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
 		<property name="dataSource" ref="dynamicDataSource" />
 		<property name="hibernateProperties">
 			<props>
 				<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
 				<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
 				<prop key="hibernate.show_sql">false</prop>
 				<prop key="hibernate.format_sql">true</prop>
 				<prop key="hbm2ddl.auto">create</prop>
 			</props>
 		</property>
 		<property name="packagesToScan">
 			<list>
 				<value>com.po</value>
 			</list>
 		</property>
 	</bean>
 
 	<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
 		<property name="sessionFactory" ref="sessionFactory" />
 	</bean>
 
 	<aop:config>
 		<aop:pointcut id="transactionPointCut" expression="execution(* com.dao..*.*(..))" />
 		<aop:advisor advice-ref="txAdvice" pointcut-ref="transactionPointCut" />
 	</aop:config>
 
 	<tx:advice id="txAdvice" transaction-manager="transactionManager">
 		<tx:attributes>
 			<tx:method name="add*" propagation="REQUIRED" />
 			<tx:method name="save*" propagation="REQUIRED" />
 			<tx:method name="update*" propagation="REQUIRED" />
 			<tx:method name="delete*" propagation="REQUIRED" />
 			<tx:method name="*" read-only="true" />
 		</tx:attributes>
 	</tx:advice>
 
 	<aop:config>
 		<aop:aspect id="dataSourceAspect" ref="dataSourceInterceptor">
 			<aop:pointcut id="daoOne" expression="execution(* com.dao.one.*.*(..))" />
 			<aop:pointcut id="daoTwo" expression="execution(* com.dao.two.*.*(..))" />
 			<aop:before pointcut-ref="daoOne" method="setdataSourceOne" />
 			<aop:before pointcut-ref="daoTwo" method="setdataSourceTwo" />
 		</aop:aspect>
 	</aop:config>
 </beans>

`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<String> contextHolder = new ThreadLocal<String>();
 	//设置要使用的数据源
 	public static void setCustomerType(String customerType) {
 		contextHolder.set(customerType);
 	}
 	//获取数据源
 	public static String getCustomerType() {
 		return contextHolder.get();
 	}
 	//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 {
    	//数据源1
    	public static final String SOURCE_PLAN = "dataSourceOne;
    	//数据源2
            public static final String SOURCE_FUND = dataSourceTwo;	//数据源1
    	public static final String SOURCE_PLAN = "dataSourceOne;
    	//数据源2
            public static final String SOURCE_FUND = dataSourceTwo;

\}springMVC数据源

jdbc_driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
    dataSourceOne=jdbc:sqlserver://115.29.***.**;DatabaseName=DB_GuiHua

jdbc\_username=\*\*jdbc\_password=\*\*

dataSourceTwo=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<String> contextHolder = new ThreadLocal<String>();
 
 	public static void setDbType(String dbType) {
 		contextHolder.set(dbType);
 	}
 
 	public static String getDbType() {
 		return ((String) contextHolder.get());
 	}
 
 	public static void clearDbType() {
 		contextHolder.remove();
 	}
 }

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