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
原文见: https://blog.csdn.net/qq_33384065/article/details/78958355
- <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();
- }
- }
- package com.core;
- public class DatabaseContextHolder {
- private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();
- <span style=”white-space:pre”> </span>//设置要使用的数据源
- public static void setCustomerType(String customerType) {
- contextHolder.set(customerType);
- }
- <span style=”white-space:pre”> </span>//获取数据源
- public static String getCustomerType() {
- return contextHolder.get();
- }
- <span style=”white-space:pre”> </span>//清除数据源,使用默认的数据源
- public static void clearCustomerType() {
- contextHolder.remove();
- }
- }
- package com.core;
- import org.aspectj.lang.JoinPoint;
- import org.springframework.stereotype.Component;
- @Component
- public class DataSourceInterceptor {
- <span style=”white-space:pre”> </span>//数据源1
- public static final String SOURCE_PLAN = “<span style=”font-family: Arial, Helvetica, sans-serif;“>dataSourceOne</span><span style=”font-family: Arial, Helvetica, sans-serif;“>”;</span>
- //数据源2
- <pre name=”code” class=“java”><span style=“white-space:pre”> </span>public static final String SOURCE_FUND = “<span style=”font-family: Arial, Helvetica, sans-serif;“>dataSourceTwo</span>”;
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_GuiHua</span>
jdbc_username=jdbc_password=
- dataSourceTwo<span style=“font-family: Arial, Helvetica, sans-serif;”>=jdbc:sqlserver://115.29.***.*;DatabaseName=DB_Fund</span>
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();
- }
- }