SpringMVC配置双数据源，一个java项目同时连接两个数据库

SpringMVC配置双数据源，一个java项目同时连接两个数据库

2018年01月03日 10:15:30

阅读数：1946

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();
    }

}

 DatabaseContextHolder.class设置数据源的类

 

 

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();
    }
}

DataSourceInterceptor.class

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();
    }
}

 

文章标签： spring mvc数据库