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

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1. <pre name=“code” class=“java”><?xml version=“1.0” encoding=“UTF-8”?>  
2. <beans xmlns=”http://www.springframework.org/schema/beans”  
3.     xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:aop=“http://www.springframework.org/schema/aop”  
4.     xmlns:cache=”http://www.springframework.org/schema/cache”  
5.     xmlns:context=”http://www.springframework.org/schema/context”  
6.     xmlns:jdbc=”http://www.springframework.org/schema/jdbc” xmlns:jee=“http://www.springframework.org/schema/jee”  
7.     xmlns:jms=”http://www.springframework.org/schema/jms” xmlns:lang=“http://www.springframework.org/schema/lang”  
8.     xmlns:mvc=”http://www.springframework.org/schema/mvc” xmlns:oxm=“http://www.springframework.org/schema/oxm”  
9.     xmlns:p=”http://www.springframework.org/schema/p” xmlns:task=“http://www.springframework.org/schema/task”  
10.     xmlns:tx=”http://www.springframework.org/schema/tx” xmlns:util=“http://www.springframework.org/schema/util”  
11.     xsi:schemaLocation=”http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd    
12.     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd    
13.     http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.1.xsd    
14.     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd    
15.     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd    
16.     http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd    
17.     http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-3.1.xsd    
18.     http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.1.xsd    
19.     http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd    
20.     http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.1.xsd    
21.     http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd    
22.     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd    
23.     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd”>  
24.   
25.     <context:annotation-config />  
26.   
27.     <context:component-scan base-package=“com”></context:component-scan>  
28.   
29.     <bean class=“org.springframework.beans.factory.config.PropertyPlaceholderConfigurer”>  
30.         <property name=”locations”>  
31.             <list>  
32.                 <value>classpath:com/resource/config.properties</value>  
33.             </list>  
34.         </property>  
35.     </bean>  
36.   
37.     <bean id=”dataSourceOne” class=“com.mchange.v2.c3p0.ComboPooledDataSource”  
38.         destroy-method=”close”>  
39.         <property name=”driverClass” value=“${dbOne.jdbc.driverClass}” />  
40.         <property name=”jdbcUrl” value=“${dbOne.jdbc.url}” />  
41.         <property name=”user” value=“${dbOne.jdbc.user}” />  
42.         <property name=”password” value=“${dbOne.jdbc.password}” />  
43.         <property name=”initialPoolSize” value=“${dbOne.jdbc.initialPoolSize}” />  
44.         <property name=”minPoolSize” value=“${dbOne.jdbc.minPoolSize}” />  
45.         <property name=”maxPoolSize” value=“${dbOne.jdbc.maxPoolSize}” />  
46.     </bean>  
47.   
48.     <bean id=”dataSourceTwo” class=“com.mchange.v2.c3p0.ComboPooledDataSource”  
49.         destroy-method=”close”>  
50.         <property name=”driverClass” value=“${dbTwo.jdbc.driverClass}” />  
51.         <property name=”jdbcUrl” value=“${dbTwo.jdbc.url}” />  
52.         <property name=”user” value=“${dbTwo.jdbc.user}” />  
53.         <property name=”password” value=“${dbTwo.jdbc.password}” />  
54.         <property name=”initialPoolSize” value=“${dbTwo.jdbc.initialPoolSize}” />  
55.         <property name=”minPoolSize” value=“${dbTwo.jdbc.minPoolSize}” />  
56.         <property name=”maxPoolSize” value=“${dbTwo.jdbc.maxPoolSize}” />  
57.     </bean>  
58.   
59.     <bean id=”dynamicDataSource” class=“com.core.DynamicDataSource”>  
60.         <property name=”targetDataSources”>  
61.             <map key-type=”java.lang.String”>  
62.                 <entry value-ref=”dataSourceOne” key=“dataSourceOne”></entry>  
63.                 <entry value-ref=”dataSourceTwo” key=“dataSourceTwo”></entry>  
64.             </map>  
65.         </property>  
66.         <property name=”defaultTargetDataSource” ref=“dataSourceOne”>  
67.         </property>  
68.     </bean>  
69.   
70.     <bean id=”sessionFactory” class=“org.springframework.orm.hibernate4.LocalSessionFactoryBean”>  
71.         <property name=”dataSource” ref=“dynamicDataSource” />  
72.         <property name=”hibernateProperties”>  
73.             <props>  
74.                 <prop key=”hibernate.dialect”>org.hibernate.dialect.MySQLDialect</prop>  
75.                 <prop key=”hibernate.current_session_context_class”>org.springframework.orm.hibernate4.SpringSessionContext</prop>  
76.                 <prop key=”hibernate.show_sql”>false</prop>  
77.                 <prop key=”hibernate.format_sql”>true</prop>  
78.                 <prop key=”hbm2ddl.auto”>create</prop>  
79.             </props>  
80.         </property>  
81.         <property name=”packagesToScan”>  
82.             <list>  
83.                 <value>com.po</value>  
84.             </list>  
85.         </property>  
86.     </bean>  
87.   
88.     <bean id=”transactionManager” class=“org.springframework.orm.hibernate4.HibernateTransactionManager”>  
89.         <property name=”sessionFactory” ref=“sessionFactory” />  
90.     </bean>  
91.   
92.     <aop:config>  
93.         <aop:pointcut id=”transactionPointCut” expression=“execution(* com.dao..*.*(..))” />  
94.         <aop:advisor advice-ref=”txAdvice” pointcut-ref=“transactionPointCut” />  
95.     </aop:config>  
96.   
97.     <tx:advice id=”txAdvice” transaction-manager=“transactionManager”>  
98.         <tx:attributes>  
99.             <tx:method name=”add*” propagation=“REQUIRED” />  
100.             <tx:method name=”save*” propagation=“REQUIRED” />  
101.             <tx:method name=”update*” propagation=“REQUIRED” />  
102.             <tx:method name=”delete*” propagation=“REQUIRED” />  
103.             <tx:method name=”*” read-only=“true” />  
104.         </tx:attributes>  
105.     </tx:advice>  
106.   
107.     <aop:config>  
108.         <aop:aspect id=”dataSourceAspect” ref=“dataSourceInterceptor”>  
109.             <aop:pointcut id=”daoOne” expression=“execution(* com.dao.one.*.*(..))” />  
110.             <aop:pointcut id=”daoTwo” expression=“execution(* com.dao.two.*.*(..))” />  
111.             <aop:before pointcut-ref=”daoOne” method=“setdataSourceOne” />  
112.             <aop:before pointcut-ref=”daoTwo” method=“setdataSourceTwo” />  
113.         </aop:aspect>  
114.     </aop:config>  
115. </beans>  

DynamicDataSource.class

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1. package com.core;  
2.   
3. import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;  
4.   
5. public class DynamicDataSource extends AbstractRoutingDataSource{  
6.   
7.     @Override  
8.     protected Object determineCurrentLookupKey() {  
9.         return DatabaseContextHolder.getCustomerType();   
10.     }  
11.   
12. }  

 DatabaseContextHolder.class设置数据源的类

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1. package com.core;  
2.   
3. public class DatabaseContextHolder {  
4.   
5.     private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();  
6. <span style=”white-space:pre”>    </span>//设置要使用的数据源  
7.     public static void setCustomerType(String customerType) {  
8.         contextHolder.set(customerType);  
9.     }  
10. <span style=”white-space:pre”>    </span>//获取数据源  
11.     public static String getCustomerType() {  
12.         return contextHolder.get();  
13.     }  
14. <span style=”white-space:pre”>    </span>//清除数据源，使用默认的数据源  
15.     public static void clearCustomerType() {  
16.         contextHolder.remove();  
17.     }  
18. }  

DataSourceInterceptor.class

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1. package com.core;  
2.   
3. import org.aspectj.lang.JoinPoint;  
4. import org.springframework.stereotype.Component;  
5.   
6. @Component  
7. public class DataSourceInterceptor {  
8. <span style=”white-space:pre”>    </span>//数据源1  
9.     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>  
10.     //数据源2  
11. <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

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1. jdbc_driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver  
2. <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=

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1. 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

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

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1. /** 
2.  * @ClassName: DataSourceContextHolder 
3.  * @Description: 数据库切换工具类 
4.  * @author: wzx 
5.  * @date: 2016-07-27 上午10:26:01 
6.  */  
7. public class DataSourceContextHolder {  
8.     private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();  
9.   
10.     public static void setDbType(String dbType) {  
11.         contextHolder.set(dbType);  
12.     }  
13.   
14.     public static String getDbType() {  
15.         return ((String) contextHolder.get());  
16.     }  
17.   
18.     public static void clearDbType() {  
19.         contextHolder.remove();  
20.     }  
21. }  

文章标签： spring mvc数据库