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

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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. <context:annotation-config />
25. <context:component-scan base-package="com"></context:component-scan>
26. <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
27. <property name="locations">
28. <list>
29. <value>classpath:com/resource/config.properties</value>
30. </list>
31. </property>
32. </bean>
33. <bean id="dataSourceOne" class="com.mchange.v2.c3p0.ComboPooledDataSource"
34. destroy-method="close">
35. <property name="driverClass" value="${dbOne.jdbc.driverClass}" />
36. <property name="jdbcUrl" value="${dbOne.jdbc.url}" />
37. <property name="user" value="${dbOne.jdbc.user}" />
38. <property name="password" value="${dbOne.jdbc.password}" />
39. <property name="initialPoolSize" value="${dbOne.jdbc.initialPoolSize}" />
40. <property name="minPoolSize" value="${dbOne.jdbc.minPoolSize}" />
41. <property name="maxPoolSize" value="${dbOne.jdbc.maxPoolSize}" />
42. </bean>
43. <bean id="dataSourceTwo" class="com.mchange.v2.c3p0.ComboPooledDataSource"
44. destroy-method="close">
45. <property name="driverClass" value="${dbTwo.jdbc.driverClass}" />
46. <property name="jdbcUrl" value="${dbTwo.jdbc.url}" />
47. <property name="user" value="${dbTwo.jdbc.user}" />
48. <property name="password" value="${dbTwo.jdbc.password}" />
49. <property name="initialPoolSize" value="${dbTwo.jdbc.initialPoolSize}" />
50. <property name="minPoolSize" value="${dbTwo.jdbc.minPoolSize}" />
51. <property name="maxPoolSize" value="${dbTwo.jdbc.maxPoolSize}" />
52. </bean>
53. <bean id="dynamicDataSource" class="com.core.DynamicDataSource">
54. <property name="targetDataSources">
55. <map key-type="java.lang.String">
56. <entry value-ref="dataSourceOne" key="dataSourceOne"></entry>
57. <entry value-ref="dataSourceTwo" key="dataSourceTwo"></entry>
58. </map>
59. </property>
60. <property name="defaultTargetDataSource" ref="dataSourceOne">
61. </property>
62. </bean>
63. <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
64. <property name="dataSource" ref="dynamicDataSource" />
65. <property name="hibernateProperties">
66. <props>
67. <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
68. <prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
69. <prop key="hibernate.show_sql">false</prop>
70. <prop key="hibernate.format_sql">true</prop>
71. <prop key="hbm2ddl.auto">create</prop>
72. </props>
73. </property>
74. <property name="packagesToScan">
75. <list>
76. <value>com.po</value>
77. </list>
78. </property>
79. </bean>
80. <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
81. <property name="sessionFactory" ref="sessionFactory" />
82. </bean>
83. <aop:config>
84. <aop:pointcut id="transactionPointCut" expression="execution(* com.dao..*.*(..))" />
85. <aop:advisor advice-ref="txAdvice" pointcut-ref="transactionPointCut" />
86. </aop:config>
87. <tx:advice id="txAdvice" transaction-manager="transactionManager">
88. <tx:attributes>
89. <tx:method name="add*" propagation="REQUIRED" />
90. <tx:method name="save*" propagation="REQUIRED" />
91. <tx:method name="update*" propagation="REQUIRED" />
92. <tx:method name="delete*" propagation="REQUIRED" />
93. <tx:method name="*" read-only="true" />
94. </tx:attributes>
95. </tx:advice>
96. <aop:config>
97. <aop:aspect id="dataSourceAspect" ref="dataSourceInterceptor">
98. <aop:pointcut id="daoOne" expression="execution(* com.dao.one.*.*(..))" />
99. <aop:pointcut id="daoTwo" expression="execution(* com.dao.two.*.*(..))" />
100. <aop:before pointcut-ref="daoOne" method="setdataSourceOne" />
101. <aop:before pointcut-ref="daoTwo" method="setdataSourceTwo" />
102. </aop:aspect>
103. </aop:config>
104. </beans>

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DynamicDataSource.class

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

DatabaseContextHolder.class设置数据源的类

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

DataSourceInterceptor.class

1. package com.core;
2. import org.aspectj.lang.JoinPoint;
3. import org.springframework.stereotype.Component;
4. @Component
5. public class DataSourceInterceptor {
6. <span style="white-space:pre;"> </span>//数据源1
7. public static final String SOURCE_PLAN = "dataSourceOne;
8. //数据源2
9. public static final String SOURCE_FUND = dataSourceTwo;

}

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springMVC数据源

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

jdbc_username=**jdbc_password=**

1. 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

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

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. public static void setDbType(String dbType) {
10. contextHolder.set(dbType);
11. }
12. public static String getDbType() {
13. return ((String) contextHolder.get());
14. }
15. public static void clearDbType() {
16. contextHolder.remove();
17. }
18. }

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