JNDI在本项目中的应用

一，在tomcat的context文件中做如下配置

 <?xml version="1.0" encoding="UTF-8"?> <Context>     <WatchedResource>WEB-INF/web.xml</WatchedResource> <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/ORG" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/> <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/WX-PORTAL" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>       <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>  <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>  <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>       <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>       <Resource acquireIncrement="2" auth="Container" driverClass="oracle.jdbc.driver.OracleDriver" factory="com..seashell.encrypt.C3p0BeanFactory" jdbcUrl="jdbc:oracle:thin:@ip地址:1530:billdb" maxPoolSize="5" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/>            <Resource acquireIncrement="2" auth="Container" driverClass="org.gjt.mm.mysql.Driver" factory="com..seashell.encrypt.C3p0BeanFactory" idleConnectionTestPeriod="3600" jdbcUrl="jdbc:mysql://ip地址:3306/b2b_portal?useUnicode=true&amp;characterEncoding=UTF-8" maxIdleTime="3600" maxPoolSize="30" minPoolSize="3" name="/JDBC/-" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/> <Resource acquireIncrement="2" auth="Container" driverClass="org.gjt.mm.mysql.Driver" factory="com..seashell.encrypt.C3p0BeanFactory" idleConnectionTestPeriod="3600" jdbcUrl="jdbc:mysql://ip地址:3306/appmobile?useUnicode=true&amp;characterEncoding=UTF-8" maxIdleTime="3600" maxPoolSize="30" minPoolSize="3" name="/JDBC/" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/> <Resource acquireIncrement="2" auth="Container" driverClass="org.gjt.mm.mysql.Driver" factory="com..seashell.encrypt.C3p0BeanFactory" idleConnectionTestPeriod="3600" jdbcUrl="jdbc:mysql://ip地址:3306/oss?useUnicode=true&amp;characterEncoding=UTF-8" maxIdleTime="3600" maxPoolSize="30" minPoolSize="3" name="/JDBC/OSS" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/> <Resource acquireIncrement="2" auth="Container" driverClass="org.gjt.mm.mysql.Driver" factory="com..seashell.encrypt.C3p0BeanFactory" idleConnectionTestPeriod="3600" jdbcUrl="jdbc:mysql://ip地址:3306/boss?useUnicode=true&amp;characterEncoding=UTF-8" maxIdleTime="3600" maxPoolSize="30" minPoolSize="3" name="/JDBC/ORG" password="" type="com.mchange.v2.c3p0.ComboPooledDataSource" user=""/> </Context>

二，在初始化的xml中进行配置，注意它要被写在web.xml中的扫描到。

例如：web.xml中的配置

 <context-param>         <param-name>contextConfigLocation</param-name>         <param-value>            classpath:context/*.xml,            classpath*:context/*.xml,            classpath*:context/ibatis/*.xml,         </param-value>     </context-param>

然后在在context的文件下建立一个xml文件，注意这里不一定非的和项目名字一样，随便写就行了。

 <?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:p="http://www.springframework.org/schema/p"     xmlns:context="http://www.springframework.org/schema/context"     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"     xsi:schemaLocation="             http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd             http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd             http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">     <bean id="mobileDS" class="org.springframework.jndi.JndiObjectFactoryBean">         <property name="jndiName" value="java:comp/env//JDBC/WX-PORTAL" />     </bean>     <bean id="bossDS" class="org.springframework.jndi.JndiObjectFactoryBean">         <property name="jndiName" value="java:comp/env/JDBC/ORG" />     </bean>     <!-- b2b-portal 数据源配置 -->     <bean id="dataSource" class="com..boss.ds.util.DynamicDataSource" >         <property name="targetDataSources">             <map key-type="java.lang.String">                 <entry key="appmobile" value-ref="mobileDS" ></entry>                 <entry key="org" value-ref="bossDS" ></entry>             </map>         </property>     </bean>     <!--事务管理器 -->     <bean id="transactionManager"         class="org.springframework.jdbc.datasource.DataSourceTransactionManager"         p:dataSource-ref="dataSource"/>     <aop:config>         <aop:advisor pointcut="execution(* com..*.service..*Service.*(..))"             advice-ref="txAdvice" order="1" />     </aop:config>     <tx:advice id="txAdvice" transaction-manager="transactionManager">         <tx:attributes>             <tx:method name="save*" propagation="REQUIRED" />             <tx:method name="update*" propagation="REQUIRED" />             <tx:method name="del*" propagation="REQUIRED" />             <tx:method name="change*" propagation="REQUIRED" />             <tx:method name="create*" propagation="REQUIRED" />         </tx:attributes>     </tx:advice>   </beans>

这样就可以随意的切换数据源了。