Tomcat8.0配置JNDI多数据源

jndi配置 ：此种配置需要在Tomcat的server.xml中和context.xml中配置数据源，在项目中引用。

需要在tomcat下加入数据库连接的jar包,相关包（ojdbc14;c3p0数据源）

① 、找到Tomcat的server.xml中GlobalNamingResources节点,在节点下加一个全局数据源

 <!-- Global JNDI resources
        Documentation at /docs/jndi-resources-howto.html
   -->
   <GlobalNamingResources>
     <!-- Editable user database that can also be used by
          UserDatabaseRealm to authenticate users
     -->
     <Resource name="UserDatabase" auth="Container"
               type="org.apache.catalina.UserDatabase"
               description="User database that can be updated and saved"
               factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
               pathname="conf/tomcat-users.xml" />
 <Resource name="UserDatabase" auth="Container"
               type="org.apache.catalina.UserDatabase"
               description="User database that can be updated and saved"
               factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
               pathname="conf/tomcat-users.xml" />

 <Resource auth="Container"
              description="DB Connection"
              driverClass="oracle.jdbc.driver.OracleDriver"
              maxPoolSize="20"
              minPoolSize="5"
              acquireIncrement="5"
              maxIdleTime="300"
              idleConnectionTestPeriod="60"
              automaticTestTable="Test"
              acquireRetryAttempts="30"
              breakAfterAcquireFailure="true"
              name="jdbc/ADbSource"
              user="A"
              password="A"
              factory="org.apache.naming.factory.BeanFactory"
              type="com.mchange.v2.c3p0.ComboPooledDataSource"
              jdbcUrl="jdbc:oracle:thin:@ip1:port1:DBname1" />

 <Resource auth="Container"
              description="DB Connection"
              driverClass="oracle.jdbc.driver.OracleDriver"
              maxPoolSize="20"
              minPoolSize="5"
              acquireIncrement="5"
              maxIdleTime="300"
              idleConnectionTestPeriod="60"
              automaticTestTable="Test"
              acquireRetryAttempts="30"
              breakAfterAcquireFailure="true"
              name="jdbc/BDbSource"
              user="B"
              password="B"
              factory="org.apache.naming.factory.BeanFactory"
              type="com.mchange.v2.c3p0.ComboPooledDataSource"
              jdbcUrl="jdbc:oracle:thin:@ip2:post2:DBname2" />

   </GlobalNamingResources>

②、找到Tomcat的context.xml,在Context节点下加一个ResourceLink节点对第一步配置的数据源进行引用

 <!-- The contents of this file will be loaded for each web application -->
 <Context>
     <!-- Default set of monitored resources. If one of these changes, the    -->
     <!-- web application will be reloaded.                                   -->
     <WatchedResource>WEB-INF/web.xml</WatchedResource>
     <WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
     <!-- Uncomment this to disable session persistence across Tomcat restarts -->
     <!--
     <Manager pathname="" />
     -->

 <ResourceLink name="jdbc/ADbSource" global="jdbc/ADbSource" type="javax.sql.DataSource"/>
 <ResourceLink name="jdbc/BDbSource" global="jdbc/BDbSource" type="javax.sql.DataSource"/>
 </Context>

③、在项目中对配置的数据源进行引用

 adb.jndi.name=java\:comp/env/jdbc/ADbSource
 bdb.jndi.name=java\:comp/env/jdbc/BDbSource
 root.jndi.name=java\:comp/env/jdbc/ADbSource
 null.jndi.name=java\:comp/env/jdbc/dataSourceDB