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
1 <!-- Global JNDI resources 2 Documentation at /docs/jndi-resources-howto.html 3 --> 4 <GlobalNamingResources> 5 <!-- Editable user database that can also be used by 6 UserDatabaseRealm to authenticate users 7 --> 8 <Resource name="UserDatabase" auth="Container" 9 type="org.apache.catalina.UserDatabase" 10 description="User database that can be updated and saved" 11 factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 12 pathname="conf/tomcat-users.xml" /> 13 <Resource name="UserDatabase" auth="Container" 14 type="org.apache.catalina.UserDatabase" 15 description="User database that can be updated and saved" 16 factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 17 pathname="conf/tomcat-users.xml" /> 18 19 20 <Resource auth="Container" 21 description="DB Connection" 22 driverClass="oracle.jdbc.driver.OracleDriver" 23 maxPoolSize="20" 24 minPoolSize="5" 25 acquireIncrement="5" 26 maxIdleTime="300" 27 idleConnectionTestPeriod="60" 28 automaticTestTable="Test" 29 acquireRetryAttempts="30" 30 breakAfterAcquireFailure="true" 31 name="jdbc/ADbSource" 32 user="A" 33 password="A" 34 factory="org.apache.naming.factory.BeanFactory" 35 type="com.mchange.v2.c3p0.ComboPooledDataSource" 36 jdbcUrl="jdbc:oracle:thin:@ip1:port1:DBname1" /> 37 38 39 <Resource auth="Container" 40 description="DB Connection" 41 driverClass="oracle.jdbc.driver.OracleDriver" 42 maxPoolSize="20" 43 minPoolSize="5" 44 acquireIncrement="5" 45 maxIdleTime="300" 46 idleConnectionTestPeriod="60" 47 automaticTestTable="Test" 48 acquireRetryAttempts="30" 49 breakAfterAcquireFailure="true" 50 name="jdbc/BDbSource" 51 user="B" 52 password="B" 53 factory="org.apache.naming.factory.BeanFactory" 54 type="com.mchange.v2.c3p0.ComboPooledDataSource" 55 jdbcUrl="jdbc:oracle:thin:@ip2:post2:DBname2" /> 56 57 </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
1 <!-- The contents of this file will be loaded for each web application --> 2 <Context> 3 <!-- Default set of monitored resources. If one of these changes, the --> 4 <!-- web application will be reloaded. --> 5 <WatchedResource>WEB-INF/web.xml</WatchedResource> 6 <WatchedResource>${catalina.base}/conf/web.xml</WatchedResource> 7 <!-- Uncomment this to disable session persistence across Tomcat restarts --> 8 <!-- 9 <Manager pathname="" /> 10 --> 11 12 <ResourceLink name="jdbc/ADbSource" global="jdbc/ADbSource" type="javax.sql.DataSource"/> 13 <ResourceLink name="jdbc/BDbSource" global="jdbc/BDbSource" type="javax.sql.DataSource"/> 14 </Context>
③、在项目中对配置的数据源进行引用
1 adb.jndi.name=java:comp/env/jdbc/ADbSource 2 bdb.jndi.name=java:comp/env/jdbc/BDbSource 3 root.jndi.name=java:comp/env/jdbc/ADbSource 4 null.jndi.name=java:comp/env/jdbc/dataSourceDB