從Tomcat投射JDBC JNDI數據源-ComboPooledDataSource

Question

有人可以請我擺脫苦難，並解釋為什么會發生這種情況以及如何解決它。

1. 一個tomcat數據源

    <Resource name="MY_JDBC_NAME" auth="Container" driverClass="oracle.jdbc.OracleDriver" jdbcUrl="MyURL" user="MyUser" password="MyPassword" factory="org.apache.naming.factory.BeanFactory" type="com.mchange.v2.c3p0.ComboPooledDataSource" maxPoolSize="25" minPoolSize="5" acquireIncrement="1" acquireRetryAttempts = "2" idleConnectionTestPeriod = "60" testConnectionOnCheckout = "true" preferredTestQuery = "SELECT 1 FROM DUAL" 

   />

2. 查找

    ComboPooledDataSource ds = (ComboPooledDataSource) ctx.lookup( "java:comp/env/MY_JNDI_NAME"); 

這導致莫名其妙

java.lang.ClassCastException: com.mchange.v2.c3p0.ComboPooledDataSource cannot be cast to com.mchange.v2.c3p0.ComboPooledDataSource

提前致謝

Answer 1

我正在使用它，也許它也可以完美地為您工作，嘗試一下，

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

....

Context initContext = new InitialContext();
Context envContext = (Context) initContext.lookup("java:comp/env");
DataSource ds = (DataSource) envContext.lookup("MY_JDBC_NAME");