用Tomcat，最担心的就是配置JNDI的DataSource的时候出现问题，随着各大厂商发布自己的JDBC的实现，兼容性的问题也就越来也突出了...
一般我们都是用Tomcat自带的DBCP来处理，配置如下：
Resource name="jdbc/MyDS" auth="Container" type="javax.sql.DataSource" /
ResourceParams name="jdbc/MyDS"
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
namedriverName/name
valuejdbc:oracle:thin:@server:port:sid/value
/parameter
parameter
nameuser/name
value########/value
/parameter
parameter
namepassword/name
value########/value
/parameter
/ResourceParams
Oracle JDBC Driver for JDK 1.4 or JDK 1.5
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/htdocs/jdbc_10201.html
不过这个写法，如果在JBuilderX中，跑Tomcat 4.1，加上最新版的 Oracle JDBC Driver会存在问题，系统抛出的错误为：
javax.naming.NamingException: Cannot create resource instance
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:189)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:301)
at org.apache.naming.NamingContext.lookup(NamingContext.java:834)
at org.apache.naming.NamingContext.lookup(NamingContext.java:181)
at org.apache.naming.NamingContext.lookup(NamingContext.java:822)
at org.apache.naming.NamingContext.lookup(NamingContext.java:181)
at org.apache.naming.NamingContext.lookup(NamingContext.java:822)
at org.apache.naming.NamingContext.lookup(NamingContext.java:181)
at org.apache.naming.NamingContext.lookup(NamingContext.java:822)
at org.apache.naming.NamingContext.lookup(NamingContext.java:194)
at org.apache.naming.SelectorContext.lookup(SelectorContext.java:183)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
看来DBCP针对java.sql.DataSource相关的实现与ojdbc14.jar存在兼容性的问题，需要按照下面的写法才能OK：
Resource name="jdbc/MyDS" type="oracle.jdbc.pool.OracleConnectionCacheImpl"/
ResourceParams name="jdbc/MyDS"
parameter
namefactory/name
valueoracle.jdbc.pool.OracleDataSourceFactory/value
/parameter
parameter
namedriverClassName/name
valueoracle.jdbc.driver.OracleDriver/value
/parameter
parameter
nameurl/name
valuejdbc:oracle:thin:@server:port:sid/value
/parameter
parameter
nameuser/name
value########/value
/parameter
parameter
namepassword/name
value########/value
/parameter
/ResourceParams
原来Oracle自己实现了DataSource的工厂类来管理DataSource的建立！
同样发现微软的SQL Server 2000 Driver for JDBC Service Pack 3也存在这个问题！
http://www.microsoft.com/downloads/details.aspx？familyid=07287b11-0502-461a-b138-2aa54bfdc03a&displaylang=en
需要如下配置：
Resource name="jdbc/MyDS" auth="Container" type="com.microsoft.jdbcx.sqlserver.SQLServerDataSource"/
ResourceParams name="jdbc/MyDS"
parameter
namefactory/name
valuecom.microsoft.jdbcx.sqlserver.SQLServerDataSourceFactory/value
/parameter
parameter
namedriverClassName/name
valuecom.microsoft.jdbcx.sqlserver.SQLServerDataSource/value
/parameter
parameter
namedriverName/name
valueSQLServer/value
/parameter
parameter
namedescription/name
valueMy DataSource/value
/parameter
parameter
nameserverName/name
value########/value
/parameter
parameter
nameportNumber/name
value1433/value
/parameter
parameter
nameselectMethod/name
valuecursor/value
/parameter
parameter
namedatabaseName/name
value########/value
/parameter
parameter
nameuser/name
value########/value
/parameter
parameter
namepassword/name
value########/value
/parameter
parameter
nameloginTimeout/name
value3000/value
/parameter
/ResourceParams
