500分求解（2）

[littlef]

出错提示：

HttpConnector Opening server socket on all host IP addresses

Starting service Tomcat-Standalone

Apache Tomcat/4.0.3

WebappLoader[/TestJSP]: Deploying class repositories to work directory D:\JBuilder7\MyProject\TestConnectionPool\Tomcat\work\TestJSP

StandardManager[/TestJSP]: Seeding random number generator class java.security.SecureRandom

StandardManager[/TestJSP]: Seeding of random number generator has been completed

StandardWrapper[/TestJSP:default]: Loading container servlet default

StandardWrapper[/TestJSP:invoker]: Loading container servlet invoker

WebappLoader[]: Deploying class repositories to work directory D:\JBuilder7\MyProject\TestConnectionPool\Tomcat\work

StandardManager[]: Seeding random number generator class java.security.SecureRandom

StandardManager[]: Seeding of random number generator has been completed

StandardWrapper[:default]: Loading container servlet default

StandardWrapper[:invoker]: Loading container servlet invoker

HttpConnector[8080] Starting background thread

Driver--oracle.jdbc.driver.OracleDrivernot found!

StandardWrapperValve[debugjsp]: Servlet.service() for servlet debugjsp threw exception

java.lang.NullPointerException

java.lang.NullPointerException

at testconnectionpool.ConnectionPool.executeQuery(ConnectionPool.java:98)

at org.apache.jsp.Welcome$jsp._jspService(Welcome$jsp.java:66)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)

at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)

at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)

at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)

at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)

at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)

at java.lang.Thread.run(Thread.java:484)