用Sybase,如何写data-source的各属性？

似乎不同的db,写法不同，
有用Sybase成功配置data-source的吗？
请给个例子。
我照着struts文档的例子postgresql，出现了如下错误：
不明所以，恳请高手指教
StandardContext[/bsdatas]: Servlet /bsdatas threw load() exception: javax.servlet.ServletException: Servlet.init() for servlet action threw exceptionjavax.servlet.ServletException: Servlet.init() for servlet action threw exception at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:963) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3421) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3609) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579) at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:700) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:252) at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256) at org.apache.commons.digester.Rule.end(Rule.java:276) at org.apache.commons.digester.Digester.endElement(Digester.java:1058) at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1683) at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:634) at org.apache.crimson.parser.Parser2.parse(Parser2.java:333) at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448) at org.apache.commons.digester.Digester.parse(Digester.java:1567) at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:385) at org.apache.catalina.core.StandardHost.install(StandardHost.java:803) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:442) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:399) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:718) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:358) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1196) at org.apache.catalina.core.StandardHost.start(StandardHost.java:738) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347) at org.apache.catalina.core.StandardService.start(StandardService.java:497) at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190) at org.apache.catalina.startup.Catalina.start(Catalina.java:512) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)