SQL2005+JSP+TOMCAT 无法创建下列URL的连接，求高手帮忙!!!

确定了端口是1433 jar包也导入了 驱动也装对了，但任然连接不了，求高手指点！！！具体代码如下：Sun May 08 01:41:35 CST 2011: 成功注册JDBC驱动程序com.microsoft.sqlserver.jdbc.SQLServerDriver
Sun May 08 01:41:35 CST 2011: 成功创建连接池sqlserver
Sun May 08 01:41:37 CST 2011: 无法创建下列URL的连接: jdbc:sqlserver://hostlocal:1433;DatabaseName=hrms
java.lang.NullPointerException
java.lang.NullPointerException
at hrms.user.User.ChkLogin(User.java:119)
at org.apache.jsp.ChkLogin_jsp._jspService(ChkLogin_jsp.java:108)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)