myeclipse8.5导入项目后连不上mysql库了

am2000 2010-02-25 02:58:51

同样的程序，用myelipse8.5编译过后运行出错。

org.apache.jasper.JasperException: java.lang.NullPointerException

	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)

	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)

	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)

	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)

	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)





root cause

日志:
2010-2-25 14:36:26 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Unknown Source)
at java.util.Properties.load0(Unknown Source)
at java.util.Properties.load(Unknown Source)
at util.Database.init(Database.java:38)
at util.Database.<init>(Database.java:52)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:87)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Unknown Source)
可能是什么原因？

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