500 Servlet Exception

[kevinlu86]

500 Servlet Exception

java.lang.NullPointerException
at java.util.Date.compareTo(Date.java:905)
at _jsp._bbs._announce__jsp._jspService(/bbs/INC/error.jsp:8)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.pageservice(Page.java:571)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:155)
at com.caucho.filters.RewriteFilter.doFilter(RewriteFilter.java:135)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:84)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:211)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:177)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:323)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:430)
at com.caucho.util.ThreadPool.run(ThreadPool.java:377)
at java.lang.Thread.run(Thread.java:534)


这个异常是什么意思呢？谢谢

[jacshan]

java.lang.NullPointerException
空指针

[bluesky35]

java.util.Date.compareTo方法的参数为null,同意楼上的观点

[galant2008]

把代码贴出来嘛

[xiaoyetao08]

是啊
接着贴啊．．．．．．

[ever_li]

你那个jsp上调用了java.util.Date的compareTo方法，但是估计你传得参数是个null所以出错了

[kingnights]

同意楼上