请问exception 在哪里定义?谢谢
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ColNewsListUQ.DatabaseQuery("rd1","works","sa","sa");
Vector vt = new Vector();
String sqlString = "select * from js ";
String fieldName[] ={"id","biaoti","zuozhe","shijian"};
int countOfResult = ColNewsListUQ.getCountQuery("select count(*) from js ");
if(countOfResult<=0){
String vs=exception.getMessage();
}
else{
int maxOfPage = countOfResult/5;
int pageNumber = ColNewsListUQ.getPageNumber(request,"pageNumber",maxOfPage);
vt = ColNewsListUQ.getGeneralTable(sqlString,fieldName,pageNumber,5);
int sizeOfVector = vt.size();
%>
<table width="95%" valign="top" border="0" cellpadding="0" cellspacing="0" bgcolor="#eff3de" align="center">
<tr align="center" bgcolor="#C6CF8c">
<td width="55%" align="left" > 产品名称</td>
<td width="20%" align="left">产地</td>
<td width="25%" align="center">提交时间</td>
</tr>
<tr>
<%
GeneralTable gt = new GeneralTable();
for (int i=0; i<sizeOfVector; i++){
gt = (GeneralTable)vt.elementAt(i);
%>
<td height="24" style="line-height:24px"> <img src="image/tb.gif">
<a href="detail.jsp?id=<%=gt.getId()%>" target="new"><%=gt.getTitle()%></a><br> </td>
<td><%=gt.getDetail()%></td>
<% String temp=gt.getAddDate();
String upd=temp.substring(0,5);
%>
<td align="center" style="line-height:24px"><%=upd%></td>
</tr>
<%
}
%>
我帮你up吧,我也不太清楚 接分
if(countOfResult<=0){
String vs=exception.getMessage();
}
上面代码什么意思?
应该如下写啊!
int countOfResult = 0;
try
{
countOfResult = ColNewsListUQ.getCountQuery("select count(*) from js ");
}
catch(Exception exception)
{
String vs=exception.getMessage();
}
int countOfResult = 0;
try
{
countOfResult = ColNewsListUQ.getCountQuery("select count(*) from js ");
}
catch(Exception exception)
{
String vs=exception.getMessage();
}
可是刷新快了就会抱错
Error 500--Internal Server Error
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.5.1 500 Internal Server Error
The server encountered an unexpected condition which prevented it from fulfilling the request.
这是WEBLOGIC报的错
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Software cause
d connection abort: recv failed
java.lang.NullPointerException
<2003-6-30 下午06时05分49秒> <Error> <HTTP> <101017> <[ServletContext(id=1502691
4,name=DefaultWebApp,context-path=)] Root cause of ServletException
java.lang.NullPointerException
at jsp_servlet._test1.__cpzs._jspService(__cpzs.java:141)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
(ServletStubImpl.java:945)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:332)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:242)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationActio
n.run(WebAppServletContext.java:5363)
at weblogic.security.service.SecurityServiceManager.runAs(SecurityServic
eManager.java:721)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:3043)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2466)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
>