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Java code:
int startPos=pagesize*(pageNo-1);//pagesize±íʾÿҳÏÔʾÌõÊý pageNo±íʾҳÊý
Statement stmt = con.createStatement();
String sql="pdate not in (select top "+startPos+" pdate from article order by pdate desc)";//pdateΪ×Ö¶Î
ResultSet rs=stmt.executeQuery("select top "+pagesize+" * from article where pid=0 and "+sql+"order by pdate desc"
);



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ÎÒÌù³öÀ´ÁËѽ ResultSet rs=stmt.executeQuery("select top "+pagesize+" * from article where pid=0 and "+sql+"order by pdate desc"
            );


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if(page>1){
  num= PAGENUM*(page-1);
}
String sql="select top "
+ PAGENUM
+ " * from dbo.PRODUCT where productID not in(select top "
+ num
+ " productID from dbo.PRODUCT)";
ÆäÖÐPAGENUMÊÇÉ


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jspÖÐ <c:if test> Ïà¹ØÎÊÌâ

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<c:if test="${not empty dataValue}">
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jspÒ³Ãæ»ñÈ¡sessionµÄÎÊÌâ - Java / Java EE

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jspÏà¹ØÎÊÌâ - Web ¿ª·¢ / JavaScript

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if(rs.next()){
 session.setAttribute( "username" , user);
  <jsp:include page="login.jsp" />// ......

Unable to compile class for JSP - Java / Web ¿ª·¢

<%@page language="java" contentType="text/html;charset=gb2312" import="java.sql.*"%>
<jsp:useBean id="db" class="wang.connectDB"/>
< ......
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