jsp 查询显示 100分

Question

http://www.cnjsp.com/topic/index.jsp?tclass=2

Answer 1

int intPageSize;           //一页显示的记录数
int intRowCount;           //记录总数
int intPageCount;          //总页数
int intPage;               //待显示页码
java.lang.String strPage;int i;//设置一页显示的记录数
intPageSize =10;//取得待显示页码
strPage = request.getParameter("page");
if(strPage==null){//表明在QueryString中没有page这一个参数，此时显示第一页数据
   intPage = 1;
}
else{//将字符串转换成整型
   intPage = java.lang.Integer.parseInt(strPage);
   if(intPage<1) intPage = 1;
}
ResultSet sqlRst = statemet.executeQuery("select * from bbs order by deptid");
//分页片断
%>
 <%   //获取记录总数
if(sqlRst.next()){
sqlRst.last();
intRowCount = sqlRst.getRow();//记算总页数
intPageCount = (intRowCount+intPageSize-1) / intPageSize;//调整待显示的页码
if(intPage>intPageCount)  intPage = intPageCount; 
    out.println("<font color=#000099 size=3>  现在共有留言"+intRowCount+"条</font>");
%><tr> 
                      <td width="8%" align="center" bgcolor="#99CCCC"><font  size=2 color="#000000">删除</font></td>
                      <td width="32%" align="center" bgcolor="#99CCCC"><font color="#000000">留言主题</font></td>
                      <td width="25%" align="center" bgcolor="#99CCCC"><font color="#000000">发布部门</font></td>
                      <td width="29%" align="center" bgcolor="#99CCCC"><font color="#000000">发布人</font></td>
                    </tr>
                   <%
if(intPageCount>0){
   //将记录指针定位到待显示页的第一条记录上
      sqlRst.absolute((intPage-1) * intPageSize + 1);   //显示数据
   i = 0;
    
   while(i<intPageSize){
  %>
                    <tr> 
                        <%String title =new String(sqlRst.getString("title").getBytes("ISO8859_1"),"GBK");

if(title.length()>20){
title=title.substring(0,20);
}%>                      <td width="8%" align="center"> 
                        <input type="checkbox" name="bbsdel<%=i%>" value="<%=sqlRst.getInt("id")%>">
    </td>
                      <td width="32%" align="center"><a href="../system/bbsmain.jsp?method=5&boardid=<%=sqlRst.getInt("id")%>"><%=title%></a></td>
                     <td width="25%" align="center"><%=new String(sqlRst.getString("dept").getBytes("ISO8859_1"),"GBK")%></td>
                     <td width="29%" align="center">&nbsp;<%=new String(sqlRst.getString("name").getBytes("ISO8859_1"),"GBK")%></td>
                    </tr>
                   <%  if (sqlRst.getRow()==intRowCount)  break;
      sqlRst.next();
      i++;
 
   }
//}
%> <tr>
<td colspan=5><table border="1" cellspacing="0"   bordercolorlight="#000000" bordercolordark="#FFFFFF"cellpadding="0" height="11" width="100%" bgcolor="#99CCCC">
                    <tr> 
<td width="12%"> <input name=method type=hidden value=3>
                          <div align="center"><a href ="bbsmain.jsp?method=3"><font color="#FFFFFF" size="2"><input type=submit value="删除" name="ok"></font></a> 
                          </div>
                        </td>
                        <td width="12%"> 
                          <div align="center"><a href ="bbsmain.jsp"><font color="#FFFFFF" size="2">第一页</font></a> 
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <div align="center"> 
                            <%if(intPage<intPageCount){%>
                            <a href="bbsindex.jsp?page=<%=intPage+1%>"><font color="#FFFFFF" size="2">下一页</font></a> 
                            <%}%>
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <div align="center"> 
                            <%if(intPage>1){%>
                            <a href="bbsindex.jsp?page=<%=intPage-1%>"><font color="#FFFFFF" size="2">上一页</font></a> 
                            <%}%>
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <%int dd=intPageCount;%>
                          <div align="center"><a href= "bbsindex.jsp?page=<%=intPageCount%>"><font color="#FFFFFF" size="2">末页</font></a> 
                          </div>
                        </td>
                        
                      <td width="11%"> 
                        <div align="center"><font color="#FFFFFF" size="2">第<%=intPage%> 
                            页</font></div>
                        </td>
                        
                      <td width="11%"> 
                        <div align="center"><font size="2" color="#FFFFFF">总<%=intPageCount%> 
                            页</font></div>
                        </td>
                      </tr>
                    </table>
</td></tr>   <%}}
  else{
       out.println("对不起现在没有留言！");
  }
  sqlRst.close();
  %>
                  </table>
  </form>
                </td>
              </tr>
            </table>
            <%

Answer 2

int intPageSize;           //一页显示的记录数
int intRowCount;           //记录总数
int intPageCount;          //总页数
int intPage;               //待显示页码
java.lang.String strPage;int i;//设置一页显示的记录数
intPageSize =10;//取得待显示页码
strPage = request.getParameter("page");
if(strPage==null){//表明在QueryString中没有page这一个参数，此时显示第一页数据
   intPage = 1;
}
else{//将字符串转换成整型
   intPage = java.lang.Integer.parseInt(strPage);
   if(intPage<1) intPage = 1;
}
ResultSet sqlRst = statemet.executeQuery("select * from bbs order by deptid");
//分页片断
%>
 <%   //获取记录总数
if(sqlRst.next()){
sqlRst.last();
intRowCount = sqlRst.getRow();//记算总页数
intPageCount = (intRowCount+intPageSize-1) / intPageSize;//调整待显示的页码
if(intPage>intPageCount)  intPage = intPageCount; 
    out.println("<font color=#000099 size=3>  现在共有留言"+intRowCount+"条</font>");
%><tr> 
                      <td width="8%" align="center" bgcolor="#99CCCC"><font  size=2 color="#000000">删除</font></td>
                      <td width="32%" align="center" bgcolor="#99CCCC"><font color="#000000">留言主题</font></td>
                      <td width="25%" align="center" bgcolor="#99CCCC"><font color="#000000">发布部门</font></td>
                      <td width="29%" align="center" bgcolor="#99CCCC"><font color="#000000">发布人</font></td>
                    </tr>
                   <%
if(intPageCount>0){
   //将记录指针定位到待显示页的第一条记录上
      sqlRst.absolute((intPage-1) * intPageSize + 1);   //显示数据
   i = 0;
    
   while(i<intPageSize){
  %>
                    <tr> 
                        <%String title =new String(sqlRst.getString("title").getBytes("ISO8859_1"),"GBK");

if(title.length()>20){
title=title.substring(0,20);
}%>                      <td width="8%" align="center"> 
                        <input type="checkbox" name="bbsdel<%=i%>" value="<%=sqlRst.getInt("id")%>">
    </td>
                      <td width="32%" align="center"><a href="../system/bbsmain.jsp?method=5&boardid=<%=sqlRst.getInt("id")%>"><%=title%></a></td>
                     <td width="25%" align="center"><%=new String(sqlRst.getString("dept").getBytes("ISO8859_1"),"GBK")%></td>
                     <td width="29%" align="center">&nbsp;<%=new String(sqlRst.getString("name").getBytes("ISO8859_1"),"GBK")%></td>
                    </tr>
                   <%  if (sqlRst.getRow()==intRowCount)  break;
      sqlRst.next();
      i++;
 
   }
//}
%> <tr>
<td colspan=5><table border="1" cellspacing="0"   bordercolorlight="#000000" bordercolordark="#FFFFFF"cellpadding="0" height="11" width="100%" bgcolor="#99CCCC">
                    <tr> 
<td width="12%"> <input name=method type=hidden value=3>
                          <div align="center"><a href ="bbsmain.jsp?method=3"><font color="#FFFFFF" size="2"><input type=submit value="删除" name="ok"></font></a> 
                          </div>
                        </td>
                        <td width="12%"> 
                          <div align="center"><a href ="bbsmain.jsp"><font color="#FFFFFF" size="2">第一页</font></a> 
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <div align="center"> 
                            <%if(intPage<intPageCount){%>
                            <a href="bbsindex.jsp?page=<%=intPage+1%>"><font color="#FFFFFF" size="2">下一页</font></a> 
                            <%}%>
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <div align="center"> 
                            <%if(intPage>1){%>
                            <a href="bbsindex.jsp?page=<%=intPage-1%>"><font color="#FFFFFF" size="2">上一页</font></a> 
                            <%}%>
                          </div>
                        </td>
                        
                        <td width="12%"> 
                          <%int dd=intPageCount;%>
                          <div align="center"><a href= "bbsindex.jsp?page=<%=intPageCount%>"><font color="#FFFFFF" size="2">末页</font></a> 
                          </div>
                        </td>
                        
                      <td width="11%"> 
                        <div align="center"><font color="#FFFFFF" size="2">第<%=intPage%> 
                            页</font></div>
                        </td>
                        
                      <td width="11%"> 
                        <div align="center"><font size="2" color="#FFFFFF">总<%=intPageCount%> 
                            页</font></div>
                        </td>
                      </tr>
                    </table>
</td></tr>   <%}}
  else{
       out.println("对不起现在没有留言！");
  }
  sqlRst.close();
  %>
                  </table>
  </form>
                </td>
              </tr>
            </table>

Answer 3

这是一个典型的JSP读取数据库的问题，要想动态产生页面，当然要将所有文章存放在数据库中。最简单的例子就是用一张表专门存放文章信息，字段可以这样设计：
ID
标题
作者
日期
人气
内容下面是例子程序代码，文件名为selectdb.jsp。
<%
java.sql.Connection sqlCon;
java.sql.Statement sqlStmt;
java.sql.ResultSet sqlRst;String strCon;
String strSQL;int intPageSize;
int intRowCount;
int intPageCount;
int intPage;
String strPage;int i;
intPageSize = 20;strPage = request.getParameter("page");
if(strPage==null){
 intPage = 1;
}
else{
 intPage = java.lang.Integer.parseInt(strPage);
 if(intPage<1) intPage = 1;
}
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
strCon = "jdbc:odbc:testsqlCon = java.sql.DriverManager.getConnection(strCon,"sa","");sqlStmt = sqlCon.createStatement(java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);strSQL = "select title,author,date,count from artical"
sqlRst = sqlStmt.executeQuery(strSQL);
sqlRst.last();
intRowCount = sqlRst.getRow();intPageCount = (intRowCount+intPageSize-1) / intPageSize;if(intPage>intPageCount) intPage = intPageCount;
%><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JSP</title>
</head>
<body>
<table border="1" cellspacing="0" cellpadding="0">
<tr>
<th>标题</th>
<th>作者</th>
<th>日期</th>
<th>人气</th>
</tr><%
if(intPageCount>0){
 sqlRst.absolute((intPage-1) * intPageSize + 1); i = 0;
 while(i<intPageSize && !sqlRst.isAfterLast()){
%>
<tr>
 <td><%=sqlRst.getString(1)%></td>
 <td><%=sqlRst.getString(2)%></td>
 <td><%=sqlRst.getString(3)%></td>
 <td><%=sqlRst.getString(4)%></td>
</tr>
<%
sqlRst.next();
i++;
 }
}
%>
</table>第<%=intPage%>页/总共<%=intPageCount%>页
<%if(intPage>1){%>
<a href="selectdb.jsp?page=<%=intPage-1%>">前一页</a>
<%}%>
<%if(intPage<intPageCount){%>
<a href="selectdb.jsp?page=<%=intPage+1%>">下一页</a>
<%}%>
</body>
</html><%
sqlRst.close();
sqlStmt.close();
sqlCon.close();
%>