帮我解决一个图像刷新的问题

Question

<%
String filePath="cims67_NT_CPU";
int id=1;
if(request.getParameter("class")!=null){
  filePath=request.getParameter("class");
  id=Integer.parseInt(request.getParameter("id"));
drawchart draw=new drawchart(filePath,id);

Answer 1

<%
String filePath="cims67_NT_CPU";
int id=1;
if(request.getParameter("class")!=null){
  filePath=request.getParameter("class");
  id=Integer.parseInt(request.getParameter("id"));
  drawchart draw=new drawchart(filePath,id);
}...if(request.getParameter("class")==null)
{
out.println("<IMG src='"+"demo.jpg"+"' align=absMiddle>");

}
else {%>
<IMG src="chart.jpg" align="absMiddle">
<%
}%>

Answer 2

页面的刷新下面代码实现
<tr > 
   <td width="2" bgcolor="#C0C0C0"> </td>
          
   <td width="100"height="25"class="highlight1">    <a onmouseover=ShowMenu(cpu,70) href="indexoforacle.jsp?class=cims108_ORACLE_USERS&id=1" onclick="javascript:location.replace(this.href);" ><div align="center">
  ORACLE当前状态</a></div></td>
          <td width="1" bgcolor="#C0C0C0"> </td>
          <td width="100"height="25"class="highlight1"> 
  <a onmouseover=ShowMenu(user,70) href="indexoforacle.jsp?class=cims108_ORACLE_USERS&id=2" onclick="javascript:location.replace(this.href);" ><div align="center">
  ORACLE当前用户</a></div></td>
          <td width="1" bgcolor="#C0C0C0"> </td>
            <td width="100"height="25"class="highlight1"> 
  <a onmouseover=ShowMenu(network,70) href="indexoforacle.jsp?class=cims108_ORACLE_USERS&id=3" onclick="javascript:location.replace(this.href);" ><div align="center">
  ORACLE网络状态</a></div></td>
          <td width="1" bgcolor="#C0C0C0"> </td>
          <td width="0.5" > </td>
</tr>