关于ActiveXObject("Msxml2.XMLHttp")无刷响应的问题

Question

如下代码，在执行过程中运行到最后一句xmlhttp.Send(null);的时候要老半天才反应过来，前台页面就和死机一样 但得到的结果又没错误，只是响应慢，其他页面调用类似方法就能直接响应
var xmlhttp = new ActiveXObject("Msxml2.XMLHttp");
  xmlhttp.Open("GET", "myserver/orders/processorder.asp", true);   
  xmlhttp.onreadystatechange= HandleStateChange;   
  xmlhttp.Send(null);请熟悉ActiveX的朋友给我解解惑

Answer 1

你这个可能还有页面缓存的问题
xmlhttp.Open("GET", "myserver/orders/processorder.asp?ajax=refresh&"+Math.random(), true);  
加个参数,每次访问链接都不一样,试一下

Answer 2

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws WHDCRMException {

String id=request.getParameter("id");
if(id==null){
return mapping.findForward("list");
}
response.setContentType("text/xml;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out;
try {
out = response.getWriter();
String returnstr="";
returnstr=this.getTree(id);
out.println(returnstr);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

Answer 3

public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws WHDCRMException {

String id=request.getParameter("id");
if(id==null){
return mapping.findForward("list");
}
response.setContentType("text/xml;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out;
try {
out = response.getWriter();
String returnstr="";
returnstr=this.getTree(id);
out.println(returnstr);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

Answer 4

function writeTree(xmlDom){
    functions=xmlDom.getElementsByTagName("Dic");
    var returnstr="";
    for(i=0;i<functions.length;i++){
        returnstr+="<div>";
        
        var level=new Number(functions[i].getAttribute("level"));
        for(n=0;n<level;n++){
            returnstr+="&nbsp;&nbsp;&nbsp;&nbsp;";
        }
        if(functions[i].getAttribute("hasNext").toLowerCase()=="true"){
            returnstr+="&nbsp;&nbsp;<img id=node"+functions[i].getAttribute("id")+" src='../images/icon_tree_+.gif' onclick=getChildTree('"+functions[i].getAttribute("id")+"','post'); style='cursor:hand;' status='+'>&nbsp;";
        }else{
            returnstr+="&nbsp;&nbsp;<img id=node"+functions[i].getAttribute("id")+" src='../images/em.gif' style='cursor:hand;' status='+'>&nbsp;";
        }
        
        returnstr+="<img src='../images/tree_07.gif' >";
        returnstr+="<span oncontextmenu=\"showRightMenu('"+functions[i].getAttribute("id")+"');fresh();\" style=\"cursor:hand;\"><a style=\"color:black;\" href=\"displayWorkEvaluation.do?id="+functions[i].getAttribute("id")+"\">"+functions[i].getAttribute("title")+"</a></span>";
        returnstr+="</div><div id=subnode"+functions[i].getAttribute("id")+" style='DISPLAY:none' loaded='no'></div>";
        
        var rms=functions[i].getElementsByTagName("RightMenu");
        for(n=0;n<rms.length;n++){
            var rm=new Array();
            rm.push(functions[i].getAttribute("id"));
            rm.push(rms[n].getAttribute("title"));
            rm.push(rms[n].getAttribute("url"));
            RightMenus.push(rm);
        }
    }
    
    subnode.innerHTML=returnstr;
}