定时ajax获取日志(easyui滚动条+js)
js代码
设置全局变量
//为定时器创建一个数组,到时候一起清除 var dingShiQiArr=[]; //提示日志信息 var content =""; //控制定时ajax的开关 var flag=false; //定时获取日志信息的ajax属性 var getting = { type : "post",dataType:"json",async : true,//这里要注意,不能为false,否则这个请求会等上一个求完成才执行 url :contextPathName+'/reportInfo/getLoggerInfos.do',beforeSend: function () { return flag; },success:function(data){ var isStop=data.isStop;//这里为后台的日志信息被读取完后,告诉前台停止定时ajax的标志 var resultList=data.resultList; if(resultList==null||(resultList.length==0)){//日志如果信息为空,不管他,继续请求 return; }else{ var importProgress= data.progress;//进度条 $('#importProgressbar').progressbar('setValue',parseInt(importProgress)); var loggerType=data.loggerType; $.each(resultList,function(index,value) { content +="<p>"+value+"</p>";//将日志写入前台 }); $('#importResultDiv').html(content); document.getElementById('importResultDiv').scrollTop = document.getElementById('importResultDiv').scrollHeight; if(isStop==true){ flag=false; $('#importProgressbar').progressbar('setValue',100); function test(){ flag=false; for (var i = dingShiQiArr.length - 1; i >= 0; i--) { clearInterval(dingShiQiArr[i]);//清除定时器 }; } var t1 = window.setTimeout(test,200); //200毫秒后执行test方法 window.clearTimeout(t1); } } },error: function() { return; } };
启动定时ajax
dingShiQiArr.push(window.setInterval(function(){$.ajax(getting)},200));
这个在导入或导出操作之前放上这一行就行,但记得导入导出的ajax请求的async属性也为true!
Controller
@RequestMapping ("/getLoggerInfos")
@ResponseBody
public String getLoggerInfos (HttpServletRequest request,HttpServletResponse response)
{
Map <String,Object> jsonMap = new HashMap <String,Object> ();
List <String> resultList = new ArrayList <String> ();
List <String> resultListToHtml = new ArrayList <String> ();
String loggerType = request.getParameter ("loggerType");
Integer progress = 100;
boolean flag = false;
// 读取日志的下标
int loggerIndex = 0;
HttpSession session = request.getSession ();
if (("import").equals (loggerType))
{
// 获取导入日志信息
Object obj = session.getAttribute ("resultList");
Object loggerIndexObj = session.getAttribute ("loggerIndex");
Integer isExist = (Integer) loggerIndexObj;
if (null != isExist)
{
loggerIndex = isExist;
}
jsonMap.put ("loggerType",loggerType);
if (null != obj)
{
resultList = (List <String>) obj;
for (; loggerIndex < resultList.size (); loggerIndex++)
{
String str = resultList.get (loggerIndex);
if ("OVER".equals (str))
{
flag = true;
session.removeAttribute ("resultList");
}
else
{
resultListToHtml.add (str);
}
}
session.setAttribute ("loggerIndex",Integer.valueOf (loggerIndex));
}
else
{
resultList = null;
}
// 获取导入进度
Object obj1 = session.getAttribute ("importProgress");
if (null != obj1)
{
progress = (Integer) obj1;
}
}
else if (("export").equals (loggerType))
{
// 获取导出日志信息
Object obj = session.getAttribute ("exportResultList");
Object loggerIndexObj = session.getAttribute ("exp_loggerIndex");
Integer isExist = (Integer) loggerIndexObj;
if (null != isExist)
{
loggerIndex = isExist;
}
jsonMap.put ("loggerType",loggerType);
if (null != obj)
{
resultList = (List <String>) obj;
for (; loggerIndex < resultList.size (); loggerIndex++)
{
String str = resultList.get (loggerIndex);
if ("OVER".equals (str))
{
flag = true;
session.removeAttribute ("exportResultList");
}
else
{
resultListToHtml.add (str);
}
}
session.setAttribute ("exp_loggerIndex",Integer.valueOf (loggerIndex));
}
else
{
resultList = null;
}
// 获取导入进度
Object obj1 = session.getAttribute ("exportProgress");
if (null != obj1)
{
progress = (Integer) obj1;
}
}
jsonMap.put ("isStop",flag);
jsonMap.put ("resultList",resultListToHtml);
jsonMap.put ("progress",progress);
String jsonStr = JSONObject.fromObject (jsonMap).toString ();
return jsonStr;
}
html
<!-- 显示日志弹出框 importResultDiv--> <div id="showResult" class="easyui-dialog" style="width: 600px; height:550px;" closed="true" buttons="#showResult-buttons" data-options="modal:true"> <div id="importProgressbar" class="easyui-progressbar" style="width:540px;margin-left:20px;margin-top:20px;"></div> <div id="importResultDiv" class="importResultDiv"> </div> </div> <div id="showResult-buttons"> <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" id="claenResult">关闭</a> </div>
补充(日志显示框滚动条在底部)
document.getElementById('importResultDiv').scrollTop = document.getElementById('importResultDiv').scrollHeight;该代码表示,日志框出现滚动条时,会滚动到最底部,将呈现出一种动态的效果给用户!
