About the struts framework upload file size of the problem ! ! !

If the upload is smaller than the size set , then everything is normal ; if greater than the set , not only in this upload failed , and can not re-upload , re-upload will not work no matter how much ! Must restart the tomcat, this is how it is, how to solve ah ? Also, I want to limit the file size Jquery , how to do ?
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landlord positive solution, I think it is a single case caused. .
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Well , the default is 2M, 2M I upload more than the failure of normal, but I then I will not be able to re- upload , you must restart tomcat was back to normal , I really do not understand ah ! ! !                
landlord from the landlord's point of view should be used to describe the spring to manage the action, if it is, then check the landlord 's scope is not your action is not set to the default prototype is a singleton you once error occurs , the latter are this action can not be into it. Front determine file size of the file js code below     
    

  var file=document.getElementById("file");
  if(navigator.userAgent.indexOf("MSIE")!=-1){//IE下要用ActiveX控件
     var fos=new ActiveXObject("Scripting.FileSystemObject");
     var f=fos.GetFile(file.value);
     alert(f.size);
  }else{//firefox和google的直接用
     alert(file.files[0].size);
  }
  

       singleton pattern . I understand ! ! ! Thank you ! Detect file size code, which Google Firefox can, but IE's display can not create object, how is it ?  
IE to use activeX controls disabled if you set up a course, ie can not create the object
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http://blog.csdn.net/withiter/article/details/7272338
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this is not what I want
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this is not what I want of  
there are a judge upload file size .
jquery directly judge :

  function findSize(field_id)
   {
             var fileInput = $("#"+field_id)[0];
             byteSize  = fileInput.files[0].fileSize;
          return ( Math.ceil(byteSize / 1024) ); // Size returned in KB.
  }
  

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previously struts2 when seemingly maximum to support 2M. . . .

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Well , the default is 2M, 2M I upload more than the failure of normal, but I then I will not be able to re- upload , you must restart tomcat was back to normal , I really do not understand ah ! ! !
------ For reference only -------------------------------------- -
Well , the default is 2M, 2M I upload more than the failure of normal, but I then I will not be able to re- upload , you must restart tomcat was back to normal , I really do not understand ah ! ! !  
landlord from the landlord's point of view should be used to describe the spring to manage the action, if it is, then check the landlord 's scope is not your action is not set to the default prototype is a singleton you once error occurs , the latter are this action can not be into it. Front determine file size of the file js code below

  var file=document.getElementById("file");
  if(navigator.userAgent.indexOf("MSIE")!=-1){//IE下要用ActiveX控件
     var fos=new ActiveXObject("Scripting.FileSystemObject");
     var f=fos.GetFile(file.value);
     alert(f.size);
  }else{//firefox和google的直接用
     alert(file.files[0].size);
  }
  

------ For reference only ----------------------------------- ----

this is not what I want          
there are a judge upload file size .   
jquery directly judge :   
  

  function findSize(field_id)
   {
             var fileInput = $("#"+field_id)[0];
             byteSize  = fileInput.files[0].fileSize;
          return ( Math.ceil(byteSize / 1024) ); // Size returned in KB.
  }
  

  this does not work , the test does not pass !
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Well , the default is 2M, 2M I upload more than the failure of normal, but I then I will not be able to re- upload , you must restart tomcat was back to normal , I really do not understand ah ! ! !  

then I 'd not only failed to upload it. . .
tomcat still running. . .
Also if there is a modified configuration can support up to 10M, which is was accidentally know , did not specifically to remember . The landlord can then go to Soso bar, found to also share to me.
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finally met a cow ! ! ! ! ! ! ! Really sharply ah ! I'm a beginner, you do not say I really do not know ! This problem has troubled me a lot of hours .
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Well , the default is 2M, 2M I upload more than the failure of normal, but I then I will not be able to re- upload , you must restart tomcat was back to normal , I really do not understand ah ! ! !          
landlord from the landlord's point of view should be used to describe the spring to manage the action, if it is, then check the landlord 's scope is not your action is not set to the default prototype is a singleton you once error occurs , the latter are this action can not be into it. Front determine file size of the file js code below   
  

  var file=document.getElementById("file");
  if(navigator.userAgent.indexOf("MSIE")!=-1){//IE下要用ActiveX控件
     var fos=new ActiveXObject("Scripting.FileSystemObject");
     var f=fos.GetFile(file.value);
     alert(f.size);
  }else{//firefox和google的直接用
     alert(file.files[0].size);
  }
  

  singleton pattern . I understand ! ! ! Thank you ! Detect file size code, which Google Firefox can, but IE's display can not create object, how is it ?