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@override
 public void addresourcehandlers(resourcehandlerregistry registry) {
   registry.addresourcehandler("/imctemp-rainy/**").addresourcelocations("file:d:/e/");
 }

<input type="file" name="file" id="file">
<p id="url"><img src="" width=200></p>
<input type="button" id="button" value="上傳" >
$(function () {
    $("#button").click(function () {
      var form = new formdata();
      form.append("file", document.getelementbyid("file").files[0]);
       $.ajax({
         url: "/stu/upload",    //后臺url
         data: form,
         cache: false,
         async: false,
         type: "post",          //類型，post或者get
         datatype: 'json',       //數據返回類型，可以是xml、json等
         processdata: false,
         contenttype: false,
         success: function (data) {   //成功，回調函數
           if (data) {
           var pic="/imctemp-rainy/"+data.filename;
           $("#url img").attr("src",pic);
           // alert(json.stringify(data));
           } else {
           alert("失敗");
           }
         },
         error: function (er) {     //失敗，回調函數
         alert(json.stringify(data));
         }
       });
    })
  })

public static void uploadfile(byte[] file, string filepath, string filename) throws exception {    
 file targetfile = new file(filepath); 
 if (!targetfile.exists()) {
   targetfile.mkdirs();  
 }    
 fileoutputstream out = new fileoutputstream(filepath +"/"+ filename);
 out.write(file);   
 out.flush();  
 out.close(); 
 }
 //處理文件上傳
  @responsebody //返回json數據 
  @requestmapping(value = "upload", method = requestmethod.post) 
  public jsonobject uploadimg(@requestparam("file") multipartfile file,httpservletrequest request) {    
    string contenttype = file.getcontenttype(); 
    system.out.print(contenttype);
  string filename = system.currenttimemillis()+file.getoriginalfilename();  
  string filepath = "d:/e";
   jsonobject jo = new jsonobject();//實例化json數據
 
  if (file.isempty()) {  
   jo.put("success", 0);
   jo.put("filename", "");
  }    
  try { 
    uploadfile(file.getbytes(), filepath, filename); 
    jo.put("success", 1);
    jo.put("filename", filename);
   // jo.put("xfilename", filepath+"/"+filename);
  } catch (exception e) { 
  // todo: handle exception    
  
  }  
 
  //返回json
    return jo;  
  }