SpringMVC上传图片代码实例

    
      

        

          

            

              
修改头像
            
            

                

                  

                    
                       上传头像图片
                    
                  
                  

                      
（仅限上传单张10M以下png、jpg图片）
                      
                  
                
                

                

                  

                    
                  
                  
                
            
          
        
      
       
    

$("#btn_upload").click(function(){
        $("#InputFile").trigger("click");
        openUploads("InputFile");
      });
      function openUploads(id){
        $("#"+id).unbind().change(function(){
          var formdata = new FormData();
          formdata.append('file',$("#"+id)[0].files[0]); //获取图片信息
          //console.log($("#"+id)[0].files[0]);
          $.ajax({
            type: 'POST',
            url: "http://localhost:8078/lifeTrackDB/UploadUserAvatars",
            data:formdata,
            cache:false,
            dataType: 'json',
            processData:false,
            contentType:false,
            success : function (result)
            {
              console.log(result);
              if (result.status)
              {
                //$('#'+id).attr('src','images/UserAvatars/'+result.message);
                alert(result.message);
              }
              else
              {
                $.alert(result.message,'');
              }
            }
          });
        });
      }

@RequestMapping(value="/UploadUserAvatars")
@ResponseBody
public void UploadUserAvatars(HttpServletRequest request,HttpServletResponse response,
       @RequestParam(value = "file") List files) throws Exception{
     
    String path=System.getProperty("user.dir");
    
  if (null != files || 0 != files.size()) { 
    for(MultipartFile file:files) {
      //System.err.println("文件名：" + file.getOriginalFilename() + "---contentType：" + file.getContentType()); 
      file.transferTo(new File(path+"/UserAvatars/"+file.getOriginalFilename()));
      response.getWriter().write("{\"status\": true, \"code\": \"200\",\"message\":\"上传成功\"}");
    }
    }else {
      //response.getWriter().write("handleCallback({\"status\": false, \"code\": \"200\",\"message\":\"上传失败\"})");
      response.getWriter().write("{\"status\": false, \"code\": \"200\",\"message\":\"上传失败\"}");
    }    
}