ajax上传文件

        $('#update-icon').click(function(){
            $(this).next('[type=file]').click().change(function(index, item){
                var file = $(this)[0].files[0];
                var formData = new FormData();
                formData.append('file',file), formData.append('dirName','clothes');
                $.ajax({
                    url: '/upload/index',type: 'post',data: formData,
                    processData: false,contentType: false,
                    success:function(res){
                    	
                    },
                    error: function(){
                        
                    }
                })
            })
        })