var form = new FormData(document.getElementById("friendshipCooperationFrom"));

$.ajax({
 url:"<%=basePath%>${action }",type:"post",data:form,processData:false,contentType:false,success:function(data){
   alert(data);
 },error:function(e){
   alert("错误！！");
 }
});


new FormData();

from表單無法序列化文件，使用FormData