使用表单提交问题

  <form action="http://192.168.1.165:8088/upload" method="post"
         enctype="multipart/form-data">
        <input type="file" value='选择文件' name='file' >
        <input type="submit" value='提交'>
    </form>

1.表单提交在Network的xhr是看不到的，要选择All
2.表单提交会刷新页面
3.跨域问题可以后端设置access-control-allow-origin,以及access-control-allow-methos；但是methos不包含formData，所以客户端需要改为POST提交，代码如下，http传输中的request payload内容和表单是一致的

var url = "http://192.168.1.165:8088/upload";
        for(var i=0;i<fileList.length;i++){
            var formData = new FormData();
            formData.append("file", fileList[i]);   
            $.ajax({
                type: "POST",
                url: url,
                data:formData,
                contentType: false,
                processData: false,
                success: function (data) {
                    if(uploadImgUrl){
                        uploadImgUrl=uploadImgUrl+','+data
                    }else{
                        uploadImgUrl=data
                    }
                    console.log('uploadImgUrl :', uploadImgUrl);
                },
                failed: function () {
                    layer.alert("系统出错！");
                }
            });
        }