smartgwt - How can i extract the an image i have uploaded using the UploadItem in SmartGWT, as a byte array?

Question

I would like to get the binary content of an image i uploaded using the UploadItem of SmartGWT but the UploadItem.getValue() method returns only the URL of the image. I looked through the API and there doesnt seem to be a method that can achieve what i require. Did i miss something? Does anyone have an idea?

Answer 1

对我来说，你得到的行为是正常的，你得到的值是 formItem 的值，即输入的值，所以在你的情况下是图像的 url。要获取二进制内容，您需要使用正确的编码、正确的 http 方法设置表单并提交表单。在服务器端，您必须处理请求，发回图像内容。在 submitComplete 事件上返回客户端，您必须恢复响应中的图像内容。就我个人而言，我从不混合gwt小部件，smartgwt 除了上传（我真的不记得为什么......:)）我使用 gwt 的地方FileUpload。希望它可以帮助