在Wicket中,要在请求结束时避免FileUploadField重置,可以通过以下方法实现:
以下是一个简单的示例代码:
public class MyForm extends Form<Void> {
private FileUploadField fileUploadField;
public MyForm(String id) {
super(id);
fileUploadField = new FileUploadField("fileUploadField");
add(fileUploadField);
}
public void onSubmit() {
List<FileUpload> fileUploads = fileUploadField.getFileUploads();
// 处理文件上传
// ...
// 将文件列表保存到会话中
getSession().setAttribute("fileUploads", fileUploads);
}
@Override
protected void onInitialize() {
super.onInitialize();
// 从会话中检索文件列表
List<FileUpload> fileUploads = (List<FileUpload>) getSession().getAttribute("fileUploads");
if (fileUploads != null) {
// 将文件列表设置回FileUploadField
fileUploadField.setFileUploads(fileUploads);
}
}
}
这样,在每次请求结束时,FileUploadField的状态将被保留,避免了重置。
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