我有一个上传字段。我只想上传图片。我已经申请了相同的验证。但是如果出现错误，我希望将错误添加到表单上的反馈面板中。
上传面板.html
<form wicket:id="frmProduct" >
<div wicket:id="feedback"></div>
<label>Category1 *:</label><br/>
<input type="text" wicket:id="Category1"><br/>
<label>Category2 *:</label><br/>
<input type="text" wicket:id="Category2"><br/>
<label>ProductName *:</label><br/>
<input type="text" wicket:id="ProductName"><br/>
<label>TaxAmount *:</label><br/>
<input type="text" wicket:id="TaxAmount"><br/>
<label>UnitPrice *:</label><br/>
<input type="text" wicket:id="UnitPrice"/><br/>
<label>Description</label><br/>
<textarea wicket:id="Description" id ="Description" rows="6" cols="20"></textarea><br/>
<label>Description</label><br/>
<input wicket:id="uploadField" size="40" type="file"/><br/>
<input type="submit" wicket:id="submit" value="Save"/>
</form>
上传面板.java
if(uploadField.getFileUpload() != null && uploadField.getFileUpload().getClientFileName() != null){
FileUpload upload = uploadField.getFileUpload();
String ct = upload.getContentType();
if (!imgctypes.containsKey(ct)) {
hasError = true;
}
if(upload.getSize() > maximagesize){
hasError = true;
}
if(hasError == false){
System.out.println("######################## Image can be uploaded ################");
imageEntry.setContentType(upload.getContentType());
imageEntry.setImageName(upload.getClientFileName());
imageEntry.setImageSize(upload.getSize());
if(imageEntry != null){
try {
save(imageEntry,upload.getInputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
}else{
target.appendJavaScript("$().toastmessage('showNoticeToast','Please select a valid image!!')");
System.out.println("#################### Error in image uploading ###################");
}
}else{
System.out.println("########################### Image not Selected #####################");
}
任何帮助和建议表示赞赏！提前致谢。