I copied this code (allow user to upload image from client to server) from
internet
https://code.google.com/p/gwtupload/source/browse/samples/src/main/java/gwtuploadsample/server/SampleUploadServlet.java?r=e0b4acbaa632114978b085801a004116b6dbcf52
But it doesn't give an actual code to save the file into a folder in server
package my.server;public class SampleUploadServlet extends UploadAction{
private static final long serialVersionUID = 1L;
Hashtable<String, String> receivedContentTypes = new Hashtable<String,
String>();
/**
* Maintain a list with received files and their content types.
*/
Hashtable<String, File> receivedFiles = new Hashtable<String, File>();
/**
* Override executeAction to save the received files in a custom place
* and delete this items from session.
*/
@Override
public String executeAction(HttpServletRequest request, List<FileItem>
sessionFiles) throws UploadActionException {
String response = "";
int cont = 0;
for (FileItem item : sessionFiles) {
if (false == item.isFormField()) {
cont ++;
try {
/// Create a new file based on the remote file name in the client
// String saveName =
item.getName().replaceAll("[\\\\/><\\|\\s\"'{}()\\[\\]]+", "_");
// File file =new File("/tmp/" + saveName);
/// Create a temporary file placed in /tmp (only works in unix)
// File file = File.createTempFile("upload-", ".bin", new
File("/tmp"));
/// Create a temporary file placed in the default system temp folder
File file = File.createTempFile("upload-", ".bin");
item.write(file);
/// Save a list with the received files
receivedFiles.put(item.getFieldName(), file);
receivedContentTypes.put(item.getFieldName(), item.getContentType());
//Window.alert(file.getAbsolutePath()+" oook");
//String s=file.getAbsolutePath()+" oook";
/// Send a customized message to the client.
response += "File saved as " + file.getAbsolutePath();
//FileWriter fstream = new
FileWriter(file.getAbsolutePath()+"//folder//out.txt",true);
//SEEM WE NEED TO DO SOMETHING HERE TO SAVE A FILE INTO THE FOLDER.
} catch (Exception e) {
throw new UploadActionException(e);
}
}
}
// System.out.println(response);
/// Remove files from session because we have a copy of them
removeSessionFileItems(request);
/// Send your customized message to the client.
return response;
}
/**
* Get the content of an uploaded file.
*/
@Override
public void getUploadedFile(HttpServletRequest request, HttpServletResponse
response) throws IOException {
String fieldName = request.getParameter(UConsts.PARAM_SHOW);
File f = receivedFiles.get(fieldName);
if (f != null) {
response.setContentType(receivedContentTypes.get(fieldName));
FileInputStream is = new FileInputStream(f);
copyFromInputStreamToOutputStream(is, response.getOutputStream());
} else {
renderXmlResponse(request, response, XML_ERROR_ITEM_NOT_FOUND);
}
}
/**
* Remove a file when the user sends a delete request.
*/
@Override
public void removeItem(HttpServletRequest request, String fieldName) throws
UploadActionException {
File file = receivedFiles.get(fieldName);
receivedFiles.remove(fieldName);
receivedContentTypes.remove(fieldName);
if (file != null) {
file.delete();
}
}}
Sp suppose I have a folder image in Package "server", then How can I save
the file into server/image?
(also
http://stackoverflow.com/questions/22852538/gwt-sampleuploadservlet-how-to-save-a-file-into-a-folder-in-server-java-gwt
)
I think you can do this with only Java knowlege, you don't need Gwt
knowledge.
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