| package flex.samples.servlets;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import java.util.List;
import java.util.Iterator;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
/**
* This class provides functionality to handle an uploaded file.
* This class uses code provided by Apache
*
* @author geert.zijlmans
*
*/
public class ProcessFileUpload extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public ProcessFileUpload() {
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (isMultipart) {
// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Parse the request
List /* FileItem */ items = upload.parseRequest(request);
// Process the uploaded items
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (item.isFormField()) {
processFormField(item);
} else {
processUploadedFile(item);
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
private void processFormField(FileItem item) {
String name = item.getFieldName();
String value = item.getString();
System.out.println(“Item name: ” + name + ” ; value: ” + value);
}
private void processUploadedFile(FileItem item) throws Exception {
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
boolean writeToFile = true;
if (sizeInBytes > (5 * 1024 * 1024)) {
writeToFile = false;
}
// Process a file upload
if (writeToFile) {
File uploadedFile = new File(“<directory on the server’s file system>“+ fileName);
if (!uploadedFile.exists()) {
uploadedFile.createNewFile();
}
item.write(uploadedFile);
}
else {
System.out.println(“Trying to write a large file.”);
}
}
} |
