flex和java做的图片上传的小例子

用的是Commons上传组件，下载地址：Commons
网上找的小例子改的，修改了部分错误。
1，FileUpload.java
package com.fileupload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class FileUpload extends HttpServlet {
// 限制文件的上传大小
private int maxPostSize = 100 * 1024 * 1024;
public FileUpload() {
super();
}
public void destroy() {
super.destroy();
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
System.out.println("开始!");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(4096);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setSizeMax(maxPostSize);
try {
request.setCharacterEncoding("UTF-8");
List fileItems = upload.parseRequest(request);
Iterator iter = fileItems.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (!item.isFormField()) {
String name = item.getName();
System.out.println(name);
String uploadPath = null;
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
uploadPath = request.getRealPath("/");
System.out.println(uploadPath);
item.write(new File(uploadPath +"uploadfile/"+ name));
out.print(name+"上传成功");
}
}
} catch (FileUploadException e) {
e.printStackTrace();
}
System.out.println("结束");
}
prot