Flex实现多文件上传之二：后台部分(java)
这里说一下后台是如何处理上传文件的，用的是java。
上传的功能使用了apache的通用jar包，可以在这里下载。
java代码如下，简单说明下：
1.设置上传目录，这个目录是指web服务器所在机器的目录
2.防止乱码的设置
3.上传功能写在action里，示例直接使用了默认的方法名doPost，如果你要用struts之类的，可以定义自己的方法名称
package com.nstar.orderexpress.web;
import javax.servlet.http.HttpServlet;
import org.apache.log4j.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import java.util.List;
import org.apache.commons.fileupload.FileUploadException;
import java.util.Iterator;
import org.apache.commons.fileupload.FileItem;
import java.io.File;
import java.io.UnsupportedEncodingException;
import org.apache.commons.lang.ObjectUtils;
public class FileUploadAction extends HttpServlet{
??? private static Logger logger = Logger.getLogger(FileUploadAction.class.getName());
??? private int maxPostSize = 100 * 1024 * 1024;
??? private String uploadPath = "D:\\upload\";
??? public FileUploadAction() {
??? }
??? //文件上传
??? public void doPost(HttpServletRequest request, HttpServletResponse response)
??????? throws ServletException {
??????? logger("begin upload");
??????? try {
??? request.setCharacterEncoding("UTF-8");//防止文件名称带有汉字后传到服务器乱码
?? } catch (UnsupportedEncodingException e) {
??? // TODO Auto-generated catch block
??? e.printStackTrace();
?? }
??????? response.setContentType("text/html; charset=UTF-8");
??????? DiskFileItemFactory factory = new DiskFileItemFactory();
??????? factory.setSizeThreshold(1024 * 4);
??????? ServletFileUpload upload = new ServletFileUpload(factory);
??????? upload.setFileSizeMax(maxPostSize);
??????? logger("request================"+ObjectUtils.toString(request));
??????? List fileItems = null;
??????? try {
??????????? fileItems = upload.parseRequest(request);
??????????? logger("===================="+ObjectUtils.toString(fileItems));
??????????? Iterator iter = fileItems.iterator();
??????????? while (iter.hasNext()) {
??????????????? FileItem item = (FileItem) iter.next();
??????????????? log(item.toString());
??????????????? if (!item.isFormField()) {
??????????????????? String name = item.getName();
??????????????????? logger("file name = "+name);
??????????????????? try {
??????????????????????? item.write(new File(uploadPath + name));
??????????????????? }
??????????????????? catch (Exception ex) {
??????????????????????? logger(ex.getMessage());
??????????????????? }
??????????????? }
??????????? }
??????? }
??????? catch (FileUploadException ex1) {
??????????? logger("FileUploadException->"+ex1.getMessage());
??????? }
??? }
??? private void logger(String info){
??????? System.out.println(info);
??? }
}
文件上传基本上就这么多了，可以在此基础上去扩展你想要的功能。
