<%@ page contentType="text/html; charset=GBK"%>

<%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>

<%@ page import="java.io.File"%>

<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>

<%@ page import="java.util.List"%>

<%@ page import="org.apache.commons.fileupload.FileItem"%>

<%@ page import="java.io.FileOutputStream"%>

<%@ page import="java.io.InputStream"%>

<%

    DiskFileItemFactory factory = new DiskFileItemFactory();

    //设置上传工厂的限制

    //设置上传文件的最大大小

    factory.setSizeThreshold(1024 * 1024 * 20);

    //设置保存文件的路径

    factory.setRepository(new File(request.getSession()

           .getServletContext().getRealPath("/")));

    //创建上传文件的ServletFileUpload对象

    ServletFileUpload upload = new ServletFileUpload(factory);

    //设置最大的上传限制

    upload.setSizeMax(1024 * 1024 * 20);

    //处理HTTP请求，items是所有的表单项(解析请求对象，获得所有请求的表单项数据)

    List items = upload.parseRequest(request);

    //遍历所有的表单项

    for (int i = 0; i < items.size(); i++) {

       FileItem item = (FileItem) items.get(i);

       //判断该表单项是否为一个普通表单项(非File类型控件)

       if (item.isFormField()) {

           String name = item.getFieldName();//获得表单项的名字

           String value = item.getString("GBK");//以GBK编码获得表单项输入数据

           out.println(name + " = " + value);

       } else {

           //代表该表单域是一个文件域

           //取得文件域的表单域名

           String fieldName = item.getFieldName();

           //获得上传的文件名

           String fileName = item.getName();

           fileName = request.getSession().getServletContext()

                  .getRealPath("/")

                  + System.currentTimeMillis()

                  + fileName.substring(fileName.lastIndexOf("."),

                         fileName.length());

           String contentType = item.getContentType();

           //以当前时间来生成上传文件的文件名

           FileOutputStream fout = new FileOutputStream(fileName);

           //如果上传文件域对应文件的内容已经在内存中

           if (item.isInMemory()) {

              fout.write(item.get());

           }

           //如果文件内容不完全在内存中

           else {

              //获取上传文件内容的输入流

              InputStream is = item.getInputStream();

              byte[] buffer = new byte[1024];

              int length = is.read(buffer);

              while (length == 1024) {

                  fout.write(buffer);

              }

              fout.write(buffer, 0, length);

              is.close();

              fout.close();

           }

       }

    }

%>