JAVA之"文件上传"

<form name="UploadForm" enctype="multipart/form-data" method="post" action="upLoadImage.do">
<input type="file" name="File1" size="11" maxlength="20"/><input type="submit"value="上 传"/>
</form>  
  String path="images\\product\\";
String temp=this.getServlet().getServletContext().getRealPath("/")+"temp"; //临时目录
String loadpath=this.getServlet().getServletContext().getRealPath("/")+path; //上传文件存放目录

DiskFileUpload fu = new DiskFileUpload();
fu.setSizeMax(10*1024*1024); // 设置允许用户上传文件大小,单位:字节
fu.setSizeThreshold(4096); // 设置最多只允许在内存中存储的数据,单位:字节
fu.setRepositoryPath(temp); // 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录

//开始读取上传信息
List fileItems = fu.parseRequest(request);

System.out.println(fileItems.size());//输出上传文件信息


Iterator iter = fileItems.iterator(); // 依次处理每个上传的文件
while (iter.hasNext())
{
FileItem item = (FileItem) iter.next();// 忽略其他不是文件域的所有表单信息
if (!item.isFormField())
{
String name = item.getName();//获取上传文件名,包括路径
name=name.substring(name.lastIndexOf("\\")+1);//从全路径中提取文件名
long size = item.getSize();
if((name==null||name.equals("")) && size==0){
request.setAttribute("uploadmessage","上传图片失败!");
return mapping.findForward("product");
}
File fNew= new File(loadpath, name);
item.write(fNew);
request.setAttribute("uploadmessage","上传图片成功!");
HttpSession session=request.getSession();
session.setAttribute("path",(path+fNew.getName()).replace("\\","/"));
System.out.println((path+fNew.getName()).replace("\\","/"));
}
}