若是Servlet的话就可以用fileupload，Struts2有自己的上传工具
public class FileBiz {
public void upload(HttpServletRequest request,String uploadPath) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhhmmss");
File tmpDir = new File("d:\\temp"); //初始化上传文件的临时存放目录,必须是绝对路径
try {
if (ServletFileUpload.isMultipartContent(request)) {
DiskFileItemFactory factory = new DiskFileItemFactory();
//指定在内存中缓存数据大小,单位为byte,这里设为1Mb
factory.setSizeThreshold(1 * 1024 * 1024);
//设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
factory.setRepository(tmpDir);
ServletFileUpload sfu = new ServletFileUpload(factory);
// 指定单个上传文件的最大尺寸,单位:字节，这里设为5Mb
sfu.setFileSizeMax(5 * 1024 * 1024);
//指定一次上传多个文件的总尺寸,单位:字节，这里设为10Mb
sfu.setSizeMax(10 * 1024 * 1024);
sfu.setHeaderEncoding("UTF-8"); //设置编码，因为我的jsp页面的编码是utf-8的
FileItemIterator fii = sfu.getItemIterator(request);// 解析request请求
uploadPath = uploadPath + "upload\\"; // 选定上传的目录此处为当前目录
if (!new File(uploadPath).isDirectory()){
new File(uploadPath).mkdirs(); //选定上传的目录此处为当前目录，没有则创建
}
int index = 0;
while (fii.hasNext()) {
FileItemStream fis = fii.next();// 从集合中获得一个文件流
if (!fis.isFormField() && fis.getName().length() > 0) {// 过滤掉表单中非文件域
String fileName = fis.getName().substring(
fis.getName().lastIndexOf("."));// 获得上传文件的文件名
fileName = sdf.format(new Date())+"-"+index+fileName;
BufferedInputStream in = new BufferedInputStream(fis.openStream());
BufferedOutputStream out = new BufferedOutputStream(
new FileOutputStream(new File(uploadPath + "\\" + fileName)));
Streams.copy(in, out, true); // 开始把文件写到你指定的上传文件夹
index++;
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
