如何修改文件上传时的路径

Question

package photo;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.util.Iterator;import java.util.List;import java.util.regex.Matcher;import java.util.regex.Pattern; 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;/** *  * @author zhupan * */public class Upload extends HttpServlet {     /**      *       */     private static final long serialVersionUID = 1L;      public void doPost(HttpServletRequest request, HttpServletResponse response)              throws ServletException, IOException {         response.setContentType("text/html; charset=GB2312");         PrintWriter out = response.getWriter();         try {              DiskFileItemFactory factory = new DiskFileItemFactory();               ServletFileUpload sevletFileUpload = new ServletFileUpload(factory);              // 设置允许用户上传文件大小,单位:字节，这里设为2m              sevletFileUpload.setSizeMax(2 * 1024 * 1024);              // 设置最多只允许在内存中存储的数据,单位:字节              factory.setSizeThreshold(4096);              // 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(new File("d:\\temp"));              // 开始读取上传信息               List fileItems = sevletFileUpload.parseRequest(request);              // 依次处理每个上传的文件              Iterator iter = fileItems.iterator();               // 正则匹配，过滤路径取文件名              String regExp = ".+\\\\(.+)$";               // 过滤掉的文件类型              String[] errorType = { ".exe", ".com", ".cgi", ".asp" };              Pattern p = Pattern.compile(regExp);              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();                       long size = item.getSize();                       if ((name == null || name.equals("")) && size == 0)                            continue;                       Matcher m = p.matcher(name);                       boolean result = m.find();                       if (result) {                            for (int temp = 0; temp < errorType.length; temp++) {                                 if (m.group(1).endsWith(errorType[temp])) {                                     throw new IOException(name + ": 非法文件类型禁止上传");                                 }                            }                            try {                                 // 保存上传的文件到指定的目录                                 // 在下文中上传文件至数据库时，将对这里改写开始                                 item.write(new File("d:\\uploadfile\\"+ m.group(1)));                                  out.print(name + "&nbsp;&nbsp;" + size + "<br>");                                 // 在下文中上传文件至数据库时，将对这里改写结束                            } catch (Exception e) {                                 out.println(e);                            }                        } else {                            throw new IOException("fail to upload");                       }                   }              }         } catch (IOException e) {              out.println(e);         } catch (FileUploadException e) {              out.println(e);         }      }}
 item.write(new File("d:\\uploadfile\\"+ m.group(1)));这个地方是怎么改成虚拟路径我改成（"../uploadfile"）就说找不到该文件夹急用，我是刚注册的不知道能不能给大家加分

Answer 1

应该是路径不对，你在前面加入这样的代码试试
//获得服务器应用程序所在的绝对路径
    String realPath = this.getServletContext().getRealPath(this.
            getServletName());
    realPath = realPath.substring(0, realPath.lastIndexOf("\\"));
    String uploadPath = realPath + "\\upload\\"; // 用于存放上传文件的目录    //如果目录不存在则创建目录
    File uploadPathDir = new File(uploadPath);
    if (!uploadPathDir.exists()) {
        uploadPathDir.mkdirs();
    }
试试看