我用struts2+uploadify上传时，为什么后台得到我文件类型全部都是application/octet-stream

Pbulic 2011-11-16 04:24:16

struts.xml

<action name="upload" class="com.cnspot.action.UploadAction" method="upload"></action>



private static final int BUFFER_SIZE = 122880;

	private static final String FILE_TYPE = "image/jpeg,image/pjpeg";

	private File myFile;

	private String myFileContentType;

	private String myFileFileName;

	private String imageMyFileName;

	private String caption;



	public File getMyFile() {

		return myFile;

	}



	public void setMyFile(File myFile) {

		this.myFile = myFile;

	}



	public String getMyFileContentType() {

		return myFileContentType;

	}



	public void setMyFileContentType(String myFileContentType) {

		this.myFileContentType = myFileContentType;

	}



	public String getMyFileFileName() {

		return myFileFileName;

	}



	public void setMyFileFileName(String myFileFileName) {

		this.myFileFileName = myFileFileName;

	}



	public String getImageMyFileName() {

		return imageMyFileName;

	}



	public void setImageMyFileName(String imageMyFileName) {

		this.imageMyFileName = imageMyFileName;

	}



	public String getCaption() {

		return caption;

	}



	public void setCaption(String caption) {

		this.caption = caption;

	}



	/**

	 * 替换文件上传中出现的错误信息 　

	 */

	/*

	 * @Override public void addActionError(String anErrorMessage) { //

	 * 这里要先判断一下，是我们要替换的错误，才处理 if

	 * (anErrorMessage.startsWith("the　request　was　rejected　because　its　size"))

	 * { // 这些只是将原信息中的文件大小提取出来。 Matcher m =

	 * Pattern.compile("\\d+").matcher(anErrorMessage); String s1 = ""; if

	 * (m.find()) { s1 = m.group(); } String s2 = ""; if (m.find()) { s2 =

	 * m.group();// 偷梁换柱，将信息替换掉 　　 super.addActionError("你上传的文件（" + s1 +

	 * "）超过允许的大小（" + s2 + "）"); } else {// 不是则不管它

	 * super.addActionError(anErrorMessage); } } }

	 */

	private static void copy(File src, File dst) {

		try {

			InputStream in = null;

			OutputStream out = null;

			try {

				in = new BufferedInputStream(new FileInputStream(src),

						BUFFER_SIZE);

				out = new BufferedOutputStream(new FileOutputStream(dst),

						BUFFER_SIZE);

				byte[] buffer = new byte[BUFFER_SIZE];

				while (in.read(buffer) > 0) {

					out.write(buffer);

				}

			} finally {

				if (null != in) {

					in.close();

				}

				if (null != out) {

					out.close();

				}

			}

		} catch (Exception e) {

			e.printStackTrace();

		}

	}



	public void upload() throws Exception {

		response.setHeader("ContentType", "text/json");

		response.setCharacterEncoding("UTF-8");

		PrintWriter pw = response.getWriter();

		System.out.println(myFileFileName);

		System.out.println(myFileContentType);//这里输出为：application/octet-stream		System.out.println(myFile.length());

		if (FILE_TYPE.indexOf(myFileContentType) == -1) {

			pw.write("{\"error\":\"-1\"}");

			pw.flush();

			pw.close();

		} else if (myFile.length() > 122880) {// 120K

			pw.write("{\"error\":\"-2\"}");

			pw.flush();

			pw.close();

		} else {

			imageMyFileName = new Date().getTime()

					+ uploadService.getExtention(myFileFileName).toLowerCase();

			String uploadRoot = ServletActionContext.getServletContext()

					.getRealPath("/temp");

			System.out.println(uploadRoot);

			String tempPath = uploadService.tempPath(uploadRoot);

			ScaleImage is = new ScaleImage();

			is.saveImageAsJpg(myFile.toString(), tempPath + "big"

					+ imageMyFileName, 300, 300);

			is.saveImageAsJpg(myFile.toString(), tempPath + "small"

					+ imageMyFileName, 100, 100);

			String imgPath = tempPath.replace(uploadRoot, "");

			System.out.println(imgPath + "===");

			pw.write("{\"msg\":\"/cnspot/temp" + imgPath + "small"

					+ imageMyFileName + "\",\"error\":\"\"}");

			pw.flush();

			pw.close();

		}

	}