S 2 SHでstruts 2ファイルアップロードのaction

/**
 *            。     ：        。             。
 *   struts      request，       MultiPartRequestWrapper        。
 *       kindeditor jsp  upload_json.jsp       。           ，   action     。
 * 
 * @author helei
 * @date 2014 6 20 13:54:13
 * @version v1.0
 * 
 */
public class UploadAction extends BaseStruts2Action {
	private static final long serialVersionUID = 1L;
	//   
	private File filedata;
	//       
	private String filedataContentType;
	//    
	private String filedataFileName;

	/**
	 *        action.    action               .        json     
	 *    url    type     . type=content     .type=image      
	 * 
	 * @return    ajax  .
	 * @throws FileUploadException
	 * @throws IOException
	 */
	@SuppressWarnings("unchecked")
	public void uploadImg() throws Exception {
		//         
		String savePath = getRequest().getSession().getServletContext().getRealPath("/") + "upload/";
		//       URL
		String saveUrl = getRequest().getContextPath() + "/upload/";

		//             
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp"); //           
		// extMap.put("flash", "swf,flv");
		// extMap.put("media",
		// "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		// extMap.put("file","doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

		//       ,   struts2.xml     
		long maxSize = 3000000000l;
		//          
		getResponse().setContentType("text/html; charset=UTF-8");
		//      (       ),              
		String dirName = getRequest().getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			Common.printforajax(getError("      。"));
			return;
		}
		//      
		String tpath = FileUtil.mkdirs(savePath, dirName);
		savePath += tpath;
		saveUrl += tpath;
		
		if (!ServletFileUpload.isMultipartContent(getRequest())) {
			Common.printforajax(getError("     。"));
			return;
		}
		//     
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			Common.printforajax(getError("       。"));
			return;
		}
		//        
		if (!uploadDir.canWrite()) {
			Common.printforajax(getError("         。"));
			return;
		}
		
		//           
		String fileExt = filedataFileName.substring(filedataFileName.lastIndexOf(".") + 1).toLowerCase();
		if (!Arrays.<String> asList(extMap.get(dirName).split(",")).contains(fileExt)) {
			Common.printforajax(getError("               。
   " + extMap.get(dirName)+ "  。"));
		}
		//       
		if (filedata.length() > maxSize) {
			Common.printforajax(getError("          。"));
		    return;
		}
		
		//           :   +     
		String newFileName = FileUtil.createNewFileName(filedataFileName);
		//             
		InputStream in = new FileInputStream(filedata);
		OutputStream fos = new FileOutputStream(savePath + newFileName);

		byte[] buffer = new byte[1024 * 1024];
		int length = 0;
		while (-1 != (length = in.read(buffer))) {
			fos.write(buffer, 0, length);

		}
		fos.close();
		in.close();

		saveUrl += newFileName;
		JSONObject obj = new JSONObject();
		
		obj.put("err", 0);
		obj.put("msg", saveUrl);
		Common.printforajax(obj.toJSONString());
	}

	public File getFiledata() {
		return filedata;
	}

	public void setFiledata(File filedata) {
		this.filedata = filedata;
	}

	public String getFiledataContentType() {
		return filedataContentType;
	}

	public void setFiledataContentType(String filedataContentType) {
		this.filedataContentType = filedataContentType;
	}

	public String getFiledataFileName() {
		return filedataFileName;
	}

	public void setFiledataFileName(String filedataFileName) {
		this.filedataFileName = filedataFileName;
	}

	/**
	 *       ,     
	 * 
	 * @param message
	 *                  
	 * @return
	 */
	@SuppressWarnings("unchecked")
	private String getError(String message) {
		JSONObject obj = new JSONObject();
		obj.put("err", "-1");
		obj.put("msg", message);
		return obj.toJSONString();
	}