图片上传工具类

/** * Author: fuchunyu * Date: 2017/6/19 * Description：fileInput上传专用接口 */public class UploadImage extends HttpServlet {    private static final long serialVersionUID = 1L;    public static String getFilePath() {        return "file/" + Convert.toShortYMDWithNoSplit(new Date()) + "/";    }    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        processRequest(request, response);    }    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        processRequest(request, response);    }    private void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {        response.setCharacterEncoding("UTF-8");        ServletOutputStream os = response.getOutputStream();        // 获得文件保存路径    /*  String filePath = getFilePath();        String path = getTempPath(filePath);        */        // 临时文件目录        File temp = new File("/usr/local/temp/upload/");        if (!temp.exists())            temp.mkdirs();        // 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload        DiskFileItemFactory factory = new DiskFileItemFactory(5 * 1024 * 1024, temp);        // 用以上工厂实例化上传组件        ServletFileUpload sfu = new ServletFileUpload(factory);        // 单个文件最大值        sfu.setSizeMax(5* 1024 * 1024);        List fileList = null;        try {            fileList = sfu.parseRequest(request);        } catch (FileUploadException e) {            if (e instanceof SizeLimitExceededException) {                os.write("文件太大了".getBytes("UTF-8"));                os.close();                return;            } else {                os.write("未知异常".getBytes("UTF-8"));                os.close();                return;            }        }        if (fileList == null || fileList.size() == 0) {            os.write("请上传文件".getBytes("UTF-8"));            os.close();            return;        }        String fileNames = null;        Iterator iter = fileList.iterator();        while (iter.hasNext()) {            FileItem item = (FileItem) iter.next();            if (!item.isFormField()) {                String fileName = item.getName();                if(fileName.lastIndexOf('.') == -1){                    return;                }                String fileExt = fileName.substring(fileName.lastIndexOf('.'));                if (!".png.jpg.jpeg.gif.bmp".contains(fileExt.toLowerCase())) {                    os.write("文件类型错误".getBytes("UTF-8"));                    os.close();                    return;                }                fileName = getFileName() + fileExt;                try {                    // 这里将图片上传到oos服务器上面服务器上面                    File file = File.createTempFile(fileName, fileExt);                    file.deleteOnExit();                    item.write(file);                    //file.delete();                    //item.write(new File(path, fileName));                } catch (OSSException oe) {                    System.out.println("Caught an OSSException, which means your request made it to OSS, "                            + "but was rejected with an error response for some reason.");                    System.out.println("Error Message: " + oe.getErrorCode());                    System.out.println("Error Code:       " + oe.getErrorCode());                    System.out.println("Request ID:      " + oe.getRequestId());                    System.out.println("Host ID:           " + oe.getHostId());                } catch (ClientException ce) {                    System.out.println("Caught an ClientException, which means the client encountered "                            + "a serious internal problem while trying to communicate with OSS, "                            + "such as not being able to access the network.");                    System.out.println("Error Message: " + ce.getMessage());                } catch (Exception e) {                    e.printStackTrace();                    continue;                } finally {            /*             * Do not forget to shut down the client finally to release all allocated resources.             */                    client.shutdown();                }                //  fileName = AppConfig.RESOURCE_APP_ROOT + filePath + fileName;                if (fileNames == null)                    fileNames = fileName;                else                    fileNames += "," + fileName;            }        }        os.write(("success" + "|"+ImagePath + fileNames).getBytes("UTF-8"));        os.close();        return;    }    public static String getTempPath(String filePath) {        String projectName = AppConfig.PROJECT_NAME;        String ret = AppConfig.getResourceHome();        String contextPath = AppConfig.getContextPath();        if (!contextPath.equals(projectName) && ret.contains(projectName)) {            ret = ret.substring(0, ret.indexOf(projectName) - 1);        }        String path = ret + AppConfig.RESOURCE_APP_ROOT + filePath;        // 文件上传目录        File sourceFile = new File(path);        if (!sourceFile.exists()) {            sourceFile.mkdirs();        }        return path;    }    /**     * 获取文件名     * UUID 拼接 8位日期     *     * 如需获得原图，可将图片名称截后六位即图片创建日期，然后到file文件夹下根据日期即可找到     * @return     */    public static String getFileName(){        String uuid = UUID.randomUUID().toString().replace("-", "");        String time = Convert.toShortYMDWithNoSplit(new Date());        return uuid + time;    }}