java登录滑动图片验证 js+java实现登录滑动图片验证

@LogAnnotation(description = "web获取滑动图片信息")
 @ApiOperation(value = "web获取滑动图片信息", httpMethod = "POST", response = Result.class, notes = "")
 @RequiresPermissions(value = "code/picture/msg")
 @RequestMapping(value = "code/picture/msg", method = RequestMethod.POST)
 @ResponseBody
 public Response getPictureCode(HttpServletRequest request) {
 Map<String, Object> pictureMap = new HashMap<>();
 try {
 //随机获取需要切成的图片形状
 Integer templateNum = new Random().nextInt(10) + 1;
 String randomStr = String.valueOf(templateNum);
 if(templateNum < 10){
 randomStr = "0"+randomStr;
 }
 InputStream tempInputStream = FileUtils.downloadFtpFile(Constant.POCTURE_CHECK_PATH,randomStr+".jpg");
 //根据源图片和抠图形状生成新的图片信息以流的形式返回到前端
 pictureMap = VerifyImageUtil.getVerifyImage(tempInputStream);
 //将剪裁好了以后的图片信息以当前时间戳为key，存入redis（这一步是为了对图片信息做过期处理，根据自己需求做）
 String tempTime = String.valueOf(System.currentTimeMillis());
 redisUtils.hset(Constant.REDIS_LOGIN_PICTURE_CODE, tempTime,pictureMap.get("locationX").toString(),60);
 pictureMap.put("tempTime",tempTime);
 //移出随机生成的抠图位置坐标，不返回给前端
 pictureMap.remove("locationX");
 return new ObjectResponse<Map<String, Object>>(pictureMap);
 }catch(Exception e){
 logger.error("code/picture/msg", e);
 return new FailedResponse();
 }
 }

public static FTPClient ftpLogin(){
 String ip = p.getProperty("ftp的ip");
 String username = p.getProperty("ftp的user");
 String password = p.getProperty("ftp的pwd");
 int ftpPort = Integer.parseInt(p.getProperty("ftp的port"));
 FTPClient ftpClient = new FTPClient();
 try { 
  ftpClient.connect(ip , ftpPort );// 连接FTP服务器 
  ftpClient.login(username , password );// 登陆FTP服务器 
  if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) { 
  ftpClient.disconnect(); 
  }
 } catch (SocketException e) { 
  e.printStackTrace(); 
 } catch (IOException e) { 
  e.printStackTrace(); 
 } 
 return ftpClient;
 }
 
public static InputStream downloadFtpFile(String ftpPath, String fileName) { 
 FTPClient ftpClient = ftpLogin();
 try {
  ftpClient.setControlEncoding("UTF-8"); // 中文支持 
  ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 
  ftpClient.enterLocalPassiveMode(); 
  ftpClient.changeWorkingDirectory(ftpPath); 
  InputStream inputStream = ftpClient.retrieveFileStream(new String(fileName.getBytes("UTF-8"), "ISO-8859-1"));
  //ftpClient.completePendingCommand();
  return inputStream;
 } catch (Exception e) { 
  e.printStackTrace(); 
 }finally {
  try {
 ftpClient.logout();
 } catch (IOException e) {
 e.printStackTrace();
 } 
 }
 return null;
 } 

public class VerifyImageUtil {
 
 /**
 * 源文件宽度
 */
 private static int ORI_WIDTH = 296;
 /**
 * 源文件高度
 */
 private static int ORI_HEIGHT = 182;
 /**
 * 模板图宽度
 */
 private static int CUT_WIDTH = 50;
 /**
 * 模板图高度
 */
 private static int CUT_HEIGHT = 50;
 /**
 * 抠图凸起圆心
 */
 private static int circleR = 6;
 /**
 * 抠图内部矩形填充大小
 */
 private static int RECTANGLE_PADDING = 6;
 /**
 * 抠图的边框宽度
 */
 private static int SLIDER_IMG_OUT_PADDING = 1;
 
 
 /**
 * 根据传入的路径生成指定验证码图片
 *
 * @param filePath
 * @return
 * @throws IOException
 */
 public static Map<String, Object> getVerifyImage(InputStream filePath) throws IOException {
 BufferedImage srcImage = ImageIO.read(filePath);
 int locationX = CUT_WIDTH + new Random().nextInt(srcImage.getWidth() - CUT_WIDTH * 2);
 int locationY = CUT_HEIGHT + new Random().nextInt(srcImage.getHeight() - CUT_HEIGHT) / 2;
 BufferedImage markImage = new BufferedImage(CUT_WIDTH,CUT_HEIGHT,BufferedImage.TYPE_4BYTE_ABGR);
 int[][] data = getBlockData();
 cutImgByTemplate(srcImage, markImage, data, locationX, locationY);
 Map<String, Object> resultMap = new HashMap<>();
 //放入背景图的加密信息
 resultMap.put("srcImage",getImageBASE64(srcImage));
 //放入滑块图的加密信息
 resultMap.put("markImage",getImageBASE64(markImage));
 //放入抠图位置的X方向的信息，用于验证滑块位置是否正确
 resultMap.put("locationX",locationX);
 //放入抠图位置的Y方向的信息，用于前端控制定位信息
 resultMap.put("locationY",locationY);
 return resultMap;
 }
 
 
 /**
 * 生成随机滑块形状
 * <p>
 * 0 透明像素
 * 1 滑块像素
 * 2 阴影像素
 * @return int[][]
 */
 private static int[][] getBlockData() {
 int[][] data = new int[CUT_WIDTH][CUT_HEIGHT];
 Random random = new Random();
 //(x-a)²+(y-b)²=r²
 //x中心位置左右5像素随机
 double x1 = RECTANGLE_PADDING + (CUT_WIDTH - 2 * RECTANGLE_PADDING) / 2.0 - 5 + random.nextInt(10);
 //y 矩形上边界半径-1像素移动
 double y1_top = RECTANGLE_PADDING - random.nextInt(3);
 double y1_bottom = CUT_HEIGHT - RECTANGLE_PADDING + random.nextInt(3);
 double y1 = random.nextInt(2) == 1 ? y1_top : y1_bottom;
 
 
 double x2_right = CUT_WIDTH - RECTANGLE_PADDING - circleR + random.nextInt(2 * circleR - 4);
 double x2_left = RECTANGLE_PADDING + circleR - 2 - random.nextInt(2 * circleR - 4);
 double x2 = random.nextInt(2) == 1 ? x2_right : x2_left;
 double y2 = RECTANGLE_PADDING + (CUT_HEIGHT - 2 * RECTANGLE_PADDING) / 2.0 - 4 + random.nextInt(10);
 
 double po = Math.pow(circleR, 2);
 for (int i = 0; i < CUT_WIDTH; i++) {
 for (int j = 0; j < CUT_HEIGHT; j++) {
 //矩形区域
 boolean fill;
 if ((i >= RECTANGLE_PADDING && i < CUT_WIDTH - RECTANGLE_PADDING)
 && (j >= RECTANGLE_PADDING && j < CUT_HEIGHT - RECTANGLE_PADDING)) {
 data[i][j] = 1;
 fill = true;
 } else {
 data[i][j] = 0;
 fill = false;
 }
 //凸出区域
 double d3 = Math.pow(i - x1, 2) + Math.pow(j - y1, 2);
 if (d3 < po) {
 data[i][j] = 1;
 } else {
 if (!fill) {
 data[i][j] = 0;
 }
 }
 //凹进区域
 double d4 = Math.pow(i - x2, 2) + Math.pow(j - y2, 2);
 if (d4 < po) {
 data[i][j] = 0;
 }
 }
 }
 //边界阴影
 for (int i = 0; i < CUT_WIDTH; i++) {
 for (int j = 0; j < CUT_HEIGHT; j++) {
 //四个正方形边角处理
 for (int k = 1; k <= SLIDER_IMG_OUT_PADDING; k++) {
 //左上、右上
 if (i >= RECTANGLE_PADDING - k && i < RECTANGLE_PADDING
 && ((j >= RECTANGLE_PADDING - k && j < RECTANGLE_PADDING)
 || (j >= CUT_HEIGHT - RECTANGLE_PADDING - k && j < CUT_HEIGHT - RECTANGLE_PADDING +1))) {
 data[i][j] = 2;
 }
 
 //左下、右下
 if (i >= CUT_WIDTH - RECTANGLE_PADDING + k - 1 && i < CUT_WIDTH - RECTANGLE_PADDING + 1) {
 for (int n = 1; n <= SLIDER_IMG_OUT_PADDING; n++) {
 if (((j >= RECTANGLE_PADDING - n && j < RECTANGLE_PADDING)
  || (j >= CUT_HEIGHT - RECTANGLE_PADDING - n && j <= CUT_HEIGHT - RECTANGLE_PADDING ))) {
 data[i][j] = 2;
 }
 }
 }
 }
 
 if (data[i][j] == 1 && j - SLIDER_IMG_OUT_PADDING > 0 && data[i][j - SLIDER_IMG_OUT_PADDING] == 0) {
 data[i][j - SLIDER_IMG_OUT_PADDING] = 2;
 }
 if (data[i][j] == 1 && j + SLIDER_IMG_OUT_PADDING > 0 && j + SLIDER_IMG_OUT_PADDING < CUT_HEIGHT && data[i][j + SLIDER_IMG_OUT_PADDING] == 0) {
 data[i][j + SLIDER_IMG_OUT_PADDING] = 2;
 }
 if (data[i][j] == 1 && i - SLIDER_IMG_OUT_PADDING > 0 && data[i - SLIDER_IMG_OUT_PADDING][j] == 0) {
 data[i - SLIDER_IMG_OUT_PADDING][j] = 2;
 }
 if (data[i][j] == 1 && i + SLIDER_IMG_OUT_PADDING > 0 && i + SLIDER_IMG_OUT_PADDING < CUT_WIDTH && data[i + SLIDER_IMG_OUT_PADDING][j] == 0) {
 data[i + SLIDER_IMG_OUT_PADDING][j] = 2;
 }
 }
 }
 return data;
 }
 
 /**
 * 裁剪区块
 * 根据生成的滑块形状，对原图和裁剪块进行变色处理
 * @param oriImage 原图
 * @param targetImage 裁剪图
 * @param blockImage 滑块
 * @param x  裁剪点x
 * @param y  裁剪点y
 */
 private static void cutImgByTemplate(BufferedImage oriImage, BufferedImage targetImage, int[][] blockImage, int x, int y) {
 for (int i = 0; i < CUT_WIDTH; i++) {
 for (int j = 0; j < CUT_HEIGHT; j++) {
 int _x = x + i;
 int _y = y + j;
 int rgbFlg = blockImage[i][j];
 int rgb_ori = oriImage.getRGB(_x, _y);
 // 原图中对应位置变色处理
 if (rgbFlg == 1) {
 //抠图上复制对应颜色值
 targetImage.setRGB(i,j, rgb_ori);
 //原图对应位置颜色变化
 oriImage.setRGB(_x, _y, rgb_ori & 0x363636);
 } else if (rgbFlg == 2) {
 targetImage.setRGB(i, j, Color.WHITE.getRGB());
 oriImage.setRGB(_x, _y, Color.GRAY.getRGB());
 }else if(rgbFlg == 0){
 //int alpha = 0;
 targetImage.setRGB(i, j, rgb_ori & 0x00ffffff);
 }
 }
 
 }
 }
 
 
 /**
 * 随机获取一张图片对象
 * @param path
 * @return
 * @throws IOException
 */
 public static BufferedImage getRandomImage(String path) throws IOException {
 File files = new File(path);
 File[] fileList = files.listFiles();
 List<String> fileNameList = new ArrayList<>();
 if (fileList!=null && fileList.length!=0){
 for (File tempFile:fileList){
 if (tempFile.isFile() && tempFile.getName().endsWith(".jpg")){
 fileNameList.add(tempFile.getAbsolutePath().trim());
 }
 }
 }
 Random random = new Random();
 File imageFile = new File(fileNameList.get(random.nextInt(fileNameList.size())));
 return ImageIO.read(imageFile);
 }
 
 /**
 * 将IMG输出为文件
 * @param image
 * @param file
 * @throws Exception
 */
 public static void writeImg(BufferedImage image, String file) throws Exception {
 byte[] imagedata = null;
 ByteArrayOutputStream bao=new ByteArrayOutputStream();
 ImageIO.write(image,"png",bao);
 imagedata = bao.toByteArray();
 FileOutputStream out = new FileOutputStream(new File(file));
 out.write(imagedata);
 out.close();
 }
 
 /**
 * 将图片转换为BASE64
 * @param image
 * @return
 * @throws IOException
 */
 public static String getImageBASE64(BufferedImage image) throws IOException {
 ByteArrayOutputStream out = new ByteArrayOutputStream();
 ImageIO.write(image,"png",out);
 //转成byte数组
 byte[] bytes = out.toByteArray();
 BASE64Encoder encoder = new BASE64Encoder();
 //生成BASE64编码
 return encoder.encode(bytes);
 }
 
 /**
 * 将BASE64字符串转换为图片
 * @param base64String
 * @return
 */
 public static BufferedImage base64StringToImage(String base64String) {
 try {
 BASE64Decoder decoder=new BASE64Decoder();
 byte[] bytes1 = decoder.decodeBuffer(base64String);
 ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);
 return ImageIO.read(bais);
 } catch (IOException e) {
 e.printStackTrace();
 }
 return null;
 }
}

// 设置图片的src属性
 $("#背景图的ID").attr("src", "data:image/png;base64," + result.datas.srcImage);
 $("#滑块图的ID").attr("src", "data:image/png;base64," + result.datas.markImage);
 $("#滑块图的ID").css("top", result.datas.locationY);
 /* 初始化按钮拖动事件 */
 // 鼠标点击事件
 $("#滑块拖动条").mousedown(function(e) {
 e = e || window.event;
 // 鼠标在滑块按下切换滑块背景
 var left = e.pageX;//记录鼠标按下时的坐标 X轴值
 var num = 0;
 // 鼠标移动事件
 document.onmousemove = function(e) {
 var nowLeft = e.pageX;
 num = nowLeft-left;
 if(num <= 0){
 num = 0;
 }else if(num >= 251){
 num= 251;
 }
 $("#滑块拖动条").css("width", (42+num) + "px");
 $("#滑块拖动条图片").css("left", (num) + "px");
 $("#滑块拖动条").css("background-color", "#3c55ff");
 };
 // 鼠标松开事件
 document.onmouseup = function(e) {
 left = 0;
 document.onmousemove = null;
 document.onmouseup = null;
   //松开以后进行后续的验证......
 
 };
 });