#验证码图片地址，需要改成你本地的地址
#路径调试的时候，配成全路径，不要配成相对路径。相对路径打成jar包的时候，读取不到文件
#这是前后端分离方式的调用，路径应该由服务器来配置，这里需要手动配置路径。其它方式读取文件，可自行调整CaptchaServiceImpl实现类中selectSlideVerificationCode方法文件读取方式
captcha:slide-verification-code:path:template-image: "/static/templates"origin-image: "/static/targets"

import com.aliyun.oss.ServiceException;
import com.lgh.code.common.model.base.Result;
import com.lgh.universal.service.ImageVerificationService;
import com.lgh.universal.util.ImageVerificationCheckDTO;
import com.lgh.universal.util.ImageVerificationVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;import javax.validation.Valid;/*** @author: cyl* @date: 2022/3/22 16:17*/
@RestController
@RequestMapping(value = "/image/verification")
@Api(tags = "图片滑动验证码")
@Slf4j
@RequiredArgsConstructor
public class ImageVerificationController {private final ImageVerificationService service;@GetMapping("/get")@ApiOperation(value = "获取验证码")public Result getVerificationImage() {ImageVerificationVO vo;try {vo = service.selectSlideVerificationCode();} catch (ServiceException e) {return Result.fail(e.getMessage());}return Result.ok(vo);}@ApiOperation(value = "校验验证码")@PostMapping("/check")public Result checkVerificationResult(@Valid @RequestBody ImageVerificationCheckDTO dto) {return service.checkVerificationResult(dto.getX(), dto.getY());}}

import com.aliyun.oss.ServiceException;
import com.lgh.code.common.constant.RedisConstants;
import com.lgh.code.common.constant.TokenTimeConstants;
import com.lgh.code.common.context.SecurityContextHolder;
import com.lgh.code.common.model.base.Result;
import com.lgh.code.redis.service.RedisService;
import com.lgh.universal.util.ImageRead;
import com.lgh.universal.util.ImageVerificationUtil;
import com.lgh.universal.util.ImageVerificationVO;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.stereotype.Service;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.net.URL;
import java.util.Random;/*** 图片滑动验证码 业务实现类* @author: cyl* @date: 2022/3/22 16:28*/
@Service
@Slf4j
@RequiredArgsConstructor
public class ImageVerificationService {private final RedisService redisService;/*** 源图路径前缀*/@Value("${captcha.slide-verification-code.path.origin-image:classpath:static/targets}")private String verificationImagePathPrefix;/*** 模板图路径前缀*/@Value("${captcha.slide-verification-code.path.template-image:classpath:static/templates}")private String templateImagePathPrefix;/*** 获取滑动验证码** @return 滑动验证码*/public ImageVerificationVO selectSlideVerificationCode() throws ServiceException {ImageVerificationVO vo;try {//  随机取得原图文件夹中一张图片ImageRead originImageRead = readTargetImage();//  获取模板图片文件ImageRead templateImageRead = readTemplateImage(templateImagePathPrefix.concat("/template.png"));//  获取描边图片文件ImageRead borderImageRead = readBorderImageFile(templateImagePathPrefix.concat("/border.png"));//  获取原图文件类型String originImageFileType = originImageRead.getFileExtension();//  获取模板图文件类型String templateImageFileType = templateImageRead.getFileExtension();//  获取边框图文件类型String borderImageFileType = borderImageRead.getFileExtension();//  读取原图BufferedImage verificationImage = originImageRead.getImage();//  读取模板图BufferedImage readTemplateImage = templateImageRead.getImage();//  读取描边图片BufferedImage borderImage = borderImageRead.getImage();//  获取原图感兴趣区域坐标vo = ImageVerificationUtil.generateCutoutCoordinates(verificationImage, readTemplateImage);int y = vo.getY();redisService.set(RedisConstants.IMAGE_VERIFICATION + SecurityContextHolder.getUserId(), vo, TokenTimeConstants.MILLIS_MINUTES);//  根据原图生成遮罩图和切块图vo = ImageVerificationUtil.pictureTemplateCutout(verificationImage, originImageRead.getInputStream(), originImageFileType, readTemplateImage, templateImageFileType, vo.getX(), vo.getY());//   剪切图描边vo = ImageVerificationUtil.cutoutImageEdge(vo, borderImage, borderImageFileType);vo.setY(y);//  =============================================//  输出图片
//            HttpServletResponse response = getResponse();
//            response.setContentType("image/jpeg");
//            ServletOutputStream outputStream = response.getOutputStream();
//            outputStream.write(oriCopyImages);
//            BufferedImage bufferedImage = ImageIO.read(originImageFile);
//            ImageIO.write(bufferedImage, originImageType, outputStream);
//            outputStream.flush();//  =================================================} catch (Exception e) {log.error(e.getMessage(), e);throw new ServiceException(e.getMessage());}return vo;}/*** 读取目标图** @return* @throws ServiceException*/public ImageRead readTargetImage() throws ServiceException {ImageRead imageRead = null;try {Random random = new Random(System.currentTimeMillis());log.info("读取目标图: {}", verificationImagePathPrefix);ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();Resource[] resources = resolver.getResources(verificationImagePathPrefix.concat("/*"));if (resources == null) {throw new RuntimeException("not found target image");}int i = random.nextInt(resources.length);imageRead = new ImageRead();imageRead.setImage(ImageIO.read(resources[i].getInputStream()));String extension = resources[i].getFilename().substring(resources[i].getFilename().lastIndexOf(".") + 1);imageRead.setInputStream(resources[i].getInputStream());imageRead.setFileExtension(extension);log.info("读取目标图: 完成");} catch (Exception e) {log.error(e.getMessage(), e);throw new ServiceException(e.getMessage());}return imageRead;}/*** 读取模板图** @param path* @return* @throws ServiceException*/public ImageRead readTemplateImage(String path) throws ServiceException {ImageRead templateImageFile = null;try {if (templateImageFile != null) {return templateImageFile;}templateImageFile = new ImageRead();log.info("读取模板图:{}", path);ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();Resource resource = resolver.getResource(path);if (resource == null) {throw new RuntimeException("not found template image");}templateImageFile.setImage(ImageIO.read(resource.getInputStream()));String extension = resource.getFilename().substring(resource.getFilename().lastIndexOf(".") + 1);templateImageFile.setInputStream(resource.getInputStream());templateImageFile.setFileExtension(extension);log.info("读取模板图:完成");} catch (Exception e) {log.error(e.getMessage(), e);throw new ServiceException(e.getMessage());}return templateImageFile;}/*** 读取边框图** @param path* @return* @throws ServiceException*/public ImageRead readBorderImageFile(String path) throws ServiceException {ImageRead borderImageFile = null;try {if (borderImageFile != null) {return borderImageFile;}borderImageFile = new ImageRead();log.info("读取边框图:{}", path);ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();Resource resource = resolver.getResource(path);if (resource == null) {throw new RuntimeException("not found template image");}borderImageFile.setImage(ImageIO.read(resource.getInputStream()));String extension = resource.getFilename().substring(resource.getFilename().lastIndexOf(".") + 1);borderImageFile.setInputStream(resource.getInputStream());borderImageFile.setFileExtension(extension);log.info("读取边框图:完成");} catch (Exception e) {log.error(e.getMessage(), e);throw new ServiceException(e.getMessage());}return borderImageFile;}/*** 滑动验证码验证方法** @param x x轴坐标* @param y y轴坐标* @return 滑动验证码验证状态* @throws ServiceException 验证滑动验证码异常*/public Result checkVerificationResult(String x, String y) throws ServiceException {int threshold = 5;try {ImageVerificationVO vo = (ImageVerificationVO) redisService.get(RedisConstants.IMAGE_VERIFICATION + SecurityContextHolder.getUserId());if (vo != null) {if ((Math.abs(Integer.parseInt(x) - vo.getX()) <= threshold) && y.equals(String.valueOf(vo.getY()))) {redisService.delete(RedisConstants.IMAGE_VERIFICATION + SecurityContextHolder.getUserId());return Result.ok();}}} catch (Exception e) {log.error(e.getMessage(), e);throw new ServiceException(e.getMessage());}return Result.fail("图片滑动验证失败");}}