SpringBoot如何获取Base64编码的图片验证码

来源：佚名编辑：佚名

2024-05-31 13:55:55

在SpringBoot中获取Base64编码的图片验证码可以通过以下步骤实现：

创建一个Controller类来处理图片验证码的请求：

@RestController
public class CaptchaController {

    @Autowired
    private CaptchaService captchaService;

    @GetMapping("/captcha")
    public ResponseEntity<Map<String, String>> getCaptchaImage() {
        String base64Image = captchaService.generateCaptchaImage();
        Map<String, String> response = new HashMap<>();
        response.put("image", base64Image);
        return ResponseEntity.ok(response);
    }
}

创建一个CaptchaService类来生成图片验证码并将其转换为Base64编码：

@Service
public class CaptchaService {

    private Captcha captcha = new Captcha.Builder()
            .addText()
            .addBackground()
            .addNoise()
            .addBorder()
            .build();

    public String generateCaptchaImage() {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try {
            ImageIO.write(captcha.getImage(), "png", outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        byte[] imageBytes = outputStream.toByteArray();
        return Base64.getEncoder().encodeToString(imageBytes);
    }
}