鉴权

src/main/java/cn/van/business/service/CaptchaService.java

@@ -0,0 +1,32 @@
+package cn.van.business.service;
+
+import com.google.code.kaptcha.Producer;
+import org.springframework.stereotype.Service;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.util.Base64;
+
+@Service
+public class CaptchaService {
+
+    private final Producer kaptchaProducer;
+
+    public CaptchaService(Producer kaptchaProducer) {
+        this.kaptchaProducer = kaptchaProducer;
+    }
+
+    public String generateCaptchaImage() throws Exception {
+        String text = kaptchaProducer.createText();
+        BufferedImage image = kaptchaProducer.createImage(text);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        ImageIO.write(image, "PNG", outputStream);
+        return Base64.getEncoder().encodeToString(outputStream.toByteArray());
+    }
+
+    public boolean validateCaptcha(String userInput, String generatedCaptcha) {
+        return userInput.equalsIgnoreCase(generatedCaptcha);
+    }
+}