1、修改图形验证码的字体，以便在linux中使用

application/src/main/java/com/ctsi/utils/CaptchaUtil.java

@@ -25,7 +25,7 @@ public class CaptchaUtil {
         g.drawRect(0, 0, WIDTH - 1, HEIGHT - 1);
 
         String captcha = generateRandomString();
-        g.setFont(new Font("DejaVu Sans", Font.PLAIN, 20));
+        g.setFont(new Font(Font.DIALOG, Font.PLAIN, 20));
         for (int i = 0; i < LENGTH; i++) {
             g.setColor(new Color(new Random().nextInt(255), new Random().nextInt(255), new Random().nextInt(255)));
             g.drawString(String.valueOf(captcha.charAt(i)), 20 * i + 10, 30);