update 验证码减法的错误

src/main/java/com/ifacebox/web/admin/master/controller/MasterViewController.java

@@ -40,6 +40,9 @@ public class MasterViewController extends BaseViewController {
         response.setHeader("Pragma", "no-cache");
         response.setContentType("image/jpeg");
         String text = calcMathCaptcha.getProducer().createText();
+        if (logger.isInfoEnabled()) {
+            logger.info("验证码：{}", text);
+        }
         masterUserService.setCaptcha(request.getSession(true), calcMathCaptcha.parseResult(text));
         BufferedImage image = calcMathCaptcha.getProducer().createImage(calcMathCaptcha.parseText(text));
         ImageIO.write(image, "jpg", response.getOutputStream());

src/main/java/com/ifacebox/web/common/captcha/CalcMathTextCreator.java

@@ -32,7 +32,7 @@ public class CalcMathTextCreator extends DefaultTextCreator {
         } else if (calc == CALC_SUBTRACTION) {
             //减法，交换位置不出现负数
             result = x >= y ? x - y : y - x;
-            text.append(x >= y ? CALC_MATH_NUMBER[x] : CALC_MATH_NUMBER[y]).append(CALC_SYMBOL[CALC_SUBTRACTION]).append(x >= y ? CALC_MATH_NUMBER[x] : CALC_MATH_NUMBER[y]);
+            text.append(x >= y ? CALC_MATH_NUMBER[x] : CALC_MATH_NUMBER[y]).append(CALC_SYMBOL[CALC_SUBTRACTION]).append(x >= y ? CALC_MATH_NUMBER[y] : CALC_MATH_NUMBER[x]);
         } else if (calc == CALC_MULTIPLICATION) {
             //乘法
             result = x * y;