From e729a924d4b2003f080edbec2455b4e7a1eb5d1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=96=AF=E7=8B=82=E7=9A=84=E7=8B=AE=E5=AD=90li?=
 <15040126243@163.com>
Date: Wed, 21 Dec 2022 10:41:32 +0800
Subject: [PATCH] =?UTF-8?q?update=20=E4=BC=98=E5=8C=96=20=E9=AA=8C?=
 =?UTF-8?q?=E8=AF=81=E7=A0=81=E7=BB=93=E6=9E=9C=E4=BD=BF=E7=94=A8spel?=
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---
 .../controller/common/CaptchaController.java  | 28 ++++++-------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CaptchaController.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CaptchaController.java
index 94630e2e9..795359c5b 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CaptchaController.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CaptchaController.java
@@ -3,7 +3,6 @@ package com.ruoyi.web.controller.common;
 import cn.dev33.satoken.annotation.SaIgnore;
 import cn.hutool.captcha.AbstractCaptcha;
 import cn.hutool.captcha.generator.CodeGenerator;
-import cn.hutool.core.convert.Convert;
 import cn.hutool.core.util.IdUtil;
 import cn.hutool.core.util.RandomUtil;
 import com.ruoyi.common.constant.CacheConstants;
@@ -21,6 +20,9 @@ import com.ruoyi.sms.entity.SmsResult;
 import com.ruoyi.system.service.ISysConfigService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.expression.Expression;
+import org.springframework.expression.ExpressionParser;
+import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -95,28 +97,16 @@ public class CaptchaController {
         AbstractCaptcha captcha = SpringUtils.getBean(captchaProperties.getCategory().getClazz());
         captcha.setGenerator(codeGenerator);
         captcha.createCode();
-        String code = isMath ? getCodeResult(captcha.getCode()) : captcha.getCode();
+        String code = captcha.getCode();
+        if (isMath) {
+            ExpressionParser parser = new SpelExpressionParser();
+            Expression exp = parser.parseExpression(StringUtils.remove(code, "="));
+            code = exp.getValue(String.class);
+        }
         RedisUtils.setCacheObject(verifyKey, code, Duration.ofMinutes(Constants.CAPTCHA_EXPIRATION));
         ajax.put("uuid", uuid);
         ajax.put("img", captcha.getImageBase64());
         return R.ok(ajax);
     }
 
-    private String getCodeResult(String capStr) {
-        int numberLength = captchaProperties.getNumberLength();
-        int a = Convert.toInt(StringUtils.substring(capStr, 0, numberLength).trim());
-        char operator = capStr.charAt(numberLength);
-        int b = Convert.toInt(StringUtils.substring(capStr, numberLength + 1, numberLength + 1 + numberLength).trim());
-        switch (operator) {
-            case '*':
-                return Convert.toStr(a * b);
-            case '+':
-                return Convert.toStr(a + b);
-            case '-':
-                return Convert.toStr(a - b);
-            default:
-                return StringUtils.EMPTY;
-        }
-    }
-
 }