456789

backend/src/main/java/com/jiayue/ssi/controller/UserLoginController.java

@@ -50,7 +50,7 @@ public class UserLoginController {
     public ResponseVO getVerifyCode(String murmur,HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws CustomException {
         // 三个参数分别为宽、高、位数
         try {
-            if (murmur.length()!=32){
+            if (murmur==null || murmur.length()!=32){
                 return ResponseVO.fail("不能生成验证码！");
             }
             String textcode = "";