diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/uuid/UUID.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/uuid/UUID.java
index e3b032f4..97497f28 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/uuid/UUID.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/uuid/UUID.java
@@ -66,7 +66,7 @@ public final class UUID implements java.io.Serializable, Comparable<UUID>
     }
 
     /**
-     * 获取类型 4（伪随机生成的）UUID 的静态工厂。 
+     * 获取类型 4（伪随机生成的）UUID 的静态工厂。
      * 
      * @return 随机生成的 {@code UUID}
      */
@@ -343,25 +343,25 @@ public final class UUID implements java.io.Serializable, Comparable<UUID>
         final StringBuilder builder = new StringBuilder(isSimple ? 32 : 36);
         // time_low
         builder.append(digits(mostSigBits >> 32, 8));
-        if (false == isSimple)
+        if (!isSimple)
         {
             builder.append('-');
         }
         // time_mid
         builder.append(digits(mostSigBits >> 16, 4));
-        if (false == isSimple)
+        if (!isSimple)
         {
             builder.append('-');
         }
         // time_high_and_version
         builder.append(digits(mostSigBits, 4));
-        if (false == isSimple)
+        if (!isSimple)
         {
             builder.append('-');
         }
         // variant_and_sequence
         builder.append(digits(leastSigBits >> 48, 4));
-        if (false == isSimple)
+        if (!isSimple)
         {
             builder.append('-');
         }
diff --git a/ruoyi-framework/src/main/java/com/ruoyi/framework/config/KaptchaTextCreator.java b/ruoyi-framework/src/main/java/com/ruoyi/framework/config/KaptchaTextCreator.java
index bd0dabb0..84881643 100644
--- a/ruoyi-framework/src/main/java/com/ruoyi/framework/config/KaptchaTextCreator.java
+++ b/ruoyi-framework/src/main/java/com/ruoyi/framework/config/KaptchaTextCreator.java
@@ -21,7 +21,7 @@ public class KaptchaTextCreator extends DefaultTextCreator
         int x = random.nextInt(10);
         int y = random.nextInt(10);
         StringBuilder suChinese = new StringBuilder();
-        int randomoperands = (int) Math.round(Math.random() * 2);
+        int randomoperands = random.nextInt(3);
         if (randomoperands == 0)
         {
             result = x * y;
diff --git a/ruoyi-quartz/src/main/java/com/ruoyi/quartz/util/AbstractQuartzJob.java b/ruoyi-quartz/src/main/java/com/ruoyi/quartz/util/AbstractQuartzJob.java
index 9f5c1ea2..9e38f0df 100644
--- a/ruoyi-quartz/src/main/java/com/ruoyi/quartz/util/AbstractQuartzJob.java
+++ b/ruoyi-quartz/src/main/java/com/ruoyi/quartz/util/AbstractQuartzJob.java
@@ -3,7 +3,6 @@ package com.ruoyi.quartz.util;
 import java.util.Date;
 import org.quartz.Job;
 import org.quartz.JobExecutionContext;
-import org.quartz.JobExecutionException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import com.ruoyi.common.constant.Constants;
@@ -31,7 +30,7 @@ public abstract class AbstractQuartzJob implements Job
     private static ThreadLocal<Date> threadLocal = new ThreadLocal<>();
 
     @Override
-    public void execute(JobExecutionContext context) throws JobExecutionException
+    public void execute(JobExecutionContext context)
     {
         SysJob sysJob = new SysJob();
         BeanUtils.copyBeanProp(sysJob, context.getMergedJobDataMap().get(ScheduleConstants.TASK_PROPERTIES));