diff --git a/austin-cron/src/main/java/com/java3y/austin/cron/xxl/utils/XxlJobUtils.java b/austin-cron/src/main/java/com/java3y/austin/cron/xxl/utils/XxlJobUtils.java
index f10bf8d..77d984b 100644
--- a/austin-cron/src/main/java/com/java3y/austin/cron/xxl/utils/XxlJobUtils.java
+++ b/austin-cron/src/main/java/com/java3y/austin/cron/xxl/utils/XxlJobUtils.java
@@ -84,7 +84,7 @@ public class XxlJobUtils {
         if (Objects.isNull(basicResultVO.getData())) {
             XxlJobGroup xxlJobGroup = XxlJobGroup.builder().appname(appName).title(jobHandlerName).addressType(CommonConstant.FALSE).build();
             if (RespStatusEnum.SUCCESS.getCode().equals(cronTaskService.createGroup(xxlJobGroup).getStatus())) {
-                return (int) cronTaskService.getGroupId(appName, jobHandlerName).getData();
+                return (Integer) cronTaskService.getGroupId(appName, jobHandlerName).getData();
             }
         }
         return basicResultVO.getData();
diff --git a/austin-handler/src/main/java/com/java3y/austin/handler/domain/sms/LinTongSendResult.java b/austin-handler/src/main/java/com/java3y/austin/handler/domain/sms/LinTongSendResult.java
index 8229f57..27d682d 100644
--- a/austin-handler/src/main/java/com/java3y/austin/handler/domain/sms/LinTongSendResult.java
+++ b/austin-handler/src/main/java/com/java3y/austin/handler/domain/sms/LinTongSendResult.java
@@ -32,7 +32,7 @@ public class LinTongSendResult {
     @Data
     @AllArgsConstructor
     @NoArgsConstructor
-    public class DataDTO {
+    public static class DataDTO {
         Integer code;
         String message;
         Long msgId;
diff --git a/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/send/SendAfterCheckAction.java b/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/send/SendAfterCheckAction.java
index b6da121..9213a7c 100644
--- a/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/send/SendAfterCheckAction.java
+++ b/austin-service-api-impl/src/main/java/com/java3y/austin/service/api/impl/action/send/SendAfterCheckAction.java
@@ -31,11 +31,14 @@ public class SendAfterCheckAction implements BusinessProcess<SendTaskModel> {
     /**
      * 邮件和手机号正则
      */
-    protected static final Map<Integer, String> CHANNEL_REGEX_EXP = new HashMap<>();
+    protected static final Map<Integer, String> CHANNEL_REGEX_EXP;
 
     static {
-        CHANNEL_REGEX_EXP.put(IdType.PHONE.getCode(), PHONE_REGEX_EXP);
-        CHANNEL_REGEX_EXP.put(IdType.EMAIL.getCode(), EMAIL_REGEX_EXP);
+        Map<Integer, String> tempMap = new HashMap<>();
+        tempMap.put(IdType.PHONE.getCode(), PHONE_REGEX_EXP);
+        tempMap.put(IdType.EMAIL.getCode(), EMAIL_REGEX_EXP);
+        // 初始化为不可变集合，避免被恶意修改
+        CHANNEL_REGEX_EXP = Collections.unmodifiableMap(tempMap);
     }
 
 
diff --git a/austin-stream/src/main/java/com/java3y/austin/stream/utils/LettuceRedisUtils.java b/austin-stream/src/main/java/com/java3y/austin/stream/utils/LettuceRedisUtils.java
index 0639839..f156909 100644
--- a/austin-stream/src/main/java/com/java3y/austin/stream/utils/LettuceRedisUtils.java
+++ b/austin-stream/src/main/java/com/java3y/austin/stream/utils/LettuceRedisUtils.java
@@ -27,7 +27,7 @@ public class LettuceRedisUtils {
 
     static {
         RedisURI redisUri = RedisURI.Builder.redis(AustinFlinkConstant.REDIS_IP)
-                .withPort(Integer.valueOf(AustinFlinkConstant.REDIS_PORT))
+                .withPort(Integer.parseInt(AustinFlinkConstant.REDIS_PORT))
                 .withPassword(AustinFlinkConstant.REDIS_PASSWORD.toCharArray())
                 .build();
         redisClient = RedisClient.create(redisUri);
diff --git a/austin-web/src/main/java/com/java3y/austin/web/utils/SpringFileUtils.java b/austin-web/src/main/java/com/java3y/austin/web/utils/SpringFileUtils.java
index 8af9482..021845a 100644
--- a/austin-web/src/main/java/com/java3y/austin/web/utils/SpringFileUtils.java
+++ b/austin-web/src/main/java/com/java3y/austin/web/utils/SpringFileUtils.java
@@ -1,18 +1,19 @@
 package com.java3y.austin.web.utils;
 
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
-import java.util.Objects;
 
 
 /**
  * @author 3y
  * multipartFile 转成 File 对象
  */
+@Slf4j
 public class SpringFileUtils {
     private SpringFileUtils() {
     }
@@ -26,23 +27,14 @@ public class SpringFileUtils {
     public static File getFile(MultipartFile multipartFile) {
         String fileName = multipartFile.getOriginalFilename();
         File file = new File(fileName);
-        OutputStream out = null;
-        try {
-            out = new FileOutputStream(file);
+        try (OutputStream out = new FileOutputStream(file)){
             byte[] ss = multipartFile.getBytes();
             for (int i = 0; i < ss.length; i++) {
                 out.write(ss[i]);
             }
         } catch (IOException e) {
-            e.printStackTrace();
-        } finally {
-            if (Objects.nonNull(out)) {
-                try {
-                    out.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }
+            log.error("SpringFileUtils#getFile multipartFile is converted to File error:{}", e);
+            return null;
         }
         return file;
     }