diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/main/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/main/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSender.java
index c0070ac11c..c8ded8cfad 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/main/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/main/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSender.java
@@ -48,6 +48,8 @@ import java.util.Objects;
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
 
+import lombok.Getter;
+import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
 /**
@@ -189,7 +191,7 @@ public final class DingTalkSender {
             String resp;
             try {
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, "UTF-8");
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
             } finally {
                 response.close();
@@ -317,15 +319,17 @@ public final class DingTalkSender {
         String sign = org.apache.commons.lang3.StringUtils.EMPTY;
         try {
             Mac mac = Mac.getInstance("HmacSHA256");
-            mac.init(new SecretKeySpec(secret.getBytes("UTF-8"), "HmacSHA256"));
-            byte[] signData = mac.doFinal(stringToSign.getBytes("UTF-8"));
-            sign = URLEncoder.encode(new String(Base64.encodeBase64(signData)), "UTF-8");
+            mac.init(new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA256"));
+            byte[] signData = mac.doFinal(stringToSign.getBytes(StandardCharsets.UTF_8));
+            sign = URLEncoder.encode(new String(Base64.encodeBase64(signData)), StandardCharsets.UTF_8.name());
         } catch (Exception e) {
             log.error("generate sign error, message:{}", e);
         }
         return url + "&timestamp=" + timestamp + "&sign=" + sign;
     }
 
+    @Getter
+    @Setter
     static final class DingTalkSendMsgResponse {
 
         private Integer errcode;
@@ -334,22 +338,6 @@ public final class DingTalkSender {
         public DingTalkSendMsgResponse() {
         }
 
-        public Integer getErrcode() {
-            return this.errcode;
-        }
-
-        public void setErrcode(Integer errcode) {
-            this.errcode = errcode;
-        }
-
-        public String getErrmsg() {
-            return this.errmsg;
-        }
-
-        public void setErrmsg(String errmsg) {
-            this.errmsg = errmsg;
-        }
-
         @Override
         public boolean equals(final Object o) {
             if (o == this) {
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/test/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSenderTest.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/test/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSenderTest.java
index 7a8df0549c..cd30105c7a 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/test/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSenderTest.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-dingtalk/src/test/java/org/apache/dolphinscheduler/plugin/alert/dingtalk/DingTalkSenderTest.java
@@ -19,6 +19,7 @@ package org.apache.dolphinscheduler.plugin.alert.dingtalk;
 
 import org.apache.dolphinscheduler.alert.api.AlertResult;
 
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -47,7 +48,7 @@ public class DingTalkSenderTest {
     @Test
     public void testSend() {
         DingTalkSender dingTalkSender = new DingTalkSender(dingTalkConfig);
-        dingTalkSender.sendDingTalkMsg("keyWord+Welcome", "UTF-8");
+        dingTalkSender.sendDingTalkMsg("keyWord+Welcome", StandardCharsets.UTF_8.name());
         dingTalkConfig.put(DingTalkParamsConstants.NAME_DING_TALK_PROXY_ENABLE, "true");
         dingTalkSender = new DingTalkSender(dingTalkConfig);
         AlertResult alertResult = dingTalkSender.sendDingTalkMsg("title", "content test");
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/EmailConstants.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/EmailConstants.java
index 94eb4efa39..3eec7022fd 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/EmailConstants.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/EmailConstants.java
@@ -56,8 +56,6 @@ public final class EmailConstants {
 
     public static final String TABLE_BODY_HTML_TAIL = "</table></body></html>";
 
-    public static final String UTF_8 = "UTF-8";
-
     public static final String EXCEL_SUFFIX_XLSX = ".xlsx";
 
     public static final String SINGLE_SLASH = "/";
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/MailSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/MailSender.java
index 2e400efbce..8826a44fba 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/MailSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/MailSender.java
@@ -34,6 +34,7 @@ import org.apache.commons.mail.HtmlEmail;
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -171,7 +172,7 @@ public final class MailSender {
                 Session session = getSession();
                 email.setMailSession(session);
                 email.setFrom(mailSenderEmail);
-                email.setCharset(EmailConstants.UTF_8);
+                email.setCharset(StandardCharsets.UTF_8.name());
                 if (CollectionUtils.isNotEmpty(receivers)) {
                     // receivers mail
                     for (String receiver : receivers) {
@@ -344,7 +345,8 @@ public final class MailSender {
         ExcelUtils.genExcelFile(content, randomFilename, xlsFilePath);
 
         part2.attachFile(file);
-        part2.setFileName(MimeUtility.encodeText(title + EmailConstants.EXCEL_SUFFIX_XLSX, EmailConstants.UTF_8, "B"));
+        part2.setFileName(
+                MimeUtility.encodeText(title + EmailConstants.EXCEL_SUFFIX_XLSX, StandardCharsets.UTF_8.name(), "B"));
         // add components to collection
         partList.addBodyPart(part1);
         partList.addBodyPart(part2);
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/ExcelUtilsTest.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/ExcelUtilsTest.java
index f428a16d92..f28df77de9 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/ExcelUtilsTest.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/ExcelUtilsTest.java
@@ -66,8 +66,15 @@ public class ExcelUtilsTest {
 
     @Test
     public void testGenExcelFileByCheckDir() {
-        ExcelUtils.genExcelFile("[{\"a\": \"a\"},{\"a\": \"a\"}]", "t", "/tmp/xls");
-        File file = new File("/tmp/xls" + EmailConstants.SINGLE_SLASH + "t" + EmailConstants.EXCEL_SUFFIX_XLSX);
+        String path = "/tmp/xls";
+        ExcelUtils.genExcelFile("[{\"a\": \"a\"},{\"a\": \"a\"}]", "t", path);
+        File file =
+                new File(
+                        path
+                                + EmailConstants.SINGLE_SLASH
+                                + "t"
+                                + EmailConstants.EXCEL_SUFFIX_XLSX);
         file.delete();
+        Assertions.assertFalse(file.exists());
     }
 }
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/MailUtilsTest.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/MailUtilsTest.java
index f562999be0..acc255ae0e 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/MailUtilsTest.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/test/java/org/apache/dolphinscheduler/plugin/alert/email/MailUtilsTest.java
@@ -18,10 +18,9 @@
 package org.apache.dolphinscheduler.plugin.alert.email;
 
 import org.apache.dolphinscheduler.alert.api.AlertConstants;
+import org.apache.dolphinscheduler.alert.api.AlertResult;
 import org.apache.dolphinscheduler.alert.api.ShowType;
 import org.apache.dolphinscheduler.common.utils.JSONUtils;
-import org.apache.dolphinscheduler.plugin.alert.email.template.AlertTemplate;
-import org.apache.dolphinscheduler.plugin.alert.email.template.DefaultHTMLTemplate;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -42,7 +41,6 @@ public class MailUtilsTest {
     private static final Logger logger = LoggerFactory.getLogger(MailUtilsTest.class);
     static MailSender mailSender;
     private static Map<String, String> emailConfig = new HashMap<>();
-    private static AlertTemplate alertTemplate;
 
     @BeforeAll
     public static void initEmailConfig() {
@@ -59,7 +57,6 @@ public class MailUtilsTest {
         emailConfig.put(MailParamsConstants.NAME_PLUGIN_DEFAULT_EMAIL_RECEIVERS, "347801120@qq.com");
         emailConfig.put(MailParamsConstants.NAME_PLUGIN_DEFAULT_EMAIL_RECEIVERCCS, "347801120@qq.com");
         emailConfig.put(AlertConstants.NAME_SHOW_TYPE, ShowType.TEXT.getDescp());
-        alertTemplate = new DefaultHTMLTemplate();
         mailSender = new MailSender(emailConfig);
     }
 
@@ -77,9 +74,10 @@ public class MailUtilsTest {
                 + "\"Host: 192.168.xx.xx\","
                 + "\"Notify group :4\"]";
 
-        mailSender.sendMails(
+        AlertResult alertResult = mailSender.sendMails(
                 "Mysql Exception",
                 content);
+        Assertions.assertEquals("false", alertResult.getStatus());
     }
 
     @Test
@@ -108,7 +106,8 @@ public class MailUtilsTest {
         emailConfig.put(MailParamsConstants.NAME_MAIL_USER, "user");
         emailConfig.put(MailParamsConstants.NAME_MAIL_PASSWD, "passwd");
         mailSender = new MailSender(emailConfig);
-        mailSender.sendMails(title, content);
+        AlertResult alertResult = mailSender.sendMails(title, content);
+        Assertions.assertEquals("false", alertResult.getStatus());
     }
 
     public String list2String() {
@@ -134,7 +133,6 @@ public class MailUtilsTest {
         logger.info(mapjson);
 
         return mapjson;
-
     }
 
     @Test
@@ -143,7 +141,8 @@ public class MailUtilsTest {
         String content = list2String();
         emailConfig.put(AlertConstants.NAME_SHOW_TYPE, ShowType.TABLE.getDescp());
         mailSender = new MailSender(emailConfig);
-        mailSender.sendMails(title, content);
+        AlertResult alertResult = mailSender.sendMails(title, content);
+        Assertions.assertEquals("false", alertResult.getStatus());
     }
 
     @Test
@@ -151,7 +150,8 @@ public class MailUtilsTest {
         String content = list2String();
         emailConfig.put(AlertConstants.NAME_SHOW_TYPE, ShowType.ATTACHMENT.getDescp());
         mailSender = new MailSender(emailConfig);
-        mailSender.sendMails("gaojing", content);
+        AlertResult alertResult = mailSender.sendMails("gaojing", content);
+        Assertions.assertEquals("false", alertResult.getStatus());
     }
 
     @Test
@@ -159,7 +159,7 @@ public class MailUtilsTest {
         String content = list2String();
         emailConfig.put(AlertConstants.NAME_SHOW_TYPE, ShowType.TABLE_ATTACHMENT.getDescp());
         mailSender = new MailSender(emailConfig);
-        mailSender.sendMails("gaojing", content);
+        AlertResult alertResult = mailSender.sendMails("gaojing", content);
+        Assertions.assertEquals("false", alertResult.getStatus());
     }
-
 }
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-feishu/src/main/java/org/apache/dolphinscheduler/plugin/alert/feishu/FeiShuSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-feishu/src/main/java/org/apache/dolphinscheduler/plugin/alert/feishu/FeiShuSender.java
index 14a1d63ff0..369060843c 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-feishu/src/main/java/org/apache/dolphinscheduler/plugin/alert/feishu/FeiShuSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-feishu/src/main/java/org/apache/dolphinscheduler/plugin/alert/feishu/FeiShuSender.java
@@ -31,6 +31,7 @@ import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.util.EntityUtils;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -161,7 +162,7 @@ public final class FeiShuSender {
             String resp;
             try {
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, "utf-8");
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
             } finally {
                 response.close();
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
index 999a0c9599..a1de852407 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-http/src/main/java/org/apache/dolphinscheduler/plugin/alert/http/HttpSender.java
@@ -39,6 +39,7 @@ import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -58,7 +59,6 @@ public final class HttpSender {
      * request type get
      */
     private static final String REQUEST_TYPE_GET = "GET";
-    private static final String DEFAULT_CHARSET = "utf-8";
     private final String headerParams;
     private final String bodyParams;
     private final String contentField;
@@ -124,7 +124,7 @@ public final class HttpSender {
 
         CloseableHttpResponse response = httpClient.execute(httpRequest);
         HttpEntity entity = response.getEntity();
-        return EntityUtils.toString(entity, DEFAULT_CHARSET);
+        return EntityUtils.toString(entity, StandardCharsets.UTF_8);
     }
 
     private void createHttpRequest(String msg) throws MalformedURLException, URISyntaxException {
@@ -157,7 +157,8 @@ public final class HttpSender {
                 type = URL_SPLICE_CHAR;
             }
             try {
-                url = String.format("%s%s%s=%s", url, type, contentField, URLEncoder.encode(msg, DEFAULT_CHARSET));
+                url = String.format("%s%s%s=%s", url, type, contentField,
+                        URLEncoder.encode(msg, StandardCharsets.UTF_8.name()));
             } catch (UnsupportedEncodingException e) {
                 throw new RuntimeException(e);
             }
@@ -190,7 +191,7 @@ public final class HttpSender {
             }
             // set msg content field
             objectNode.put(contentField, msg);
-            StringEntity entity = new StringEntity(JSONUtils.toJsonString(objectNode), DEFAULT_CHARSET);
+            StringEntity entity = new StringEntity(JSONUtils.toJsonString(objectNode), StandardCharsets.UTF_8);
             ((HttpPost) httpRequest).setEntity(entity);
         } catch (Exception e) {
             log.error("send http alert msg  exception : {}", e.getMessage());
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-prometheus/src/main/java/org/apache/dolphinscheduler/plugin/alert/prometheus/PrometheusAlertSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-prometheus/src/main/java/org/apache/dolphinscheduler/plugin/alert/prometheus/PrometheusAlertSender.java
index d27745049e..1106e6799f 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-prometheus/src/main/java/org/apache/dolphinscheduler/plugin/alert/prometheus/PrometheusAlertSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-prometheus/src/main/java/org/apache/dolphinscheduler/plugin/alert/prometheus/PrometheusAlertSender.java
@@ -34,6 +34,7 @@ import org.apache.http.impl.client.HttpClients;
 import org.apache.http.util.EntityUtils;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
@@ -90,7 +91,7 @@ public class PrometheusAlertSender {
                 }
 
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, "utf-8");
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
                 log.error(
                         "Prometheus alert manager send alert failed, http status code: {}, title: {} ,content: {}, resp: {}",
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-script/src/test/java/org/apache/dolphinscheduler/plugin/alert/script/ProcessUtilsTest.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-script/src/test/java/org/apache/dolphinscheduler/plugin/alert/script/ProcessUtilsTest.java
index a34f062264..3d85d5d638 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-script/src/test/java/org/apache/dolphinscheduler/plugin/alert/script/ProcessUtilsTest.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-script/src/test/java/org/apache/dolphinscheduler/plugin/alert/script/ProcessUtilsTest.java
@@ -33,6 +33,7 @@ public class ProcessUtilsTest {
 
     @Test
     public void testExecuteScript() {
-        ProcessUtils.executeScript(cmd);
+        int code = ProcessUtils.executeScript(cmd);
+        assert code != -1;
     }
 }
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-slack/src/main/java/org/apache/dolphinscheduler/plugin/alert/slack/SlackSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-slack/src/main/java/org/apache/dolphinscheduler/plugin/alert/slack/SlackSender.java
index 60b2f8281a..4096ccc998 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-slack/src/main/java/org/apache/dolphinscheduler/plugin/alert/slack/SlackSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-slack/src/main/java/org/apache/dolphinscheduler/plugin/alert/slack/SlackSender.java
@@ -29,6 +29,7 @@ import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClients;
 import org.apache.http.util.EntityUtils;
 
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
@@ -81,11 +82,11 @@ public final class SlackSender {
             }
 
             HttpPost httpPost = new HttpPost(webHookUrl);
-            httpPost.setEntity(new StringEntity(JSONUtils.toJsonString(paramMap), "UTF-8"));
+            httpPost.setEntity(new StringEntity(JSONUtils.toJsonString(paramMap), StandardCharsets.UTF_8));
             CloseableHttpResponse response = httpClient.execute(httpPost);
 
             HttpEntity entity = response.getEntity();
-            return EntityUtils.toString(entity, "UTF-8");
+            return EntityUtils.toString(entity, StandardCharsets.UTF_8);
         } catch (Exception e) {
             log.error("Send message to slack error.", e);
             return "System Exception";
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-telegram/src/main/java/org/apache/dolphinscheduler/plugin/alert/telegram/TelegramSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-telegram/src/main/java/org/apache/dolphinscheduler/plugin/alert/telegram/TelegramSender.java
index 8aba9f5c2b..129bc62c1c 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-telegram/src/main/java/org/apache/dolphinscheduler/plugin/alert/telegram/TelegramSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-telegram/src/main/java/org/apache/dolphinscheduler/plugin/alert/telegram/TelegramSender.java
@@ -153,7 +153,7 @@ public final class TelegramSender {
             String resp;
             try {
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, "UTF-8");
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
             } finally {
                 response.close();
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatAlertConstants.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatAlertConstants.java
index 7f5eaef4f9..76ad480015 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatAlertConstants.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatAlertConstants.java
@@ -23,8 +23,6 @@ public final class WeChatAlertConstants {
 
     static final String MARKDOWN_ENTER = "\n";
 
-    static final String CHARSET = "UTF-8";
-
     static final String WE_CHAT_PUSH_URL = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={token}";
 
     static final String WE_CHAT_APP_CHAT_PUSH_URL = "https://qyapi.weixin.qq.com/cgi-bin/appchat/send?access_token" +
diff --git a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatSender.java b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatSender.java
index 4b49e0436d..c5ffec1f46 100644
--- a/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatSender.java
+++ b/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-wechat/src/main/java/org/apache/dolphinscheduler/plugin/alert/wechat/WeChatSender.java
@@ -38,6 +38,7 @@ import org.apache.http.impl.client.HttpClients;
 import org.apache.http.util.EntityUtils;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -45,6 +46,8 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
 
+import lombok.Getter;
+import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -85,12 +88,12 @@ public final class WeChatSender {
                 CloseableHttpClient httpClient =
                         HttpClients.custom().setRetryHandler(HttpServiceRetryStrategy.retryStrategy).build()) {
             HttpPost httpPost = new HttpPost(url);
-            httpPost.setEntity(new StringEntity(data, WeChatAlertConstants.CHARSET));
+            httpPost.setEntity(new StringEntity(data, StandardCharsets.UTF_8));
             CloseableHttpResponse response = httpClient.execute(httpPost);
             String resp;
             try {
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, WeChatAlertConstants.CHARSET);
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
             } finally {
                 response.close();
@@ -142,7 +145,7 @@ public final class WeChatSender {
             HttpGet httpGet = new HttpGet(url);
             try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
                 HttpEntity entity = response.getEntity();
-                resp = EntityUtils.toString(entity, WeChatAlertConstants.CHARSET);
+                resp = EntityUtils.toString(entity, StandardCharsets.UTF_8);
                 EntityUtils.consume(entity);
             }
 
@@ -259,6 +262,8 @@ public final class WeChatSender {
         return null;
     }
 
+    @Getter
+    @Setter
     static final class WeChatSendMsgResponse {
 
         private Integer errcode;
@@ -267,22 +272,6 @@ public final class WeChatSender {
         public WeChatSendMsgResponse() {
         }
 
-        public Integer getErrcode() {
-            return this.errcode;
-        }
-
-        public void setErrcode(Integer errcode) {
-            this.errcode = errcode;
-        }
-
-        public String getErrmsg() {
-            return this.errmsg;
-        }
-
-        public void setErrmsg(String errmsg) {
-            this.errmsg = errmsg;
-        }
-
         public boolean equals(final Object o) {
             if (o == this) {
                 return true;
diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/constants/Constants.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/constants/Constants.java
index b5bbf740e9..ebf668a312 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/constants/Constants.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/constants/Constants.java
@@ -242,11 +242,6 @@ public final class Constants {
      */
     public static final String HTTP_X_REAL_IP = "X-Real-IP";
 
-    /**
-     * UTF-8
-     */
-    public static final String UTF_8 = "UTF-8";
-
     /**
      * user name regex
      */
diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/FileUtils.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/FileUtils.java
index fee1d9a95c..60629576d9 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/FileUtils.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/FileUtils.java
@@ -22,7 +22,6 @@ import static org.apache.dolphinscheduler.common.constants.Constants.FOLDER_SEPA
 import static org.apache.dolphinscheduler.common.constants.Constants.FORMAT_S_S;
 import static org.apache.dolphinscheduler.common.constants.Constants.RESOURCE_VIEW_SUFFIXES;
 import static org.apache.dolphinscheduler.common.constants.Constants.RESOURCE_VIEW_SUFFIXES_DEFAULT_VALUE;
-import static org.apache.dolphinscheduler.common.constants.Constants.UTF_8;
 import static org.apache.dolphinscheduler.common.constants.DateConstants.YYYYMMDDHHMMSS;
 
 import org.apache.commons.io.IOUtils;
@@ -207,7 +206,7 @@ public class FileUtils {
             while ((length = inputStream.read(buffer)) != -1) {
                 output.write(buffer, 0, length);
             }
-            return output.toString(UTF_8);
+            return output.toString(StandardCharsets.UTF_8.name());
         } catch (Exception e) {
             log.error(e.getMessage(), e);
             throw new RuntimeException(e);
diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/HttpUtils.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/HttpUtils.java
index 5c79fff951..e5d2256150 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/HttpUtils.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/HttpUtils.java
@@ -36,6 +36,7 @@ import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
 import org.apache.http.util.EntityUtils;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
@@ -143,7 +144,7 @@ public class HttpUtils {
             }
 
             HttpEntity entity = response.getEntity();
-            return entity != null ? EntityUtils.toString(entity, Constants.UTF_8) : null;
+            return entity != null ? EntityUtils.toString(entity, StandardCharsets.UTF_8) : null;
         } catch (IOException e) {
             log.error("Error executing HTTP GET request", e);
             return null;