diff --git a/notify-core/src/main/java/com/cicdi/notify/util/StringUtils.java b/notify-core/src/main/java/com/cicdi/notify/util/StringUtils.java
new file mode 100644
index 0000000..bfe6236
--- /dev/null
+++ b/notify-core/src/main/java/com/cicdi/notify/util/StringUtils.java
@@ -0,0 +1,33 @@
+package com.cicdi.notify.util;
+
+/**
+ * @author Yaser Hsueh
+ */
+public abstract class StringUtils {
+
+    public static boolean isEmpty(Object str) {
+        return (str == null || "".equals(str));
+    }
+
+    public static boolean hasLength(CharSequence str) {
+        return (str != null && str.length() > 0);
+    }
+
+    public static boolean hasLength(String str) {
+        return (str != null && !str.isEmpty());
+    }
+
+    public static boolean isBlank(String str) {
+        int strLen;
+        if (str == null || (strLen = str.length()) == 0) {
+            return true;
+        }
+        for (int i = 0; i < strLen; i++) {
+            if ((!Character.isWhitespace(str.charAt(i)))) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+}
diff --git a/notify-email/pom.xml b/notify-email/pom.xml
index 7db5059..43555df 100644
--- a/notify-email/pom.xml
+++ b/notify-email/pom.xml
@@ -29,12 +29,6 @@
             <scope>provided</scope>
         </dependency>
 
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-web</artifactId>
-            <scope>provided</scope>
-        </dependency>
-
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
diff --git a/notify-email/src/main/java/com/cicdi/notify/email/embedded/DefaultEmailNotifier.java b/notify-email/src/main/java/com/cicdi/notify/email/embedded/DefaultEmailNotifier.java
index 6ef1e08..715550d 100644
--- a/notify-email/src/main/java/com/cicdi/notify/email/embedded/DefaultEmailNotifier.java
+++ b/notify-email/src/main/java/com/cicdi/notify/email/embedded/DefaultEmailNotifier.java
@@ -6,6 +6,7 @@ import com.cicdi.notify.email.EmailProvider;
 import com.cicdi.notify.email.EmailTemplate;
 import com.cicdi.notify.email.EmailTemplateParsed;
 import com.cicdi.notify.util.ExpressionUtils;
+import com.cicdi.notify.util.StringUtils;
 import org.apache.http.HttpHeaders;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
@@ -19,7 +20,6 @@ import org.springframework.core.io.InputStreamSource;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.mail.javamail.JavaMailSenderImpl;
 import org.springframework.mail.javamail.MimeMessageHelper;
-import org.springframework.util.StringUtils;
 
 import javax.mail.MessagingException;
 import javax.mail.internet.MimeMessage;
diff --git a/notify-email/src/test/java/com/cicdi/notify/email/DefaultEmailTest.java b/notify-email/src/test/java/com/cicdi/notify/email/DefaultEmailTest.java
index e0a1635..68a3ef0 100644
--- a/notify-email/src/test/java/com/cicdi/notify/email/DefaultEmailTest.java
+++ b/notify-email/src/test/java/com/cicdi/notify/email/DefaultEmailTest.java
@@ -23,31 +23,28 @@ public class DefaultEmailTest {
     @Test
     public void testSend() {
         // 通知器配置管理器
-        NotifyConfigManager notifyConfigManager = new NotifyConfigManager() {
-            @Override
-            public NotifierProperties getNotifyConfig(NotifyType notifyType, String configId) {
-                NotifierProperties notifierProperties = new NotifierProperties();
-                notifierProperties.setType(DefaultNotifyType.email.getId());
-                notifierProperties.setProvider(EmailProvider.embedded.getId());
-                notifierProperties.setId("12");
+        NotifyConfigManager notifyConfigManager = (notifyType, configId) -> {
+            NotifierProperties notifierProperties = new NotifierProperties();
+            notifierProperties.setType(DefaultNotifyType.email.getId());
+            notifierProperties.setProvider(EmailProvider.embedded.getId());
+            notifierProperties.setId("12");
 
-                Map<String, Object> config = new HashMap<>();
+            Map<String, Object> config = new HashMap<>();
 
-                config.put("host", "nas.xueye.io");
-                config.put("port", 587);
-                config.put("username", "xueye");
-                config.put("password", "snow@PX1314");
-                config.put("sender", "master@simaek.com");
-                Map<String, Object> p1 = new HashMap<>();
-                p1.put("name", "mail.smtp.starttls.enable");
-                p1.put("value", "true");
-                Map<String, Object> p2 = new HashMap<>();
-                p2.put("name", "mail.smtp.auth");
-                p2.put("value", "true");
-                config.put("properties", Arrays.asList(p1, p2));
-                notifierProperties.setConfiguration(config);
-                return notifierProperties;
-            }
+            config.put("host", "nas.xueye.io");
+            config.put("port", 587);
+            config.put("username", "xueye");
+            config.put("password", "snow@PX1314");
+            config.put("sender", "master@simaek.com");
+            Map<String, Object> p1 = new HashMap<>();
+            p1.put("name", "mail.smtp.starttls.enable");
+            p1.put("value", "true");
+            Map<String, Object> p2 = new HashMap<>();
+            p2.put("name", "mail.smtp.auth");
+            p2.put("value", "true");
+            config.put("properties", Arrays.asList(p1, p2));
+            notifierProperties.setConfiguration(config);
+            return notifierProperties;
         };
 
         // 模板管理器
diff --git a/notify-wechat/pom.xml b/notify-wechat/pom.xml
index 0655c81..488d1e5 100644
--- a/notify-wechat/pom.xml
+++ b/notify-wechat/pom.xml
@@ -33,11 +33,6 @@
             <artifactId>httpclient</artifactId>
         </dependency>
 
-        <dependency>
-            <groupId>commons-lang</groupId>
-            <artifactId>commons-lang</artifactId>
-        </dependency>
-
     </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/notify-wechat/src/main/java/com/cicdi/notify/wechat/corp/WechatCorpTemplate.java b/notify-wechat/src/main/java/com/cicdi/notify/wechat/corp/WechatCorpTemplate.java
index 359d6cb..671abd6 100644
--- a/notify-wechat/src/main/java/com/cicdi/notify/wechat/corp/WechatCorpTemplate.java
+++ b/notify-wechat/src/main/java/com/cicdi/notify/wechat/corp/WechatCorpTemplate.java
@@ -2,7 +2,7 @@ package com.cicdi.notify.wechat.corp;
 
 import com.alibaba.fastjson.JSONObject;
 import com.cicdi.notify.template.Template;
-import org.apache.commons.lang.StringUtils;
+import com.cicdi.notify.util.StringUtils;
 
 import java.util.Collections;
 import java.util.Map;
@@ -68,10 +68,10 @@ public class WechatCorpTemplate implements Template {
         json.put("msgtype", "text");
         json.put("text", Collections.singletonMap("content", message));
 
-        if (StringUtils.isNotBlank(toUser)) {
+        if (!StringUtils.isBlank(toUser)) {
             json.put("touser", this.createUserIdList(context));
         }
-        if (StringUtils.isNotBlank(toParty)) {
+        if (!StringUtils.isBlank(toParty)) {
             json.put("toparty", this.createDepartmentIdList(context));
         }
 
diff --git a/pom.xml b/pom.xml
index 184b57f..f7213ad 100644
--- a/pom.xml
+++ b/pom.xml
@@ -76,12 +76,6 @@
                 <scope>test</scope>
             </dependency>
 
-            <dependency>
-                <groupId>commons-lang</groupId>
-                <artifactId>commons-lang</artifactId>
-                <version>2.6</version>
-            </dependency>
-
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
@@ -118,6 +112,12 @@
                 <version>1.6.7</version>
             </dependency>
 
+            <dependency>
+                <groupId>com.squareup.okhttp3</groupId>
+                <artifactId>okhttp</artifactId>
+                <version>4.9.3</version>
+            </dependency>
+
         </dependencies>
 
     </dependencyManagement>