diff --git a/hippo4j-spring-boot/hippo4j-spring-boot-starter/src/main/java/cn/hippo4j/springboot/starter/toolkit/CloudCommonIdUtil.java b/hippo4j-spring-boot/hippo4j-spring-boot-starter/src/main/java/cn/hippo4j/springboot/starter/toolkit/CloudCommonIdUtil.java
index 90de193d..53c79ff4 100644
--- a/hippo4j-spring-boot/hippo4j-spring-boot-starter/src/main/java/cn/hippo4j/springboot/starter/toolkit/CloudCommonIdUtil.java
+++ b/hippo4j-spring-boot/hippo4j-spring-boot-starter/src/main/java/cn/hippo4j/springboot/starter/toolkit/CloudCommonIdUtil.java
@@ -26,14 +26,31 @@ import org.springframework.core.env.PropertyResolver;
  */
 public class CloudCommonIdUtil {
 
+    /**
+     * Splice target information separator
+     */
     private static final String SEPARATOR = ":";
 
+    /**
+     * Get client ip port.
+     *
+     * @param resolver  resolver
+     * @param inetUtils inet utils
+     * @return ip and port
+     */
     public static String getClientIpPort(PropertyResolver resolver, InetUtils inetUtils) {
         String hostname = inetUtils.findFirstNonLoopBackHostInfo().getIpAddress();
         String port = resolver.getProperty("server.port", "8080");
         return combineParts(hostname, SEPARATOR, port);
     }
 
+    /**
+     * Get default instance id.
+     *
+     * @param resolver  resolver
+     * @param inetUtils inet utils
+     * @return default instance id
+     */
     @SneakyThrows
     public static String getDefaultInstanceId(PropertyResolver resolver, InetUtils inetUtils) {
         String namePart = getIpApplicationName(resolver, inetUtils);
@@ -41,6 +58,13 @@ public class CloudCommonIdUtil {
         return combineParts(namePart, SEPARATOR, indexPart);
     }
 
+    /**
+     * Get ip application name.
+     *
+     * @param resolver  resolver
+     * @param inetUtils inet utils
+     * @return ip application name
+     */
     @SneakyThrows
     public static String getIpApplicationName(PropertyResolver resolver, InetUtils inetUtils) {
         String hostname = inetUtils.findFirstNonLoopBackHostInfo().getIpAddress();
@@ -48,6 +72,14 @@ public class CloudCommonIdUtil {
         return combineParts(hostname, SEPARATOR, appName);
     }
 
+    /**
+     * Combine parts.
+     *
+     * @param firstPart  first part
+     * @param separator  separator
+     * @param secondPart second part
+     * @return combined
+     */
     public static String combineParts(String firstPart, String separator, String secondPart) {
         String combined = null;
         if (firstPart != null && secondPart != null) {