diff --git a/src/main/java/com/serliunx/ddns/config/AbstractConfiguration.java b/src/main/java/com/serliunx/ddns/config/AbstractConfiguration.java
index b506a70..a1de06b 100644
--- a/src/main/java/com/serliunx/ddns/config/AbstractConfiguration.java
+++ b/src/main/java/com/serliunx/ddns/config/AbstractConfiguration.java
@@ -86,8 +86,21 @@ public abstract class AbstractConfiguration implements Configuration {
     }
 
     @Override
-    public <T extends Enum<?>> Enum<?> getEnum(Class<T> clazz, String key) {
-        return null;
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    public <T extends Enum> T getEnum(Class<T> clazz, String key) {
+        String rawValue = getString(key);
+        Assert.notNull(rawValue);
+        return (T)Enum.valueOf(clazz, rawValue);
+    }
+
+    @Override
+    @SuppressWarnings({"rawtypes"})
+    public <T extends Enum> T getEnum(Class<T> clazz, String key, T defaultValue) {
+        T value = null;
+        try {
+            value = getEnum(clazz, key);
+        }catch (Exception ignored){}
+        return value == null ? defaultValue : value;
     }
 
     /**
diff --git a/src/main/java/com/serliunx/ddns/config/Configuration.java b/src/main/java/com/serliunx/ddns/config/Configuration.java
index 9b89f93..a814c0e 100644
--- a/src/main/java/com/serliunx/ddns/config/Configuration.java
+++ b/src/main/java/com/serliunx/ddns/config/Configuration.java
@@ -3,6 +3,7 @@ package com.serliunx.ddns.config;
 import com.serliunx.ddns.support.Refreshable;
 
 /**
+ * 配置信息逻辑定义
  * @author SerLiunx
  * @since 1.0
  */
@@ -68,5 +69,24 @@ public interface Configuration extends Refreshable {
      */
     Boolean getBoolean(String key, Boolean defaultValue);
 
-    <T extends Enum<?>> Enum<?> getEnum(Class<T> clazz, String key);
+    /**
+     * 获取枚举值
+     * @param clazz 枚举类
+     * @param key 键
+     * @return 枚举值
+     * @param <T> 枚举类型参数
+     */
+    @SuppressWarnings("rawtypes")
+    <T extends Enum> T getEnum(Class<T> clazz, String key);
+
+    /**
+     * 获取枚举值
+     * @param clazz 枚举类
+     * @param key 键
+     * @param defaultValue 默认值
+     * @return 枚举值
+     * @param <T> 枚举类型参数
+     */
+    @SuppressWarnings("rawtypes")
+    <T extends Enum> T getEnum(Class<T> clazz, String key, T defaultValue);
 }
diff --git a/src/test/java/com/serliunx/ddns/test/ContextTest.java b/src/test/java/com/serliunx/ddns/test/ContextTest.java
index de56467..7b32afa 100644
--- a/src/test/java/com/serliunx/ddns/test/ContextTest.java
+++ b/src/test/java/com/serliunx/ddns/test/ContextTest.java
@@ -14,7 +14,7 @@ import org.junit.Test;
 public class ContextTest {
 
     @Test
-    public void testContext(){
+    public void testContext() {
         GenericInstanceContext genericInstanceContext = new GenericInstanceContext();
 
         genericInstanceContext.addListableInstanceFactory(new XmlFileInstanceFactory(SystemConstants.USER_INSTANCE_DIR));
diff --git a/src/test/java/com/serliunx/ddns/test/FactoryTest.java b/src/test/java/com/serliunx/ddns/test/FactoryTest.java
index 21baca8..293d077 100644
--- a/src/test/java/com/serliunx/ddns/test/FactoryTest.java
+++ b/src/test/java/com/serliunx/ddns/test/FactoryTest.java
@@ -11,7 +11,7 @@ import org.junit.Test;
 public class FactoryTest {
 
     @Test
-    public void testYamlFileFactory(){
+    public void testYamlFileFactory() {
         YamlFileInstanceFactory factory = new YamlFileInstanceFactory(SystemConstants.USER_INSTANCE_DIR);
         factory.refresh();
         factory.getInstances().forEach(System.out::println);
diff --git a/src/test/java/com/serliunx/ddns/test/config/PropertiesConfigTest.java b/src/test/java/com/serliunx/ddns/test/config/PropertiesConfigTest.java
new file mode 100644
index 0000000..93bc35d
--- /dev/null
+++ b/src/test/java/com/serliunx/ddns/test/config/PropertiesConfigTest.java
@@ -0,0 +1,19 @@
+package com.serliunx.ddns.test.config;
+
+import com.serliunx.ddns.config.Configuration;
+import com.serliunx.ddns.config.PropertiesConfiguration;
+import com.serliunx.ddns.constant.InstanceSource;
+import com.serliunx.ddns.constant.SystemConstants;
+import org.junit.Test;
+
+public class PropertiesConfigTest {
+
+    @Test
+    public void test() {
+        Configuration configuration = new PropertiesConfiguration(SystemConstants.USER_SETTINGS_PROPERTIES_PATH);
+        configuration.refresh();
+
+        InstanceSource test = configuration.getEnum(InstanceSource.class, "test", InstanceSource.FILE_JSON);
+        System.out.println(test);
+    }
+}
diff --git a/src/test/java/com/serliunx/ddns/test/support/ClientTest.java b/src/test/java/com/serliunx/ddns/test/support/ClientTest.java
index 136c888..161fdc7 100644
--- a/src/test/java/com/serliunx/ddns/test/support/ClientTest.java
+++ b/src/test/java/com/serliunx/ddns/test/support/ClientTest.java
@@ -10,7 +10,7 @@ import org.junit.Test;
 public class ClientTest {
 
     @Test
-    public void test(){
+    public void test() {
         IPAddressClient client = IPAddressClient.instance;
         System.out.println(client.getIPAddress().getQuery());
     }