update

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/vo/Change.java

+package com.ctrip.framework.apollo.portal.entity.vo;
+
+import com.ctrip.framework.apollo.portal.enums.ChangeType;
+
+public class Change {
+
+  private ChangeType type;
+  private EntityPair<KVEntity> entity;
+
+  public Change(ChangeType type, EntityPair<KVEntity> entity) {
+    this.type = type;
+    this.entity = entity;
+  }
+
+  public ChangeType getType() {
+    return type;
+  }
+
+  public void setType(ChangeType type) {
+    this.type = type;
+  }
+
+  public EntityPair<KVEntity> getEntity() {
+    return entity;
+  }
+
+  public void setEntity(
+      EntityPair<KVEntity> entity) {
+    this.entity = entity;
+  }
+}

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/vo/ReleaseCompareResult.java

 package com.ctrip.framework.apollo.portal.entity.vo;
 
+import com.ctrip.framework.apollo.portal.enums.ChangeType;
+
 import java.util.LinkedList;
 import java.util.List;
 
@@ -19,35 +21,4 @@ public class ReleaseCompareResult {
     this.changes = changes;
   }
 
-  public class Change {
-
-    private ChangeType type;
-    private EntityPair<KVEntity> entity;
-
-    public Change(ChangeType type, EntityPair<KVEntity> entity) {
-      this.type = type;
-      this.entity = entity;
-    }
-
-    public ChangeType getType() {
-      return type;
-    }
-
-    public void setType(ChangeType type) {
-      this.type = type;
-    }
-
-    public EntityPair<KVEntity> getEntity() {
-      return entity;
-    }
-
-    public void setEntity(
-        EntityPair<KVEntity> entity) {
-      this.entity = entity;
-    }
-  }
-
-  public enum ChangeType {
-    ADD, MODIFY, DELETE
-  }
 }

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/enums/ChangeType.java

+package com.ctrip.framework.apollo.portal.enums;
+
+public enum  ChangeType {
+  ADD, MODIFY, DELETE
+}

apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ReleaseService.java

@@ -12,6 +12,7 @@ import com.ctrip.framework.apollo.portal.entity.form.NamespaceReleaseModel;
 import com.ctrip.framework.apollo.portal.entity.vo.KVEntity;
 import com.ctrip.framework.apollo.portal.entity.vo.ReleaseCompareResult;
 import com.ctrip.framework.apollo.portal.entity.vo.ReleaseVO;
+import com.ctrip.framework.apollo.portal.enums.ChangeType;
 import com.dianping.cat.Cat;
 
 import org.springframework.beans.factory.annotation.Autowired;
@@ -100,10 +101,10 @@ public class ReleaseService {
       String secondValue = secondItems.get(key);
       //added
       if (secondValue == null) {
-        compareResult.addEntityPair(ReleaseCompareResult.ChangeType.DELETE, new KVEntity(key, firstValue),
+        compareResult.addEntityPair(ChangeType.DELETE, new KVEntity(key, firstValue),
                                     new KVEntity(key, secondValue));
       } else if (!Objects.equal(firstValue, secondValue)) {
-        compareResult.addEntityPair(ReleaseCompareResult.ChangeType.MODIFY, new KVEntity(key, firstValue),
+        compareResult.addEntityPair(ChangeType.MODIFY, new KVEntity(key, firstValue),
                                     new KVEntity(key, secondValue));
       }
 
@@ -115,7 +116,7 @@ public class ReleaseService {
       String value = entry.getValue();
       if (firstItems.get(key) == null) {
         compareResult
-            .addEntityPair(ReleaseCompareResult.ChangeType.ADD, new KVEntity(key, ""), new KVEntity(key, value));
+            .addEntityPair(ChangeType.ADD, new KVEntity(key, ""), new KVEntity(key, value));
       }
 
     }