diff --git a/Node.java b/Node.java
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+// 多行注释，说明版权信息和许可证
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// 导入所需的类
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+
+import org.json.JSONObject;
+
+// Node类是一个抽象类，用于表示任务或节点的数据结构
+public abstract class Node {
+    // 定义同步操作的常量
+    public static final int SYNC_ACTION_NONE = 0; // 无操作
+    public static final int SYNC_ACTION_ADD_REMOTE = 1; // 远程添加
+    public static final int SYNC_ACTION_ADD_LOCAL = 2; // 本地添加
+    public static final int SYNC_ACTION_DEL_REMOTE = 3; // 远程删除
+    public static final int SYNC_ACTION_DEL_LOCAL = 4; // 本地删除
+    public static final int SYNC_ACTION_UPDATE_REMOTE = 5; // 远程更新
+    public static final int SYNC_ACTION_UPDATE_LOCAL = 6; // 本地更新
+    public static final int SYNC_ACTION_UPDATE_CONFLICT = 7; // 更新冲突
+    public static final int SYNC_ACTION_ERROR = 8; // 错误
+
+    // 成员变量
+    private String mGid; // 节点的全局唯一标识符
+    private String mName; // 节点的名称
+    private long mLastModified; // 节点的最后修改时间
+    private boolean mDeleted; // 节点是否被删除
+
+    // 构造函数
+    public Node() {
+        mGid = null; // 初始时，全局唯一标识符为空
+        mName = ""; // 初始时，名称为空字符串
+        mLastModified = 0; // 初始时，最后修改时间为0
+        mDeleted = false; // 初始时，节点未被删除
+    }
+
+    // 获取创建操作的JSON对象
+    public abstract JSONObject getCreateAction(int actionId);
+
+    // 获取更新操作的JSON对象
+    public abstract JSONObject getUpdateAction(int actionId);
+
+    // 根据远程JSON对象设置内容
+    public abstract void setContentByRemoteJSON(JSONObject js);
+
+    // 根据本地JSON对象设置内容
+    public abstract void setContentByLocalJSON(JSONObject js);
+
+    // 从内容获取本地JSON对象
+    public abstract JSONObject getLocalJSONFromContent();
+
+    // 获取同步操作
+    public abstract int getSyncAction(Cursor c);
+
+    // 设置全局唯一标识符
+    public void setGid(String gid) {
+        this.mGid = gid;
+    }
+
+    // 设置节点名称
+    public void setName(String name) {
+        this.mName = name;
+    }
+
+    // 设置最后修改时间
+    public void setLastModified(long lastModified) {
+        this.mLastModified = lastModified;
+    }
+
+    // 设置节点是否被删除
+    public void setDeleted(boolean deleted) {
+        this.mDeleted = deleted;
+    }
+
+    // 获取全局唯一标识符
+    public String getGid() {
+        return this.mGid;
+    }
+
+    // 获取节点名称
+    public String getName() {
+        return this.mName;
+    }
+
+    // 获取最后修改时间
+    public long getLastModified() {
+        return this.mLastModified;
+    }
+
+    // 获取节点是否被删除
+    public boolean getDeleted() {
+        return this.mDeleted;
+    }
+
+}
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