规范数据库，解决bug

src/main/java/com/genersoft/iot/vmp/utils/node/BaseNode.java

@@ -18,7 +18,7 @@ public class BaseNode<T> implements INode<T> {
 	/**
 	 * 主键ID
 	 */
-	protected String id;
+	protected int id;
 
 	/**
 	 * 父节点ID

src/main/java/com/genersoft/iot/vmp/utils/node/ForestNode.java

@@ -19,7 +19,7 @@ public class ForestNode extends BaseNode<ForestNode> {
 	 */
 	private Object content;
 
-	public ForestNode(String id, String parentId, Object content) {
+	public ForestNode(int id, String parentId, Object content) {
 		this.id = id;
 		this.parentId = parentId;
 		this.content = content;

src/main/java/com/genersoft/iot/vmp/utils/node/ForestNodeManager.java

@@ -17,12 +17,12 @@ public class ForestNodeManager<T extends INode<T>> {
 	/**
 	 * 森林的所有节点
 	 */
-	private final ImmutableMap<String, T> nodeMap;
+	private final ImmutableMap<Integer, T> nodeMap;
 
 	/**
 	 * 森林的父节点ID
 	 */
-	private final Map<String, Object> parentIdMap = Maps.newHashMap();
+	private final Map<Integer, Object> parentIdMap = Maps.newHashMap();
 
 	public ForestNodeManager(List<T> nodes) {
 		nodeMap = Maps.uniqueIndex(nodes, INode::getId);
@@ -46,7 +46,7 @@ public class ForestNodeManager<T extends INode<T>> {
 	 *
 	 * @param parentId 父节点ID
 	 */
-	public void addParentId(String parentId) {
+	public void addParentId(int parentId) {
 		parentIdMap.put(parentId, "");
 	}
 

src/main/java/com/genersoft/iot/vmp/utils/node/INode.java

@@ -14,7 +14,7 @@ public interface INode<T> extends Serializable {
 	 *
 	 * @return String
 	 */
-	String getId();
+	int getId();
 
 	/**
 	 * 父主键