小编D. *_*ski的帖子

 @Entity
 @NamedQueries({
   @NamedQuery(
     name = "FolderNode.findByName",
     query = "SELECT f FROM FolderNode f WHERE f.name = :name AND f.parentNode = :parentNode"),
   @NamedQuery(
     name = "FolderNode.findRootNodeByName",
     query = "SELECT f FROM FolderNode f WHERE f.name = :name AND f.parentNode is null")
 })
 public class FolderNode extends InstructorTreeNode {
   public FolderNode() {
     super();
   }

   public FolderNode(String name) {
     this();
     setName(name);
   }

   public FolderNode(int sortOrder, String name) {
     this(name);
     this.sortOrder = sortOrder;
   }

   public FolderNode(int sortOrder, String name, EmployeeState status) {
     this(sortOrder, name); …