坐井观天

private  Node parent;  // 父对象
private  Set children  =   new  HashSet();  // 孩子集合

 1 < many-to-one
 2              name ="parent"
 3             class ="com.norteksoft.bom.model.Node"
 4             cascade ="none"
 5             outer-join ="auto"
 6             column ="FK_NODE_ID"
 7          />
 8
 9          < set
10              name ="children"
11             lazy ="true"
12             cascade ="all"
13             sort ="unsorted"
14          >
15
16                < key
17                    column ="FK_NODE_ID"
18                >
19                </ key >
20
21                < one-to-many
22                    class ="com.norteksoft.bom.model.Node"
23                />
24
25          </ set >
26
27

 1   /**
 2    * 查询所有孩子节点
 3    * @param node Node
 4    * @param list List
 5    * @return List
 6    */
 7   public List findAllChildrenNodes(Node node, List list) {
 8     if (node.getChildren().size() == 0) {
 9       return list;
10     } else {
11       for (Iterator it = node.getChildren().iterator(); it.hasNext(); ) {
12         Node theNode = (Node) it.next();
13         list.add(theNode);
14         findAllChildrenNodes(theNode, list);
15       }
16
17       return list;
18     }
19   }
20
21