在rich:tree中如果想要在頁面中初始化tree的展開和選中狀態或者在頁面更改后返回時保持之前的狀態，
可以設置tree的adviseNodeOpened 和 adviseNodeSelected屬性。
| adviseNodeOpened |
false |
false |
javax.el.MethodExpression
(signature must match
java.lang.Boolean adviseNodeOpened(org.richfaces.component.UITree))
|
MethodBinding pointing at a method accepting an
org.richfaces.component.UITree with return of java.lang.Boolean type.
If returned value is: java.lang.Boolean. TRUE, a particular treeNode is
expanded; java.lang.Boolean.FALSE, a particular treeNode is collapsed;
null, a particular treeNode saves the current state |
| adviseNodeSelected |
false |
false |
javax.el.MethodExpression
(signature must match
java.lang.Boolean adviseNodeSelected(org.richfaces.component.UITree))
|
MethodBinding pointing at a method accepting an
org.richfaces.component.UITree with return of java.lang.Boolean type.
If returned value is: java.lang.Boolean. TRUE, a particular treeNode is
selected; java.lang.Boolean.FALSE, a particular treeNode is unselected;
null, a particular treeNode saves the current state |