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public class TreeTest { private Integer id; private Integer pId; private String name; private List<TreeTest>children; public TreeTest() { } public Tre 阅读全文
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public static List removeDuplicateWithOrder(List list) { Set set = new HashSet(); List newList = new ArrayList(); for (Iterator iter = list.iterator() 阅读全文
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通过子节点向根节点追朔. select * from persons.dept start with deptid=76 connect by prior paredeptid=deptid 通过根节点遍历子节点(不包含根节点). select * from persons.dept start w 阅读全文