java中怎么递归部门树
本篇文章为大家展示了java中怎么递归部门树,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
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部门对象
package com.ytx.demo.tree; import java.util.ArrayList; import java.util.List; public class Department { private int id; private String name; private int parentId; private Listchildren = new ArrayList (); public Department(int id, String name, int parentId) { this.id = id; this.name = name; this.parentId = parentId; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getParentId() { return parentId; } public void setParentId(int parentId) { this.parentId = parentId; } public List getChildren() { return children; } public void setChildren(List children) { this.children = children; } }
递归实现
package com.ytx.demo.tree; import java.util.ArrayList; import java.util.List; public class DempartmentThree { public static void main(String[] args) { ListdepartmentList = new ArrayList<>(); departmentList.add(new Department(1, "研发部门", 0)); departmentList.add(new Department(2, "研发团队1", 1)); departmentList.add(new Department(3, "研发团队2", 1)); departmentList.add(new Department(4, "财务部门", 0)); departmentList.add(new Department(5, "财务A部门", 4)); departmentList.add(new Department(6, "财务B部门", 4)); departmentList.add(new Department(7, "财务A部门团队1", 5)); departmentList.add(new Department(8, "财务A部门团队2", 5)); departmentList.add(new Department(9, "财务B部门团队1", 6)); departmentList.add(new Department(10, "财务B部门团队2", 6)); List listTree = getThree(departmentList,0); System.out.println(listTree); } private static List getThree(List list,int parentId){ //获取所有子节点 List childTreeList = getChildTree(list,parentId); for (Department dept:childTreeList) { dept.setChildren(getThree(list,dept.getId())); } return childTreeList; } private static List getChildTree(List list,int id){ List childTree = new ArrayList<>(); for (Department dept:list) { if(dept.getParentId() == id){ childTree.add(dept); } } return childTree; } }
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