<TreeListUtil.java>

package com.*.utils;

import com.jetair.domin.Emp;
import org.apache.commons.lang.ObjectUtils;

import java.util.ArrayList;
import java.util.List;

public class TreeListUtil {

    private static List<Emp> newList;      //treeList

    public TreeListUtil(){
        newList = new ArrayList<Emp>();
    }

    /**
     * 向新list中裝入根節點並遞迴子節點
     */
    public List<Emp> setRootNode(List treeList){
        List<Emp> rootNode = getRootNode(treeList);    //獲得根節點
        for (int i = 0 ; i < rootNode.size() ; i++) {
            newList.add(rootNode.get(i));   //存入所有根節點
            sortNode(rootNode.get(i) , treeList);
        }

        return newList;
    }


    /**
     * 獲得根節點
     */
    private List<Emp> getRootNode(List treeList){
        List<Emp> rootList = new ArrayList<Emp>();    //構造返回list
        for (int i = 0 ; i < treeList.size() ; i++) {      //迴圈讀取pid等於0的根節點
            if((Integer)((Emp)treeList.get(i)).getMgr() == 0){
                rootList.add((Emp)treeList.get(i));    //放入list中
            }
        }
        return rootList;    //返回list
    }


    /**
     * 遞迴子節點
     * @param rootNode  各個根節點
     * @param treeList  存放所有節點的list
     * @return childList
     */
    private List<Emp> sortNode(Emp rootNode , List treeList){
        List<Emp> rightList = new ArrayList<Emp>();
        List<Emp> childList = getChild(rootNode,treeList);     //獲得根節點的子節點
        if(childList!=null){
            for (int i = 0 ; i < childList.size() ; i++){
                newList.add(childList.get(i));
                sortNode(childList.get(i) , treeList);       //把查出來的子節點當做父節點遞迴查詢
            }
        }
        return childList;
    }


    /**
     * 獲得根節點的子節點
     * @param treeNode 各個根節點
     * @param treeList 存放所有節點的list
     * @return childList
     */
    private List<Emp> getChild(Emp treeNode , List treeList){
        List<Emp> childList = new ArrayList<Emp>();   //構建返回list
        for (int i = 0 ; i < treeList.size() ; i++) {
            if(treeNode.getEmpno() == ((Emp)treeList.get(i)).getMgr()){  //查詢儲存根節點的子節點
                childList.add((Emp)treeList.get(i));
            }
        }
        return childList;   //返回list
    }
}
 

<Emp.java>

package com.*.domin;

import java.util.Date;
import java.util.List;


public class Emp {
    private int empno;
    private String ename;
    private String job;
    private int mgr;
    private Date hiredate;
    private int sal;
    private int comm;
    private int deptno;
    private String level;

    
    public String getLevel() {
        return level;
    }

    public void setLevel(String level) {
        this.level = level;
    }

    public int getEmpno() {
        return empno;
    }

    public void setEmpno(int empno) {
        this.empno = empno;
    }

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) {
        this.ename = ename;
    }

    public String getJob() {
        return job;
    }

    public void setJob(String job) {
        this.job = job;
    }

    public int getMgr() {
        return mgr;
    }

    public void setMgr(int mgr) {
        this.mgr = mgr;
    }

    public Date getHiredate() {
        return hiredate;
    }

    public void setHiredate(Date hiredate) {
        this.hiredate = hiredate;
    }

    public int getSal() {
        return sal;
    }

    public void setSal(int sal) {
        this.sal = sal;
    }

    public int getComm() {
        return comm;
    }

    public void setComm(int comm) {
        this.comm = comm;
    }

    public int getDeptno() {
        return deptno;
    }

    public void setDeptno(int deptno) {
        this.deptno = deptno;
    }

}
 

<EmpMapper.xml>

	<resultMap id="treeListMap" type="com.jetair.domin.Emp">
		<id column="EMPNO" property="empno"/>
		<result column="ENAME" property="ename"/>
		<result column="JOB" property="job"/>
		<result column="MGR" property="mgr"/>
		<result column="HIREDATE" property="hiredate"/>
		<result column="SAL" property="sal"/>
		<result column="COMM" property="comm"/>
		<result column="DEPTNO" property="deptno"/>
		<result column="LEVEL" property="level"/>
	</resultMap>

	<select id="getTreeList" resultMap="treeListMap">
	  SELECT
		*
      FROM
	    emp
	</select>
 

<getTree.js>

//初始化ztree控制元件
$(function () {
    $.fn.zTree.init($("#tree"), setting);
});


var setting={

    async: {
        enable: true,
        type:'post',
        url:"http://localhost:8080/handle/getTreeList.do",
        dataType : "json"
    },
    data: {
        key : {
            name : "ename"
        },
        simpleData : {   //簡單的資料來源
            enable : true,
            idKey : "empno",  // 樹的結構資訊
            pIdKey : "mgr",
            rootPId : 0  , //根節點
        }
    },
    callback: {
        onClick: zTreeOnClick
    },
    view:{
        showIcon: false,
        showLine: true
    }
};