java ztree 異步加載_zTree樹形插件異步加載方法詳解

本文執行個體為大家分享了zTree樹形插件異步加載，Struts2架構，供大家參考，具體内容如下

異步加載

上面呢，是jsp頁面的代碼，因為是純插件測試，可以直接複制過去使用的，

action層代碼，可以直接複制使用

list=null;

try {

list=ztreeService.getMenusById(ztree);

} catch (Exception e) {

e.printStackTrace();

}

super.writeJson(list);

}

getMenusById(Ztree ztree) throws Exception;

//接口

//service代碼，幾本都可以複制使用

package com.jk.service.impl;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Repository;

import com.jk.dao.ZtreeDao;

import com.jk.model.Ztree;

import com.jk.service.ZtreeService;

@Repository("ztreeService")

public class ZtreeServiceImpl implements ZtreeService {

@Autowired

private ZtreeDao ztreeDao;

@Override

public List queryList(Ztree ztree) throws Exception {

String hql=" from Ztree where 1=1 ";

Map params = new HashMap();

//傳的對象是否為空，拼接sql+id

if(ztree.getId()!=null){

hql+=" and id = :id ";

params.put("id",ztree.getId());

}

return ztreeDao.queryList(hql,params);

}

//遞歸查詢

@Override

public ListgetMenusById(Ztree ztree) throws Exception {

String hql=" from Ztree where 1=1 ";

Map params=new HashMap();

if(ztree.getId()==null||ztree.getId().equals("")){

hql+=" and pid is null ";

}else{

hql+= " and pid = :id ";

params.put("id",ztree.getId());

}

ListqueryZtree = ztreeDao.queryList(hql,params);

Listlist=new ArrayList();

for(Ztree ztree2:queryZtree){

if(queryBoolean(ztree2)){

ztree2.setIsParent("true");

}

list.add(ztree2);

}

return list;

}

//熟悉遞歸的朋友應該可以看懂，我就不解釋了，我也聊不清楚這個遞歸，不誤導了，代碼在這，可以複制進去直接運作，

public boolean queryBoolean(Ztree ztree) throws Exception{

boolean flag=false;

String hql= " from Ztree where pid = :id ";

Map();

params.put("id",ztree.getId());

List queryZtree = ztreeDao.queryList(hql,params);

if(queryZtree!=null&&queryZtree.size()>0){

flag=true;

}

return flag;

}

}