zTree树形插件异步加载方法详解

本文实例为大家分享了zTree树形插件异步加载,Struts2框架,供大家参考,具体内容如下





异步加载










  

    上面呢,是jsp页面的代码,因为是纯插件测试,可以直接复制过去使用的,

    action层代码,可以直接复制使用

    public void getMenusById(){
        List list=null;
        try {
          list=ztreeService.getMenusById(ztree);
        } catch (Exception e) {
          e.printStackTrace();
        }
        super.writeJson(list);
    }
    
    public List getMenusById(Ztree ztree) throws Exception;
    //接口
    

    //service代码,几本都可以复制使用
    
    
    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();
    //传的对象是否为空,拼接sql+id
          if(ztree.getId()!=null){
            hql+=" and id = :id ";
            params.put("id",ztree.getId());
          }
        
        
        return ztreeDao.queryList(hql, params);
      }
      //递归查询
      @Override
      public List getMenusById(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());
        }
        List queryZtree = ztreeDao.queryList(hql, params);
        List list=new ArrayList();
        for(Ztree ztree2:queryZtree){
          if(queryBoolean(ztree2)){
            ztree2.setIsParent("true");
          }
          list.add(ztree2);
        }
        return list;
      }
      //熟悉递归的朋友应该可以看懂,我就不解释了,我也聊不清楚这个递归,不误导了,代码在这,可以复制进去直接运行,
      public boolean queryBoolean(Ztree ztree) throws Exception{
        boolean flag=false;
        String hql= " from Ztree where pid = :id ";
        
        Map params=new HashMap();
        params.put("id", ztree.getId());
        List queryZtree = ztreeDao.queryList(hql, params);
        if(queryZtree!=null&&queryZtree.size()>0){
          flag=true;
        }
        return flag;
      }
    
      
    }
    
    

    dao层就不用写了吧,只是一个查询,下面我把ztree的表字段附上

    zTree树形插件异步加载方法详解_第1张图片

    以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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