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Detailed explanation of the sample code of Java easyui tree table TreeGrid (picture)

黄舟

Mar 17, 2017 am 10:07 AM

easyuijava

This article mainly introduces the implementation code of Java easyui tree table TreeGrid in detail. It has certain reference value. Interested friends can refer to it.

I spent an afternoon and finally finally Implemented data grid using JAVA. Record the implemented code. (PS: The easyui here is version 1.5, the author only posted the core code)

Implementation diagram

Detailed explanation of the sample code of Java easyui tree table TreeGrid (picture)

JSP page

<head>
//权限列表
$( document ).ready(function(){
      var parentId = 0;
      $(&#39;#tt&#39;).treegrid({  
        url:&#39;queryPrivilege.action?parentId=&#39;+parentId,  
        idField:&#39;id&#39;,  
        treeField:&#39;RecordStatus&#39;,
        columns:[[  
          {title:&#39;id&#39;,field:&#39;id&#39;,width:180}, 
          {field:&#39;RecordStatus&#39;,title:&#39;RecordStatus&#39;,width:180} ,
          {field:&#39;PrivilegeOperation&#39;,title:&#39;PrivilegeOperation&#39;,width:180}  
        ]],
        onBeforeExpand:function(row){
          //动态设置展开查询的url
          $(this).treegrid(&#39;options&#39;).url = &#39;queryPrivilege.action?parentId=&#39;+row.id;  
        }
      }); 
    })
 </script>
 </head>
 <body>
<table id="tt" style="width:600px;height:400px"></table>
</body>

ACTION layer code

  //输出
    public PrintWriter out()throws IOException{
      HttpServletResponse response=ServletActionContext.getResponse(); 
      response.setContentType("text/html"); 
      response.setContentType("text/plain; charset=utf-8");
      PrintWriter out= response.getWriter();
      return out;
    }  
  public String queryPrivilege() throws IOException{
    returnpd="ok";
    JSONArray array =new JSONArray();    
    array = privilegeService.getMenu(parentId);
    String str=array.toString();
    out().print(str);
    out().flush();
    out().close();
    return returnpd;
  }

Service layerInterfacecode

JSONArray getMenu(int parentId);

ServiceImpl layer code (implementing the service layer)

@Override
  public JSONArray getMenu(int parentId) {
    // TODO Auto-generated method stub
    return (JSONArray)privilegeDao.getMenu(parentId);
  }

Dao layer code

JSONArray getMenu(int parentId);

DaoImpl layer code (implementing Dao layer)

  @Override
  public JSONArray getMenu(int parentId) {
    // TODO Auto-generated method stub
    String hql="";
    JSONArray array=new JSONArray();
    hql="FROM Privilege p WHERE p.parentID = "+parentId;
    for(Privilege privilege:(List<Privilege>)(getSession().createQuery(hql).list())){
      JSONObject jo=new JSONObject();
      jo.put("id", privilege.getId());
      jo.put("RecordStatus", privilege.getRecordStatus());
      jo.put("parendId",privilege.getParentID());
       if(privilege.getParentID()==0){
          jo.put("state","closed");        
        }
        else{
          jo.put("state","open");
          System.out.println(parentId);
        }
      array.add(jo);
    }
    return array;
  }

Database overview

Detailed explanation of the sample code of Java easyui tree table TreeGrid (picture)

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