Java easyui树形表格TreeGrid的实现代码

自己搞了一下午，终于用JAVA实现了数据网格。记录一下实现的代码。（PS：此处的easyui是1.5版本，楼主只贴了核心的代码）

实现图

JSP页面

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

ACTION层代码

  //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层接口代码

JSONArray getMenu(int parentId);

ServiceImpl层代码（实现service层）

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

Dao层代码

JSONArray getMenu(int parentId);

DaoImpl层代码（实现Dao层）

  @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;
  }

数据库一览

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