java利用递归调用实现树形菜单的样式

import java.util.date;

import java.util.list;

import com.fasterxml.jackson.annotation.jsonformat;

import lombok.data;

@data

public class bschannelpostreply {

private long replyid;

private string nicename;

@jsonformat (pattern= "yyyy-mm-dd hh:mm:ss" ,timezone = "gmt+8" )

private date replydate;

private string content;

private long directrepliedid; //回复的直接评论的replyid

private list<bschannelpostreply> children; //下面的子评论

}

@override

@datasource (value= "community" ) //切换数据源

public list<bschannelpostreply> getmainreply( int postid) {

  // todo auto-generated method stub

  list<bschannelpostreply> listmain=dao.getmainreply(postid); //获取主评论

  if (listmain.size()>= 0 ){ //如果主评论不为空

  for (bschannelpostreply bschannelpostreply : listmain) {

   bschannelpostreply.setchildren(getmainreplychildren(bschannelpostreply.getreplyid())); //加载子评论

  }

  }

  return listmain;

}

@override

@datasource (value= "community" ) //切换数据源

public list<bschannelpostreply> getmainreplychildren( long replyid) {

  // todo auto-generated method stub

  list<bschannelpostreply> listchildren=dao.getmainreplychildren(replyid); //根据当前的replayid获取当前级子评论列表

  if (listchildren.size()>= 0 ){

  for (bschannelpostreply bschannelpostreply : listchildren) {

   bschannelpostreply.setchildren(getmainreplychildren(bschannelpostreply.getreplyid())); //在判断当前子评论是否还有子评论，递归调用，直到没有子评论

  }

  }

  return listchildren;

}