关于递归调用，实现树形菜单的样式

 1 import java.util.Date;
 2 import java.util.List;
 3 
 4 import com.fasterxml.jackson.annotation.JsonFormat;
 5 
 6 import lombok.Data;
 7 @Data
 8 public class BsChannelPostReply {
 9     private long replyId;
10     private String niceName;
11     @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8") 
12     private Date replyDate;
13     private String content;
14     private long directRepliedId;//回复的直接评论的replyId
15     private List<BsChannelPostReply> children;//下面的子评论
16 }

 1 @Override
 2     @Datasource(value="community")//切换数据源
 3     public List<BsChannelPostReply> getMainReply(int postId) {
 4         // TODO Auto-generated method stub
 5         List<BsChannelPostReply> listMain=dao.getMainReply(postId);//获取主评论
 6         if(listMain.size()>=0){//如果主评论不为空
 7             for (BsChannelPostReply bsChannelPostReply : listMain) {
 8                 bsChannelPostReply.setChildren(getMainReplyChildren(bsChannelPostReply.getReplyId()));//加载子评论
 9             }
10         }
11         return listMain;
12     }
13 
14     @Override
15     @Datasource(value="community")//切换数据源
16     public List<BsChannelPostReply> getMainReplyChildren(long replyId) {
17         // TODO Auto-generated method stub
18         List<BsChannelPostReply> listChildren=dao.getMainReplyChildren(replyId);//根据当前的replayId获取当前级子评论列表
19             if(listChildren.size()>=0){
20             for (BsChannelPostReply bsChannelPostReply : listChildren) {
21                 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
22             }
23         }
24         return listChildren;
25     }