文章目錄

• 簡單介紹
• 一、打印效果
• 二、數(shù)據(jù)庫表結(jié)構(gòu)
• 三 實(shí)體
• 四、代碼實(shí)現(xiàn)
• • 2.1 獲取樹形結(jié)構(gòu)
  • 2.2 添加子節(jié)點(diǎn)【回復(fù)評論】

簡單介紹

一、打印效果

{"msg": "success","code": 200,"data": [{"createTime": "2021-08-17 08:46:13","updateTime": "2021-08-17 08:46:15","id": 1,"pid": 0,"uid": 1,"aid": 1,"content": "文章非常好，學(xué)到了很多，關(guān)注你了","support": 0,"isDelete": 0,"child": [{"createTime": "2021-08-19 11:59:08","updateTime": "2021-08-19 11:59:12","id": 3,"pid": 1,"uid": 3,"aid": 1,"content": "我也關(guān)注他了，兄弟","support": 0,"isDelete": 0,"child": [{"createTime": "2021-08-19 12:06:24","updateTime": "2021-08-19 12:06:25","id": 4,"pid": 3,"uid": 4,"aid": 1,"content": "你關(guān)注他干嘛","support": 0,"isDelete": 0,"child": null}]}]},{"createTime": "2021-08-19 11:58:10","updateTime": "2021-08-19 11:58:11","id": 2,"pid": 0,"uid": 2,"aid": 1,"content": "博主關(guān)注一下我，我關(guān)注博主了","support": 25,"isDelete": 0,"child": null}] }

二、數(shù)據(jù)庫表結(jié)構(gòu)

DROP TABLE IF EXISTS `comment`;CREATE TABLE `comment` (`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主鍵',`pid` int(11) NOT NULL DEFAULT '0' COMMENT '父級評論ID',`uid` int(11) NOT NULL COMMENT '評論者ID',`aid` int(20) NOT NULL COMMENT '被評論的文章ID',`content` text NOT NULL COMMENT '評論的內(nèi)容',`support` int(20) NOT NULL DEFAULT '0' COMMENT '點(diǎn)贊數(shù)',`is_delete` int(4) NOT NULL DEFAULT '0' COMMENT '是否刪除：1刪除 0未刪除',`create_time` datetime NOT NULL COMMENT '創(chuàng)建時間',`update_time` datetime NOT NULL COMMENT '更新時間',PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8mb4;

三 實(shí)體

@Data @TableName("comment") public class Comment extends BaseEntity {private static final Long serialVersionUID = 1L;/*** 主鍵*/@TableId(type = IdType.AUTO)private Integer id;/*** 父級評論ID*/private Integer pid;/*** 評論者ID*/private Integer uid;/*** 被評論的文章ID*/private Integer aid;/*** 評論的內(nèi)容*/private String content;/*** 點(diǎn)贊數(shù)*/private Integer support;/*** 是否刪除：1刪除 0未刪除*/private Integer isDelete;/*** 子評論*/@TableField(exist = false)private List<Comment> child; }

四、代碼實(shí)現(xiàn)

2.1 獲取樹形結(jié)構(gòu)

/*** 獲取樹形結(jié)構(gòu)* @param list 需要轉(zhuǎn)換的列表* @return*/private List<Comment> getTree(List<Comment> list) {List<Comment> treeList = new ArrayList<>();for (Comment comment : list) {if (comment.getPid().equals(0)) {treeList.add(getChild(comment, list));}}return treeList;}

2.2 添加子節(jié)點(diǎn)【回復(fù)評論】

/*** 獲取孩子節(jié)點(diǎn)* @param comment 評論當(dāng)前節(jié)點(diǎn)* @param list 列表* @return*/private Comment getChild(Comment comment, List<Comment> list) {for (Comment c : list) {if (comment.getId().equals(c.getPid())) {if (comment.getChild() == null) {comment.setChild(new ArrayList<Comment>());}comment.getChild().add(getChild(c, list));}}return comment;}

---

總結(jié)

以上是生活随笔為你收集整理的博客系统评论模块列表转树形结构的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。