创新实训——评论接口和点赞接口的实现

最新推荐文章于 2025-05-01 23:48:26 发布

原创最新推荐文章于 2025-05-01 23:48:26 发布 · 1.5k 阅读

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CC 4.0 BY-SA版权

博客介绍了评论接口和点赞接口。评论接口包含评论的用户id、内容、时间；点赞接口支持点赞和取消赞，每个帖子的点赞会将用户id存于json字符串，取消赞时移除对应id，还给出了关键代码。

1.评论接口

添加评论接口包括评论的用户id、内容、时间。

关键代码：

                sql = "SELECT comments FROM moment WHERE mid=?";
                statement = conn.prepareStatement(sql);
                statement.setInt(1, Integer.parseInt(mid));
                resultSet = statement.executeQuery();
                if (resultSet.next()) {
                    String comments = resultSet.getString("comments");
                    if (Integer.parseInt(type) == BaseConsts.TYPE_APPEND) {
                        comments = appendComment(comments, uid, text);
                    } else if (Integer.parseInt(type) == BaseConsts.TYPE_REMOVE) {
                        comments = removeComment(comments, uid, text);
                    }
                    sql = "UPDATE moment SET comments=? WHERE mid=?";
                    statement = conn.prepareStatement(sql);
                    statement.setString(1, comments);
                    statement.setInt(2, Integer.parseInt(mid));
                    statement.executeUpdate();
                    status.setStatus(BaseConsts.STATUS_SUCESSED);
                }

2.点赞接口

点赞接口支持点赞和取消赞，对于每个帖子的点赞都会将点赞的用户id存放到json格式的字符串里，取消赞的时候将用户id从该字符串取消即可。

关键代码：

                sql = "SELECT likes FROM moment WHERE mid=?";
                statement = conn.prepareStatement(sql);
                statement.setInt(1, Integer.parseInt(mid));
                resultSet = statement.executeQuery();
                if (resultSet.next()) {
                    String likes = resultSet.getString("likes");
                    if (Integer.parseInt(type) == BaseConsts.TYPE_APPEND) {
                        likes = appendLike(likes, uid);
                    } else if (Integer.parseInt(type) == BaseConsts.TYPE_REMOVE) {
                        likes = removeLike(likes, uid);
                    }
                    sql = "UPDATE moment SET likes=? WHERE mid=?";
                    statement = conn.prepareStatement(sql);
                    statement.setString(1, likes);
                    statement.setInt(2, Integer.parseInt(mid));
                    statement.executeUpdate();
                    status.setStatus(BaseConsts.STATUS_SUCESSED);
                }