错误代码

<mapper namespace="com.axr.mypro.mapper.PastebinMapper"><insert id="add" useGeneratedKeys="true" keyProperty="id">insert into pastebin(language, content)values (#{language}, #{content})</insert>
</mapper>

Integer add(Pastebin pastebin);

Integer id = pastebinMapper.add(pastebin).getId();System.out.println(id);
return Result.success(id);

查看控制台，输出内容为1

正确代码

<mapper namespace="com.axr.mypro.mapper.PastebinMapper"><insert id="add" useGeneratedKeys="true" keyProperty="id">insert into pastebin(language, content)values (#{language}, #{content})</insert>
</mapper>

void add(Pastebin pastebin);

pastebinMapper.add(pastebin);
Integer id = pastebin.getId();
return Result.success(id);return Result.success(id);

希望可以帮助到你