controller层 抛出空指针 NullPointerException

请检查是否正确注入 service

低级错误。使用@Autowired关键字 或者 final + lombok 的@RequiredArgsConstructor注入:

另外提一句,用 关键字java.lang.NullPointerException: null controller在百度怎么都搜不到正确解答,用Google第一条就是 ,还是尝试多用谷歌吧。。。

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