The method findOne(Example) in the type QueryByExampleExecutor is not applicable for the
2020-06-02 05:10
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问题描述：The method findOne(Example) in the type QueryByExampleExecutor is not applicable for the arguments (int)
问题原因：新版本的springboot没有findOne(int id)这个方法了
解决方案：使用findById(Integer id).orElse(null)，这里表示，如果id存在则返回需要查找的信息，如果不存在，这里设置为返回null（推荐）
参考：
https://blog.csdn.net/ken1583096683/article/details/81989580
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