No property month found for type **TbExamResult**!

Caused by: org.springframework.data.mapping.PropertyReferenceException: No property month found for type TbExamResult!

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘tbExamResultDao‘: Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property month found for type TbExamResult!

报错原因：
在实体TbExamResult类中month字段命名为tradeMonth
而在tbExamResultDao 中的findByMonth 函数中却写成了Month

解决方法：
把findByMonth改成 findByTradeMonth即可

总结：
实体属性命名时，首字母要小写。而findBy函数中则把首字母大写