摘要:
org.springframework.dao.InvalidDataAccessResourceUsageException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.S 阅读全文
摘要:
用Repository实体查询是总是提示要java.util.Optional 在使用springboot 方法报错: Inferred type 'S' for type parameter 'S' is not within its bound; should extends xxxxxx 解决 阅读全文