摘要：
一：wenconfig@Configuration public class CorsConfig implements WebMvcConfigurer { @Override public void addCorsMappings(CorsRegistry registry) { registr 阅读全文
摘要：
select field ，count(1) from table group by filed having count(1)>1 t 查找出你要删除的数据 delect from table where filed not in select t.field ( (select field fr 阅读全文