最强Java代表

摘要： 举例说明： String url ="www.xxx.com/s?index=%d"; for(int i=1;i<=5;i++) { String format = String.format(url, i); System.out.println(format);执行结果： www.xxx.co 阅读全文

摘要： mysql遇见Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre的问题 报错如下 Expression #1 of SELECT list is not in GROUP BY clause and 阅读全文