12 2021 档案

jndi和rmi学习
摘要:1.程序1启动rmi管理服务 System.out.println("Creating evil RMI registry on port 9527");LocateRegistry.createRegistry(1111);System.out.println(" 启动Rmi成功! ");Thre 阅读全文
posted @ 2021-12-27 10:35 liujiwei0632 阅读(313) 评论(0) 推荐(0)
mysql赋值变量:=的使用
摘要:/**查询近两周销量,按照日期分组**/select tpdate.dateStr,ifnull(tpdata.count,0) as count from (SELECT @rownum:=@rownum+1 as count,date_add(DATE_FORMAT(now(),'%Y-%m-% 阅读全文
posted @ 2021-12-02 17:06 liujiwei0632 阅读(271) 评论(0) 推荐(0)