焱童鞋

1.实体类@Datapublic class User implements Serializable { private Integer id; private String userName; private String realName; private String password; private Integer age; private Integer dId; private ArrayList<String

1.新建一个springBoot项目：2.pom.xml中添加如下依赖： <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.0.RELEASE</version> &l

sql 语句如下:SET @i = 0;SELECT cc.* ,(@i:=@i+cc.当日注册人数) as 累计注册人数FROM (SELECT DATE_FORMAT(create_time,'%Y-%m-%d') as "日期" , count(*) as "当日注册人数" FROM user_t GROUP BY 日期)cc CROSS JOIN (select ...

最近遇到单体架构tomcat的项目遇到高并发出现阻塞的情况，考虑方向如上：1.Docker安装：centos 下载docker：yum -y install docker-io 启动容器：service docker restart 2.Mysql安装：docker pull mysqldocker run -p 3306:3306 --name mysql02 -e...