javadoc规范、idea生成javadoc等

场景执行yum -y install 命令的时候报错，提示：error: cannot open Packages database in /var/lib/rpm解决方案先执行这2条命令，然后试下yum clean all;yum makecache;发现还是不行，继续执行以下命令：ls /var/lib/rpm/;rm -f /var/lib/rpm/__db*;再进行yum安装，发现可以的。

var mysql = require('mysql');var connection = mysql.createConnection({host: 'localhost',user: 'root',password: '1234',database: 'test',multipleStatements: true, //允许执行多条语句})connection.connect(console.

neo4j图数据库笔记

人工智能笔记

场景使用netstat -nltp命令，提示：(No info could be read for “-p”: geteuid()=1001 but you should be root.)解决方案sudo -i 切换为root用户即可。

File | Settings | Appearance & Behavior | System Settings | Updates，如图去掉勾选:

File | Settings | Build, Execution, Deployment | Build Tools | Maven | Repositories | 选中一个仓库，点击右侧的update即可

idea报错class not found

idea项目debug慢，打包慢