摘要：
查看防火墙开放的端口 firewall-cmd --list-ports FirewallD is not running 查看防火墙状态 systemctl status firewalld 开启防火墙 systemctl start firewalld 关闭防火墙防火墙 systemctl st 阅读全文
摘要：
File excelFile = new File("v:\\工作簿1.xlsx"); XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(excelFile)); XSSFSheet sheet = wb.getSheetAt(0); Sy 阅读全文