mysql int bigint范围
INT[(M)] [UNSIGNED] [ZEROFILL]
A normal-size integer. The signed range is -2147483648
to 2147483647
. The unsigned range is 0
to 4294967295
.
BIGINT[(M)] [UNSIGNED] [ZEROFILL]
A large integer. The signed range is -9223372036854775808
to 9223372036854775807
. The unsigned range is 0
to 18446744073709551615
.
项目生成id范围设置小了,并且使用parseInt方式解析,导致超过2147483647即出错,解析方式改为parseLong,但目前还有隐患,数据库的类型设置的是INT而不是BIGINT,超出的话就无法生成。
通过/etc/init.d/iptables status命令查询是否有打开80端口,如果没有可通过两种方式处理: 1. 命令行 iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT 2.修改vi /etc/sysconfig/iptables命令添加使防火墙开放80端口
3.关闭/开启/重启防火墙