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连接数据库localhost和127.0.0.1的区别

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Jun 07, 2016 pm 03:22 PM

localhostthe differencedatabaseconnect

用JDBC访问Oracle，即java连接本机数据库的时候，地址用localhost和127.0.0.1都可以。但是这两者有什么区别？哪个更好？有很多人认为这两个是完全一样的，也有人认为127.0.0.1更好，因为是本地IP，不需要从域名解析。其实这两个是有很大区别的： localhost

用JDBC访问Oracle，即java连接本机数据库的时候，地址用localhost和127.0.0.1都可以。但是这两者有什么区别？哪个更好？
有很多人认为这两个是完全一样的，也有人认为127.0.0.1更好，因为是本地IP，不需要从域名解析。其实这两个是有很大区别的：

localhost也叫local ，正确解释为：本地服务器

127.0.0.1在系统的正确解释是：本机地址（本机服务器）

localhot（local）是不经网卡传输！这点很重要，它不受网络防火墙和网卡相关的的限制。访问localhost也不会解析成ip，不会占用网卡、网络资源。

而127.0.0.1是需要通过网卡传输，依赖网卡，并受到网络防火墙和网卡相关的限制。

这就是为什么有时候用localhost可以访问，但用127.0.0.1就不可以的情况。

所以还是尽量用localhost吧

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