jsp获取ip地址 [英] jsp get ip address

问题描述

什么是防止某人投票两次的最佳方法？我如何获得用户的IP地址？如果他们在大型网络上怎么办？那个网络上的每个人都会显示相同的IP吗？谢谢

whats the best way of preventing someone from voting twice? How do i get the users ip address? What if they are on a large network? will everyone on that network show the same ip? thanks

UPDATE：request.getRemoteAddr（）和request.getRemoteHost（）返回服务器名称，而不是客户端的主机名和ip。其他人有什么好主意吗？

UPDATE: request.getRemoteAddr() and request.getRemoteHost() return the Server names, not the client's host name and ip. Anyone else got any bright ideas?

好的，所以让我们忘记投票两次。我只是想获取用户的IP地址？我尝试了request.getRemoteAddr（）和request.getRemoteHost（），并认为我获取服务器地址。我可以访问两个独立的网络并获得相同的IP地址：（

Ok, so lets forget about the voting twice thing. Im just trying to get the users ip address? i tried request.getRemoteAddr() and request.getRemoteHost() and think im getting the servers address. I have access to two separate networks and am getting the same IP address :(

推荐答案

在JSP中，使用请求.getRemoteAddr（）。这将返回以字符串形式发送请求的代理的IP地址。

In your JSP, use request.getRemoteAddr(). This returns the IP address of the agent that sent the request as a String.

此外， request.getRemoteHost（） 将尝试获取完全限定的主机名。如果无法解析名称，则会返回IP地址，如 getRemoteAddr（）。

Also, request.getRemoteHost() will attempt to get the fully qualified host name. If it can't resolve the name however, the IP address will be returned as in getRemoteAddr().

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