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再做项目中获取客户端ip，因为是公司内部使用，用的都是同一个公网账号，获取的都是外网ip，造成ip都是一个。通过java代码暂时没有发现可以实现的。后来上网百度，发现了一段js可以实现获取内网ip
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h4>
Demo for:
<a href="https://github.com/diafygi/webrtc-ips">
https://github.com/diafygi/webrtc-ips
</a>
</h4>
<p>
This demo secretly makes requests to STUN servers that can log your
request. These requests do not show up in developer consoles and
cannot be blocked by browser plugins (AdBlock, Ghostery, etc.).
</p>
<h4>Your local IP addresses:</h4>
<ul></ul>
<h4>Your public IP addresses:</h4>
<ul></ul>
<script>
//get the IP addresses associated with an account
function getIPs(callback){
var ip_dups = {};
//compatibility for firefox and chrome
var RTCPeerConnection = window.RTCPeerConnection
|| window.mozRTCPeerConnection
|| window.webkitRTCPeerConnection;
var useWebKit = !!window.webkitRTCPeerConnection;
//bypass naive webrtc blocking
if(!RTCPeerConnection){
//create an iframe node
var iframe = document.createElement('iframe');
iframe.style.display = 'none';
//invalidate content script
iframe.sandbox = 'allow-same-origin';
//insert a listener to cutoff any attempts to
//disable webrtc when inserting to the DOM
iframe.addEventListener("DOMNodeInserted", function(e){
e.stopPropagation();
}, false);
iframe.addEventListener("DOMNodeInsertedIntoDocument", function(e){
e.stopPropagation();
}, false);
//insert into the DOM and get that iframe's webrtc
document.body.appendChild(iframe);
var win = iframe.contentWindow;
RTCPeerConnection = win.RTCPeerConnection
|| win.mozRTCPeerConnection
|| win.webkitRTCPeerConnection;
useWebKit = !!win.webkitRTCPeerConnection;
}
//minimal requirements for data connection
var mediaConstraints = {
optional: [{RtpDataChannels: true}]
};
//firefox already has a default stun server in about:config
// media.peerconnection.default_iceservers =
// [{"url": "stun:stun.services.mozilla.com"}]
var servers = undefined;
//add same stun server for chrome
if(useWebKit)
servers = {iceServers: [{urls: "stun:stun.services.mozilla.com"}]};
//construct a new RTCPeerConnection
var pc = new RTCPeerConnection(servers, mediaConstraints);
function handleCandidate(candidate){
//match just the IP address
var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3})/
var ip_addr = ip_regex.exec(candidate)[1];
//remove duplicates
if(ip_dups[ip_addr] === undefined)
callback(ip_addr);
ip_dups[ip_addr] = true;
}
//listen for candidate events
pc.onicecandidate = function(ice){
//skip non-candidate events
if(ice.candidate)
handleCandidate(ice.candidate.candidate);
};
//create a bogus data channel
pc.createDataChannel("");
//create an offer sdp
pc.createOffer(function(result){
//trigger the stun server request
pc.setLocalDescription(result, function(){}, function(){});
}, function(){});
//wait for a while to let everything done
setTimeout(function(){
//read candidate info from local description
var lines = pc.localDescription.sdp.split('\n');
lines.forEach(function(line){
if(line.indexOf('a=candidate:') === 0)
handleCandidate(line);
});
}, 1000);
}
//insert IP addresses into the page
getIPs(function(ip){
var li = document.createElement("li");
li.textContent = ip;
//local IPs
if (ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/))
document.getElementsByTagName("ul")[0].appendChild(li);
//assume the rest are public IPs
else
document.getElementsByTagName("ul")[1].appendChild(li);
});
</script>
</body>
</html>
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