java如何获取发起请求的用户真实IP
/**
* 获取用户实际IP地址
* @param request 当前请求对象
* @return 实际IP地址
*/
public static String getRemoteIp(HttpServletRequest request) {
String ip = request.getHeader('X-Forwarded-For');
logger.trace('当前IP来源[X-Forwarded-For], 值[{}]', ip);
if(!StringUtils.isEmpty(ip) && !NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)){
//多次反向代理后会有多个ip值,第一个ip才是真实ip
int index = ip.indexOf(',');
if(index != -1){
return ip.substring(0, index);
}else{
return ip;
}
}
ip = request.getHeader('X-Real-IP');
logger.trace('当前IP来源[X-Real-IP], 值[{}]', ip);
if(!StringUtils.isEmpty(ip) && !NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)){
return ip;
}
if (StringUtils.isEmpty(ip) || NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader('Proxy-Client-IP');
logger.trace('当前IP来源[Proxy-Client-IP], 值[{}]', ip);
}
if (StringUtils.isEmpty(ip) || NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader('WL-Proxy-Client-IP');
logger.trace('当前IP来源[WL-Proxy-Client-IP], 值[{}]', ip);
}
if (StringUtils.isEmpty(ip) || NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader('HTTP_CLIENT_IP');
logger.trace('当前IP来源[HTTP_CLIENT_IP], 值[{}]', ip);
}
if (StringUtils.isEmpty(ip) || NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader('HTTP_X_FORWARDED_FOR');
logger.trace('当前IP来源[HTTP_X_FORWARDED_FOR], 值[{}]', ip);
}
if (StringUtils.isEmpty(ip) || NoticeConstant.UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
logger.trace('当前IP来源[getRemoteAddr], 值[{}]', ip);
}
if ('0:0:0:0:0:0:0:1'.equals(ip)) {
String ipv4FromLocal = getIpv4FromLocal();
if (StringUtils.isNotEmpty(ipv4FromLocal)) {
ip = ipv4FromLocal;
}
}
return ip;
}
/**
* 获取本地IP地址
* @return IP地址
*/
private static String getIpv4FromLocal() {
String ip = null;
InputStream is = null;
InputStreamReader isr = null;
BufferedReader br = null;
try {
Process process = Runtime.getRuntime().exec('cmd.exe /c ipconfig | findstr IPv4');
is = process.getInputStream();
isr = new InputStreamReader(is);
br = new BufferedReader(isr);
String line = br.readLine();
ip = line.substring(line.indexOf(':') + 1).trim();
} catch (IOException e) {
logger.warn('获取本地IP异常', e);
} finally {
try {
if (br != null) {
br.close();
}
if (isr != null) {
isr.close();
}
if (is != null) {
is.close();
}
} catch (IOException e) {
logger.debug('流关闭异常', e);
}
}
return ip;
}
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