java获取当前请求的ip

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我是靠谱客的博主勤劳豆芽，这篇文章主要介绍java获取当前请求的ip，现在分享给大家，希望可以做个参考。

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public String getIP(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if (null == ip || 0 == ip.length() || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (null == ip || 0 == ip.length() || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (null == ip || 0 == ip.length() || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("X-Real-IP");
}
if (null == ip || 0 == ip.length() || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}