获取IP地址Java代码

原创于 2014-11-21 14:12:27 发布 · 140 阅读

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本文介绍了一种在Java中从HttpServletRequest获取客户端真实IP地址的方法。该方法依次尝试使用x-forwarded-for、Proxy-Client-IP、WL-Proxy-Client-IP头部信息来获取IP，如果这些都不可用，则直接使用request.getRemoteAddr()来获取客户端IP。

//获取IP
	private String getIpAddr(HttpServletRequest request) {
       String ip = request.getHeader("x-forwarded-for");
       if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("Proxy-Client-IP");
       }
       if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getHeader("WL-Proxy-Client-IP");
       }
       if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
           ip = request.getRemoteAddr();
       }
       return ip;
   }