Java获取请求客户端的真实IP地址

import java.net.UnknownHostException;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.handler.MessageContext;

@Resource
private WebServiceContext wsContext;  
/**
* 获取请求来的ips 
* @param request
* @return
*/
public String getIpAddr() {
String ipAddress = null;
MessageContext mc = wsContext.getMessageContext();
HttpServletRequest request = (HttpServletRequest) (mc
		.get(mc.SERVLET_REQUEST));
ipAddress = request.getHeader("x-forwarded-for");
if (ipAddress == null || ipAddress.length() == 0
		|| "unknown".equalsIgnoreCase(ipAddress)) {
	ipAddress = request.getHeader("Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0
		|| "unknown".equalsIgnoreCase(ipAddress)) {
	ipAddress = request.getHeader("WL-Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0
		|| "unknown".equalsIgnoreCase(ipAddress)) {
	ipAddress = request.getRemoteAddr();
		
	//这里主要是获取本机的ip,可有可无
	if (ipAddress.equals("127.0.0.1")
			|| ipAddress.endsWith("0:0:0:0:0:0:1")) {
		// 根据网卡取本机配置的IP
		InetAddress inet = null;
		try {
			inet = InetAddress.getLocalHost();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		ipAddress = inet.getHostAddress();
	}

}

// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
													// = 15
	if (ipAddress.indexOf(",") > 0) {
		ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
	}
}
 //或者这样也行,对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割  
//return ipAddress!=null&&!"".equals(ipAddress)?ipAddress.split(",")[0]:null;       
return ipAddress;
}

 

 

主要转载于(http://www.iteye.com/topic/1124070)