获取各种IP地址

最近做项目，犯了一个低级的错误，把获取客户端Ip当成获取本机IP了，被训的很厉害了，哎，是啊，怪自己太笨了，活该啊。

java 获取客户端真实IP地址的方法：

public 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;
   } 

　java获取本机的IP和主机名

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Properties;
import java.util.Set;  

public class TestSystemProperties {  

    public static void main(String [] args){
        InetAddress netAddress = getInetAddress();
        System.out.println("host ip:" + getHostIp(netAddress));
        System.out.println("host name:" + getHostName(netAddress));
        Properties properties = System.getProperties();
        Set<String> set = properties.stringPropertyNames(); //获取java虚拟机和系统的信息。
        for(String name : set){
            System.out.println(name + ":" + properties.getProperty(name));
        }
    }  

    public static InetAddress getInetAddress(){  

        try{
            return InetAddress.getLocalHost();
        }catch(UnknownHostException e){
            System.out.println("unknown host!");
        }
        return null;  

    }  

    public static String getHostIp(InetAddress netAddress){
        if(null == netAddress){
            return null;
        }
        String ip = netAddress.getHostAddress(); //get the ip address
        return ip;
    }  

    public static String getHostName(InetAddress netAddress){
        if(null == netAddress){
            return null;
        }
        String name = netAddress.getHostName(); //get the host address
        return name;
    }  

}  

获取各种IP地址