Java获取服务器IP及端口的方法实例分析

HttpServletRequest requet=ServletActionContext.getRequest();
requet.getScheme()+"://"+requet.getServerName()+":"+requet.getServerPort()

request.getHeader("User-Agent");  //就是取得客户端的系统版本
request.getRemoteAddr();  //取得客户端的IP
request.getRemoteHost()   //取得客户端的主机名
request.getRemotePort();  //取得客户端的端口
request.getRemoteUser();  //取得客户端的用户
request.getLocalAddr();  //取得服务器IP
request.getLocalPort();  //取得服务器端口

javax.servlet.http.HttpSession.getServletContext()
javax.servlet.jsp.PageContext.getServletContext()
javax.servlet.ServletConfig.getServletContext()

InetAddress.getLocalHost().getHostAddress()

Enumeration<NetworkInterface> netInterfaces = null;
try {
  netInterfaces = NetworkInterface.getNetworkInterfaces();
  while (netInterfaces.hasMoreElements()) {
    NetworkInterface ni = netInterfaces.nextElement();
    System.out.println("DisplayName:" + ni.getDisplayName());
    System.out.println("Name:" + ni.getName());
    Enumeration<InetAddress> ips = ni.getInetAddresses();
    while (ips.hasMoreElements()) {
      System.out.println("IP:"
      + ips.nextElement().getHostAddress());
    }
  }
} catch (Exception e) {
  e.printStackTrace();
}
Enumeration<NetworkInterface> netInterfaces = null;
try {
    netInterfaces = NetworkInterface.getNetworkInterfaces();
    while (netInterfaces.hasMoreElements()) {
        NetworkInterface ni = netInterfaces.nextElement();
        System.out.println("DisplayName:" + ni.getDisplayName());
        System.out.println("Name:" + ni.getName());
        Enumeration<InetAddress> ips = ni.getInetAddresses();
        while (ips.hasMoreElements()) {
            System.out.println("IP:"
            + ips.nextElement().getHostAddress());
        }
    }
} catch (Exception e) {
    e.printStackTrace();
}