java根据ip判断网络连接情况（i除Java执行ping命令和InetAddress这两种方式）

  因为ava执行ping命令和InetAddress这两种方式执行速度太慢了，有没有更好的解决方法？？？  

获得客户端真实IP地址的方法一：
public String getRemortIP(HttpServletRequest request) {
if (request.getHeader("x-forwarded-for") == null) {
return request.getRemoteAddr();
}
return request.getHeader("x-forwarded-for");
} 　　
获得客户端真实IP地址的方法二：
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;
}

ip一般都是路由等网络设备分配的，有ip不代表就一定能访问公网吧，还不如直接访问百度一下试试网络通不通呢，呵呵，直接获取http头就行了

opennms有个 jicmp组件，你可以试一下