Java-检测域/服务器IP是否可用

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
 
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
 
public class NetStateUtil {
    static HostnameVerifier hv = new HostnameVerifier() {  
        public boolean verify(String urlHostName, SSLSession session) {  
            return true;  
        }  
    };  
    public String connectingAddress(String remoteInetAddr){
        boolean flag=false;
        String tempUrl=remoteInetAddr.substring(0, 5);//取出地址前5位
        if(tempUrl.contains("http")){//判断传过来的地址中是否有http
            if(tempUrl.equals("https")){//判断服务器是否是https协议
                try {
                    trustAllHttpsCertificates();//当协议是https时
                } catch (Exception e) {
                    e.printStackTrace();
                }  
                HttpsURLConnection.setDefaultHostnameVerifier(hv);//当协议是https时
            }
            flag=isConnServerByHttp(remoteInetAddr);
        }else{//传过来的是IP地址
            flag=isReachable(remoteInetAddr);
        }
        if(flag){
            return "正常";
        }else{
            return "异常";
        }
    }
    /**
     * 传入需要连接的IP，返回是否连接成功
     *
     * @param remoteInetAddr
     * @return
     */
    public static boolean isReachable(String remoteInetAddr) {// IP地址是否可达，相当于Ping命令
        boolean reachable = false;
        try {
            InetAddress address = InetAddress.getByName(remoteInetAddr);
            reachable = address.isReachable(1500);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return reachable;
    }
 
    public static boolean isConnServerByHttp(String serverUrl) {// 服务器是否开启
        boolean connFlag = false;
        URL url;
        HttpURLConnection conn = null;
        try {
            url = new URL(serverUrl);
            conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(3 * 1000);
            if (conn.getResponseCode() == 200) {// 如果连接成功则设置为true
                connFlag = true;
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            conn.disconnect();
        }
        return connFlag;
    }
    /*以下是Https适用*/
    private static void trustAllHttpsCertificates() throws Exception {  
        javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];  
        javax.net.ssl.TrustManager tm = new miTM();  
        trustAllCerts[0] = tm;  
        javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext  
                .getInstance("SSL");  
        sc.init(null, trustAllCerts, null);  
        javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc  
                .getSocketFactory());  
    }  
 
    static class miTM implements javax.net.ssl.TrustManager,  
            javax.net.ssl.X509TrustManager {  
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
            return null;  
        }  
 
        public boolean isServerTrusted(  
                java.security.cert.X509Certificate[] certs) {  
            return true;  
        }  
 
        public boolean isClientTrusted(  
                java.security.cert.X509Certificate[] certs) {  
            return true;  
        }  
 
        public void checkServerTrusted(  
                java.security.cert.X509Certificate[] certs, String authType)  
                throws java.security.cert.CertificateException {  
            return;  
        }  
 
        public void checkClientTrusted(  
                java.security.cert.X509Certificate[] certs, String authType)  
                throws java.security.cert.CertificateException {  
            return;  
        }  
    }  
    /*以上是Https适用*/
}

最后

以上就是潇洒溪流为你收集整理的Java-检测域/服务器IP是否可用的全部内容，希望文章能够帮你解决Java-检测域/服务器IP是否可用所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。