Use java to check network connection status

Use java to check network connection status

In windows, you can use the ping command in cmd to check the network connection status, as shown below:

When the network connection is normal:

When the network is not connected:

In java, you can call the ping command to determine whether the network connection is normal:

Package module. system. common; import java. io. bufferedReader; import java. io. IOException; import java. io. inputStream; import java. io. inputStreamReader;/*** determines the network connection status. * @ author nagsh **/public class NetState {public boolean isConnect () {boolean connect = false; Runtime runtime = Runtime. getRuntime (); Process process; try {process = runtime.exe c ("ping" + "www.baidu.com"); InputStream is = process. getindium UtStream (); InputStreamReader isr = new InputStreamReader (is); BufferedReader br = new BufferedReader (isr); String line = null; StringBuffer sb = new StringBuffer (); while (line = br. readLine ())! = Null) {sb. append (line);} System. out. println ("Return Value:" + sb); is. close (); isr. close (); br. close (); if (null! = Sb &&! Sb. toString (). equals ("") {String logString = ""; if (sb. toString (). indexOf ("TTL")> 0) {// connect = true;} else {// connect = false;} catch (IOException e) {e. printStackTrace ();} return connect;} public static void main (String [] args) {NetState netState = new NetState (); System. out. println (netState. isConnect ());}}