java查看网络是否通

思路：利用runtime调用 ping命令。

package test.network;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

public class TestNetworkConnection {
	
	
	public static void main(String[] args) {
		new TestNetworkConnection().start();
	}
	
	public void start(){
		
		Runtime runtime=Runtime.getRuntime();
		
		try {
			Process process=runtime.exec("ping "+"10.4.46.194");
			InputStream is=process.getInputStream();
			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("返回值为:"+line);
			}
			is.close();
			isr.close();
			br.close();
			
			if(null != sb && !sb.toString().equals("")){
				if(sb.toString().indexOf("TTL")>0){
					System.out.println("网络通畅");
				}else{
					System.out.println("网络有问题");
				}
			}
			
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		
		
	}

}

 

refurl:http://www.itpub.net/thread-340898-1-1.html