java检测本机网络连接状态

忘是亡心i 2023-10-18 11:13 50阅读 0赞

方法一：使用IO流打开百度连接如果能打开说明网络连接正常，如果抛出异常则网络连接失败

import java.io.IOException;
    import java.io.InputStream;
    import java.net.MalformedURLException;
    import java.net.URL;
    
    public class TestIntent {
       public static void main(String[] args) {  
            URL url = null;  
            try {  
                url = new URL("http://baidu.com");  
                try {  
                    InputStream in = url.openStream();  
                    in.close();  
                    System.out.println("网络连接正常！");  
                } catch (IOException e) {  
                    System.out.println("网络连接失败！");  
                }  
            } catch (MalformedURLException e) {  
                e.printStackTrace();  
            }  
        }  
    }

方法二：

package com.biyunkeji.utils;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.text.DateFormat;
    import java.util.Date;
    
    public class IntentAvailableUtil {
        /**记录连接次数**/
    	private static int count = 0;
    	/**URL**/
    	private static URL urlStr = null;
    	/**连接响应码**/
    	private static int stateCode = 0;
    	/**记录网络断开时间**/
    	private static String closeTime = null;
    	/**HttpURLCOnnection对象**/
    	private static HttpURLConnection connection = null;
    
    /***
    * 功能描述：检测当前的网络是否断开或当前地址是否可连接
    *  如果网络没有断开，最多连接网络5次，如果5次连接不成功说明该地址不存在或
    *   视为无效地址。
    * @param url
    */
    public synchronized static boolean connState(String url) {
      while(count < 5){
    	try {
    		urlStr = new URL(url);
    		connection = (HttpURLConnection) urlStr.openConnection();
    		stateCode = connection.getResponseCode();
    		if(stateCode == 200){
    		return true;
    	}
    	} catch (Exception e) {
    	 if(closeTime == null){
    		DateFormat df = DateFormat.getDateTimeInstance();
    		closeTime = df.format(new Date());
    		System.out.println("网络连接已断开,请检查网络连接设备");
    		System.out.println("断开时间:"+closeTime);
    		System.out.println("程序开始没10秒检查一次");
    	}
    	try {
    		System.out.println("开始第"+ ++count +"次检查网络连接状态");
    		Thread.sleep(10000);
    	} catch (InterruptedException e1) {
    	}
    	}
    
    }
    
    return false;
    
    }
    }
    }

原文：[https://blog.csdn.net/qlxiaomage/article/details/46523177][https_blog.csdn.net_qlxiaomage_article_details_46523177]

[https_blog.csdn.net_qlxiaomage_article_details_46523177]: https://blog.csdn.net/qlxiaomage/article/details/46523177