53 lines
1.3 KiB
Plaintext
53 lines
1.3 KiB
Plaintext
package com.bonus.core;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import org.apache.log4j.Logger;
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/**
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* 功能简述： 描述一个URL地址是否有效
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* @author lvjilong
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* @time 2018/01/15
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*
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*/
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public class URLAvailability {
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private static Logger logger =Logger.getLogger(URLAvailability.class);
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private static URL url;
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private static HttpURLConnection con;
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private static int state = -1;
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/**
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* 功能：检测当前URL是否可连接或是否有效,
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* 描述：最多连接网络 5 次, 如果 5 次都不成功，视为该地址不可用
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* @param urlStr 指定URL网络地址
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* @return URL
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*/
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public static synchronized boolean isConnect(String urlStr) {
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int counts = 0;
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boolean tf=false;
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if (urlStr == null || urlStr.length() <= 0) {
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tf=false;
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}
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while (counts < 5) {
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try {
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url = new URL(urlStr);
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con = (HttpURLConnection) url.openConnection();
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state = con.getResponseCode();
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if (state == 200) {
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tf=true;
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return tf;
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}
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break;
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}catch (Exception ex) {
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counts++;
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logger.warn("url:"+urlStr+",is not connect!,connect :"+counts+"num");
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urlStr = null;
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tf=false;
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continue;
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}
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}
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return tf;
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}
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}
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