import .HttpURLConnection;
import .URL;
import org.apache.log4j.Logger;
/**
*
*
* 文件名称为：URLAvailability.java
*
* 文件功能简述： 描述一个URL或图片地址是否有效
*
*
*
*
* */
@SuppressWarnings("unused")
public class URLAvailability {
private static Logger logger = Logger.getLogger(URLAvailability.class);
private static URL urlStr;
private static HttpURLConnection connection;
private static int state = -1;
private static String succ;
/**
* 功能描述 : 检测当前URL是否可连接或是否有效,
* 最多连接网络 5 次, 如果 5 次都不成功说明该地址不存在或视为无效地址.
*
* @param url
* 指定URL网络地址
*
* @return String
*/
private synchronized String isConnect(String url) {
int counts = 0;
succ = null; if (url == null || url.length() <= 0) { return succ; }
while (counts < 5) {
try {
urlStr = new URL(this.getUrl());
connection = (HttpURLConnection) urlStr.openConnection();
state = connection.getResponseCode();
if (state == 200) {
succ = connection.getURL().toString();
}
break;
} catch (Exception ex) {
counts++; logger.info("loop :" + counts);
continue;
}
}
return succ;
}
}
8月12日 10:41
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