一、
/**
* 判断链接是否有效
* 输入链接
* 返回true或者false
*/
public static boolean isValid(String strLink) {
URL url;
try {
url = new URL(strLink);
HttpURLConnection connt = (HttpURLConnection)url.openConnection();
connt.setRequestMethod(“HEAD”);
String strMessage = connt.getResponseMessage();
if (strMessage.compareTo(“Not Found”) == 0) {
return false;
}
connt.disconnect();
} catch (Exception e) {
return false;
}
return true;
}
二、
package test;
import java.net.*;
public class riqi {
public static void main(String[] args) {
try {
URL url=new URL( “http://www.aaa.com”);
URLConnection conn=url.openConnection();
String str=conn.getHeaderField(0);
if (str.indexOf( “OK “)> 0)
{
System.out.println( “正常! “);
}else{
System.out.println( “不能游览”);
}
} catch (Exception ex) {
}
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