Java Utililty Methods URL Exist

List of utility methods to do URL Exist

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Description

The list of methods to do URL Exist are organized into topic(s).

Method

booleanexists(String fileorUrl)
exists 
if (isUrl(fileorUrl)) {
    if (fileorUrl.startsWith("http")) {
        return existsHttp(fileorUrl);
    } else {
        try {
            URL url = new URL(fileorUrl);
            try {
                URLConnection uc = url.openConnection();
...
booleanexists(String url)
exists 
try {
    return exists(new URL(url));
} catch (Exception e) {
    return false;
booleanexists(URL url)
exists 
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.setRequestMethod("HEAD");
huc.connect();
return (huc.getResponseCode() == HttpURLConnection.HTTP_OK);
booleanexists(URL url)
exists 
if ("http".equals(url.getProtocol())) {
    HttpURLConnection cnx = (HttpURLConnection) url.openConnection();
    return (HttpURLConnection.HTTP_OK == cnx.getResponseCode());
} else if ("file".equals(url.getProtocol())) {
    File f = new File(url.getPath());
    return f.exists();
throw new UnsupportedOperationException("only 'http' and 'file' protocol supported :" + url.getProtocol());
...
booleanexists(URL url)
exists 
try {
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("HEAD");
    return connection.getResponseCode() == HttpURLConnection.HTTP_OK;
} catch (IOException e) {
    return false;
booleanexistsHttp(String URLName)
exists Http 
try {
    HttpURLConnection.setFollowRedirects(false);
    HttpURLConnection con = (HttpURLConnection) new URL(URLName).openConnection();
    con.setRequestMethod("HEAD");
    con.setConnectTimeout(10000);
    int code = con.getResponseCode();
    boolean ex = (code == HttpURLConnection.HTTP_OK);
    p("Exists url " + URLName + ", code: " + code + "= " + ex);
...
booleanexistsURL(String url)
Check if the specified URL exists. 
try {
    HttpURLConnection.setFollowRedirects(true);
    HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
    connection.setRequestMethod("HEAD");
    return (connection.getResponseCode() == HttpURLConnection.HTTP_OK
            || connection.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT);
} catch (Exception e) {
    System.out.println("Error accessing: " + url);
...
booleanexistsURL_bak(String url)
Check if the specified URL exists. 
HttpURLConnection.setFollowRedirects(false);
HttpURLConnection conn = null;
boolean SUCCESS = false;
try {
    conn = (HttpURLConnection) new URL(url).openConnection();
    conn.connect();
    DataInputStream ins = new DataInputStream(new BufferedInputStream(conn.getInputStream()));
    ins.close();
...