Java Utililty Methods URL Value Check

List of utility methods to do URL Value Check

  1. HOME
  2. Java
  3. U
  4. URL Value Check

Description

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

Method

StringinvokePostUrl(String url, String encodedQueryString)
invoke Post Url 
String agent = "Mozilla/4.0";
HttpURLConnection conn = null;
DataOutputStream output = null;
DataInputStream in = null;
BufferedReader is = null;
try {
    URL postURL = new URL(url);
    conn = (HttpURLConnection) postURL.openConnection();
...
StringinvokeUrl(String url)
This is a generic method to invoke the REST API. 
if (url == null) {
    throw new IllegalArgumentException("Null parameter passed in");
URL urlObj;
InputStream inStream = null;
String response = null;
HttpURLConnection connection = null;
try {
...
booleanis200(final String url)
is 
HttpURLConnection con = null;
try {
    con = (HttpURLConnection) new URL(url).openConnection();
    return (con.getResponseCode() == 200);
} catch (Exception e) {
    return false;
} finally {
    if (con != null) {
...
booleanis404(URL url)
is 
URLConnection connection;
InputStream urlIn = null;
try {
    connection = url.openConnection();
    if (connection instanceof HttpURLConnection) {
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        return httpConnection.getResponseCode() >= 400;
    urlIn = connection.getInputStream();
    urlIn.read();
} catch (IOException ex) {
    return true;
} finally {
    try {
        if (urlIn != null) {
            urlIn.close();
    } catch (IOException e) {
return false;
booleanisAddressReachable(String url, int timeout)
is Address Reachable 
try {
    URL test = new URL(url);
    HttpURLConnection.setFollowRedirects(false);
    HttpURLConnection urlConnect = (HttpURLConnection) test.openConnection();
    System.setProperty("http.agent", "");
    urlConnect.setRequestProperty("User-Agent",
            "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.100 Safari/534.30");
    urlConnect.setRequestMethod("HEAD");
...
booleanisAValidURL(String url)
is A Valid URL 
URL u = null;
HttpURLConnection huc = null;
try {
    u = new URL(url);
    huc = (HttpURLConnection) u.openConnection();
    huc.setRequestMethod("HEAD");
    huc.connect();
    return (huc.getResponseCode() == HttpURLConnection.HTTP_OK);
...
booleanisCompressed(HttpURLConnection connection)
is Compressed 
for (Map.Entry<String, List<String>> entry : connection.getHeaderFields().entrySet()) {
    if ("Content-Encoding".equalsIgnoreCase(entry.getKey())) {
        return "gzip".equalsIgnoreCase(entry.getValue().get(0));
return false;
booleanisEMailAddress(URL url)
is E Mail Address 
boolean result = true;
String urlString = url.toString();
if (url.getHost() != null && !url.getHost().trim().equals("")) {
    result = false;
if (url.getPort() != -1) {
    result = false;
int pos = urlString.indexOf('@');
if (pos == -1) {
    result = false;
} else {
    if (urlString.indexOf('@', pos + 1) != -1) {
        return false;
if (pos > (urlString.length() - 6)) {
    result = false;
return result;
booleanisFile(final URL url)
Indicates whether or not the given url is a file. 
return url != null && new File(url.getFile()).isFile();
booleanisFile(final URL url)
is File 
return url != null && (url.getProtocol().equals(PROTOCOL_FILE) || url.getProtocol().equals(JBOSS_FILE));