Java Utililty Methods HTTP Post

List of utility methods to do HTTP Post

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Description

The list of methods to do HTTP Post are organized into topic(s).

Method

StringsendPost(String link, String urlParameters)
send Post 
String url = baseUrl + link;
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Authorization", userNamePasswordBase64("api", "api"));
con.setRequestProperty("Content-Type", "application/json;charset=utf-8");
con.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream(), "UTF8");
...
intsendPost(String url, String data)
send Post 
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(data);
wr.flush();
...
StringsendPost(String url, String urlParameters)
send Post 
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", "Mozilla/5.0");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
...
StringsendPost(String webURL, HashMap postOptions)
send Post 
URL obj = new URL(webURL);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", "Mozilla/5.0");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
String urlParameters = "";
for (String s : postOptions.keySet()) {
    urlParameters = urlParameters
...
voidsendPostRequest(Reader data, URL endpoint, Writer output)
Reads data from the data reader and posts it to a server via POST request. 
HttpURLConnection urlConnection = null;
try {
    urlConnection = (HttpURLConnection) endpoint.openConnection();
    try {
        urlConnection.setRequestMethod("POST");
    } catch (ProtocolException e) {
        throw new Exception("Shouldn't happen: HttpURLConnection doesn't support POST??", e);
    urlConnection.setDoOutput(true);
    urlConnection.setDoInput(true);
    urlConnection.setUseCaches(false);
    urlConnection.setAllowUserInteraction(false);
    urlConnection.setRequestProperty("Content-type", "text/xml; charset=" + "UTF-8");
    OutputStream out = urlConnection.getOutputStream();
    try {
        Writer writer = new OutputStreamWriter(out, "UTF-8");
        pipe(data, writer);
        writer.close();
    } catch (IOException e) {
        throw new Exception("IOException while posting data", e);
    } finally {
        if (out != null) {
            out.close();
    InputStream in = urlConnection.getInputStream();
    try {
        Reader reader = new InputStreamReader(in);
        pipe(reader, output);
        reader.close();
    } catch (IOException e) {
        throw new Exception("IOException while reading response", e);
    } finally {
        if (in != null) {
            in.close();
} catch (IOException e) {
    throw new Exception("Connection error (is server running at " + endpoint + " ?): " + e);
} finally {
    if (urlConnection != null) {
        urlConnection.disconnect();
voidsendPostRequest(Reader data, URL endpoint, Writer output)
Reads data from the data reader and posts it to a server via POST request. 
HttpURLConnection urlConnection = null;
try {
    urlConnection = (HttpURLConnection) endpoint.openConnection();
    try {
        urlConnection.setRequestMethod("POST");
    } catch (ProtocolException e) {
        throw new Exception("Shouldn't happen: HttpURLConnection doesn't support POST??", e);
    urlConnection.setDoOutput(true);
    urlConnection.setDoInput(true);
    urlConnection.setUseCaches(false);
    urlConnection.setAllowUserInteraction(false);
    urlConnection.setRequestProperty("Content-type", "text/xml; charset=" + "UTF-8");
    OutputStream out = urlConnection.getOutputStream();
    try {
        Writer writer = new OutputStreamWriter(out, "UTF-8");
        pipe(data, writer);
        writer.close();
    } catch (IOException e) {
        throw new Exception("IOException while posting data: " + e.getMessage(), e);
    } finally {
        if (out != null) {
            out.close();
    InputStream in = urlConnection.getInputStream();
    try {
        Reader reader = new InputStreamReader(in);
        pipe(reader, output);
        reader.close();
    } catch (IOException e) {
        throw new Exception("IOException while reading response: " + e.getMessage(), e);
    } finally {
        if (in != null) {
            in.close();
} catch (IOException e) {
    throw new Exception("Connection error (is server running at " + endpoint + " ?): " + e.getMessage(), e);
} finally {
    if (urlConnection != null) {
        urlConnection.disconnect();
HttpURLConnectionsendPostRequest(String requestURL, Map params)
Makes an HTTP request using POST method to the specified URL. 
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoInput(true); 
StringBuffer requestParams = new StringBuffer();
if (params != null && params.size() > 0) {
    httpConn.setDoOutput(true); 
    Iterator<String> paramIterator = params.keySet().iterator();
...
ListURLPost(String strUrl, Map map)
URL Post 
String content = "";
content = getUrl(map);
String totalURL = null;
if (strUrl.indexOf("?") == -1) {
    totalURL = strUrl + "?" + content;
} else {
    totalURL = strUrl + "&" + content;
URL url = new URL(strUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setAllowUserInteraction(false);
con.setUseCaches(false);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=GBK");
BufferedWriter bout = new BufferedWriter(new OutputStreamWriter(con.getOutputStream()));
bout.write(content);
bout.flush();
bout.close();
BufferedReader bin = new BufferedReader(new InputStreamReader(con.getInputStream()), 1048576);
List result = new ArrayList();
for (;;) {
    String line = bin.readLine();
    if (line == null) {
        break;
    result.add(line);
return result;
voidwriteBody(HttpURLConnection connection, String body)
write Body 
OutputStream stream = connection.getOutputStream();
stream.write(body.getBytes());
stream.flush();
stream.close();
voidwriteContent(HttpURLConnection urlConn, String content)
write Content 
OutputStreamWriter out = new OutputStreamWriter(urlConn.getOutputStream());
out.write(content);
out.close();