public class HttpHelper {
String m_url;
HttpClient m_HttpClient;
public HttpHelper(String url) {
m_url = url;
m_HttpClient = new HttpClient();
}
public byte[] post(byte[] bytes, String contentType) throws IOException {
PostMethod method = new PostMethod(m_url);
if ((contentType != null) && (contentType.length() > 0)) method.setRequestHeader("Content-type" , contentType);
method.setRequestEntity(new ByteArrayRequestEntity(bytes));
int HttpCode = m_HttpClient.executeMethod(method);
if (HttpCode != HttpStatus.SC_OK) throw new IOException("Invalid HttpStatus: " + HttpCode);
InputStream respStream = method.getResponseBodyAsStream();
int respBodySize = respStream.available();
if (respBodySize <= 0) throw new IOException("Invalid respBodySize: " + respBodySize);
byte[] respBuffer = new byte[respBodySize];
if (respStream.read(respBuffer) != respBodySize) throw new IOException("Read respBody Error");
return respBuffer;
}
public String postXml(String str) throws IOException {
byte[] reqBuffer = str.getBytes(Charset.forName("UTF-8"));
byte[] respBuffer = post(reqBuffer, "application/xml;
charset=UTF-8");
String resp = new String(respBuffer, Charset.forName("UTF-8"));
return resp;
}
}

public class HttpHelper {
CloseableHttpClient m_HttpClient;
public HttpHelper() {
m_HttpClient = HttpClients.createDefault();
}
// send bytes and recv bytes public byte[] post(String url, byte[] bytes, String contentType) throws IOException {
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new ByteArrayEntity(bytes));
if (contentType != null) httpPost.setHeader("Content-type", contentType);
CloseableHttpResponse httpResponse = m_HttpClient.execute(httpPost);
try {
HttpEntity entityResponse = httpResponse.getEntity();
int contentLength = (int) entityResponse.getContentLength();
if (contentLength <= 0) throw new IOException("No response");
byte[] respBuffer = new byte[contentLength];
if (entityResponse.getContent().read(respBuffer) != respBuffer.length) throw new IOException("Read response buffer error");
return respBuffer;
}
finally {
httpResponse.close();
}
}
public byte[] post(String url, byte[] bytes) throws IOException {
return post(url, bytes, null);
}
public String postXml(String url, String str) throws IOException {
byte[] reqBuffer = str.getBytes(Charset.forName("UTF-8"));
byte[] respBuffer = post(url, reqBuffer, "application/xml;
charset=UTF-8");
String resp = new String(respBuffer, Charset.forName("UTF-8"));
return resp;
}
}