HttpUrlClient

public class HttpUrlClient {private static final int CONNECTION_TIMEOUT = 20000;private static final String CHARCODE="UTF-8"; public HttpUrlClient() {}/** * Using GET method. *  * @param url *            The remote URL. * @param queryString *            The query string containing parameters * @return Response string. * @throws Exception */public static String httpGet(String url, String queryString) throws Exception {String responseData = null;if (queryString != null && !queryString.equals("")) {url += "?" + queryString;}HttpClient httpClient = new HttpClient();GetMethod httpGet = new GetMethod(url);httpGet.getParams().setParameter("http.socket.timeout",new Integer(CONNECTION_TIMEOUT));try {int statusCode = httpClient.executeMethod(httpGet);if (statusCode != HttpStatus.SC_OK) {System.err.println("HttpGet Method failed: "+ httpGet.getStatusLine());}// Read the response body.responseData = httpGet.getResponseBodyAsString();} catch (Exception e) {throw new Exception(e);} finally {httpGet.releaseConnection();httpClient = null;}return responseData;}/** * Using POST method. *  * @param url *            The remote URL. * @param queryString *            The query string containing parameters * @return Response string. * @throws Exception */public static String httpPost(String url, String queryString) throws Exception {String responseData = null;HttpClient httpClient = new HttpClient();PostMethod httpPost = new PostMethod(url);httpPost.addParameter("Content-Type","application/x-www-form-urlencoded");httpPost.getParams().setParameter("http.socket.timeout",new Integer(CONNECTION_TIMEOUT));if (queryString != null && !queryString.equals("")) {//httpPost.setRequestEntity(new ByteArrayRequestEntity(queryString.getBytes()));httpPost.setRequestEntity(new ByteArrayRequestEntity(queryString.getBytes("UTF-8")));}try {int statusCode = httpClient.executeMethod(httpPost);if (statusCode != HttpStatus.SC_OK) {System.err.println("HttpPost Method failed: "+ httpPost.getStatusLine());}responseData = httpPost.getResponseBodyAsString();} catch (Exception e) {throw new Exception(e);} finally {httpPost.releaseConnection();httpClient = null;}return responseData;}public static String doPost(String reqUrl, Map<String, String> parameters,String charset) {HttpURLConnection urlConn = null;try {urlConn = sendPost(reqUrl, parameters);String responseContent = getContent(urlConn,charset);return responseContent.trim();}catch(Exception e){return null;}finally {if (urlConn != null) {urlConn.disconnect();urlConn = null;}}}public static String doPost(String reqUrl, Map<String, String> parameters) {return doPost(reqUrl,parameters,CHARCODE);}public static String doGet(String reqUrl, Map<String, String> parameters,String charset) {HttpURLConnection urlConn = null;try {urlConn = sendGet(reqUrl, parameters);String responseContent = getContent(urlConn,charset);return responseContent.trim();}catch(Exception e){return null;}finally {if (urlConn != null) {urlConn.disconnect();urlConn = null;}}}public static String doGet(String reqUrl, Map<String, String> parameters) {return doGet(reqUrl,parameters,CHARCODE);}private static String getContent(HttpURLConnection urlConn,String charset) {int code;try {code = urlConn.getResponseCode();String responseContent = null;InputStream in = null;if (code == HttpURLConnection.HTTP_OK) {in = urlConn.getInputStream();}else{in = urlConn.getErrorStream(); }BufferedReader rd = new BufferedReader(new InputStreamReader(in,charset));String tempLine = rd.readLine();StringBuffer tempStr = new StringBuffer();String crlf = System.getProperty("line.separator");while (tempLine != null) {tempStr.append(tempLine);tempStr.append(crlf);tempLine = rd.readLine();}responseContent = tempStr.toString();rd.close();in.close();return responseContent;} catch (Exception e) {throw new RuntimeException(e.getMessage(), e);}}private static HttpURLConnection sendPost(String reqUrl,Map<String, String> parameters) {HttpURLConnection urlConn = null;try {String params = generatorParamString(parameters);URL url = new URL(reqUrl);urlConn = (HttpURLConnection) url.openConnection();urlConn.setRequestMethod("POST");//urlConn.setConnectTimeout(50000);//urlConn.setReadTimeout(50000);urlConn.setDoOutput(true);byte[] b = params.getBytes();urlConn.getOutputStream().write(b, 0, b.length);urlConn.getOutputStream().flush();urlConn.getOutputStream().close();} catch (Exception e) {throw new RuntimeException(e.getMessage(), e);}return urlConn;}private static HttpURLConnection sendGet(String reqUrl,Map<String, String> parameters) {HttpURLConnection urlConn = null;String urlStr=reqUrl+"?"+generatorParamString(parameters);try {URL url = new URL(urlStr);urlConn = (HttpURLConnection) url.openConnection();urlConn.setRequestMethod("GET");urlConn.setConnectTimeout(50000);urlConn.setReadTimeout(50000);urlConn.setDoInput(true); urlConn.setDoOutput(true);} catch (Exception e) {throw new RuntimeException(e.getMessage(), e);}return urlConn;}public static String generatorParamString(Map<String, String> parameters) {StringBuffer params = new StringBuffer();if (parameters != null) {for (Iterator<String> iter = parameters.keySet().iterator(); iter.hasNext();) {String name = iter.next();String value = parameters.get(name);params.append(name + "=");try {params.append(URLEncoder.encode(value, CHARCODE));} catch (UnsupportedEncodingException e) {throw new RuntimeException(e.getMessage(), e);} catch (Exception e) {String message = String.format("'%s'='%s'", name, value);throw new RuntimeException(message, e);}if (iter.hasNext()) {params.append("&");}}}return params.toString();}public static void main(String[] args){Map<String, String> map = new HashMap<String, String>();map.put("id", "");map.put("type", "");map.put("msgType", "");HttpUrlClient.doPost("", map, "utf-8");}}