Android tool class -------) Http request tool class

Android tool class -------) Http request tool class

Import java. io. bufferedReader; import java. io. byteArrayOutputStream; import java. io. IOException; import java. io. inputStream; import java. io. inputStreamReader; import java. io. printWriter; import java.net. httpURLConnection; import java.net. URL; // public class HttpUtils {private static final int TIMEOUT_IN_MILLIONS = 5000; public interface CallBack {void onRequestComplete (String result);}/*** asynchronous Get request ** @ Param urlStr * @ param callBack */public static void doGetAsyn (final String urlStr, final CallBack callBack) {new Thread () {public void run () {try {String result = doGet (urlStr); if (callBack! = Null) {callBack. onRequestComplete (result) ;}} catch (Exception e) {e. printStackTrace ();}};}. start ();}/*** asynchronous Post Request * @ param urlStr * @ param params * @ param callBack * @ throws Exception */public static void doPostAsyn (final String urlStr, final String params, final CallBack callBack) throws Exception {new Thread () {public void run () {try {String result = doPost (urlStr, params); if (callBack! = Null) {callBack. onRequestComplete (result) ;}} catch (Exception e) {e. printStackTrace ();}};}. start ();}/*** Get request to obtain returned data ** @ param urlStr * @ return * @ throws Exception */public static String doGet (String urlStr) {URL url = null; HttpURLConnection conn = null; InputStream is = null; ByteArrayOutputStream baos = null; try {url = new URL (urlStr); conn = (HttpURLConnection) url. openConnection (); conn. setReadTi Meout (TIMEOUT_IN_MILLIONS); conn. setConnectTimeout (TIMEOUT_IN_MILLIONS); conn. setRequestMethod ("GET"); conn. setRequestProperty ("accept", "*/*"); conn. setRequestProperty ("connection", "Keep-Alive"); if (conn. getResponseCode () = 200) {is = conn. getInputStream (); baos = new ByteArrayOutputStream (); int len =-1; byte [] buf = new byte [128]; while (len = is. read (buf ))! =-1) {baos. write (buf, 0, len);} baos. flush (); return baos. toString ();} else {throw new RuntimeException ("responseCode is not 200... ") ;}} catch (Exception e) {e. printStackTrace ();} finally {try {if (is! = Null) is. close ();} catch (IOException e) {}try {if (baos! = Null) baos. close ();} catch (IOException e) {} conn. disconnect ();} return null;}/*** send a POST method request to a specified URL ** @ param url * The request URL * @ param * request parameter, the request parameters should be in the form of name1 = value1 & name2 = value2. * @ Return indicates the response result of the Remote resource * @ throws Exception */public static String doPost (String url, String param) {PrintWriter out = null; BufferedReader in = null; string result = ""; try {URL realUrl = new URL (url); // open the connection with the URL HttpURLConnection conn = (HttpURLConnection) realUrl. openConnection (); // set the common request attribute conn. setRequestProperty ("accept", "*/*"); conn. setRequestProperty ("connection", "Keep-Alive"); conn. setReque StMethod ("POST"); conn. setRequestProperty ("Content-Type", "application/x-www-form-urlencoded"); conn. setRequestProperty ("charset", "UTF-8"); conn. setUseCaches (false); // The following two rows of conn must be set to send a POST request. setDoOutput (true); conn. setDoInput (true); conn. setReadTimeout (TIMEOUT_IN_MILLIONS); conn. setConnectTimeout (TIMEOUT_IN_MILLIONS); if (param! = Null &&! Param. trim (). equals ("") {// get the output stream of the URLConnection object out = new PrintWriter (conn. getOutputStream (); // sends the request parameter out. print (param); // flush the Buffer out of the output stream. flush ();} // defines the BufferedReader input stream to read the URL response in = new BufferedReader (new InputStreamReader (conn. getInputStream (); String line; while (line = in. readLine ())! = Null) {result + = line;} catch (Exception e) {e. printStackTrace () ;}// use finally blocks to close the output stream and input stream finally {try {if (out! = Null) {out. close () ;}if (in! = Null) {in. close () ;}catch (IOException ex) {ex. printStackTrace () ;}} return result ;}}