Tool classes related to asynchronous networks Httputils

Tool classes related to asynchronous networks

Package Com.flyou.utils;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;/** * HTTP Request Tool Class * * @author flyou * */public class Httputils{private STA Tic Final int timeout_in_millions = 4000;public interface callback{void onrequestcomplete (String result); /** * Asynchronous GET Request * * @param urlstr * @param callBack */public static void Dogetasyn (Final String urlstr, final callBack cal Lback) {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 (FINA L string urlstr, final string params,final CallBack CallBack) throws Exception{new Thread () {public void run () {try{string R Esult =DoPost (urlstr, params); if (callBack! = null) {Callback.onrequestcomplete (result);}} catch (Exception e) {e.printstacktrace ();}};}. Start ();}  /** * GET request, get return 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.setreadtimeout (timeout_in_millions); Conn.setconnecttimeout (timeout_in_millions); Conn.setRequestMethod (" GET "), Conn.setrequestproperty (" Accept "," */* "), Conn.setrequestproperty (" Connection "," keep-alive ");  Conn.getresponsecode () = = () {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;} /** * Request to send a POST method to the specified URL * * @param URL * Send request URL * @param param * Request parameter, request parameter should be Name1=value1&amp ; a form of name2=value2. * @return The response result of the remote resource represented * @throws Exception */public static string doPost (string url, string param) {PrintWriter out = null ; BufferedReader in = null; String result = ""; Try{url realurl = new URL (URL);//connection between Open and URL httpurlconnection conn = (httpurlconnection) realurl.openc Onnection ()///Set Generic request attribute Conn.setrequestproperty ("accept", "*/*") Conn.setrequestproperty ("Connection", " Keep-alive "), Conn.setrequestmethod (" POST "), Conn.setrequestproperty (" Content-type "," application/ X-www-form-urlencoded "); Conn.setrequestproperty (" CharSet "," Utf-8 "); Conn.setusecaches (false);// The Send POST request must be set to the following two lines conn.setdooutput (true); Conn.setdoinput (true); Conn.setreadtimeout (timeout_in_millions); Conn.setconnecttimeout (timeout_in_millions); if (param! = nulL &&!param.trim (). Equals ("")) {//Gets the output stream corresponding to the URLConnection object out = new PrintWriter (Conn.getoutputstream ());// Send request parameter out.print (param);//Flush output stream buffer Out.flush ();} Defines the BufferedReader input stream to read the response of the URL in = new BufferedReader (New InputStreamReader (Conn.getinputstream ())); String Line;while (line = In.readline ()) = null) {result + = line;}} catch (Exception e) {e.printstacktrace ();} Use the finally block to close the output stream, input stream finally{try{if (out! = null) {Out.close ();} if (in = null) {In.close ();}} catch (IOException ex) {ex.printstacktrace ();}} return result;}}

Tool classes related to asynchronous networks Httputils