常用的几种网络请求OkHttpClient , HttpClient和 HttpURLConnection

OkHttpClient:(okhttp3.OkHttpClient包下的 使用的时候需要添加这个包) public class Util { public static void getBytesByOkhttp(String path,CallBack callBack){ new Thread(new Runnable() { public void run() { // 1 OkHttpClient client = new OkHttpClient(); // 2 Request request = new Request.Builder().url(path).build(); // 3 try { Response response = client.newCall(request).execute(); // 4 if(response.isSuccessful()){ byte[] bs = response.body().bytes(); callBack.callback(bs); //return bs; } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); } }

2.HttpClient:( org.apache.http包下的,使用的时候也需要添加该包)

public class HttpUtils { public static byte[] getByteFromUrl(String path) { HttpClient client=new DefaultHttpClient(); HttpGet request=new HttpGet(path); try { HttpResponse response = client.execute(request); if(response.getStatusLine().getStatusCode()==200){ HttpEntity entity = response.getEntity(); return EntityUtils.toByteArray(entity); } } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } }

HttpURLConnection:(java.net包下的,不需要添加依赖,直接就可以使用)这个涉及到读写流,略显繁琐..

public class Httputils { public static String getByteFromUrl(String path) { InputStream is=null; ByteArrayOutputStream baos=null; try { URL url=new URL(path); HttpURLConnection connection=(HttpURLConnection) url.openConnection(); connection.setConnectTimeout(5000); if(connection.getResponseCode()==200){ is=connection.getInputStream(); baos=new ByteArrayOutputStream(); int len=0; byte [] by=new byte[1024*8]; while((len=is.read(by))!=-1){ baos.write(by,0,len); return baos.toString(); } }