从Internet获取数据-android初学者ppt

从Internet获取数据利用HttpURLConnection对象,我们可以从网络中获取网页数据. URL url = new URL("http://www.sohu.com"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(6* 1000);//设置连接超时if (conn.getResponseCode() != 200) throw new RuntimeException("请求url失败"); InputStream is = conn.getInputStream();//得到网络返回的输入流String result = readData(is, "GBK"); conn.disconnect(); System.out.println(result); //第一个参数为输入流,第二个参数为字符集编码public static String readData(InputStream inSream, String charsetName) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = -1; while( (len = inSream.read(buffer)) != -1 ){ outStream.write(buffer, 0, len); } byte[] data = outStream.toByteArray(); outStream.close(); inSream.close(); return new String(data, charsetName); }