import java.io.ByteArrayOutputStream;

import java.io.Closeable;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

/**

* Created by Administrator on 2016/5/22.

*/

public class HttpUtil {

public static byte[] get(String urlString) {

HttpURLConnection urlConnection = null;

try {

URL url = new URL(urlString);

urlConnection = (HttpURLConnection) url.openConnection();

//设置请求方法

urlConnection.setRequestMethod("GET");

//设置超时时间

urlConnection.setConnectTimeout(5000);

urlConnection.setReadTimeout(3000);

//获取响应的状态码

int responseCode = urlConnection.getResponseCode();

if (responseCode == 200) {

ByteArrayOutputStream bos = new ByteArrayOutputStream();

InputStream in = urlConnection.getInputStream();

byte[] buffer = new byte[4 * 1024];

int len = -1;

while((len = in.read(buffer)) != -1) {

bos.write(buffer, 0, len);

}

close(in);

byte[] result = bos.toByteArray();

close(bos);

return result;

} else {

return null;

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if (urlConnection != null) {

urlConnection.disconnect();

}

}

return null;

}

private static void close(Closeable stream) {

if (stream != null) {

try {

stream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}