使用net包发送http请求

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;

import sun.net.www.protocol.http.HttpURLConnection;

public class UrlTest {
    public static void main(String[] args) throws Exception {
        //创建连接的url
        URL url = new URL("http://openapi.sparta.html5.qq.com");
        //创建连接,注意使用的包为sun.net.www.protocol.http.HttpURLConnection
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        //连接超时时间:16秒
        conn.setConnectTimeout(16000);
        //返回数据超时时间
        conn.setReadTimeout(16000);
        //使用流读取返回的数据
        InputStream is = conn.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is, "utf8"));
        String line = null;
        StringBuffer sb = new StringBuffer();
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        System.out.println(sb.toString());
    }
}