java-URLConnection网络数据收取

通过url创建connection方式收取

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

@SuppressWarnings("all")
public class Test {
    public static void main(String[] args)throws Exception {
        URL url = new  URL("http://192.168.0.215:8080/tsportal/web/system/userOnlineCount");
        URLConnection connection =  url.openConnection();
        connection.setConnectTimeout(20000);
        connection.setReadTimeout(20000);
        connection.setUseCaches(false);
        connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11");
        InputStream is = connection.getInputStream();
        InputStreamReader inputStreamReader = new InputStreamReader(is, "utf-8");
        BufferedReader bis = new BufferedReader(inputStreamReader);
        String line = null;
        StringBuffer result = new StringBuffer();
        while ((line = bis.readLine()) != null) {
            result.append(line);
        }
        System.out.println(result.toString());
    }

}