纯JAVA HTTPURL 访问制定url地址返回页面数据

package HttpConn;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Map;
import javax.net.ssl.HttpsURLConnection;
public class ConnUrl {



public static void main(String args[]) throws IOException{
requestData("你的URL地址",null);

}

public static void requestData(String urlString,Map params) throws IOException{
    URL url=new URL(urlString);
    HttpsURLConnection openConnection=(HttpsURLConnection)url.openConnection();
    openConnection.setReadTimeout(10000);
    openConnection.setConnectTimeout(10000);
    BufferedReader br=new BufferedReader(new                               InputStreamReader(openConnection.getInputStream(),"UTF-8"));
   StringBuffer stringBuffer=new StringBuffer();
   String s =null;
   while((s = br.readLine())!=null){
    stringBuffer.append(s+"\n");
   }
   System.out.println(stringBuffer);
}

}

以和风天气API为例返回结果