java通过URL请求数据时验证设置Basic Access Authentication

java.io.IOException: Server returned HTTP response code: 401 for URL: 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at Authenticate.authenticateUrl(Authenticate.java:62)
    at Authenticate.main(Authenticate.java:84)

 这是因为请求需要权限验证的原因，可以通过下面的方式解决

public static JSONObject requestGet(String urlstr,JSONObject body){
		JSONObject result=null;
		try{
			URL  url=new URL(urlstr);			
			URLConnection conn=url.openConnection();
			HttpURLConnection httpUrlConnection = (HttpURLConnection)conn;
			httpUrlConnection.setRequestMethod("GET");
			httpUrlConnection.setRequestProperty("accept", "application/json");
			httpUrlConnection.setRequestProperty("content-type", "application/json");
			String encoding = Base64.encode("username:password".getBytes("UTF-8"));
			httpUrlConnection.setRequestProperty("Authorization", String.format("Basic %s", encoding));
			httpUrlConnection.setDoInput(true);
			if(body!=null){
				httpUrlConnection.setDoOutput(true);			
				OutputStream os=httpUrlConnection.getOutputStream();			
				IOUtils.write(body.toString(), os, "utf-8");
				os.flush();
			}
		
			BufferedReader in = new BufferedReader(new InputStreamReader( httpUrlConnection.getInputStream(),"utf-8"));
			String str="";
			String inputLine;
			while ((inputLine = in.readLine()) != null) {
				str+=inputLine;
			}
			in.close();
			System.out.println("str："+str);
			result=new JSONObject(str);
			
		}catch(Exception e){
			e.printStackTrace();
		}
		
		return result;
		
	}