java读取url中json文件中的json数据

此方法可作为工具类，如果大家有更好的，欢迎探讨

import java.io.*;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
public class readHTTPData {
    /**
     * cuiqingwei-inset  date:2022.8.5  for:java读取url中json文件中的json数据
     */
    public static String readByUrlData(String url,String open) {
        try {
            String json = "";
            URL urls = new URL(url);
            java.net.HttpURLConnection conn = (java.net.HttpURLConnection) urls.openConnection();
            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod(open);
            conn.setRequestProperty("contentType", "UTF-8");
            InputStream inputStream = conn.getInputStream();
            BufferedReader bf = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
            String line = null;
            while ((line = bf.readLine()) != null) {//一行一行的读
                json = json + line;
            }
            if (inputStream != null) {
                inputStream.close();
            }
            String[] strs = json.split("\\\\");
            String str = "";
            StringBuffer jsons = new StringBuffer("");
            for (int i = 0; i < strs.length; i++) {
                str = strs[i];
                jsons = jsons.append(str);
            }
            jsons.replace(0, 1, "{");
            jsons.replace(jsons.length() - 1, jsons.length(), "}");
            return jsons.toString();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }


}