I can't apply to search guard to my project. how can i change something....

below used my elasticsearch call api

···

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HttpURLConnection conn;

InputStream connIs;

String contentType;

String returnData;

PrintWriter pw;

String method;

String param;

String url;

URL u = new URL(url);

conn = (HttpURLConnection) u.openConnection();

conn.setDoOutput(true);

conn.setRequestMethod(“POST”);

conn.connect();

pw = new PrintWriter(conn.getOutputStream());

pw.print(param);

pw.flush();

StringBuffer sb = new StringBuffer();

connIs = conn.getInputStream();

int l = 0;

byte b = new byte[4096];

while ( (l = connIs.read(b)) != -1 ) {

sb.append(new String(b, 0, l));

}

String returnData = sb.toString();

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addition : project do not change other library that required upper jdk(1.6)