java post 获取相应内容和状态码

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Map<String,String> map = new HashMap<String,String>();PrintWriter out = null;        BufferedReader in = null;        HttpURLConnection conn = null;        String res = "";                try {            URL realUrl = new URL(url);                        conn = (HttpURLConnection) realUrl.openConnection();            conn.setDoOutput(true);            conn.setDoInput(true);                        out = new PrintWriter(conn.getOutputStream());                        out.print(str);            out.flush();                        conn.connect();            map.put("code", conn.getResponseCode() + "");                        in = new BufferedReader(new InputStreamReader(conn.getInputStream()));                        String line;            while ((line = in.readLine()) != null) {                res += line;            }        } catch (Exception e) {        System.out.println( ",发送 POST 请求出现异常！"+e);            e.printStackTrace();        }        finally{            try{                if(out!=null){                    out.close();                }                if(in!=null){                    in.close();                }            }            catch(IOException ex){                ex.printStackTrace();            }        }        map.put("res", res);        return map;

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