java httpUtil

public class HttpUtils {
    public static String getContent(String url, Map<String, String> heads, String charset, String method) throws Exception {
        URL httpUrl = new URL(url);
        HttpURLConnection httpURLConnection = (HttpURLConnection) httpUrl.openConnection(); ;
        // 设置报头
        if (heads != null) {
            for (Map.Entry entry : heads.entrySet()) {
                httpURLConnection.setRequestProperty((String) entry.getKey(), (String) entry.getValue());
            }
        }
        httpURLConnection.setRequestMethod(method);
        httpURLConnection.setDoInput(true);
        httpURLConnection.setInstanceFollowRedirects(true);
        httpURLConnection.connect();// 握手

        String result = "";
        BufferedReader in = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(), charset));
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
        return result;
    }

    public static void main(String[] args) throws Exception {
        String url = "";
        String ret = HttpUtils.getContent(url, null, "utf-8", "POST");
        System.out.println(ret);
    }
}