getRemoteIpJpa/src/main/java/com/rehome/getremoteipjpa/utils/QueryHelper.java

package com.rehome.getremoteipjpa.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class QueryHelper {
	public static String DATATYPE = "jsonp";
	public static String get(String urlString, String token) {
		try {
			URL url = new URL(urlString);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			conn.setConnectTimeout(5 * 1000);
			conn.setReadTimeout(5 * 1000);
			conn.setDoInput(true);
			conn.setDoOutput(true);
			conn.setUseCaches(false);
			conn.setInstanceFollowRedirects(false);
			conn.setRequestMethod("GET");
			conn.setRequestProperty("token", token);
			int responseCode = conn.getResponseCode();
			if (responseCode == 200) {
				StringBuilder builder = new StringBuilder();
				BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
				for (String s = br.readLine(); s != null; s = br.readLine()) {
					builder.append(s);
				}
				br.close();
				return builder.toString();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	public static String queryIP(String ip) {
		String url = "https://api.ip138.com/query/?ip=" + ip + "&datatype=" + DATATYPE;
		System.out.println("url:"+url);
		String token = "b8b56497ffff4e110a3bf44193f7f751";
		return get(url, token);
	}
}