whois查询

package Whois查询工具20;

import net.sf.json.JSONObject;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class WhoisCheck {
    public static final String DEF_CHATSET = "UTF-8";
    public static final int DEF_CONN_TIMEOUT = 30000;
    public static final int DEF_READ_TIMEOUT = 30000;
    public static String userAgent =  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
    public static final String APPKEY ="*********";//申请API的APPKEY
    public static void main(String args[]){
        System.out.println("请输出想要查询信息的域名");
        Scanner sc=new Scanner(System.in);
        String host=sc.next();
        whois(host);
    }
    public static void whois(String host){
        String result=null;
        String url="http://apidata.chinaz.com/CallAPI/Whois";
        Map params = new HashMap();
        params.put("domainName",host);
        params.put("key",APPKEY);
        try{
            result =net(url, params, "GET");
            JSONObject object = JSONObject.fromObject(result);
            if(object.getInt("StateCode")==1){
                System.out.println("该域名已经被注册过，详细信息如下：");
                System.out.print(object.getString("Result"));
            }
            else
                System.out.println("该域名还未曾被注册过");
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    public static String net(String strUrl, Map params, String method) throws Exception {
        HttpURLConnection conn = null;
        BufferedReader reader = null;
        String rs = null;
        try {
            StringBuffer sb = new StringBuffer();
            if(method==null || method.equals("GET")){
                strUrl = strUrl+"?"+urlencode(params);
            }
            URL url = new URL(strUrl);
            conn = (HttpURLConnection) url.openConnection();
            if(method==null || method.equals("GET")){
                conn.setRequestMethod("GET");
            }else{
                conn.setRequestMethod("POST");
                conn.setDoOutput(true);
            }
            conn.setRequestProperty("User-agent", userAgent);
            conn.setUseCaches(false);
            conn.setConnectTimeout(DEF_CONN_TIMEOUT);
            conn.setReadTimeout(DEF_READ_TIMEOUT);
            conn.setInstanceFollowRedirects(false);
            conn.connect();
            if (params!= null && method.equals("POST")) {
                try {
                    DataOutputStream out = new DataOutputStream(conn.getOutputStream());
                    out.writeBytes(urlencode(params));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            InputStream is = conn.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sb.append(strRead);
            }
            rs = sb.toString();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                reader.close();
            }
            if (conn != null) {
                conn.disconnect();
            }
        }
        return rs;
    }
    //将map型转为请求参数型
    public static String urlencode(Map data) {
        StringBuilder sb = new StringBuilder();
        for (Map.Entry i : data.entrySet()) {
            try {
                sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

}

输入域名查询信息