package com.example.jz.utils;

import org.apache.http.*;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;


public class HttpUtil {

    private static final CloseableHttpClient httpclient = HttpClients.createDefault();

    public static String doGet(String urlPath, Map<String, Object> params)
            throws Exception {
        StringBuilder sb = new StringBuilder(urlPath);
        if (params != null && !params.isEmpty()) { // 说明有参数
            sb.append("?");

            Set<Entry<String, Object>> set = params.entrySet();
            for (Entry<String, Object> entry : set) { // 遍历map里面的参数
                String key = entry.getKey();
                String value = "";
                if (null != entry.getValue()) {
                    value = entry.getValue().toString();
                    // 转码
                    value = URLEncoder.encode(value, "UTF-8");
                }
                sb.append(key).append("=").append(value).append("&");
            }

            sb.deleteCharAt(sb.length() - 1); // 删除最后一个&
        }
        // System.out.println(sb.toString());

        URL url = new URL(sb.toString());
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setConnectTimeout(5000); // 5s超时
        conn.setRequestMethod("GET");

        if (conn.getResponseCode() == HttpStatus.SC_OK) {// HttpStatus.SC_OK ==
            // 200
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    conn.getInputStream()));
            StringBuilder sbs = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sbs.append(line);
            }
            // JSONObject jsonObject = new JSONObject(sbs.toString());
            return sbs.toString();
        }

        return null;
    }


    /**
     * 发送HttpPost请求，参数为map
     * @param url
     * @param map
     * @return
     */
    public static String sendPost(String url, Map<String, Object> map) {
        List<NameValuePair> formparams = new ArrayList<NameValuePair>();
        for (Entry<String, Object> entry : map.entrySet()) {
            formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue().toString()));
        }
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
        HttpPost httppost = new HttpPost(url);
        httppost.setEntity(entity);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httppost);
        } catch (IOException e) {
            e.printStackTrace();
        }
        HttpEntity entity1 = response.getEntity();
        String result = null;
        try {
            result = EntityUtils.toString(entity1);
        } catch (ParseException | IOException e) {
            e.printStackTrace();
        }
        return result;
    }
}