package com.yihu.platform.utils;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * http工具类
 *
 * @author jcl
 * @company yihu.com
 * @since 2014-12-29
 */
public class HttpUtil {
    private URL url;
    private HttpURLConnection conn;
    private Map<String, String> headers = new HashMap<String, String>();//头信息

    private static final String CHARSET = "utf-8";
    private static final String POST = "POST";
    private static final String GET = "GET";

    public HttpUtil(URL url) {
        this.url = url;
    }

    public HttpUtil(String url) throws MalformedURLException {
        this.url = new URL(url);
    }


    public String post(Map<String, String> param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            // 打开和URL之间的连接
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod(POST);
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset="+CHARSET);
            for (Entry<String, String> entry : headers.entrySet()) {
                conn.setRequestProperty(entry.getKey(), entry.getValue());
            }
            // 发送POST请求必须设置如下两行
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            StringBuilder paramStr = new StringBuilder();
            if (param != null) {
                for (Entry entry : param.entrySet()) {
                    paramStr.append(entry.getKey()).append("=");
                    if (StringUtil.isNotEmpty(entry.getValue())) paramStr.append(entry.getValue());
                    paramStr.append("&");
                }
                if (paramStr.length() > 0) paramStr.deleteCharAt(paramStr.length() - 1);
//                System.out.println(paramStr);
            }
            out.print(paramStr.toString());
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(), CHARSET));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }




    public String get(Map<String, String> param) {
        String result = "";
        BufferedReader in = null;
        try {
            StringBuilder paramStr = new StringBuilder();
            if (param != null) {
                for (Entry entry : param.entrySet()) {
                    paramStr.append(entry.getKey()).append("=");
                    if (StringUtil.isNotEmpty(entry.getValue())) paramStr.append(entry.getValue());
                    paramStr.append("&");
                }
                if (paramStr.length() > 0) paramStr.deleteCharAt(paramStr.length() - 1);
//                System.out.println(paramStr);
            }
            String urlNameString = url.toString() + "?" + paramStr.toString();
            System.out.println("请求串------->" + urlNameString);
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            conn = (HttpURLConnection) realUrl.openConnection();
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod(GET);
            for (Entry<String, String> entry : headers.entrySet()) {
                conn.setRequestProperty(entry.getKey(), entry.getValue());
            }
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset="+CHARSET);
            // 建立实际的连接
            conn.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = conn.getHeaderFields();
            // 遍历所有的响应头字段
//            for (String key : map.keySet()) {
//                System.out.println(key + "--->" + map.get(key));
//            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    conn.getInputStream(), CHARSET));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }





    public void setHeader(String key, String value) {
        headers.put(key, value);
    }

    public URL getUrl() {
        return url;
    }

    public void setUrl(URL url) {
        this.url = url;
    }

    public HttpURLConnection getConn() {
        return conn;
    }

    public void setConn(HttpURLConnection conn) {
        this.conn = conn;
    }

    public Map<String, String> getHeaders() {
        return headers;
    }

    public void setHeaders(Map<String, String> headers) {
        this.headers = headers;
    }


    public static void main(String[] args) throws Exception {
        HttpUtil httpUtil = new HttpUtil("http://ehr.yihu.com/wlyy/gc/accesstoken");
        Map map = new HashMap();
        map.put("appid", "915d0345-5b1d-11e6-8344-fa163e8aee56");
        map.put("appSecret", "915d0345-5b1d-11e6-8344-fa163e8aee52");
        String resp = httpUtil.post(map);
        System.out.println(resp);


    }
}