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package com.itmaoo.scenic.wechat;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.UUID;

import net.sf.json.JSONObject;

public class WechatUtil {
	public static String getAccessToken() {
	    String access_token = "";

	    String grant_type = "client_credential";//获取access_token填写client_credential
	    String AppId="wx21f739a95a0a7e99";//第三方用户唯一凭证
	    String secret="655a85c8a9ee02f236940b03dd3c7012";//第三方用户唯一凭证密钥,即appsecret
	    //这个url链接地址和参数皆不能变
	    String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type="+grant_type+"&appid="+AppId+"&secret="+secret;

	    try {
	        URL urlGet = new URL(url);
	        HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
	        http.setRequestMethod("GET"); // 必须是get方式请求
	        http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
	        http.setDoOutput(true);
	        http.setDoInput(true);
	        System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
	        System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
	        http.connect();
	        InputStream is = http.getInputStream();
	        int size = is.available();
	        byte[] jsonBytes = new byte[size];
	        is.read(jsonBytes);
	        String message = new String(jsonBytes, "UTF-8");
	        JSONObject demoJson = JSONObject.fromObject(message);
	        access_token = demoJson.getString("access_token");
	        is.close();
	    } catch (Exception e) {
	            e.printStackTrace();
	    }
	    return access_token;
	}
	public static String getTicket(String access_token) {
	    String ticket = null;
	    String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+ access_token +"&type=jsapi";//这个url链接和参数不能变
	    try {
	        URL urlGet = new URL(url);
	        HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
	        http.setRequestMethod("GET"); // 必须是get方式请求
	        http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
	        http.setDoOutput(true);
	        http.setDoInput(true);
	        System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
	        System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
	        http.connect();
	        InputStream is = http.getInputStream();
	        int size = is.available();
	        byte[] jsonBytes = new byte[size];
	        is.read(jsonBytes);
	        String message = new String(jsonBytes, "UTF-8");
	        JSONObject demoJson = JSONObject.fromObject(message);
	        ticket = demoJson.getString("ticket");
	        is.close();
	    } catch (Exception e) {
	            e.printStackTrace();
	    }
	    return ticket;
	}
	public static String SHA1(String decript) {
	    try {
	        MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
	        digest.update(decript.getBytes());
	        byte messageDigest[] = digest.digest();
	        // Create Hex String
	        StringBuffer hexString = new StringBuffer();
	        // 字节数组转换为 十六进制 数
	            for (int i = 0; i < messageDigest.length; i++) {
	                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
	                if (shaHex.length() < 2) {
	                    hexString.append(0);
	                }
	                hexString.append(shaHex);
	            }
	            return hexString.toString();

	        } catch (NoSuchAlgorithmException e) {
	            e.printStackTrace();
	        }
	        return "";
	}
	public static void main(String[] args) {
	    //1、获取AccessToken
	    String accessToken = getAccessToken();

	    //2、获取Ticket
	    String jsapi_ticket = getTicket(accessToken);

	    //3、时间戳和随机字符串
	    String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
	    String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳

	    //4、获取url
	    String url="http://www.itmaoo.com/a/77F28A6B";
	    /*根据JSSDK上面的规则进行计算,这里比较简单,我就手动写啦
	    String[] ArrTmp = {"jsapi_ticket","timestamp","nonce","url"};
	    Arrays.sort(ArrTmp);
	    StringBuffer sf = new StringBuffer();
	    for(int i=0;i<ArrTmp.length;i++){
	        sf.append(ArrTmp[i]);
	    }
	    */

	    //5、将参数排序并拼接字符串
	    String str = "jsapi_ticket="+jsapi_ticket+"&noncestr="+noncestr+"&timestamp="+timestamp+"&url="+url;

	    //6、将字符串进行sha1加密
	    String signature =SHA1(str);
	}
	public static SignConfig getSign(String path) {
		//1、获取AccessToken
	    String accessToken = getAccessToken();

	    //2、获取Ticket
	    String jsapi_ticket = getTicket(accessToken);

	    //3、时间戳和随机字符串
	    String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
	    String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳

	    //4、获取url
	    String url="http://www.itmaoo.com/"+path;
	    /*根据JSSDK上面的规则进行计算,这里比较简单,我就手动写啦
	    String[] ArrTmp = {"jsapi_ticket","timestamp","nonce","url"};
	    Arrays.sort(ArrTmp);
	    StringBuffer sf = new StringBuffer();
	    for(int i=0;i<ArrTmp.length;i++){
	        sf.append(ArrTmp[i]);
	    }
	    */

	    //5、将参数排序并拼接字符串
	    String str = "jsapi_ticket="+jsapi_ticket+"&noncestr="+noncestr+"&timestamp="+timestamp+"&url="+url;

	    //6、将字符串进行sha1加密
	    String signature =SHA1(str);
	    SignConfig sc = new SignConfig();
	    sc.setNoncestr(noncestr);
	    sc.setSignature(signature);
	    sc.setTimestamp(timestamp);
	    sc.setUrl(url);
		return sc;
	}
}