微信公众号--Java

  public R getWxConfig(String url) {
        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

//        System.out.println("accessToken:" + accessToken + "\njsapi_ticket:" + jsapi_ticket + "\n时间戳：" + timestamp + "\n随机字符串：" + noncestr);

        //4、获取url
//        String url = "http://www.hyjkzj.com/add.html";
    /*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
//        try {
//            url = URLEncoder.encode(url, "UTF-8");
//        } catch ( UnsupportedEncodingException e) {
//        }
        String str = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + url.substring(7, url.length() - 7);

                //6、将字符串进行sha1加密
        String signature = SHA1(str);
//        System.out.println("参数：" + str + "\n签名：" + signature);
//        String AppId = "wx8fc9057b361ede42";//第三方用户唯一凭证
//        String secret = "9d44d95b76fed8d51f192ad87ba316f2";//第三方用户唯一凭证密钥，即appsecret
        return R.ok().put("appId", "wx0a328eb8eee9997f").put("timestamp", timestamp).put("noncestr", noncestr).put("signature", signature);
    }

public static String getAccessToken() {
    String access_token = "";
    String grant_type = "client_credential";//获取access_token填写client_credential
    String AppId = "wx0a328eb8eee9997f";//第三方用户唯一凭证
    String secret = "4e311b7cf2526b95cfcae96cc4c76eb9";//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);
        System.out.println("JSON字符串：" + demoJson);
        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);
        System.out.println("JSON字符串：" + demoJson);
        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 "";
}