live-payjs-sdk

//密钥去官网申请
private WxPayApi api = new WxPayApi(new PayJSConfig("商户号", "密钥"));

/**生成支付的二维码*/
@Action
public JsonData getQr() throws IOException {
    //回调的url
    String url_huidiao = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + "/" + "pay/psyJs.huidiao.html";
    //封装支付信息
    ClientPayInfo payInfo = new ClientPayInfo();
    String id = "qb" + System.currentTimeMillis();
    payInfo.setTotal_fee(Convert.toLongValue(user.getAmount() * 100)).setBody(user.getEmail()).setNotify_url(url_huidiao).setOut_trade_no(id).setAttach("qb");

    ScanResult scan = api.scan(payInfo);
    user.setCreateTime(new JDateTime().getTimeInMillis());
    return new JsonData(scan);
}

/**验证订单信息(是否用户已经扫描支付完成)*/
@Action
public JsonData checkOrder() throws UnsupportedEncodingException {
    Order order = api.getOrder(orderId);//根据订单id获取订单信息
    if (order.getStatus() == 1) {// 支付成功
        this.look("支付完成");
    }
    return new JsonData(order);
}

/**收银台*/
@Action
public JsonData getWxPay() throws UnsupportedEncodingException{
    String url_huidiao = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + "/" + "pay/psyJs.huidiao.html";
    String callback_url = "http://qiongbi.chenwenxi.cc";//用户支付成功后，前端跳转地址
    ClientPayInfo payInfo = new ClientPayInfo();
    payInfo.setCallback_url(callback_url);
    String id = "qb" + System.currentTimeMillis();
    payInfo.setTotal_fee(Convert.toLongValue(user.getAmount() * 100)).setBody(user.getEmail()).setNotify_url(url_huidiao).setOut_trade_no(id).setAttach("qb");
    return new JsonData(payInfo);
}