@Test
public void mchPayTest() {
MchPayReq payReq = new MchPayReq();
payReq.setAppid("wx11111111");
payReq.setMchid("12333132312");
payReq.setOpenid("oza1323132");
...
MchPayResp payResp = mchPayService.mchPay(payReq);
}