java接入微信APP支付/支付宝APP支付

该资源为java接入微信和支付宝支付的后端代码，参考blog：http://blog.csdn.net/lawsonjin/article/details/78732252

package cn.xcdm.bag.controller;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jdom.JDOMException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.domain.AlipayTradeAppPayModel;
import com.alipay.api.request.AlipayTradeAppPayRequest;
import com.alipay.api.response.AlipayTradeAppPayResponse;
import cn.xcdm.bag.common.SystemValue;
import cn.xcdm.bag.po.Orders;
import cn.xcdm.bag.service.CouponService;
import cn.xcdm.bag.service.OrdersService;
import cn.xcdm.bag.service.UserService;
import cn.xcdm.bag.util.GsonUtils;
import cn.xcdm.bag.util.ResponseUtils;
import cn.xcdm.bag.util.Result;
import cn.xcdm.bag.util.SnowflakeIdWorker;
import cn.xcdm.bag.wechatpay.ConstantUtil;
import cn.xcdm.bag.wechatpay.Md5Util;
import cn.xcdm.bag.wechatpay.PrepayIdRequestHandler;
import cn.xcdm.bag.wechatpay.WXUtil;
import cn.xcdm.bag.wechatpay.xmlUtil;

@Controller
@ResponseBody
@RequestMapping（value = “v1“）
public class PayController {
	protected static final Log logger = LogFactory.getLog（PayController.class）;
	@Autowired
	private OrdersService orderService;
	@Autowired
	private UserService userService;
	@Autowired
	private CouponService couponService;

	/**
	 * 支付通用接口
	 * 
	 * @param HowToPay
	 * @param orderId
	 * @param forWhat
	 * @param payMoney
	 * @param req
	 * @return
	 */
	@RequestMapping（value = “/auth/pay/common“）
	public String commonPay（@RequestParam（value = “HowToPay“ required = true） String HowToPay
			@RequestParam（value = “orderId“ required = false） String orderId
			@RequestParam（value = “forWhat“ required = true） String forWhat
			@RequestParam（value = “payMoney“ required = false） String payMoney HttpServletRequest req
			HttpServletResponse res） {
		if （StringUtils.equals（“alipay“ HowToPay）） { // 支付宝 逻辑
			Orders orders = new Orders（）;
			Result result = new Result（）;
			String oldPhone = （String） req.getAttribute（“oldPhone“）;

			if （StringUtils.equals（“bag“ forWhat）） { // 存包逻辑
				orders = orderService.selectOrdersInfoByOrderId（orderId）;
				if （orders == null） {
					result.setCode（400）;
					result.setMsg（“订单号不存在“）;