对接JSAPI支付

官方统一下单参数说明

https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1

下载证书

 

1.参数配置类

package wxpay.config;

public class Constant {
	/**
	 * 公众号AppId
	 */
	public static final String APP_ID = "wx2bef02******dfc";

	/**
	 * 公众号AppSecret
	 */
	public static final String APP_SECRET = "b1bf********285cb55bc212c7ece97";

	/**
	 * 微信支付商户号
	 */
	public static final String MCH_ID = "14******02";

	/**
	 * 微信支付API秘钥
	 */
	public static final String KEY = "QBmgXTJP7QDTud**********vfYh";

	/**
	 * 微信交易类型:公众号支付
	 */
	public static final String TRADE_TYPE_JSAPI = "JSAPI";

	/**
	 * WEB
	 */
	public static final String WEB = "WEB";

	/**
	 * 返回成功字符串
	 */
	public static final String RETURN_SUCCESS = "SUCCESS";

	/**
	 * 支付地址(包涵回调地址)
	 */
	public static final String PAY_URL = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx2bef02f0ed84edfc&redirect_uri=http%3a%2f%2fwxpay.pes-soft.com%2fwxpay%2fm%2fweChat%2funifiedOrder&response_type=code&scope=snsapi_base#wechat_redirect";

	/**
	 * 微信统一下单url
	 */
	public static final String UNIFIED_ORDER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";

	/**
	 * 微信申请退款url
	 */
	public static final String REFUND_URL = "https://api.mch.weixin.qq.com/secapi/pay/refund";

	/**
	 * 微信支付通知url
	 */
	public static final String NOTIFY_URL = "http://wxpay.pes-soft.com/wxpay/";
	
	/**
	 * 证书位置
	 */
	public static final String CERT_PATH = "H:/Ws/pes-wxpay/src/main/webapp/cert/apiclient_cert.p12";

	/**
	 * 通过code获取授权access_token的URL
	 */
	public static String Authtoken_URL(String code) {
		StringBuffer url = new StringBuffer();
		url.append("https://api.weixin.qq.com/sns/oauth2/access_token?appid=");
		url.append(Constant.APP_ID);
		url.append("&secret=");
		url.append(Constant.APP_SECRET);
		url.append("&code=");
		url.append(code);
		url.append("&grant_type=authorization_code");
		return url.toString();
	}
}

2.用户信息实体类

package wxpay.model;

import java.io.Serializable;

public class AuthToken implements Serializable {

	private static final long serialVersionUID = 8647249082921436361L;

	/**
	 * 授权access_token
	 */
	private String access_token;

	/**
	 * 有效期
	 */
	private String expires_in;

	/**
	 * 刷新access_token
	 */
	private String refresh_token;

	/**
	 * 用户OPENID
	 */
	private String openid;

	/**
	 * 授权方式Scope
	 */
	private String scope;

	/**
	 * 错误码
	 */
	private String errcode;

	/**
	 * 错误消息
	 */
	private String errmsg;

	public String getAccess_token() {
		return access_token;
	}

	public void setAccess_token(String access_token) {
		this.access_token = access_token;
	}

	public String getExpires_in() {
		return expires_in;
	}

	public void setExpires_in(String expires_in) {
		this.expires_in = expires_in;
	}

	public String getRefresh_token() {
		return refresh_token;
	}

	public void setRefresh_token(String refresh_token) {
		this.refresh_token = refresh_token;
	}

	public String getOpenid() {
		return openid;
	}

	public void setOpenid(String openid) {
		this.openid = openid;
	}

	public String getScope() {
		return scope;
	}

	public void setScope(String scope) {
		this.scope = scope;
	}

	public String getErrcode() {
		return errcode;
	}

	public void setErrcode(String errcode) {
		this.errcode = errcode;
	}

	public String getErrmsg() {
		return errmsg;
	}

	public void setErrmsg(String errmsg) {
		this.errmsg = errmsg;
	}

}

3.支付参数实体类

package wxpay.model;

import com.thoughtworks.xstream.annotations.XStreamAlias;

public class PaySendData {

	/**
	 * 公众账号ID[必须]
	 */
	@XStreamAlias("appid")
	private String appId;

	/**
	 * 商户号[必须]
	 */
	@XStreamAlias("mch_id")
	private String mch_id;

	/**
	 * 设备号[WEB]
	 */
	@XStreamAlias("device_info")
	private String device_info;

	/**
	 * 随机字符串[必须]
	 */
	@XStreamAlias("nonce_str")
	private String nonce_str;

	/**
	 * 签名[必须]
	 */
	@XStreamAlias("sign")
	private String sign;

	/**
	 * 商品描述[必须]
	 */
	@XStreamAlias("body")
	private String body;

	/**
	 * 商品详情
	 */
	@XStreamAlias("detail")
	private String detail;

	/**
	 * 附加数据
	 */
	@XStreamAlias("attach")
	private String attach;

	/**
	 * 商户订单号[必须]
	 */
	@XStreamAlias("out_trade_no")
	private String out_trade_no;

	/**
	 * 货币类型
	 */
	@XStreamAlias("fee_type")
	private String fee_type;

	/**
	 * 交易金额 [必须]
	 */
	@XStreamAlias("total_fee")
	private int total_fee;

	/**
	 * 交易类型 [必须]
	 */
	@XStreamAlias("trade_type")
	private String trade_type;

	/**
	 * 通知地址 [必须]
	 */
	@XStreamAlias("notify_url")
	private String notify_url;

	/**
	 * 终端Ip [必须]
	 */
	@XStreamAlias("spbill_create_ip")
	private String spbill_create_ip;

	/**
	 * 订单生成时间yyyyMMddHHmmss
	 */
	@XStreamAlias("time_start")
	private String time_start;

	/**
	 * 订单失效时间yyyyMMddHHmmss 间隔>5min
	 */
	@XStreamAlias("time_expire")
	private String time_expire;

	/**
	 * 用户标识 tradeType=JSAPI时必须
	 */
	@XStreamAlias("openid")
	private String openId;

	/**
	 * 商品标记
	 */
	@XStreamAlias("goods_tag")
	private String goods_tag;

	/** 指定支付方式 */
	@XStreamAlias("limit_pay")
	private String limit_pay;

	// ===============以下属性为申请退款参数===================

	/**
	 * 微信订单号 [必须] 与商户退款单号二选一
	 */
	@XStreamAlias("transaction_id")
	private String transaction_id;

	/**
	 * 商户退款单号 [必须] 与微信单号二选一
	 */
	@XStreamAlias("out_refund_no")
	private String out_refund_no;

	/**
	 * 退款金额 [必须]
	 */
	@XStreamAlias("refund_fee")
	private Integer refund_fee;

	/**
	 * 退款货币种类
	 */
	@XStreamAlias("refund_fee_type")
	private String refund_fee_type;

	/**
	 * 操作员账号:默认为商户号 [必须]
	 */
	@XStreamAlias("op_user_id")
	private String op_user_id;

	public PaySendData() {
	}

	public String getAppId() {
		return appId;
	}

	public void setAppId(String appId) {
		this.appId = appId;
	}

	public String getMch_id() {
		return mch_id;
	}

	public void setMch_id(String mch_id) {
		this.mch_id = mch_id;
	}

	public String getDevice_info() {
		return device_info;
	}

	public void setDevice_info(String device_info) {
		this.device_info = device_info;
	}

	public String getNonce_str() {
		return nonce_str;
	}

	public void setNonce_str(String nonce_str) {
		this.nonce_str = nonce_str;
	}

	public String getSign() {
		return sign;
	}

	public void setSign(String sign) {
		this.sign = sign;
	}

	public String getBody() {
		return body;
	}

	public void setBody(String body) {
		this.body = body;
	}

	public String getDetail() {
		return detail;
	}

	public void setDetail(String detail) {
		this.detail = detail;
	}

	public String getAttach() {
		return attach;
	}

	public void setAttach(String attach) {
		this.attach = attach;
	}

	public String getOut_trade_no() {
		return out_trade_no;
	}

	public void setOut_trade_no(String out_trade_no) {
		this.out_trade_no = out_trade_no;
	}

	public String getFee_type() {
		return fee_type;
	}

	public void setFee_type(String fee_type) {
		this.fee_type = fee_type;
	}

	public int getTotal_fee() {
		return total_fee;
	}

	public void setTotal_fee(int total_fee) {
		this.total_fee = total_fee;
	}

	public String getTrade_type() {
		return trade_type;
	}

	public void setTrade_type(String trade_type) {
		this.trade_type = trade_type;
	}

	public String getNotify_url() {
		return notify_url;
	}

	public void setNotify_url(String notify_url) {
		this.notify_url = notify_url;
	}

	public String getSpbill_create_ip() {
		return spbill_create_ip;
	}

	public void setSpbill_create_ip(String spbill_create_ip) {
		this.spbill_create_ip = spbill_create_ip;
	}

	public String getTime_start() {
		return time_start;
	}

	public void setTime_start(String time_start) {
		this.time_start = time_start;
	}

	public String getTime_expire() {
		return time_expire;
	}

	public void setTime_expire(String time_expire) {
		this.time_expire = time_expire;
	}

	public String getOpenId() {
		return openId;
	}

	public void setOpenId(String openId) {
		this.openId = openId;
	}

	public String getGoods_tag() {
		return goods_tag;
	}

	public void setGoods_tag(String goods_tag) {
		this.goods_tag = goods_tag;
	}

	public String getLimit_pay() {
		return limit_pay;
	}

	public void setLimit_pay(String limit_pay) {
		this.limit_pay = limit_pay;
	}

	public String getTransaction_id() {
		return transaction_id;
	}

	public void setTransaction_id(String transaction_id) {
		this.transaction_id = transaction_id;
	}

	public String getOut_refund_no() {
		return out_refund_no;
	}

	public void setOut_refund_no(String out_refund_no) {
		this.out_refund_no = out_refund_no;
	}

	public Integer getRefund_fee() {
		return refund_fee;
	}

	public void setRefund_fee(Integer refund_fee) {
		this.refund_fee = refund_fee;
	}

	public String getRefund_fee_type() {
		return refund_fee_type;
	}

	public void setRefund_fee_type(String refund_fee_type) {
		this.refund_fee_type = refund_fee_type;
	}

	public String getOp_user_id() {
		return op_user_id;
	}

	public void setOp_user_id(String op_user_id) {
		this.op_user_id = op_user_id;
	}

}

4.service

package wxpay.service;

import wxpay.model.AuthToken;

public interface PayService {
	
	/**
	 * 统一下单接口
	 * @param authToken 授权token
	 * @param remoteAddr 请求主机ip
	 * @return prepayId 预支付id
	 */
	String unifiedOrder(AuthToken authToken, String remoteAddr);
	
	/**
	 * 申请退款接口
	 */
	String refund();
}

serviceImpl

package wxpay.service;

import java.lang.reflect.Field;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.util.EntityUtils;
import org.springframework.stereotype.Service;

import wxpay.config.Constant;
import wxpay.model.AuthToken;
import wxpay.model.PaySendData;
import wxpay.utils.HttpUtil;
import wxpay.utils.PayUtils;

@Service("payService")
public class PayServiceImpl implements PayService {

	/**
	 * 微信支付统一下单
	 **/
	public String unifiedOrder(AuthToken authToken, String remoteAddr) {
		Map resultMap = null;
		// 统一下单返回的预支付id
		String prepayId = null;
		PaySendData paySendData = new PaySendData();
		// 构建微信支付请求参数集合
		paySendData.setAppId(Constant.APP_ID);
		paySendData.setMch_id(Constant.MCH_ID);
		paySendData.setNotify_url(Constant.NOTIFY_URL);
		paySendData.setTrade_type(Constant.TRADE_TYPE_JSAPI);
		paySendData.setDevice_info(Constant.WEB);
		paySendData.setBody("商品名称");
		paySendData.setNonce_str(PayUtils.getRandomStr(32));
		paySendData.setOut_trade_no(PayUtils.getRandomStr(8));
		paySendData.setTotal_fee(1);
		paySendData.setSpbill_create_ip(remoteAddr);
		paySendData.setOpenId(authToken.getOpenid());
		// 将参数拼成map,生产签名
		paySendData.setSign(PayUtils.getSign(buildParamMap(paySendData)));
		// 将请求参数对象转换成xml
		String reqXml = PayUtils.sendDataToXml(paySendData);
		try {
			// 发送请求
			CloseableHttpResponse response = HttpUtil.Post(Constant.UNIFIED_ORDER_URL, reqXml, false);
			try {
				resultMap = PayUtils.parseXml(response.getEntity().getContent());
				// 关闭流
				EntityUtils.consume(response.getEntity());
			} finally {
				response.close();
			}
		} catch (Exception e) {
			System.out.println("微信支付统一下单异常");
		}
		String return_code = resultMap.get("return_code");
		String result_code = resultMap.get("result_code");
		if (Constant.RETURN_SUCCESS.equals(return_code) && Constant.RETURN_SUCCESS.equals(result_code)) {
			// return_code=通信标识
			// result_code=交易标识
			// 只有当returnCode与resultCode均返回“success”，才代表微信支付统一下单成功
			prepayId = "prepay_id=" + resultMap.get("prepay_id");
		}
		return prepayId;
	}

	public String refund() {
		PaySendData paySendData = new PaySendData();
		// 构建微信支付请求参数集合
		paySendData.setAppId(Constant.APP_ID);
		paySendData.setMch_id(Constant.MCH_ID);
		paySendData.setNonce_str(PayUtils.getRandomStr(32));
		// paySendData.setTransaction_id(WeChatUtils.getRandomStr(32));
		// Out_trade_no与Transaction_id二选一
		paySendData.setOut_trade_no("jtVFcgbM");
		paySendData.setOut_refund_no("jtVFcgbM");
		paySendData.setTotal_fee(1);
		paySendData.setRefund_fee(1);
		paySendData.setOp_user_id(Constant.MCH_ID);
		// 将参数拼成map,生产签名
		paySendData.setSign(PayUtils.getSign(buildParamMap(paySendData)));
		// 将请求参数对象转换成xml
		String reqXml = PayUtils.sendDataToXml(paySendData);
		try {
			// 发送请求
			CloseableHttpResponse response = HttpUtil.Post(Constant.UNIFIED_ORDER_URL, reqXml, true);
			try {
				// 关闭流
				EntityUtils.consume(response.getEntity());
			} finally {
				response.close();
			}
		} catch (Exception e) {
			System.out.println("微信退款异常");
		}
		return null;
	}

	/**
	 * 构建统一下单参数map 用于生成签名
	 * 
	 * @param data
	 * @return SortedMap
	 */
	private SortedMap buildParamMap(PaySendData data) {
		SortedMap paramters = new TreeMap();
		Field[] fields = data.getClass().getDeclaredFields();
		try {
			for (Field field : fields) {
				field.setAccessible(true);
				if (null != field.get(data)) {
					paramters.put(field.getName().toLowerCase(), field.get(data).toString());
				}
			}
		} catch (Exception e) {
			System.out.print("构建签名map错误: ");
			e.printStackTrace();
		}

		return paramters;
	}

}

5.主页controller

package wxpay.ctrl;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import wxpay.config.Constant;

@Controller
@RequestMapping(value = "/")
public class IndexController {
	@RequestMapping(value = "/")
	public String index(Model model) {
		model.addAttribute("payURL", Constant.PAY_URL);
		return "index";
	}
}

支付controller

package wxpay.ctrl;

import java.util.SortedMap;
import java.util.TreeMap;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import wxpay.config.Constant;
import wxpay.model.AuthToken;
import wxpay.service.PayService;
import wxpay.utils.PayUtils;

@Controller
@RequestMapping(value = "/m/weChat")
public class WeChatOrderController {

	@Autowired
	private PayService payService;

	/**
	 * 统一下单
	 */
	@RequestMapping(value = "/unifiedOrder")
	public String unifiedOrder(HttpServletRequest request, Model model) {
		// 用户同意授权，获得的code
		String code = request.getParameter("code");
		// 通过code获取网页授权access_token
		AuthToken authToken = PayUtils.getTokenByAuthCode(code);
		// 调用统一下单service
		String prepayId = payService.unifiedOrder(authToken, request.getRemoteAddr());
		if (!PayUtils.isEmpty(prepayId)) {
			String timeStamp = PayUtils.getTimeStamp();// 当前时间戳
			String nonceStr = PayUtils.getRandomStr(20);// 不长于32位的随机字符串

			SortedMap signMap = new TreeMap();// 自然升序map
			signMap.put("appId", Constant.APP_ID);
			signMap.put("package", prepayId);
			signMap.put("timeStamp", timeStamp);
			signMap.put("nonceStr", nonceStr);
			signMap.put("signType", "MD5");

			model.addAttribute("appId", Constant.APP_ID);
			model.addAttribute("timeStamp", timeStamp);
			model.addAttribute("nonceStr", nonceStr);
			model.addAttribute("prepayId", prepayId);
			model.addAttribute("paySign", PayUtils.getSign(signMap));// 获取签名
		} else {
			System.out.println("微信统一下单失败,订单编号:失败原因");
			return "redirect:/";// 支付下单失败，重定向至订单列表
		}
		// 将支付需要参数返回至页面，采用h5方式调用支付接口
		return "h5Pay";
	}

	/**
	 * 申请退款
	 */
	@RequestMapping(value = "/refund")
	public String refund(HttpServletRequest request, Model model) {
		// 调用统一下单service
		payService.refund();
		return "h5Pay";
	}
}

6.工具类

https://pan.baidu.com/s/1qWunw5piOxCeZynHIGMQWg 密码:wy31

7.页面

https://pan.baidu.com/s/15v0cWoXmjJJLF9L_4h17Ng  密码:1p6g