java实现APP微信支付——工具

java实现APP微信支付——工具已封装

第一次写微信支付，看不懂文档…我百度了三天的， 终于看到很棒的博客了，分享下。 我感觉详细，很好

https://blog.csdn.net/m_sicily/article/details/82493171

博客下面有github 可以下载学习下

下面是我修改后的代码

随机生成订单工具类←←←←←←
WXController

import back.minsu.configure.Token;
import back.minsu.entity.MallOrderDetails;
import back.minsu.result.GetHotelXqRes;
import back.minsu.result.TokenRes;
import back.minsu.service.HotelOrderDetailsService;
import back.minsu.service.MallOrderDetailsService;
import back.minsu.utils.cs.module.service.WXserviceImpl;
import back.minsu.utils.cs.module.util.WxPayTool;
import back.minsu.utils.wxdl.PayParam;
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Map;

@RestController
@RequestMapping("wxPay")
public class WXController {
	
    @Autowired
    private WXserviceImpl wxPayService;

	//这里是我的一下业务操作，可以换成自己的
    @Autowired
    HotelOrderDetailsService orderService;
    @Autowired
    MallOrderDetailsService mallOrderDetailsService;
    @Autowired
    private HotelOrderDetailsService hotelOrderDetailsService;

    /**
     * 统一下单
     * 官方文档:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1
     *
     * @param param
     * @return
     * @throws Exception
     */
    @PostMapping("/pay")
    public Map<String, String> wxPay(@RequestBody PayParam param) throws Exception {
//        String attach = "{\"attach\":\"" + param.getType() + "\"}";
		
		//attach 是唯一的 额外参数！！！重点重点重点
		//所以 用json来存多个参数， 转成String然后在解析
        JSONObject object = new JSONObject();
        object.put("type",param.getType());
        object.put("id",param.getId());
        object.put("money",param.getMoney());
        String attach = object.toJSONString();
        //请求预支付订单  可以从自己的数据中查出订单编号
        String outTradeNo = "";
        Map<String, String> result = WxPayTool.wxPay(param.getMoney(), outTradeNo, "订单详情",attach);
        return result;
    }

    /**
     * 支付异步结果通知，我们在请求预支付订单时传入的地址
     * 官方文档 ：https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_7&index=3
     */
    @PostMapping(value = "notify")
    public String wxPayNotify(HttpServletRequest request) {
        String resXml = "";
        System.out.println("---------------");
        System.out.println("---------------");
        System.out.println("---------------");
        try {
            InputStream inputStream = request.getInputStream();
            //将InputStream转换成xmlString
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder sb = new StringBuilder();
            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                }
            } catch (IOException e) {
//                System.out.println(e.getMessage());
            } finally {
                try {
                    inputStream.close();
                } catch (IOException e) {
//                    e.printStackTrace();
                }
            }
            resXml = sb.toString();
            String result = wxPayService.payBack(resXml);
            return result;
        } catch (Exception e) {
//            System.out.println("微信手机支付失败:" + e.getMessage());
            String result = "" + "" + "" + " ";
            return result;
        }
    }
}

WXservice

import java.util.Map;

public interface WXservice {
    Map<String, String> dounifiedOrder(String attach, String total_fee) throws Exception;
    String payBack(String notifyData);
}

WXserviceImpl

package back.minsu.utils.cs.module.service;

import back.minsu.service.HotelOrderDetailsService;
import back.minsu.service.UserService;
import back.minsu.utils.cs.module.util.OurWxConfig;
import back.minsu.utils.cs.module.util.WxMD5Util;
import com.alibaba.fastjson.JSONObject;
import com.github.wxpay.sdk.WXPay;
import com.github.wxpay.sdk.WXPayUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WXserviceImpl implements WXservice {
    @Autowired
    private HotelOrderDetailsService HotelOrderDetailsService;
    @Autowired
    UserService userService;

    private static final Logger logger = LoggerFactory.getLogger("MainLogger");
    public static final String SPBILL_CREATE_IP = "47.93.85.ip";
//    public static final String NOTIFY_URL = "http://你的域名/v1/weixin/notify.json";
    public static final String TRADE_TYPE_APP = "APP";


    /**
     * 调用官方SDK 获取预支付订单等参数
     * @param attach 额外参数
     * @param total_fee 总价
     * @return
     * @throws Exception
     */
    @Override
    public Map<String, String> dounifiedOrder(String attach, String total_fee) throws Exception {
        WxMD5Util md5Util = new WxMD5Util();
        Map<String, String> returnMap = new HashMap<>();
        OurWxConfig config = new OurWxConfig();
        WXPay wxpay = new WXPay(config);
        Map<String, String> data = new HashMap<>();
        //生成商户订单号，不可重复
        String out_trade_no = "wxpay" + System.currentTimeMillis();

        data.put("appid", config.getAppID());
        data.put("mch_id", config.getMchID());
        data.put("nonce_str", WXPayUtil.generateNonceStr());
        String body = "订单支付";
        data.put("body", body);
        data.put("out_trade_no", out_trade_no);
        data.put("total_fee", "100");
        //自己的服务器IP地址
        data.put("spbill_create_ip", SPBILL_CREATE_IP);
        //异步通知地址（请注意必须是外网）
//        data.put("notify_url", NOTIFY_URL);
        //交易类型
        data.put("trade_type", TRADE_TYPE_APP);
        //附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据
        data.put("attach", attach);
        String sign1 = md5Util.getSign(data);
        data.put("sign", sign1);

        try {
            //使用官方API请求预付订单
            Map<String, String> response = wxpay.unifiedOrder(data);
            System.out.println(response);
            String returnCode = response.get("return_code");    //获取返回码
            //若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断
            if (returnCode.equals("SUCCESS")) {//主要返回以下5个参数
                String resultCode = response.get("result_code");
                returnMap.put("appid", response.get("appid"));
                returnMap.put("mch_id", response.get("mch_id"));
                returnMap.put("nonce_str", response.get("nonce_str"));
                returnMap.put("sign", response.get("sign"));
                if ("SUCCESS".equals(resultCode)) {//resultCode 为SUCCESS，才会返回prepay_id和trade_type
                    //获取预支付交易回话标志
                    returnMap.put("trade_type", response.get("trade_type"));
                    returnMap.put("prepay_id", response.get("prepay_id"));
                    return returnMap;
                } else {
                    //此时返回没有预付订单的数据
                    return returnMap;
                }
            } else {
                return returnMap;
            }
        } catch (Exception e) {
            System.out.println(e);
            //系统等其他错误的时候
        }
        return returnMap;
    }

    /**
     *
     * @param notifyData 异步通知后的XML数据
     * @return
     */
    @Override
    public String payBack(String notifyData) {
        System.out.println("---------------");
        System.out.println("---------------");
        OurWxConfig config = null;
        try {
            config = new OurWxConfig();
        } catch (Exception e) {
            e.printStackTrace();
        }
        WXPay wxpay = new WXPay(config);
        String xmlBack = "";
        Map<String, String> notifyMap = null;
        try {
            notifyMap = WXPayUtil.xmlToMap(notifyData);         // 调用官方SDK转换成map类型数据
            if (wxpay.isPayResultNotifySignatureValid(notifyMap)) {//验证签名是否有效，有效则进一步处理

                String return_code = notifyMap.get("return_code");//状态
                String out_trade_no = notifyMap.get("out_trade_no");//商户订单号
                
				//额外参数 接受并获取里面的 参数
                //额外参数 接受并获取里面的 参数
                //额外参数 接受并获取里面的 参数
                String attach = notifyMap.get("attach");

                JSONObject object = JSONObject.parseObject(attach);
                int type = object.getInteger("type"); //订单类型
                int id = object.getInteger("id");//订单id
                Double money = object.getDouble("money");//订单金额


                System.out.println("---------------");
                System.out.println(object.toJSONString());
                System.out.println("---------------");

                if (return_code.equals("SUCCESS")) {
                    if (out_trade_no != null) {
                        // 注意特殊情况：订单已经退款，但收到了支付结果成功的通知，不应把商户的订单状态从退款改成支付成功
                        // 注意特殊情况：微信服务端同样的通知可能会多次发送给商户系统，所以数据持久化之前需要检查是否已经处理过了，处理了直接返回成功标志
                        //业务数据持久化
                        System.err.println();
                        System.out.println("---------------");
                        System.err.println("支付成功");
                        System.out.println("---------------");

                        //此处可以进行自己的业务
                        //此处可以进行自己的业务
                        //此处可以进行自己的业务
                        //此处可以进行自己的业务
                       
                        System.out.println("---- 修改状态完成 ----");
                        logger.info("微信手机支付回调成功订单号:{}", out_trade_no);
                        xmlBack = "" + "" + "" + " ";
                    } else {
                        logger.info("微信手机支付回调失败订单号:{}", out_trade_no);
                        xmlBack = "" + "" + "" + " ";
                    }
                }
                return xmlBack;
            } else {
                // 签名错误，如果数据里没有sign字段，也认为是签名错误
                //失败的数据要不要存储？
                logger.error("手机支付回调通知签名错误");
                xmlBack = "" + "" + "" + " ";
                return xmlBack;
            }
        } catch (Exception e) {
            logger.error("手机支付回调通知失败", e);
            xmlBack = "" + "" + "" + " ";
        }
        return xmlBack;
    }

}

下面都放到util 里

OurWxConfig

import com.github.wxpay.sdk.WXPayConfig;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

/**
 * @Author: zyh
 * @Description: 项目描述
 * @Date: 2020/6/20 19:37
 */
public class OurWxConfig implements WXPayConfig {
    private byte[] certData;
    public static final String APP_ID = "**********";
    public static final String KEY = "**********";
    public static final String MCH_ID = "**********";

    public OurWxConfig() throws Exception {
        //从微信商户平台下载的安全证书存放的路径
        String certPath = "自己配置好放到服务器上的路径地址";
        File file = new File(certPath);
        InputStream certStream = new FileInputStream(file);
        this.certData = new byte[(int) file.length()];
        certStream.read(this.certData);
        certStream.close();
    }

    @Override
    public String getAppID() {
        return "******";
    }

    //parnerid，商户号
    @Override
    public String getMchID() {
        return "******";
    }

    @Override
    public String getKey() {
        return "******";
    }

    @Override
    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }

    @Override
    public int getHttpConnectTimeoutMs() {
        return 8000;
    }

    @Override
    public int getHttpReadTimeoutMs() {
        return 10000;
    }
}

WxMD5Util

import com.github.wxpay.sdk.WXPayConstants;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Map;
import java.util.Set;
/**
 * @Author: zyh
 * @Date: 2020/6/20 19:37
 */
public class WxMD5Util {
    public String getSign(Map<String, String> data) throws Exception {
        OurWxConfig config = new OurWxConfig();
        Set<String> keySet = data.keySet();
        String[] keyArray = keySet.toArray(new String[keySet.size()]);
        Arrays.sort(keyArray);
        StringBuilder sb = new StringBuilder();
        for (String k : keyArray) {
            if (k.equals(WXPayConstants.FIELD_SIGN)) {
                continue;
            }
            if (data.get(k).trim().length() > 0) // 参数值为空，则不参与签名
                sb.append(k).append("=").append(data.get(k).trim()).append("&");
        }
        sb.append("key=").append(config.getKey());
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        byte[] array = new byte[0];
        try {
            array = md.digest(sb.toString().getBytes("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        StringBuilder sb2 = new StringBuilder();
        for (byte item : array) {
            sb2.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
        }
        return sb2.toString().toUpperCase();
    }
}

WxPayTool

import com.aliyun.oss.ServiceException;
import com.github.wxpay.sdk.WXPay;
import com.github.wxpay.sdk.WXPayUtil;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @Author: zyh
 * @CreateDate: 2020/6/20
 */
public class WxPayTool {

    /**
     * 回调地址
     */
    private static final String NOTIFY_URL = "http://47.93.85.82:8083/wxPay/notify";

    private static final String IP = "47.93.85.82";


    public static Map<String, String> wxPay(String money, String outTradeNo, String body,String attach,String uid ,String id) throws Exception {
        BigDecimal totalPrice = new BigDecimal(money);
        String totalFee = totalPrice.multiply(new BigDecimal(100)).toBigInteger().toString();
        OurWxConfig wxConfig = new OurWxConfig();
        WXPay wxPay = new WXPay(wxConfig);
        Map<String, String> param = new HashMap<>();
        param.put("appid", wxConfig.getAppID());
        param.put("mch_id",wxConfig.getMchID());

        //额外参数
        param.put("attach",attach);
        param.put("uid",uid);
        param.put("id",id);

        // 支付场景 APP 微信app支付 JSAPI 公众号支付  NATIVE 扫码支付
        param.put("trade_type","APP");

        // 回调地址
        param.put("notify_url", NOTIFY_URL);

        // 终端ip
        param.put("spbill_create_ip", IP);

        // 订单总金额
        param.put("total_fee",totalFee);

        // 默认人民币
        param.put("fee_type","CNY");

        // 交易订单号
        param.put("out_trade_no",outTradeNo);

        // 内容
        param.put("body",body);

        // 生成随机字符串
        param.put("nonce_str", WXPayUtil.generateNonceStr());

        //一次签名
        WxMD5Util md5Util = new WxMD5Util();
//        String oneSign = md5Util.getSign(param);
        String oneSign = WXPayUtil.generateSignature(param,wxConfig.getKey());
        param.put("sign",oneSign);

        /**
         * wxPay.unifiedOrder 这个方法中调用微信统一下单接口
         */
        Map<String, String> respData = wxPay.unifiedOrder(param);

        System.out.println();
        System.out.println("返回结果------" + respData.toString());
        System.out.println();

        if (respData.get("return_code").equals("SUCCESS")){
            //返回给APP端的参数，APP端再调起支付接口
            Map<String, String> res = new HashMap<>();
            res.put("appid",wxConfig.getAppID());
            res.put("noncestr",respData.get("nonce_str"));
            res.put("partnerid",wxConfig.getMchID());
            res.put("timestamp",String.valueOf(System.currentTimeMillis()/1000));
            res.put("package","Sign=WXPay");
            res.put("prepayid",respData.get("prepay_id"));

            //签名
            String sign = WXPayUtil.generateSignature(res, wxConfig.getKey());
            res.put("sign", sign);

            System.out.println("新的验签-----------" + sign);

            return res;
        }
        System.out.println("----------报错" + respData.get("return_msg"));
        throw new Exception(respData.get("return_msg"));
    }

    public static String wxNotify(HttpServletRequest request) {
        System.out.println("微信支付回调");
        try {
            // 读取参数
            // 解析xml成map
            Map<String, String> map = WXPayUtil.xmlToMap(getParam(request));
            System.out.println("微信支付回调返回的信息：" + map);
//            check(map);//该处读者自行校验（验证订单号，付款金额等是否正确）
            String orderNo = map.get("out_trade_no");
            String resultCode = map.get("result_code");
            // 另起线程处理业务
            System.out.println();
            System.out.println("另起线程处理业务");
            System.out.println();
            if (resultCode.equals("SUCCESS")) {
                return setXml("SUCCESS", "OK");
            } else {
                return setXml("fail", "付款失败");
            }
        } catch (ServiceException e) {
            return setXml("fail", "付款失败");
        } catch (Exception e) {
            System.out.println("微信支付回调发生异常：" + e.getLocalizedMessage());
            return setXml("fail", "付款失败");
        }

    }

    private static String getParam(HttpServletRequest request) throws IOException {
        // 读取参数
        InputStream inputStream;
        StringBuilder sb = new StringBuilder();
        inputStream = request.getInputStream();
        String s;
        BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
        while ((s = in.readLine()) != null) {
            sb.append(s);
        }
        in.close();
        inputStream.close();
        return sb.toString();
    }

    /**
     * 通过xml发给微信消息
     * @param return_code
     * @param return_msg
     * @return
     */
    private static String setXml(String return_code, String return_msg) {
        SortedMap<String, String> parameters = new TreeMap<>();
        parameters.put("return_code", return_code);
        parameters.put("return_msg", return_msg);
        try {
            return WXPayUtil.mapToXml(parameters);
        } catch (Exception e) {
            System.out.println("返回微信消息时map转xml失败");
            return " + return_code + "]]>" + " + return_msg
                    + "]]>";
        }
    }
}