实现微信支付wxpay

微信公众平台注册-申请微信支付

package com.cn.config;

import com.cn.controller.WXPayController;
import com.github.wxpay.sdk.WXPayUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
 * @Descripation 微信支付
 * @Date 2019-08-02 9:26
 * @since 1.0
 **/
public class WXUtils {


    private static final Logger logger = LoggerFactory.getLogger(WXPayController.class);

	//从你的微信平台获取
    private static final String appid = "";
    private static final String mch_id = " ";
    private static final String partnerkey = ""; //商户秘钥



    /* *
     * @Description 调用统一下单接口
     * param 1 商品订单号  2 total_fee 支付金额  订单号前端传,金额必须后端查  订单号32位
     */
    public static Map unifyPay(String out_trade_no, String total_fee) {
        String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        Map<String, String> param = new HashMap<>();
        param.put("appid", appid);
        param.put("mch_id", mch_id);
        String nonce_str = WXPayUtil.generateNonceStr();
        param.put("nonce_str", nonce_str);
        param.put("body", "");
        param.put("out_trade_no", out_trade_no);
        param.put("total_fee", total_fee);
        param.put("spbill_create_ip", "127.0.0.1");//随便写
        param.put("notify_url", "");//回调地址随便写
        param.put("trade_type", "NATIVE");
        Map<String, String> resultMap = null;
        try {
            String xmlParam = WXPayUtil.generateSignedXml(param, partnerkey);//生成带签名的xml
            logger.error("这是生成的xml:{}", xmlParam);
            String result = HttpUtils.postJsonRequest(url, xmlParam);
            resultMap = WXPayUtil.xmlToMap(result);
            logger.error("统一下单返回状态:{}", resultMap.get("return_code"));
            logger.error("统一下单返回信息:{}", resultMap.get("return_msg"));
            logger.error("二维码链接地址:{}", resultMap.get("code_url"));

        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultMap;

    }


    /* *
     * @Description 查询订单接口
     */
    public static Map<String, String> queryOrder(String out_trade_no) {
        String url = "https://api.mch.weixin.qq.com/pay/orderquery";
        Map<String, String> param = new HashMap<>();
        param.put("appid", appid);
        param.put("mch_id", mch_id);
        String nonce_str = WXPayUtil.generateNonceStr();
        param.put("nonce_str", nonce_str);
        param.put("out_trade_no", out_trade_no);
        Map<String, String> resultMap = null;
        try {
            String xmlParam = WXPayUtil.generateSignedXml(param, partnerkey);
            String result = HttpUtils.postJsonRequest(url, xmlParam);
            resultMap = WXPayUtil.xmlToMap(result);
            logger.error("查询订单返回状态:{}", resultMap.get("return_code"));
            logger.error("查询订单返回信息:{}", resultMap.get("return_msg"));
            logger.error("支付返回状态:{}", resultMap.get("trade_state"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultMap;
    }


}

HttpUtils有需要的可以从我的资源里下载

package com.cn.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

/**
 * @Descripation
 * @since 1.0
 **/
@RestController
@RequestMapping("/WXPay")
@CrossOrigin
@Api(description = "微信支付")
public class WXPayController {



    @RequestMapping(value = "/OrderWXPay", method = RequestMethod.POST)
    @ApiOperation("微信支付 参数 1 订单号 订单号必须32位  ")
    @ApiImplicitParams({
            @ApiImplicitParam("订单号")
    })
    public Object orderWXPay(String out_trade_no) {
        //根据订单号去数据库查询金额 如果查不到 说明订单号非法return
        //支付金额
        Double order_limit = payOrder.getOrder_limit();
        int order_money = (int) (order_limit * 100);
        String total_fee = String.valueOf(order_money);
        Map map = WXUtils.unifyPay(out_trade_no, total_fee);
        if ("SUCCESS".equals(map.get("return_code"))) {
            map.put("money", String.valueOf(order_limit));
            return ResultMsg.ResultMsg(map,200,"下单成功");
        }

        return ResultMsg.ResultMsg(null,500, "订单异常");

        }



    @RequestMapping(value = "/OrderWXPayStatus", method = RequestMethod.POST)
    @ApiOperation("微信支付状态 查询订单接口   参数 订单号 ")
    @ApiImplicitParams({
            @ApiImplicitParam("订单号")
    })
    public Object orderWXPayStatus(String out_trade_no) {
        ResultMsg rm = null;
        int num = 0;
        while (true) {
            Map<String, String> resultMap = WXUtils.queryOrder(out_trade_no);
            if (resultMap == null) {
                return ResultMsg.ResultMsg(false,100, "支付错误");
            }
            if (resultMap.get("trade_state").equals("SUCCESS")) {
				//成功后的逻辑
                return ResultMsg.ResultMsg(true,200, "支付成功");
            }
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            num++;
            if (num > 200) {
                return ResultMsg.ResultMsg(false,300, "支付超时");
            }
        }
    }


}