JAVA實現微信掃碼支付回調Demo

掃碼效果演示圖

項目結構圖:

微信實現JAVA掃碼支付的Demo源碼，做這個做的很辛苦，熬夜了幾個晚上才把支付和回調做好的，在這裏貼一下相關代碼，以免更多開發者避免遇到這些坑，有不動的問題可以加我Q76949433，提供技術支持
package com.pay.common;

public class WxPayConfig {

public static String wxAppId="wsexbd6b2dgd23c841";

public static String wxappStrect="79ch22dsss71gbds5debe8d5c79e";

public static String wxMerchantNo="1523132d21";

public static String wxApiKey="ae12d0fgd3293df7aa1d606q228d91";

public static String notifyUrl ="http://test.pay.sucaiku.xin/wxPayNotifySevlet";

}

package com.pay.servlet;

import java.io.IOException;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.jpay.ext.kit.IpKit;
import com.jpay.ext.kit.PaymentKit;
import com.jpay.ext.kit.StrKit;
import com.jpay.weixin.api.WxPayApi;
import com.jpay.weixin.api.WxPayApi.TradeType;
import com.jpay.weixin.api.WxPayApiConfig;
import com.jpay.weixin.api.WxPayApiConfig.PayModel;
import com.jpay.weixin.api.WxPayApiConfigKit;
import com.pay.common.WxPayConfig;
import com.pay.util.MoneyUtil;

/**

微信公衆號支付
*/
public class WxPayMpServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

private ServletConfig config;

Random rand = new Random();

public void init(ServletConfig config) throws ServletException {
this.config = config;
}

public WxPayMpServlet() {
super();
}

protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

 String openId = "";

 // 訂單金額
 String total_fee = "0.01";
 // 訂單號
 String outTradeNo = "D";
 for (int i = 0; i < 10; i++) {
 	outTradeNo += rand.nextInt(10);
 }

 if (StrKit.isBlank(total_fee)) {
 	System.out.println("支付金額不能爲空");
 	return;
 }

 String ip = IpKit.getRealIp(request);
 if (StrKit.isBlank(ip)) {
 	ip = "127.0.0.1";
 }

 WxPayApiConfig wxPayApiConfig = WxPayApiConfig.New();

 // 微信公衆號id
 wxPayApiConfig.setAppId(WxPayConfig.wxAppId);
 // 微信商戶號
 wxPayApiConfig.setMchId(WxPayConfig.wxMerchantNo);
 // 微信商戶支付密鑰
 wxPayApiConfig.setPaternerKey(WxPayConfig.wxApiKey);
 // IP
 wxPayApiConfig.setSpbillCreateIp(ip);
 // 交易類型 掃碼支付
 wxPayApiConfig.setTradeType(TradeType.JSAPI);
 wxPayApiConfig.setOpenId(openId);
 // 回調地址
 wxPayApiConfig.setNotifyUrl(WxPayConfig.notifyUrl);
 // 訂單號 不可重複
 wxPayApiConfig.setOutTradeNo(outTradeNo);
 // 訂單金額
 wxPayApiConfig.setTotalFee(MoneyUtil.getMoney(total_fee));
 // 備註
 wxPayApiConfig.setBody("商品購買");
 // 支付模式 商戶模式（自簽約不可更改）
 wxPayApiConfig.setPayModel(PayModel.BUSINESSMODEL);
 WxPayApiConfigKit.putApiConfig(wxPayApiConfig);
 Map<String, String> params = WxPayApiConfigKit.getWxPayApiConfig().build();

 // ************************參數組裝完畢開始發起支付*********************************//

 String xmlResult = WxPayApi.pushOrder(false, params);

 Map<String, String> result = PaymentKit.xmlToMap(xmlResult);

 String return_code = result.get("return_code");
 String return_msg = result.get("return_msg");
 if (!PaymentKit.codeIsOK(return_code)) {
 	System.out.println(return_msg);
 	return;
 }
 String result_code = result.get("result_code");
 if (!PaymentKit.codeIsOK(result_code)) {
 	System.out.println(return_msg);
 	return;
 }

 System.out.println(result.toString());

}

}
package com.pay.servlet;

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.jpay.ext.kit.HttpKit;
import com.jpay.ext.kit.PaymentKit;
import com.jpay.weixin.api.WxPayApiConfigKit;

/**

微信回調
@author Administrator

*/
public class WxPayNotifySevlet extends HttpServlet {
private static final long serialVersionUID = 1L;

public WxPayNotifySevlet() {
	super();
	// TODO Auto-generated constructor stub
}

protected void service(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {
	// 支付結果通用通知文檔:https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=9_7&index=8
	String xmlMsg = HttpKit.readData(request);
	System.err.println("收到微信支付回調通知=" + xmlMsg);
	Map<String, String> params = PaymentKit.xmlToMap(xmlMsg);
	 String appid = params.get("appid");
	 //商戶號
	 String mch_id = params.get("mch_id");
	String result_code = params.get("result_code");
	 String openId = params.get("openid");
	 //交易類型
	 String trade_type = params.get("trade_type");
	 //付款銀行
	 String bank_type = params.get("bank_type");
	 // 總金額
	String money = params.get("total_fee");
	 //現金支付金額
	 String cash_fee = params.get("cash_fee");
	 // 微信支付訂單號
	String transactionId = params.get("transaction_id");
	// // 商戶訂單號
	String outTradeNo = params.get("out_trade_no");
	// // 支付完成時間，格式爲yyyyMMddHHmmss
	// String time_end = params.get("time_end");
	///////////////////////////// 以下是附加參數///////////////////////////////////
	String type = params.get("attach");
	 String fee_type = params.get("fee_type");
	 String is_subscribe = params.get("is_subscribe");
	 String err_code = params.get("err_code");
	 String err_code_des = params.get("err_code_des");
	if (PaymentKit.verifyNotify(params, WxPayApiConfigKit.getWxPayApiConfig().getPaternerKey())) {
		if (("SUCCESS").equals(result_code)) {
			//自行實現
			
			package com.pay.servlet;

import java.io.IOException;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.hutool.core.io.FileUtil;
import cn.hutool.extra.qrcode.QrCodeUtil;

/**

微信掃碼支付
*/
@WebServlet("/WxPayServlet")
public class WxPayServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

private ServletConfig config;

Random rand = new Random();

public void init(ServletConfig config) throws ServletException {
this.config = config;
}

public WxPayServlet() {
super();
}

protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 網站根目錄
String rootPath = config.getServletContext().getRealPath("/");

 //訂單金額
 String total_fee = "0.01";
 //訂單號
 String outTradeNo = "D";
 for (int i = 0; i < 10; i++) {
 	outTradeNo += rand.nextInt(10);
 }

 if (StrKit.isBlank(total_fee)) {
 	System.out.println("支付金額不能爲空");
 	return;
 }

 String ip = IpKit.getRealIp(request);
 if (StrKit.isBlank(ip)) {
 	ip = "127.0.0.1";
 }

 WxPayApiConfig wxPayApiConfig = WxPayApiConfig.New();

 // 微信公衆號id
 wxPayApiConfig.setAppId(WxPayConfig.wxAppId);
 // 微信商戶號
 wxPayApiConfig.setMchId(WxPayConfig.wxMerchantNo);
 // 微信商戶支付密鑰
 wxPayApiConfig.setPaternerKey(WxPayConfig.wxApiKey);
 // IP
 wxPayApiConfig.setSpbillCreateIp(ip);
 // 交易類型 掃碼支付
 wxPayApiConfig.setTradeType(TradeType.NATIVE);
 // 回調地址
 wxPayApiConfig.setNotifyUrl(WxPayConfig.notifyUrl);
 // 訂單號 不可重複
 wxPayApiConfig.setOutTradeNo(outTradeNo);
 // 訂單金額
 wxPayApiConfig.setTotalFee(MoneyUtil.getMoney(total_fee));
 // 備註
 wxPayApiConfig.setBody("商品購買");
 // 支付模式 商戶模式（自簽約不可更改）
 wxPayApiConfig.setPayModel(PayModel.BUSINESSMODEL);
 WxPayApiConfigKit.putApiConfig(wxPayApiConfig);
 Map<String, String> params = WxPayApiConfigKit.getWxPayApiConfig().build();

 // ************************參數組裝完畢開始發起支付*********************************//

 String xmlResult = WxPayApi.pushOrder(false, params);

 Map<String, String> result = PaymentKit.xmlToMap(xmlResult);

 String return_code = result.get("return_code");
 String return_msg = result.get("return_msg");
 if (!PaymentKit.codeIsOK(return_code)) {
 	System.out.println(return_msg);
 	return;
 }
 String result_code = result.get("result_code");
 if (!PaymentKit.codeIsOK(result_code)) {
 	System.out.println(return_msg);
 	return;
 }
 
 // 微信預支付訂單生產成功 獲取二維碼url
 String qrCodeUrl = result.get("code_url");

 QrCodeUtil.generate(qrCodeUrl, 300, 300, FileUtil.file(rootPath + "/wxPayCode/" + outTradeNo + ".png"));
 
 request.setAttribute("codeUrl", outTradeNo);

 request.getRequestDispatcher("/pay/wxpay.jsp").forward(request, response);

}

		}
	}

}

}
package com.pay.util;

public class MoneyUtil {

public static String getMoney(String amount) {
	if (amount == null) {
		return "";
	}
	// 金額轉化爲分爲單位
	String currency = amount.replaceAll("\\$|\\￥|\\,", ""); // 處理包含, ￥
															// 或者$的金額
	int index = currency.indexOf(".");
	int length = currency.length();
	Long amLong = 0l;
	if (index == -1) {
		amLong = Long.valueOf(currency + "00");
	} else if (length - index >= 3) {
		amLong = Long.valueOf((currency.substring(0, index + 3)).replace(".", ""));
	} else if (length - index == 2) {
		amLong = Long.valueOf((currency.substring(0, index + 2)).replace(".", "") + 0);
	} else {
		amLong = Long.valueOf((currency.substring(0, index + 1)).replace(".", "") + "00");
	}
	return amLong.toString();
}

}
<%@ page language=“java” import=“java.util.*” pageEncoding=“ISO-8859-1”%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"😕/"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

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