<!-- 生成二維碼工具 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.2.0</version> </dependency> <!-- 微信支付所需sdk --> <dependency> <groupId>com.github.wxpay</groupId> <artifactId>wxpay-sdk</artifactId> <version>0.0.3</version> </dependency>二、在application.yml文件配置微信所有需的基本配置1.導入

代碼如下（示例）：

# 服務器域名地址server: service-domain: //這里寫你的域名地址#微信app支付pay: wxpay: app: appID: 微信appid mchID: 商戶號 key: //這個key實在微信支付公眾品臺自己定義的key 要求36位 certPath: static/cert/wxpay/apiclient_cert.p12 # 從微信商戶平臺下載的安全證書存放的路徑、我放在resources下面,切記一定要看看target目錄下的class文件下有沒有打包apiclient_cert.p12文件 payNotifyUrl: # 微信支付成功的異步通知接口 這里引入你的回調接口。 //這里直接寫https://域名:端口/接口地址,注意一定是線上的接口，因為微信訪問不到你本地的接口2.創建MyWXPayConfig類引入配置信息

代碼如下（示例）：

package com.example.gasstation.config;import lombok.Data;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.stereotype.Component;import java.io.InputStream;@Data@Component@ConfigurationProperties(prefix = 'pay.wxpay.app')public class MyWXPayConfig implements WXPayConfig{ /** * appID */ private String appID; /** * 商戶號 */ private String mchID; /** * API 密鑰 */ private String key; /** * API證書絕對路徑 (本項目放在了 resources/cert/wxpay/apiclient_cert.p12') */ private String certPath; /** * HTTP(S) 連接超時時間，單位毫秒 */ private int httpConnectTimeoutMs = 8000; /** * HTTP(S) 讀數據超時時間，單位毫秒 */ private int httpReadTimeoutMs = 10000; /** * 微信支付異步通知地址 */ private String payNotifyUrl; /** * 微信退款異步通知地址 */ private String refundNotifyUrl; /** * 統一下單url */ private final String UNIFIED_ORDER_URL = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; /** 這里實現了一個service層**/ @Override public InputStream getCertStream() { InputStream certStream =getClass().getClassLoader().getResourceAsStream(certPath); return certStream; } //在同層級下面新建WXPayConfig service層 package com.example.gasstation.config; import java.io.InputStream; public interface WXPayConfig { InputStream getCertStream();//不要問我為啥不另起一行，因為我懶 }}三、引入 WxPayServiceImpl 實現類

package com.example.gasstation.server.impl;import com.example.gasstation.config.MyWXPayConfig;import com.example.gasstation.entity.Result;import com.example.gasstation.mapper.PayMapper;import com.example.gasstation.model.Money_transfer;import com.example.gasstation.model.Pay;import com.example.gasstation.server.WxPayService;import com.example.gasstation.util.HttpClientUtil;import com.example.gasstation.util.WXPayUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Map;import java.util.SortedMap;import java.util.TreeMap;@Servicepublic class WxPayServiceImpl implements WxPayService { @Autowired private MyWXPayConfig wxPayAppConfig; @Autowired private PayMapper payMapper; @Override public String save(String orderNo, double amount, String body,Integer uid) { SimpleDateFormat df = new SimpleDateFormat('yyyy-MM-dd HH:mm:ss');//設置日期格式 // 1. 生成訂單 // 訂單號，流水號，金額，付款狀態，創建時間 String product_id = WXPayUtils.generateUUID(); Pay pay = new Pay();//這里新建一個實體類 用處存入數據庫 pay.setTradeNo(product_id); pay.setOutTradeNo(orderNo); pay.setBody(body); pay.setPaystatus(1); pay.setUid(uid); pay.setTotalAmount(amount); pay.setGmtCreate(df.format(new Date())); pay.setTradeStatus('0'); pay.setAppId(wxPayAppConfig.getAppID()); // 生成預支付訂單，保存到數據庫 payMapper.insert(pay); // 調用統一下單方法，返回 codeUrl 地址 String codeUrl = unifiedOrder(product_id,orderNo,amount,body); return codeUrl; } private String unifiedOrder(String product_id, String orderNo, double amount, String body){ // 生成簽名 try{ SortedMap<String, String> params = new TreeMap<>(); params.put('appid',wxPayAppConfig.getAppID()); params.put('mch_id',wxPayAppConfig.getMchID()); params.put('nonce_str', WXPayUtils.generateUUID()); params.put('body',body); // 商品描述 params.put('out_trade_no',orderNo); // 商戶訂單號 params.put('total_fee',String.valueOf((int)(amount*100))); // 標價金額（單位為分） params.put('spbill_create_ip', '這里寫服務器IP'); // 終端IP params.put('notify_url', wxPayAppConfig.getPayNotifyUrl()); // 異步接收微信支付結果通知的回調地址 params.put('trade_type','NATIVE'); // 交易類型 params.put('product_id',product_id);// 微信支付要求NATIVE支付，此參數必填 // sign 簽名 String sign = WXPayUtils.createSign(params, wxPayAppConfig.getKey()); params.put('sign',sign); System.out.println(sign); // map轉xml String payXml = WXPayUtils.mapToXml(params); System.out.println(payXml); // 統一下單 String s = HttpClientUtil.doPost(wxPayAppConfig.getUNIFIED_ORDER_URL(), payXml, 10000); if(null == s){return null; } Map<String, String> unifiedOrderMap = WXPayUtils.xmlToMap(s); System.out.println(unifiedOrderMap.toString()); if(unifiedOrderMap != null){// 前臺添加定時器，進行輪詢操作，直到支付完畢return unifiedOrderMap.get('code_url'); } } catch (Exception e){ e.printStackTrace(); } return null; }}四、引入WxPayService層

package com.example.gasstation.server;import com.example.gasstation.model.Money_transfer;public interface WxPayService { String save(String orderNo, double amount, String body,Integer uid); boolean callBackPayUpdate(String outTradeNo,String totalFee);}五、引入Util類

package com.example.gasstation.util;import com.github.wxpay.sdk.WXPayUtil;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.w3c.dom.Document;import org.w3c.dom.Element;import javax.xml.parsers.DocumentBuilder;import javax.xml.transform.OutputKeys;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import java.io.ByteArrayInputStream;import java.io.InputStream;import java.io.StringWriter;import java.util.*;/** * @Author qjp */public class WXPayUtils { /** * XML格式字符串轉換為Map * * @param strXML XML字符串 * @return XML數據轉換后的Map * @throws Exception */ public static Map<String, String> xmlToMap(String strXML) throws Exception { try { Map<String, String> data = new HashMap<String, String>(); DocumentBuilder documentBuilder = WXPayXmlUtil.newDocumentBuilder(); InputStream stream = new ByteArrayInputStream(strXML.getBytes('UTF-8')); org.w3c.dom.Document doc = documentBuilder.parse(stream); doc.getDocumentElement().normalize(); NodeList nodeList = doc.getDocumentElement().getChildNodes(); for (int idx = 0; idx < nodeList.getLength(); ++idx) {Node node = nodeList.item(idx);if (node.getNodeType() == Node.ELEMENT_NODE) { org.w3c.dom.Element element = (org.w3c.dom.Element) node; data.put(element.getNodeName(), element.getTextContent());} } try {stream.close(); } catch (Exception ex) {// do nothing } return data; } catch (Exception ex) { WXPayUtils.getLogger().warn('Invalid XML, can not convert to map. Error message: {}. XML content: {}', ex.getMessage(), strXML); throw ex; } } /** * 將Map轉換為XML格式的字符串 * * @param data Map類型數據 * @return XML格式的字符串 * @throws Exception */ public static String mapToXml(Map<String, String> data) throws Exception { Document document = WXPayXmlUtil.newDocument(); Element root = document.createElement('xml'); document.appendChild(root); for (String key: data.keySet()) { String value = data.get(key); if (value == null) {value = ''; } value = value.trim(); Element filed = document.createElement(key); filed.appendChild(document.createTextNode(value)); root.appendChild(filed); } TransformerFactory tf = TransformerFactory.newInstance(); Transformer transformer = tf.newTransformer(); DOMSource source = new DOMSource(document); transformer.setOutputProperty(OutputKeys.ENCODING, 'UTF-8'); transformer.setOutputProperty(OutputKeys.INDENT, 'yes'); StringWriter writer = new StringWriter(); StreamResult result = new StreamResult(writer); transformer.transform(source, result); String output = writer.getBuffer().toString(); //.replaceAll('n|r', ''); try { writer.close(); } catch (Exception ex) { } return output; } /** * 生成微信支付sign */ public static String createSign(SortedMap<String, String> params, String key){ StringBuilder sb = new StringBuilder(); Set<Map.Entry<String, String>> es = params.entrySet(); Iterator<Map.Entry<String, String>> it = es.iterator(); while(it.hasNext()){ Map.Entry<String, String> entry = it.next(); String k = entry.getKey(); String v = entry.getValue(); if(null != v && !''.equals(v) && !'sign'.equals(k) && !'key'.equals(k)){sb.append(k + '=' + v + '&'); } } sb.append('key=').append(key); String sign = MD5Util.MD5(sb.toString()).toUpperCase(); return sign; } /** * 校驗簽名 * @param params * @param key * @return */ public static Boolean isCorrectSign(SortedMap<String, String> params, String key){ String sign = createSign(params, key); String wxPaySign = params.get('sign').toUpperCase(); return wxPaySign.equals(sign); } /** * 獲取有序map * @param map */ public static SortedMap<String, String> getSortedMap(Map<String, String> map){ SortedMap<String, String> sortedMap = new TreeMap<>(); Iterator<String> it = map.keySet().iterator(); while(it.hasNext()){ String key = it.next(); String value = map.get(key); String temp = ''; if(null != value){temp = value.trim(); } sortedMap.put(key, value); } return sortedMap; } /** * 日志 * @return */ public static Logger getLogger() { Logger logger = LoggerFactory.getLogger('wxpay java sdk'); return logger; } /** * 獲取當前時間戳，單位秒 * @return */ public static long getCurrentTimestamp() { return System.currentTimeMillis()/1000; } /** * 獲取當前時間戳，單位毫秒 * @return */ public static long getCurrentTimestampMs() { return System.currentTimeMillis(); } /** * 生成UUID(用來表示一筆訂單) * @return */ public static String generateUUID(){ String uuid = UUID.randomUUID().toString().replaceAll('-','').substring(0,32); return uuid; }}

引入WXPayXmlUtil類

package com.example.gasstation.util;import javax.xml.XMLConstants;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import org.w3c.dom.Document;public final class WXPayXmlUtil { public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException { DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance(); documentBuilderFactory.setFeature('http://apache.org/xml/features/disallow-doctype-decl', true); documentBuilderFactory.setFeature('http://xml.org/sax/features/external-general-entities', false); documentBuilderFactory.setFeature('http://xml.org/sax/features/external-parameter-entities', false); documentBuilderFactory.setFeature('http://apache.org/xml/features/nonvalidating/load-external-dtd', false); documentBuilderFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true); documentBuilderFactory.setXIncludeAware(false); documentBuilderFactory.setExpandEntityReferences(false); return documentBuilderFactory.newDocumentBuilder(); } public static Document newDocument() throws ParserConfigurationException { return newDocumentBuilder().newDocument(); }}六、引入WxPayController類

提示：到這里沒有報錯咱們已經成功一半啦

@RestController@RequestMapping('/wxPay')public class WxPayController { @Autowired private WxPayService wxPayService; @Autowired private MyWXPayConfig wxPayConfig; @Autowired private WebMvcConfigurer webMvcConfigurer; /** * 微信支付 生成二維碼 * * @param money * @return */ @GetMapping('/pay') public void wxPay(Double money,String body,Integer uid ,HttpServletResponse response){ Double amount = money;//金額 SimpleDateFormat date = new SimpleDateFormat('yyyyMMddHHmmss'); String orderNo = date.format(new Date()) + WXPayUtils.getCurrentTimestampMs(); String url_code = wxPayService.save(orderNo, amount, body,uid); System.out.println('url_code:----------'+url_code); if(url_code == null){ throw new NullPointerException(); } try { // 生成二維碼配置 Map<EncodeHintType, Object> hints = new HashMap<>(); // 設置糾錯等級 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); // 編碼類型 hints.put(EncodeHintType.CHARACTER_SET, 'UTF-8'); BitMatrix bitMatrix = new MultiFormatWriter().encode(url_code, BarcodeFormat.QR_CODE, 400, 400, hints); OutputStream outputStream = response.getOutputStream(); MatrixToImageWriter.writeToStream(bitMatrix, 'png', outputStream); } catch (Exception e){ e.printStackTrace(); } } /** * 微信支付回調接口 */ @RequestMapping('/callback') public void OrderCallBack(HttpServletRequest request, HttpServletResponse response) { InputStream inputStream = null; try { inputStream = request.getInputStream(); // BufferedReader是包裝設計模式，性能更高 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, 'UTF-8')); StringBuffer stringBuffer = new StringBuffer(); String line; while ((line = bufferedReader.readLine()) != null) {stringBuffer.append(line); } bufferedReader.close(); inputStream.close(); Map<String, String> callBackMap = WXPayUtils.xmlToMap(stringBuffer.toString()); System.out.println(callBackMap.toString()); SortedMap<String, String> sortedMap = WXPayUtils.getSortedMap(callBackMap); // 校驗簽名是否正確 if (WXPayUtils.isCorrectSign(sortedMap, wxPayConfig.getKey())) {System.out.println('簽名校驗成功！');// 更新訂單狀態if ('SUCCESS'.equals(sortedMap.get('result_code'))) { String outTradeNo = sortedMap.get('out_trade_no'); // 流水號 String totalFee = sortedMap.get('total_fee'); // 交易金額 if (wxPayService.callBackPayUpdate(outTradeNo, totalFee)) { // 通知微信訂單處理成功 response.setContentType('text/xml'); response.setContentType('content-type'); response.getWriter().println('<xml> <return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg> </xml>'); //這里說明告訴微信你已經成功啦，別給老子重復回調我的方法啦，這里有一個坑， response.setContentType('text/xml'); response.getWriter().println('SUCCESS') //本身我就只有這兩句話，然后就導致微信一直回調我的方法，廢了半天的勁才搞好啦， //原因就是格式不對，給他返回的值他不認識，這里可以看一下微信的支付開發文檔，雖然文檔寫的很垃圾 }}// 未成功，就都處理為失敗訂單response.setContentType('text/html');response.getWriter().println('fail'); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } }七、MD5加密

@Slf4jpublic class MD5Util { public static String MD5(String source) { return encodeMd5(source.getBytes()); } private static String encodeMd5(byte[] source) { try { return encodeHex(MessageDigest.getInstance('MD5').digest(source)); } catch (NoSuchAlgorithmException e) { throw new IllegalStateException(e.getMessage(), e); } } private static String encodeHex(byte[] bytes) { StringBuffer buffer = new StringBuffer(bytes.length * 2); for (int i = 0; i < bytes.length; i++) { if(((int) bytes[i] & 0xff) < 0x10) {buffer.append('0'); } buffer.append(Long.toString((int) bytes[i] & 0xff, 16)); } return buffer.toString(); }}總結

有什么不對的地方歡迎各位碼友指出問題，因為我也是第一次做這個微信掃碼支付回調方法返回類型是void 你設置其他返回類型，就會跟你 給微信返的起沖突，就會導致報錯

到此這篇關于SpringBoot微信掃碼支付的實現示例的文章就介紹到這了,更多相關SpringBoot微信掃碼支付內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！