微信支付之微信统一下单接口接入
不管是学习一门新的技术还是使用他人接口的时候最好的方式就是先看官方的文档，所以在使用微信支付的统一下单最好先看一下官方的文档
https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_
首先导入依赖
org.apache.httpcomponents
httpclient
4.5.3
org.slf4j
slf4j-api
1.7.21
org.slf4j
slf4j-simple
1.7.21
二维码依赖
com.google.zxing
core
3.3.0
封装一个参数工具类和参数获取类
public class WeixinPayConfig {
//这几个参数是必要的，其他参数可视业务情况添加
public static final String appid=公众号id（微信开放平台审核通过的应用APPID）
public static final String mch_id=商户号（微信支付分配的商户号）
public static final String url="https://api.mch.weixin.qq.com/pay/unifiedorder";//支付请求地址
public static final String notify_url=通知地址（异步接收微信支付结果通知的回调地址，地址是可以进行外网访问的）
public static final String key=商户key【api密钥】
}
public class WXPayConfigImpl extends WXPayConfig {
private String key= WeixinPayConfig.key;
/**
* 获取 App ID
*
* @return App ID
*/
public String getAppID() {
return WeixinPayConfig.appid;
}
/**
* 获取 Mch ID
*商户号
* @return Mch ID
*/
public String getMchID() {
return WeixinPayConfig.mch_id;
}
/**
* 获取 API 密钥
*
* @return API密钥
*/
public String getKey() {
return key;
}
/**
* 获取商户证书内容
*
* @return 商户证书内容
*/
public InputStream getCertStream() {
return this.getClass().getResourceAsStream("apiclient_cert.p12");
}
}
在调用统一下单之前保存订单最好不好在微信统一下单的接口里面保存
@RequestMapping("/insertOrder")
@ResponseBody
public String insertOrer(HttpServletRequest request, Order order,String personPhone){
//获取订单号
Date date=new Date();
SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");//年月日时分秒
order.setOrderId(sdf.from(date))；
//插入订单表
Order getOrder= orderService.insertOrder(order);
return getOrder.getOrderId();
}
统一下单接口
@RequestMapping("/WeChat")
public void WeChat(HttpServletRequest request,HttpServletResponse response,String orderId){
//根据订单号查询订单信息
Order order=orderService.selectOrderId(orderId);
Map map=new HashMap();
map.put("appid", WeixinPayConfig.appid);//公众账号ID
map.put("mch_id",WeixinPayConfig.mch_id);//商户号
// map.put("device_info",WeixinPayConfig.device_info);//设备号
// map.put("nonce_str",DateUtil.generateNonceStr());
map.put("nonce_str", WXPayUtil.generateNonceStr());//随机字符串
map.put("notify_url",WeixinPayConfig.notify_url);//通知地址（异步接收微信支付结果通知的回调地址）
map.put("trade_type","NATIVE");//交易类型
map.put("out_trade_no",order.getOrderId());//订单号
map.put("body",order.getBody());//商品描述
//这里微信的单位是分所以需要乘上100
map.put("total_fee",(order.getPrice().multiply(new BigDecimal(100))).toString());//商品价格
map.put("spbill_create_ip", weixinUtil.getRemortIP(request));//终端IP
try {
//生成签名（这里使用的是HMACSHA256加密方式，注意你这里使用了什么加密方式那么你微信回调方法的解密也要使用相同的加密方式）
map.put("sign",WXPayUtil.generateSignature(map,WeixinPayConfig.key, WXPayConstants.SignType.HMACSHA256));
WXPayConfigImpl config = new WXPayConfigImpl();
//这里有个坑，你要是使用了微信demo的工具包你这里不指定的话那这里是HMACSHA256,
//你回调的验证时候需要指定为HMACSHA256加密
WXPay pay = new WXPay(config);//加密方式为HMACSHA256
//向微信发送请求
Map map2 = pay.unifiedOrder(map);
System.out.println("aaa-"+map2);
获得二维码地址
String code_url=map2.get("code_url");//二维码地址
QRCodeUtil.encode(code_url, response.getOutputStream());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
微信的一些工具类大部分的方法是微信demo里面的
package com.vodofo.swms.pay.weixin;
import com.vodofo.swms.pay.weixin.WXPayConstants.SignType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
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.security.MessageDigest;
import java.security.SecureRandom;
import java.util.*;
public class WXPayUtil {
private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
private static final Random RANDOM = new SecureRandom();
/**
* XML格式字符串转换为Map
*
* @param strXML XML字符串
* @return XML数据转换后的Map
* @throws Exception
*/
public static Map xmlToMap(String strXML) throws Exception {
try {
Map data = new HashMap();
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) {
WXPayUtil.getLogger().warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML);
throw ex;
}
}
/**
* 将Map转换为XML格式的字符串
*
* @param data Map类型数据
* @return XML格式的字符串
* @throws Exception
*/
public static String mapToXml(Map data) throws Exception {
org.w3c.dom.Document document = WXPayXmlUtil.newDocument();
org.w3c.dom.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();
org.w3c.dom.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;
}
/**
* 生成带有 sign 的 XML 格式字符串
*
* @param data Map类型数据
* @param key API密钥
* @return 含有sign字段的XML
*/
public static String generateSignedXml(final Map data, String key) throws Exception {
return generateSignedXml(data, key, SignType.MD5);
}
/**
* 生成带有 sign 的 XML 格式字符串
*
* @param data Map类型数据
* @param key API密钥
* @param signType 签名类型
* @return 含有sign字段的XML
*/
public static String generateSignedXml(final Map data, String key, SignType signType) throws Exception {
String sign = generateSignature(data, key, signType);
data.put(WXPayConstants.FIELD_SIGN, sign);
return mapToXml(data);
}
/**
* 判断签名是否正确
*
* @param xmlStr XML格式数据
* @param key API密钥
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(String xmlStr, String key) throws Exception {
Map data = xmlToMap(xmlStr);
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key).equals(sign);
}
/**
* 判断签名是否正确，必须包含sign字段，否则返回false。使用MD5签名。
*
* @param data Map类型数据
* @param key API密钥
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(Map data, String key) throws Exception {
return isSignatureValid(data, key, SignType.MD5);
}
/**
* 判断签名是否正确，必须包含sign字段，否则返回false。
*
* @param data Map类型数据
* @param key API密钥
* @param signType 签名方式
* @return 签名是否正确
* @throws Exception
*/
public static boolean isSignatureValid(Map data, String key, SignType signType) throws Exception {
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key, signType).equals(sign);
}
/**
* 生成签名
*
* @param data 待签名数据
* @param key API密钥
* @return 签名
*/
public static String generateSignature(final Map data, String key) throws Exception {
return generateSignature(data, key, SignType.MD5);
}
/**
* 生成签名. 注意，若含有sign_type字段，必须和signType参数保持一致。
*
* @param data 待签名数据
* @param key API密钥
* @param signType 签名方式
* @return 签名
*/
public static String generateSignature(final Map data, String key, SignType signType) throws Exception {
Set 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(key);
if (SignType.MD5.equals(signType)) {
return MD5(sb.toString()).toUpperCase();
}
else if (SignType.HMACSHA256.equals(signType)) {
return HMACSHA256(sb.toString(), key);
}
else {
throw new Exception(String.format("Invalid sign_type: %s", signType));
}
}
/**
* 获取随机字符串 Nonce Str
*
* @return String 随机字符串
*/
public static String generateNonceStr() {
char[] nonceChars = new char[32];
for (int index = 0; index < nonceChars.length; ++index) {
nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));
}
return new String(nonceChars);
}
/**
* 生成 MD5
*
* @param data 待处理数据
* @return MD5结果
*/
public static String MD5(String data) throws Exception {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] array = md.digest(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
/**
* 生成 HMACSHA256
* @param data 待处理数据
* @param key 密钥
* @return 加密结果
* @throws Exception
*/
public static String HMACSHA256(String data, String key) throws Exception {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
sha256_HMAC.init(secret_key);
byte[] array = sha256_HMAC.doFinal(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
/**
* 日志
* @return
*/
public static Logger getLogger() {
Logger logger = LoggerFactory.getLogger("wxpay java sdk");
return logger;
}
/**
* 获取当前时间戳，单位秒
* @return
*/
public static long getCurrentTimestamp() {
return System.currentTimeMillis()/1000;
}
/**
* 获取当前时间戳，单位毫秒
* @return
*/
public static long getCurrentTimestampMs() {
return System.currentTimeMillis();
}
}
微信支付请求的工具类
package com.vodofo.swms.pay.weixin;
import com.vodofo.swms.pay.weixin.WXPayConstants.SignType;
import java.util.HashMap;
import java.util.Map;
public class WXPay {
private WXPayConfig config;
private SignType signType;
private boolean autoReport;
private boolean useSandbox;
private String notifyUrl;
private WXPayRequest wxPayRequest;
public WXPay(final WXPayConfig config) throws Exception {
this(config, null, true, false);
}
public WXPay(final WXPayConfig config, final boolean autoReport) throws Exception {
this(config, null, autoReport, false);
}
public WXPay(final WXPayConfig config, final boolean autoReport, final boolean useSandbox) throws Exception{
this(config, null, autoReport, useSandbox);
}
public WXPay(final WXPayConfig config, final String notifyUrl) throws Exception {
this(config, notifyUrl, true, false);
}
public WXPay(final WXPayConfig config, final String notifyUrl, final boolean autoReport) throws Exception {
this(config, notifyUrl, autoReport, false);
}
public WXPay(final WXPayConfig config, final String notifyUrl, final boolean autoReport, final boolean useSandbox) throws Exception {
this.config = config;
this.notifyUrl = notifyUrl;
this.autoReport = autoReport;
this.useSandbox = useSandbox;
if (useSandbox) {
this.signType = SignType.MD5; // 沙箱环境
}
else {
this.signType = SignType.HMACSHA256;
}
this.wxPayRequest = new WXPayRequest(config);
}
private void checkWXPayConfig() throws Exception {
if (this.config == null) {
throw new Exception("config is null");
}
if (this.config.getAppID() == null || this.config.getAppID().trim().length() == 0) {
throw new Exception("appid in config is empty");
}
if (this.config.getMchID() == null || this.config.getMchID().trim().length() == 0) {
throw new Exception("appid in config is empty");
}
if (this.config.getCertStream() == null) {
throw new Exception("cert stream in config is empty");
}
if (this.config.getWXPayDomain() == null){
throw new Exception("config.getWXPayDomain() is null");
}
if (this.config.getHttpConnectTimeoutMs() < 10) {
throw new Exception("http connect timeout is too small");
}
if (this.config.getHttpReadTimeoutMs() < 10) {
throw new Exception("http read timeout is too small");
}
}
/**
* 向 Map 中添加 appid、mch_id、nonce_str、sign_type、sign
* 该函数适用于商户适用于统一下单等接口，不适用于红包、代金券接口
*
* @param reqData
* @return
* @throws Exception
*/
public Map fillRequestData(Map reqData) throws Exception {
reqData.put("appid", config.getAppID());
reqData.put("mch_id", config.getMchID());
reqData.put("nonce_str", WXPayUtil.generateNonceStr());
if (SignType.MD5.equals(this.signType)) {
reqData.put("sign_type", WXPayConstants.MD5);
}
else if (SignType.HMACSHA256.equals(this.signType)) {
reqData.put("sign_type", WXPayConstants.HMACSHA256);
}
reqData.put("sign", WXPayUtil.generateSignature(reqData, config.getKey(), this.signType));
return reqData;
}
/**
* 判断xml数据的sign是否有效，必须包含sign字段，否则返回false。
*
* @param reqData 向wxpay post的请求数据
* @return 签名是否有效
* @throws Exception
*/
public boolean isResponseSignatureValid(Map reqData) throws Exception {
// 返回数据的签名方式和请求中给定的签名方式是一致的
return WXPayUtil.isSignatureValid(reqData, this.config.getKey(), this.signType);
}
/**
* 判断支付结果通知中的sign是否有效
*
* @param reqData 向wxpay post的请求数据
* @return 签名是否有效
* @throws Exception
*/
public boolean isPayResultNotifySignatureValid(Map reqData) throws Exception {
String signTypeInData = reqData.get(WXPayConstants.FIELD_SIGN_TYPE);
SignType signType;
if (signTypeInData == null) {
signType = SignType.MD5;
}
else {
signTypeInData = signTypeInData.trim();
if (signTypeInData.length() == 0) {
signType = SignType.MD5;
}
else if (WXPayConstants.MD5.equals(signTypeInData)) {
signType = SignType.MD5;
}
else if (WXPayConstants.HMACSHA256.equals(signTypeInData)) {
signType = SignType.HMACSHA256;
}
else {
throw new Exception(String.format("Unsupported sign_type: %s", signTypeInData));
}
}
return WXPayUtil.isSignatureValid(reqData, this.config.getKey(), signType);
}
/**
* 不需要证书的请求
* @param urlSuffix String
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 超时时间，单位是毫秒
* @param readTimeoutMs 超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public String requestWithoutCert(String urlSuffix, Map reqData,
int connectTimeoutMs, int readTimeoutMs) throws Exception {
String msgUUID = reqData.get("nonce_str");
String reqBody = WXPayUtil.mapToXml(reqData);
String resp = this.wxPayRequest.requestWithoutCert(urlSuffix, msgUUID, reqBody, connectTimeoutMs, readTimeoutMs, autoReport);
return resp;
}
/**
* 需要证书的请求
* @param urlSuffix String
* @param reqData 向wxpay post的请求数据 Map
* @param connectTimeoutMs 超时时间，单位是毫秒
* @param readTimeoutMs 超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public String requestWithCert(String urlSuffix, Map reqData,
int connectTimeoutMs, int readTimeoutMs) throws Exception {
String msgUUID= reqData.get("nonce_str");
String reqBody = WXPayUtil.mapToXml(reqData);
String resp = this.wxPayRequest.requestWithCert(urlSuffix, msgUUID, reqBody, connectTimeoutMs, readTimeoutMs, this.autoReport);
return resp;
}
/**
* 处理 HTTPS API返回数据，转换成Map对象。return_code为SUCCESS时，验证签名。
* @param xmlStr API返回的XML格式数据
* @return Map类型数据
* @throws Exception
*/
public Map processResponseXml(String xmlStr) throws Exception {
String RETURN_CODE = "return_code";
String return_code;
Map respData = WXPayUtil.xmlToMap(xmlStr);
if (respData.containsKey(RETURN_CODE)) {
return_code = respData.get(RETURN_CODE);
}
else {
throw new Exception(String.format("No `return_code` in XML: %s", xmlStr));
}
if (return_code.equals(WXPayConstants.FAIL)) {
return respData;
}
else if (return_code.equals(WXPayConstants.SUCCESS)) {
if (this.isResponseSignatureValid(respData)) {
return respData;
}
else {
throw new Exception(String.format("Invalid sign value in XML: %s", xmlStr));
}
}
else {
throw new Exception(String.format("return_code value %s is invalid in XML: %s", return_code, xmlStr));
}
}
/**
* 作用：提交刷卡支付
* 场景：刷卡支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map microPay(Map reqData) throws Exception {
return this.microPay(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：提交刷卡支付
* 场景：刷卡支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map microPay(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_MICROPAY_URL_SUFFIX;
}
else {
url = WXPayConstants.MICROPAY_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 提交刷卡支付，针对软POS，尽可能做成功
* 内置重试机制，最多60s
* @param reqData
* @return
* @throws Exception
*/
public Map microPayWithPos(Map reqData) throws Exception {
return this.microPayWithPos(reqData, this.config.getHttpConnectTimeoutMs());
}
/**
* 提交刷卡支付，针对软POS，尽可能做成功
* 内置重试机制，最多60s
* @param reqData
* @param connectTimeoutMs
* @return
* @throws Exception
*/
public Map microPayWithPos(Map reqData, int connectTimeoutMs) throws Exception {
int remainingTimeMs = 60*1000;
long startTimestampMs = 0;
Map lastResult = null;
Exception lastException = null;
while (true) {
startTimestampMs = WXPayUtil.getCurrentTimestampMs();
int readTimeoutMs = remainingTimeMs - connectTimeoutMs;
if (readTimeoutMs > 1000) {
try {
lastResult = this.microPay(reqData, connectTimeoutMs, readTimeoutMs);
String returnCode = lastResult.get("return_code");
if (returnCode.equals("SUCCESS")) {
String resultCode = lastResult.get("result_code");
String errCode = lastResult.get("err_code");
if (resultCode.equals("SUCCESS")) {
break;
}
else {
// 看错误码，若支付结果未知，则重试提交刷卡支付
if (errCode.equals("SYSTEMERROR") || errCode.equals("BANKERROR") || errCode.equals("USERPAYING")) {
remainingTimeMs = remainingTimeMs - (int)(WXPayUtil.getCurrentTimestampMs() - startTimestampMs);
if (remainingTimeMs <= 100) {
break;
}
else {
WXPayUtil.getLogger().info("microPayWithPos: try micropay again");
if (remainingTimeMs > 5*1000) {
Thread.sleep(5*1000);
}
else {
Thread.sleep(1*1000);
}
continue;
}
}
else {
break;
}
}
}
else {
break;
}
}
catch (Exception ex) {
lastResult = null;
lastException = ex;
}
}
else {
break;
}
}
if (lastResult == null) {
throw lastException;
}
else {
return lastResult;
}
}
/**
* 作用：统一下单
* 场景：公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map unifiedOrder(Map reqData) throws Exception {
return this.unifiedOrder(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：统一下单
* 场景：公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map unifiedOrder(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_UNIFIEDORDER_URL_SUFFIX;
}
else {
url = WXPayConstants.UNIFIEDORDER_URL_SUFFIX;
}
if(this.notifyUrl != null) {
reqData.put("notify_url", this.notifyUrl);
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：查询订单
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map orderQuery(Map reqData) throws Exception {
return this.orderQuery(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：查询订单
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据 int
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map orderQuery(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_ORDERQUERY_URL_SUFFIX;
}
else {
url = WXPayConstants.ORDERQUERY_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：撤销订单
* 场景：刷卡支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map reverse(Map reqData) throws Exception {
return this.reverse(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：撤销订单
* 场景：刷卡支付
* 其他：需要证书
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map reverse(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_REVERSE_URL_SUFFIX;
}
else {
url = WXPayConstants.REVERSE_URL_SUFFIX;
}
String respXml = this.requestWithCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：关闭订单
* 场景：公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map closeOrder(Map reqData) throws Exception {
return this.closeOrder(reqData, config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：关闭订单
* 场景：公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map closeOrder(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_CLOSEORDER_URL_SUFFIX;
}
else {
url = WXPayConstants.CLOSEORDER_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：申请退款
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map refund(Map reqData) throws Exception {
return this.refund(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：申请退款
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* 其他：需要证书
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map refund(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_REFUND_URL_SUFFIX;
}
else {
url = WXPayConstants.REFUND_URL_SUFFIX;
}
String respXml = this.requestWithCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：退款查询
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map refundQuery(Map reqData) throws Exception {
return this.refundQuery(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：退款查询
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map refundQuery(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_REFUNDQUERY_URL_SUFFIX;
}
else {
url = WXPayConstants.REFUNDQUERY_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：对账单下载（成功时返回对账单数据，失败时返回XML格式数据）
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map downloadBill(Map reqData) throws Exception {
return this.downloadBill(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：对账单下载
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* 其他：无论是否成功都返回Map。若成功，返回的Map中含有return_code、return_msg、data，
* 其中return_code为`SUCCESS`，data为对账单数据。
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return 经过封装的API返回数据
* @throws Exception
*/
public Map downloadBill(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_DOWNLOADBILL_URL_SUFFIX;
}
else {
url = WXPayConstants.DOWNLOADBILL_URL_SUFFIX;
}
String respStr = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs).trim();
Map ret;
// 出现错误，返回XML数据
if (respStr.indexOf("<") == 0) {
ret = WXPayUtil.xmlToMap(respStr);
}
else {
// 正常返回csv数据
ret = new HashMap();
ret.put("return_code", WXPayConstants.SUCCESS);
ret.put("return_msg", "ok");
ret.put("data", respStr);
}
return ret;
}
/**
* 作用：交易保障
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map report(Map reqData) throws Exception {
return this.report(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：交易保障
* 场景：刷卡支付、公共号支付、扫码支付、APP支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map report(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_REPORT_URL_SUFFIX;
}
else {
url = WXPayConstants.REPORT_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return WXPayUtil.xmlToMap(respXml);
}
/**
* 作用：转换短链接
* 场景：刷卡支付、扫码支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map shortUrl(Map reqData) throws Exception {
return this.shortUrl(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：转换短链接
* 场景：刷卡支付、扫码支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map shortUrl(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_SHORTURL_URL_SUFFIX;
}
else {
url = WXPayConstants.SHORTURL_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
/**
* 作用：授权码查询OPENID接口
* 场景：刷卡支付
* @param reqData 向wxpay post的请求数据
* @return API返回数据
* @throws Exception
*/
public Map authCodeToOpenid(Map reqData) throws Exception {
return this.authCodeToOpenid(reqData, this.config.getHttpConnectTimeoutMs(), this.config.getHttpReadTimeoutMs());
}
/**
* 作用：授权码查询OPENID接口
* 场景：刷卡支付
* @param reqData 向wxpay post的请求数据
* @param connectTimeoutMs 连接超时时间，单位是毫秒
* @param readTimeoutMs 读超时时间，单位是毫秒
* @return API返回数据
* @throws Exception
*/
public Map authCodeToOpenid(Map reqData, int connectTimeoutMs, int readTimeoutMs) throws Exception {
String url;
if (this.useSandbox) {
url = WXPayConstants.SANDBOX_AUTHCODETOOPENID_URL_SUFFIX;
}
else {
url = WXPayConstants.AUTHCODETOOPENID_URL_SUFFIX;
}
String respXml = this.requestWithoutCert(url, this.fillRequestData(reqData), connectTimeoutMs, readTimeoutMs);
return this.processResponseXml(respXml);
}
}
二维码生成工具类
package com.vodofo.swms.pay.utility;
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 二维码工具类
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
// 二维码尺寸
private static final int QRCODE_SIZE = 300;
// LOGO宽度
private static final int WIDTH = 60;
// LOGO高度
private static final int HEIGHT = 60;
private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
Hashtable hints = new Hashtable();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
if (imgPath == null || "".equals(imgPath)) {
return image;
}
// 插入图片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
File file = new File(imgPath);
if (!file.exists()) {
System.err.println("" + imgPath + " 该文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) {
width = WIDTH;
}
if (height > HEIGHT) {
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
mkdirs(destPath);
// String file = new Random().nextInt(99999999)+".jpg";
// ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
ImageIO.write(image, FORMAT_NAME, new File(destPath));
}
public static BufferedImage encode(String content, String imgPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
return image;
}
public static void mkdirs(String destPath) {
File file = new File(destPath);
// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
public static void encode(String content, String imgPath, String destPath) throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}
// 被注释的方法
/*
* public static void encode(String content, String destPath, boolean
* needCompress) throws Exception { QRCodeUtil.encode(content, null, destPath,
* needCompress); }
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
public static void encode(String content, OutputStream output) throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
public static String decode(File file) throws Exception {
BufferedImage image;
image = ImageIO.read(file);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable hints = new Hashtable();
hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
result = new MultiFormatReader().decode(bitmap, hints);
String resultStr = result.getText();
return resultStr;
}
public static String decode(String path) throws Exception {
return QRCodeUtil.decode(new File(path));
}
/**
* 类型转换
* 转换成图片流
*/
public static BufferedImage toBufferedImage(BitMatrix matrix){
int width=matrix.getWidth();//获取二维码的宽度
int height=matrix.getHeight();//获取二维码的高度
BufferedImage image=new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y)==true ? 0xff000000 : 0xFFFFFFFF);
}
}
return image;
}
}
到这里微信统一下单就基本完成了，剩下的就是对微信支付结果的方法回调了
这里有个问题跟大家说一下，有些人可能不知道把获得的二维码放在自己想要的页面，你可以直接让前端在img标签中调用你这个接口就好了，比如我这个接口
支付结果的回调：https://blog.csdn.net/weixin_45589505/article/details/105275698