一、首先申请公众号，认证，开通支付功能（具体配置参照API）
二、登录商户平台进行开发设置（具体配置参照API）
三、具体开发流程
首先，官方给出的SDK和demo和一些具体的API文档看起来比较麻烦，这里我做了简要的步骤介绍，这里我采用的是微信的JSAPI支付方式来做介绍的。
3.1 导入maven依赖
<!-- JSONOBJECT-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.28</version>
</dependency>
<!-- httpclient-->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.3</version>
</dependency>
<!-- wx -->
<dependency>
<groupId>com.github.wxpay</groupId>
<artifactId>wxpay-sdk</artifactId>
<version>0.0.3</version>
</dependency>3.2 前台首先要 用户同意授权，获取code，方法如下：
appid：公众号的APPID、redirect_uri：授权后重定向的地址(此处域名用NGINX映射到了网站的首页)、response_type：固定值code、scope：应用授权作用域，snsapi_base （未关注，不弹出授权页面，直接跳转，只能获取用户openid），snsapi_userinfo （弹出授权页面，可通过openid拿到昵称、性别、所在地。并且， 即使在未关注的情况下，只要用户授权，也能获取其信息 ）、state：重定向后会带上state参数，开发者可以填写a-zA-Z0-9的参数值，最多128字节
在回调方法中可以获取到code值；在页面的地址栏中也可以获取到；
3.3通过code换取网页授权的access_token（这里只需要其中的openId），获取方法如下：
参数介绍：appid：同上、secret：微信公众号里的开发者密码（APPSecret）、code：3.2获取的code、grant_type：固定值authorization_code（返回参数中会有我们需要的openId）
3.4就是调用微信统一下单的接口了
3.5把统一下单的返回数据返回给前台，前台在携带参数跳转到微信的支付页面（后续的工作就是微信那边处理的了，不需要我们考虑）
3.6统一下单传入的参数有一个回调地址，微信支付完后会根据你传的回调地址进行异步通知你，我们只需要接受消息处理我们支付成功后的逻辑，并返回给微信已收到通知。
四、直接上代码（简单易懂）
4.1 官网demo中的常量
/**
* 常量
*/
public class WXPayConstants {
public enum SignType {
MD5, HMACSHA256
}
public static final String APP_ID = "";//appid
public static final String MCH_ID = "";//商家ID
public static final String SECRET = "";//APP KEY
public static final String OPENID_URL = "https://api.weixin.qq.com/sns/oauth2/access_token";
public static final String NOTIFY_URL = "";//回调ip
public static final String UNIFIEDORDER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";//统一下单接口
public static final String RESOUT_CALLBACK_URL = "xxxxxxx/resout/callback";//统一下单接口
public static final String PATERNER_KEY = "";//商户key
public static final String DOMAIN_API = "api.mch.weixin.qq.com";
public static final String DOMAIN_API2 = "api2.mch.weixin.qq.com";
public static final String DOMAIN_APIHK = "apihk.mch.weixin.qq.com";
public static final String DOMAIN_APIUS = "apius.mch.weixin.qq.com";
public static final String FAIL = "FAIL";
public static final String SUCCESS = "SUCCESS";
public static final String HMACSHA256 = "HMAC-SHA256";
public static final String MD5 = "MD5";
public static final String FIELD_SIGN = "sign";
public static final String FIELD_SIGN_TYPE = "sign_type";
public static final String WXPAYSDK_VERSION = "WXPaySDK/3.0.9";
public static final String USER_AGENT = WXPAYSDK_VERSION +
" (" + System.getProperty("os.arch") + " " + System.getProperty("os.name") + " " + System.getProperty("os.version") +
") Java/" + System.getProperty("java.version") + " HttpClient/" + HttpClient.class.getPackage().getImplementationVersion();
public static final String MICROPAY_URL_SUFFIX = "/pay/micropay";
public static final String UNIFIEDORDER_URL_SUFFIX = "/pay/unifiedorder";
public static final String ORDERQUERY_URL_SUFFIX = "/pay/orderquery";
public static final String REVERSE_URL_SUFFIX = "/secapi/pay/reverse";
public static final String CLOSEORDER_URL_SUFFIX = "/pay/closeorder";
public static final String REFUND_URL_SUFFIX = "/secapi/pay/refund";
public static final String REFUNDQUERY_URL_SUFFIX = "/pay/refundquery";
public static final String DOWNLOADBILL_URL_SUFFIX = "/pay/downloadbill";
public static final String REPORT_URL_SUFFIX = "/payitil/report";
public static final String SHORTURL_URL_SUFFIX = "/tools/shorturl";
public static final String AUTHCODETOOPENID_URL_SUFFIX = "/tools/authcodetoopenid";
// sandbox
public static final String SANDBOX_MICROPAY_URL_SUFFIX = "/sandboxnew/pay/micropay";
public static final String SANDBOX_UNIFIEDORDER_URL_SUFFIX = "/sandboxnew/pay/unifiedorder";
public static final String SANDBOX_ORDERQUERY_URL_SUFFIX = "/sandboxnew/pay/orderquery";
public static final String SANDBOX_REVERSE_URL_SUFFIX = "/sandboxnew/secapi/pay/reverse";
public static final String SANDBOX_CLOSEORDER_URL_SUFFIX = "/sandboxnew/pay/closeorder";
public static final String SANDBOX_REFUND_URL_SUFFIX = "/sandboxnew/secapi/pay/refund";
public static final String SANDBOX_REFUNDQUERY_URL_SUFFIX = "/sandboxnew/pay/refundquery";
public static final String SANDBOX_DOWNLOADBILL_URL_SUFFIX = "/sandboxnew/pay/downloadbill";
public static final String SANDBOX_REPORT_URL_SUFFIX = "/sandboxnew/payitil/report";
public static final String SANDBOX_SHORTURL_URL_SUFFIX = "/sandboxnew/tools/shorturl";
public static final String SANDBOX_AUTHCODETOOPENID_URL_SUFFIX = "/sandboxnew/tools/authcodetoopenid";
}
4.2 官网demo中的WXPayUtil
package com.wanrongwang.zulin.wanmobile.wechat;
import com.github.wxpay.sdk.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.*;
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<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) {
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<String, String> 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<String, String> 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<String, String> 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<String, String> 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<String, String> 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<String, String> 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<String, String> 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<String, String> data, String key, SignType signType) throws Exception {
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(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();
}
public static String inputStream2String(InputStream in) {
InputStreamReader reader = null;
try {
reader = new InputStreamReader(in, "UTF-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
BufferedReader br = new BufferedReader(reader);
StringBuilder sb = new StringBuilder();
String line = "";
try {
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
}
4.3 官网demo中WXPayXmlUtil
package com.wanrongwang.zulin.wanmobile.wechat;
import org.w3c.dom.Document;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
/**
* 2018/7/3
*/
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();
}
}
4.4 后台发送http请求的工具
package com.wanrongwang.zulin.wanmobile.utils;
import org.apache.http.client.HttpClient;
import org.hibernate.validator.internal.util.privilegedactions.GetMethod;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
/** Http请求工具类
* @author Administrator
* @date crete by on 2019/3/8 18:08
* @description
*/
public class HttpClientUtil {
/**
* 向指定URL发送GET方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
System.out.println(urlNameString);
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
* 发送请求的 URL
* @param param
* 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
}
4.5 自己定义的控制层（这里的code采用前台获取，直接传到后台）
/**
* 获取openid
* @param code
* @return
*/
@GetMapping("/wechat/getOpenId")
@CrossOrigin
public Map<String , Object> getOpenId(@RequestParam("code") String code){
Map<String , Object> resMap = new HashMap<String,Object>();
//页面获取openId接口
String getopenid_url = WXPayConstants.OPENID_URL;
String param="appid="+WXPayConstants.APP_ID+"&secret="+WXPayConstants.SECRET+"&code="+code+"&grant_type=authorization_code";
//向微信服务器发送get请求获取openIdStr
String openIdStr = HttpClientUtil.sendGet(getopenid_url, param);
JSONObject json = JSONObject.parseObject(openIdStr);//转成Json格式
String openId = json.getString("openid");//获取openId
if (openId != null){
resMap.put("openid",openId);
resMap.put("code",1);
resMap.put("msg","success");
}
else {
resMap.put("code",0);
resMap.put("msg","请求失败");
}
return resMap;
}
/**
* 支付
* @param orderId
* @param request
* @return
*/
@GetMapping("/wechat/payfor")
@CrossOrigin
public Map<String , Object> wxpay(@RequestParam("openid") String openid,
@RequestParam("orderId") String orderId,
HttpServletRequest request){
Map<String , Object> resMap = new HashMap<String,Object>();
logger.info("=============code:{}");
try {
//根据orderId查询 订单
MprOrder order = orderService.queryById(Long.parseLong(orderId));
if (order == null){
resMap.put("code",0);
resMap.put("msg","订单不存在");
return resMap;
}
String orderNum = order.getOrderNumber();
BigDecimal amount = order.getPrice();
//拼接统一下单地址参数
Map<String, String> paraMap = new HashMap<String, String>();
//获取请求ip地址
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getRemoteAddr();
}
if(ip.indexOf(",")!=-1){
String[] ips = ip.split(",");
ip = ips[0].trim();
}
String money = amount.multiply(new BigDecimal(100)).toString();
paraMap.put("appid", WXPayConstants.APP_ID);
paraMap.put("mch_id", WXPayConstants.MCH_ID);
paraMap.put("nonce_str", WXPayUtil.generateNonceStr());
paraMap.put("body", "happy rent - order"); //开心易租-订单结算
paraMap.put("out_trade_no", orderNum);//订单号
paraMap.put("total_fee","1"); //测试改为固定金额
paraMap.put("spbill_create_ip", ip);
paraMap.put("notify_url",WXPayConstants.RESOUT_CALLBACK_URL);// 此路径是微信服务器调用支付结果通知路径随意写
paraMap.put("trade_type", "JSAPI");
paraMap.put("openid", openid);
//用公众号key 失败 ----改为商户key 19-3-12
//String sign = WXPayUtil.generateSignature(paraMap, WXPayConstants.PATERNER_KEY);//微信公众号开发者密码
String sign = WXPayUtil.generateSignature(paraMap, WXPayConstants.MCH_SECRET);//商户密码
paraMap.put("sign", sign);
String xml = WXPayUtil.mapToXml(paraMap);//将所有参数(map)转xml格式
// 统一下单 https://api.mch.weixin.qq.com/pay/unifiedorder
String unifiedorder_url = WXPayConstants.UNIFIEDORDER_URL;
String xmlStr = HttpClientUtil.sendPost(unifiedorder_url, xml);//发送post请求"统一下单接口"返回预支付id:prepay_id
//以下内容是返回前端页面的json数据
String prepay_id = "";//预支付id
if (xmlStr.indexOf("SUCCESS") != -1) {
Map<String, String> map = WXPayUtil.xmlToMap(xmlStr);
prepay_id = (String) map.get("prepay_id");
}
Map<String, String> payMap = new HashMap<String, String>();
payMap.put("appId", WXPayConstants.APP_ID);
payMap.put("timeStamp", WXPayUtil.getCurrentTimestamp()+"");
payMap.put("nonceStr", WXPayUtil.generateNonceStr());
payMap.put("signType", "MD5");
payMap.put("package", "prepay_id=" + prepay_id);
logger.info("=======prepay_id:"+prepay_id);
//String paySign = WXPayUtil.generateSignature(payMap, WXPayConstants.PATERNER_KEY); //公众号key 失败 改为下面 19-3-12
String paySign = WXPayUtil.generateSignature(payMap, WXPayConstants.MCH_SECRET);
payMap.put("paySign", paySign);
resMap.put("code",1);
resMap.put("payMap",payMap);
} catch (Exception e) {
e.printStackTrace();
resMap.put("code",0);
resMap.put("msg","调用统一订单接口错误");
}
return resMap;
}
/**
* 获取code微信回调---callback
* @param request
* @param response
*/
@GetMapping("/callback")
@CrossOrigin
public void callback(HttpServletRequest request, HttpServletResponse response){
logger.info("-------------callback ---------------");
String code = request.getParameter("code");
String state = request.getParameter("state");
//把code放到redis里
redisTemplate.opsForValue().set(state,code);
redisTemplate.expire(state,60*5, TimeUnit.SECONDS);
logger.info("--------code:{},state:{}",code,state);
}
@RequestMapping("/resout/callback")
@CrossOrigin
public String callBack(HttpServletRequest request,HttpServletResponse response){
//System.out.println("微信支付成功,微信发送的callback信息,请注意修改订单信息");
InputStream is = null;
try {
is = request.getInputStream();//获取请求的流信息(这里是微信发的xml格式所有只能使用流来读)
String xml = WXPayUtil.inputStream2String(is);
Map<String, String> notifyMap = WXPayUtil.xmlToMap(xml);//将微信发的xml转map
if(notifyMap.get("return_code").equals("SUCCESS")){
if(notifyMap.get("result_code").equals("SUCCESS")){
String ordersSn = notifyMap.get("out_trade_no");//商户订单号
//处理订单状态
orderService.updateByOrderNum(ordersSn);
}
}
//告诉微信服务器收到信息了，不要在调用回调action了========这里很重要回复微信服务器信息用流发送一个xml即可
response.getWriter().write("<xml><return_code><![CDATA[SUCCESS]]></return_code></xml>");
is.close();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}相关前台JS或有疑虑的地方请参考：https://www.cnblogs.com/gopark/p/9394951.html；
