一：微信支付证书配置
二：证书读取以及读取后的使用
package com.zhx.guides.assistant.config.wechatpay;
import org.apache.commons.io.IOUtils;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.springframework.core.io.ClassPathResource;
import javax.net.ssl.SSLContext;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
/**
* @Class WeChatConfigUtil
* @Version 1.0
* @Date 创建时间：2020-06-15 16:19
* @Copyright Copyright by
* @Direction 类说明
*/
public class WeChatConfigUtil {
private static byte[] certData;
/****
* @throws Exception
*/
static {
try {
//从微信商户平台下载的安全证书存放的目录
//String certPath = "D:\\config\\apiclient_cert.p12";
//File file = new File(certPath);
//InputStream certStream = new FileInputStream(file);
//使用springboot配置文件内读取的方式
ClassPathResource classPathResource = new ClassPathResource("\\user_key\\apiclient_cert.p12");
InputStream certStream = classPathResource.getInputStream();
WeChatConfigUtil.certData = IOUtils.toByteArray(certStream);
certStream.read(WeChatConfigUtil.certData);
certStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 开始退款操作
*
* @param mchId 商户ID
* @param url 请求URL
* @param data 退款参数
* @return
* @throws Exception
*/
public static String doRefund(String mchId, String url, String data) throws Exception {
/**
* 注意PKCS12证书 是从微信商户平台-》账户设置-》 API安全 中下载的
*/
KeyStore keyStore = KeyStore.getInstance("PKCS12");
//这里自行实现我是使用数据库配置将证书上传到了服务器可以使用 FileInputStream读取本地文件
//ByteArrayInputStream inputStream = FileUtil.getInputStream("https://############################.p12");
ByteArrayInputStream inputStream = new ByteArrayInputStream(WeChatConfigUtil.certData);
try {
//这里写密码..默认是你的MCHID
keyStore.load(inputStream, mchId.toCharArray());
} finally {
inputStream.close();
}
SSLContext sslcontext = SSLContexts.custom()
//这里也是写密码的
.loadKeyMaterial(keyStore, mchId.toCharArray())
.build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslcontext,
SSLConnectionSocketFactory.getDefaultHostnameVerifier());
CloseableHttpClient httpclient = HttpClients.custom()
.setSSLSocketFactory(sslsf)
.build();
try {
HttpPost httpost = new HttpPost(url);
httpost.setEntity(new StringEntity(data, "UTF-8"));
CloseableHttpResponse response = httpclient.execute(httpost);
try {
HttpEntity entity = response.getEntity();
//接受到返回信息
String jsonStr = EntityUtils.toString(response.getEntity(), "UTF-8");
EntityUtils.consume(entity);
return jsonStr;
} finally {
response.close();
}
} finally {
httpclient.close();
}
}
}
三：发起订单退款操作
/**
* 封装查询请求数据
* @param tradeRefund 退款订单请求信息
* @param path 数据访问PATH
* @return
*/
private static SortedMap<String, Object> refundData( TradeRefund tradeRefund , String path ) throws Exception {
//构建参数
Map<String, String> dataMap = new HashMap<>();
dataMap.put("appid","wx#################");
dataMap.put("mch_id","137#############");
//自行实现该随机串
dataMap.put("nonce_str",Core.MD5("12344"));
dataMap.put("out_trade_no","P190808170038402889c5318502");
dataMap.put("out_refund_no","P190808170038402889c5318502");
dataMap.put("total_fee","1");
dataMap.put("refund_fee","1");
dataMap.put("refund_desc","退款");
//生成签名
String sign = PayToolUtil.createSign("UTF-8", dataMap , WeichatPayConfigure.API_KEY );
//WXPayUtil.generateSignature(dataMap, "rv4###################");
dataMap.put("sign", sign);
//map数据转xml
String requestXML = getRequestXml( dataMap );
logger.info( "订单退款请求参数：\n" + requestXML );
//发起退款
String responseXml = WeChatConfigUtil.doRefund( WeichatPayConfigure.MCH_ID , "https://api.mch.weixin.qq.com/secapi/pay/refund", requestXML );
}
/**
* @author
* @date 2016-4-22
* @Description：将请求参数转换为xml格式的string
* @param parameters
* 请求参数
* @return
*/
public static String getRequestXml(SortedMap<Object, Object> parameters) {
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");
} else {
sb.append("<" + k + ">" + v + "</" + k + ">");
}
}
sb.append("</xml>");
return sb.toString();
}
/**
* @author
* @date 2016-4-22
* @Description：sign签名
* @param characterEncoding
* 编码格式
* @param packageParams
* 请求参数
* @return
*/
public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
StringBuffer sb = new StringBuffer();
Set es = packageParams.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + API_KEY);
String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}
package com.zhx.guides.assistant.interfaces.pay.wechatpay.util;
import java.security.MessageDigest;
public class MD5Util {
private static String byteArrayToHexString(byte b[]) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
resultSb.append(byteToHexString(b[i]));
return resultSb.toString();
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
public static String MD5Encode(String origin, String charsetname) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
if (charsetname == null || "".equals(charsetname))
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
else
resultString = byteArrayToHexString(md.digest(resultString
.getBytes(charsetname)));
} catch (Exception exception) {
}
return resultString;
}
/***
* 简化版本
* @param s
* @return
*/
public final static String MD5(String s) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
try {
byte[] btInput = s.getBytes("utf-8");
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(btInput);
// 获得密文
byte[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
}
/**
* @author
* @date 2016-4-22
* @Description：将请求参数转换为xml格式的string
* @param parameters
* 请求参数
* @return
*/
public static String getRequestXml(SortedMap<Object, Object> parameters) {
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");
} else {
sb.append("<" + k + ">" + v + "</" + k + ">");
}
}
sb.append("</xml>");
return sb.toString();
}
四：请求XML示例
<xml> <appid>wx2421b1c4370ec43b</appid> <mch_id>10000100</mch_id> <nonce_str>6cefdb308e1e2e8aabd48cf79e546a02</nonce_str> <out_refund_no>1415701182</out_refund_no> <out_trade_no>1415757673</out_trade_no> <refund_fee>1</refund_fee> <total_fee>1</total_fee> <transaction_id></transaction_id> <sign>FE56DD4AA85C0EECA82C35595A69E153</sign> </xml>
五：官方信息
官方地址：http://pay.weixin.qq.com/wiki/doc/api/wxa/wxa_api.php?chapter=9_4
需注意这两个参数我使用的是out_trade_no
总结
