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SpringBoot 微信退款功能的示例代码

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：https://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

到此这篇关于SpringBoot 微信退款功能的示例代码的文章就介绍到这了,更多相关SpringBoot 微信退款内容请搜索呐喊教程以前的文章或继续浏览下面的相关文章希望大家以后多多支持呐喊教程！

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