微信官方文档地址
https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter4_3_1.shtml#doc-main
第一种：SDK方式
首先引入微信官方的sdk包
<dependency>
<groupId>com.github.wechatpay-apiv3</groupId>
<artifactId>wechatpay-java</artifactId>
<version>0.2.11</version>
</dependency>
核心代码
import cn.hutool.core.util.RandomUtil;
import cn.hutool.core.util.StrUtil;
import com.deliyun.transfer.util.UUIDUtil;
import com.deliyun.transfer.util.WechatPayConstant;
import com.wechat.pay.java.core.Config;
import com.wechat.pay.java.core.RSAAutoCertificateConfig;
import com.wechat.pay.java.service.transferbatch.TransferBatchService;
import com.wechat.pay.java.service.transferbatch.model.InitiateBatchTransferRequest;
import com.wechat.pay.java.service.transferbatch.model.InitiateBatchTransferResponse;
import com.wechat.pay.java.service.transferbatch.model.TransferDetailInput;
import java.util.ArrayList;
import java.util.List;
public class BatchTransfer {
/**
* 商户号
*/
public static String merchantId = "1********";
/**
* 商户API私钥路径
*/
public static String privateKeyPath = "F:apiclient_key.pem";
/**
* 商户证书序列号
*/
public static String merchantSerialNumber = "3860*********************E7447";
/**
* 商户APIV3密钥
*/
public static String apiV3Key = "V**********************************V";
public static TransferBatchService service;
public static void main(String[] args) {
Config config = new RSAAutoCertificateConfig.Builder()
.merchantId(merchantId)
.privateKeyFromPath(privateKeyPath)
.merchantSerialNumber(merchantSerialNumber)
.apiV3Key(apiV3Key)
.build();
service = new TransferBatchService.Builder().config(config).build();
String out_batch_no = RandomUtil.randomNumbers(10);
out_batch_no = StrUtil.concat(true, "sc", out_batch_no);
InitiateBatchTransferRequest initiateBatchTransferRequest = new InitiateBatchTransferRequest();
initiateBatchTransferRequest.setAppid(WechatPayConstant.APP_ID);
initiateBatchTransferRequest.setOutBatchNo(out_batch_no);
initiateBatchTransferRequest.setBatchName("2019年1月深圳分部报销单");
initiateBatchTransferRequest.setBatchRemark("2019年1月深圳分部报销单");
initiateBatchTransferRequest.setTotalAmount(100l);
initiateBatchTransferRequest.setTotalNum(1);
List transferDetailListList = new ArrayList<>();
TransferDetailInput transferDetailInput = new TransferDetailInput();
transferDetailInput.setOutDetailNo(UUIDUtil.getUUID());
transferDetailInput.setTransferAmount(100l);
transferDetailInput.setTransferRemark("2020年4月报销");
transferDetailInput.setOpenid("o_***************************");
// transferDetailInput.setUserName(
// "757b340b45ebef5467rter35gf464344v3542sdf4t6re4tb4f54ty45t4yyry45");
transferDetailListList.add(transferDetailInput);
initiateBatchTransferRequest.setTransferDetailList(
transferDetailListList);
initiateBatchTransferRequest.setTransferSceneId("1000");
InitiateBatchTransferResponse response =
service.initiateBatchTransfer(initiateBatchTransferRequest);
System.out.println(response);
}
}
第二种：API方式
协议对象
public class Transfer {
private String appid; // 直连商户的appid
private String out_batch_no; // 商家批次单号
private String batch_name = "分润红包"; // 该笔批量转账的名称：
private String batch_remark = "分润红包"; // 转账说明，UTF8编码，最多允许32个字符
private int total_amount; // 转账总金额：分
private int total_num = 1; // 转账总笔数
private List transfer_detail_list; // 发起批量转账的明细列表，最多三千笔
public Transfer(String appid, String out_batch_no, int total_amount, List transfer_detail_list) {
this.appid = appid;
this.out_batch_no = out_batch_no;
this.total_amount = total_amount;
this.transfer_detail_list = transfer_detail_list;
}
public String getAppid() {
return appid;
}
public void setAppid(String appid) {
this.appid = appid;
}
public String getOut_batch_no() {
return out_batch_no;
}
public void setOut_batch_no(String out_batch_no) {
this.out_batch_no = out_batch_no;
}
public String getBatch_name() {
return batch_name;
}
public void setBatch_name(String batch_name) {
this.batch_name = batch_name;
}
public String getBatch_remark() {
return batch_remark;
}
public void setBatch_remark(String batch_remark) {
this.batch_remark = batch_remark;
}
public int getTotal_amount() {
return total_amount;
}
public void setTotal_amount(int total_amount) {
this.total_amount = total_amount;
}
public int getTotal_num() {
return total_num;
}
public void setTotal_num(int total_num) {
this.total_num = total_num;
}
public List getTransfer_detail_list() {
return transfer_detail_list;
}
public void setTransfer_detail_list(List transfer_detail_list) {
this.transfer_detail_list = transfer_detail_list;
}
public static class TransferDetailList {
private String out_detail_no = UUIDUtil.getUUID(); // 商户系统内部区分转账批次单下不同转账明细单的唯一标识，要求此参数只能由数字、大小写字母组成
private int transfer_amount; // 转账金额单位为分
private String transfer_remark = "分润红包"; //转账备注
private String openid; // 用户在直连商户应用下的用户标示
public TransferDetailList( int transfer_amount, String openid) {
this.transfer_amount = transfer_amount;
this.openid = openid;
}
public String getOut_detail_no() {
return out_detail_no;
}
public void setOut_detail_no(String out_detail_no) {
this.out_detail_no = out_detail_no;
}
public int getTransfer_amount() {
return transfer_amount;
}
public void setTransfer_amount(int transfer_amount) {
this.transfer_amount = transfer_amount;
}
public String getTransfer_remark() {
return transfer_remark;
}
public void setTransfer_remark(String transfer_remark) {
this.transfer_remark = transfer_remark;
}
public String getOpenid() {
return openid;
}
public void setOpenid(String openid) {
this.openid = openid;
}
}
}
工具类 CertUtil.java
public class CertUtil {
public static String APICLIENT_KEY = "conf/cert/apiclient_key.pem";
public static String APICLIENT_CERT = "conf/cert/apiclient_cert.pem";
/**
* 获取私钥。
*
* @return 私钥对象
*/
public static PrivateKey getPrivateKey() throws IOException {
InputStream instream = CertUtil.class.getClassLoader().getResourceAsStream(APICLIENT_KEY);
String content = new String(ByteStreams.toByteArray(instream), StandardCharsets.UTF_8);
// String content = new String(Files.readAllBytes(Paths.get(APICLIENT_KEY)), StandardCharsets.UTF_8);
try {
String privateKey = content.replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "").replaceAll("\\s+", "");
KeyFactory kf = KeyFactory.getInstance("RSA");
return kf.generatePrivate(new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey)));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("当前Java环境不支持RSA", e);
} catch (InvalidKeySpecException e) {
throw new RuntimeException("无效的密钥格式");
}
}
/**
* 获取商户证书。
*
* @return X509证书
*/
public static X509Certificate getCertificate() throws IOException {
// InputStream fis = new FileInputStream(APICLIENT_CERT);
InputStream fis = CertUtil.class.getClassLoader().getResourceAsStream(APICLIENT_CERT);
;
try (BufferedInputStream bis = new BufferedInputStream(fis)) {
CertificateFactory cf = CertificateFactory.getInstance("X509");
X509Certificate cert = (X509Certificate) cf.generateCertificate(bis);
cert.checkValidity();
return cert;
} catch (CertificateExpiredException e) {
throw new RuntimeException("证书已过期", e);
} catch (CertificateNotYetValidException e) {
throw new RuntimeException("证书尚未生效", e);
} catch (CertificateException e) {
throw new RuntimeException("无效的证书文件", e);
}
}
/**
* 获取商户证书序列号
*
* @return
* @throws IOException
*/
public static String getSerialNo() throws IOException {
X509Certificate certificate = getCertificate();
return certificate.getSerialNumber().toString(16).toUpperCase();
}
public static void main(String[] args) {
try {
System.out.println(CertUtil.getCertificate());
} catch (Exception e) {
e.printStackTrace();
}
}
}
HttpUrl工具类
public class HttpUrlUtil {
public static String SCHEMA = "WECHATPAY2-SHA256-RSA2048";
public static String merchantId = WechatPayConstant.MCH_ID; // 服务商
public static String POST = "POST";
public static String GET = "GET";
public static String TRANSFER_URL = "https://api.mch.weixin.qq.com/v3/transfer/batches"; // 转账
public static String postTransfer(String body) {
String authorization = getToken(POST, TRANSFER_URL, body);
String returnMsg = HttpRequest.post(TRANSFER_URL)
.header("Authorization", authorization)
.header("Wechatpay-Serial", WechatPayConstant.merchantSerialNumber)
.body(body)
.execute().body();
JSONObject returnTransferInfo = JSON.parseObject(returnMsg);
return returnTransferInfo.toJSONString();
}
/**
* 获取加密串
*
* @param method
* @param url
* @param body
* @return
*/
public static String getToken(String method, String url, String body) {
String nonceStr = UUIDUtil.getUUID();
long timestamp = System.currentTimeMillis() / 1000;
HttpUrl httpUrl = HttpUrl.parse(url);
String message = buildMessage(method, httpUrl, timestamp, nonceStr, body);
String signature = null;
String certificateSerialNo = null;
try {
signature = sign(message.getBytes("utf-8"));
certificateSerialNo = CertUtil.getSerialNo();
} catch (Exception e) {
e.printStackTrace();
}
return SCHEMA + " mchid=\"" + merchantId + "\"," + "nonce_str=\"" + nonceStr + "\"," + "timestamp=\"" + timestamp + "\"," + "serial_no=\""
+ certificateSerialNo + "\"," + "signature=\"" + signature + "\"";
}
/**
* 得到签名字符串
*/
public static String sign(byte[] message) throws Exception {
Signature sign = Signature.getInstance("SHA256withRSA");
PrivateKey privateKey = CertUtil.getPrivateKey();
sign.initSign(privateKey);
sign.update(message);
return Base64.getEncoder().encodeToString(sign.sign());
}
public static String buildMessage(String method, HttpUrl url, long timestamp, String nonceStr, String body) {
String canonicalUrl = url.encodedPath();
if (url.encodedQuery() != null) {
canonicalUrl += "?" + url.encodedQuery();
}
return method + "\n" + canonicalUrl + "\n" + timestamp + "\n" + nonceStr + "\n" + body + "\n";
}
UUID工具类
public class UUIDUtil {
public static String getUUID () {
return UUID.randomUUID().toString().replace("-", "");
}
public static void main(String[] args) {
System.out.println(UUIDUtil.getUUID());
}
}
常量类 WechatPayConstant.java
public class WechatPayConstant {
/**
* appId
*/
public static String APP_ID = "wx64************";
/**
* 商户号
*/
public static String MCH_ID = "1***********";
/**
* API_V3密钥
*/
public static String API_V3KEY = "V*****************************";
/**
* 证书序列号
*/
public static String merchantSerialNumber = "************************************";
}
转账业务类
public class TransferService {
public static void exe(String openId) {
String out_batch_no = RandomUtil.randomNumbers(10);
out_batch_no = StrUtil.concat(true, "sc", out_batch_no);
int transfer_amount = 100;
Transfer.TransferDetailList transferDetailList = new Transfer.TransferDetailList(transfer_amount, openId);
List list = new ArrayList<>();
list.add(transferDetailList);
Transfer transfer = new Transfer(WechatPayConstant.APP_ID, out_batch_no, transfer_amount, list);
String str = HttpUrlUtil.postTransfer(JSONObject.toJSONString(transfer));
System.out.println("转账结果返回：" + str);
}
public static void main(String[] args) {
String openId = "o_F*******************************";
TransferService.exe(openId);
}
}
执行结果：
{"create_time":"2023-11-22T18:56:39+08:00","batch_id":"131000110008101808*********************3342","batch_status":"ACCEPTED","out_batch_no":"592147839212385514533287"}
那么使用官方skd，怎么才能知道转账的结果呢