java微信--企业付款到银行卡

企业付款到银行卡其实就是企业付款到到零钱的进价版,只不过比到零钱多了一个RSA加密.只要加密好了,根据官方提供的参数,直接请求即可.

首先就是通过官方提供的接口https://fraud.mch.weixin.qq.com/risk/getpublickey获取RSA 公钥,也就是pub_key这个字段.

直接上代码


import org.apache.commons.codec.digest.DigestUtils;
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.conn.ssl.SSLContexts;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.net.ssl.SSLContext;
import java.io.DataInputStream;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLEncoder;
import java.security.KeyStore;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
import java.util.UUID;public class Rsa {//获取RSA加密秘钥接口路径private static final String RSA = "https://fraud.mch.weixin.qq.com/risk/getpublickey";private static final Logger log = LoggerFactory.getLogger("adminLogger");public static void main(String[] args) {Map<String, String> params = new HashMap<>();String nonce_str = getUUID();params.put("mch_id", "商户号");params.put("nonce_str", nonce_str);params.put("sign_type", "MD5");params.put("sign", createSign(params, "商户秘钥"));String result = null;try {result = httpRequestTransfer(RSA, toXml(params), "商户号", "证书路径(http地址类型)");} catch (Exception e) {e.printStackTrace();}log.error("微信请求企业付款接口返回：" + result);}private static String getUUID(){return UUID.randomUUID().toString().replace("-", "");}private static String createSign(Map<String, String> params, String paternerKey) {// 生成签名前先去除signparams.remove("sign");String stringA = packageSign(params, false);String stringSignTemp = stringA + "&key=" + paternerKey;return DigestUtils.md5Hex(stringSignTemp).toUpperCase();}private static String packageSign(Map<String, String> params, boolean urlEncoder) {// 先将参数以其参数名的字典序升序进行排序TreeMap<String, String> sortedParams = new TreeMap<String, String>(params);// 遍历排序后的字典，将所有参数按"key=value"格式拼接在一起StringBuilder sb = new StringBuilder();boolean first = true;for (Map.Entry<String, String> param : sortedParams.entrySet()) {String value = param.getValue();if (StrKit.isBlank(value)) {continue;}if (first) {first = false;} else {sb.append("&");}sb.append(param.getKey()).append("=");if (urlEncoder) {try {value = urlEncode(value);} catch (UnsupportedEncodingException e) {}}sb.append(value);}return sb.toString();}private static String urlEncode(String src) throws UnsupportedEncodingException {return URLEncoder.encode(src, "UTF-8").replace("+", "%20");}private static String httpRequestTransfer(String url, String data, String mch_id, String path) throws Exception {//证书类型KeyStore keyStore = KeyStore.getInstance("PKCS12");URL urlPro = new URL(path);DataInputStream instream = new DataInputStream(urlPro.openStream());try {//指定PKCS12的密码(商户ID)keyStore.load(instream, mch_id.toCharArray());} finally {instream.close();}SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, mch_id.toCharArray()).build();//指定TLS版本SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[]{"TLSv1"}, null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);//设置httpclient的SSLSocketFactoryCloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();try {HttpPost httpost = new HttpPost(url); // 设置响应头信息httpost.addHeader("Accept", "*/*");httpost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");httpost.setEntity(new StringEntity(data, "UTF-8"));CloseableHttpResponse response = httpclient.execute(httpost);try {HttpEntity entity = response.getEntity();String jsonStr = EntityUtils.toString(response.getEntity(), "UTF-8");EntityUtils.consume(entity);return jsonStr;} finally {response.close();}} finally {httpclient.close();}}private static String toXml(Map<String, String> params) {StringBuilder xml = new StringBuilder();xml.append("<xml>");for (Map.Entry<String, String> entry : params.entrySet()) {String key = entry.getKey();String value = entry.getValue();// 略过空值if (StrKit.isBlank(value)) continue;xml.append("<").append(key).append(">");xml.append(entry.getValue());xml.append("</").append(key).append(">");}xml.append("</xml>");return xml.toString();}private static Map<String, String> xmlToMap(String xmlStr) {XmlHelper xmlHelper = XmlHelper.of(xmlStr);return xmlHelper.toMap();}
}

然后把获取到的rsa秘钥保存到本地,修改文件名称以及类型

注意保存的时候不要去掉-----BEGIN RSA PUBLIC KEY----- 和 -----END PUBLIC KEY-----

这个秘钥是PKCS#1格式的,java的话要使用PKCS#8的,文档提供了互转的方法

openssl rsa -RSAPublicKey_in -in <filename> -pubout 用dos命令指令 filename为文件全路径,注意要去掉尖括号
然后把新秘钥也保存到本地

有了秘钥,下面可以进行加密操作,加密成功后基本上就大功告成了

以下是加密方法

 public static void main(String[] args)throws Exception {//待加密数据String card = "123456789";//获取PublicKey对象 第一个参数为rsa公钥地址,这里我把公钥放在了远程服务器上PublicKey  pub = RSAUtil.getPubKey("https://xxx.xxxx.com/pksc8_public.pem", "RSA");//获取加密后数据 后三个参数为固定值(别问为啥,别人那里看的,最后一个参数为填充方式)String encode = Base64.encode(RSAUtil.encrypt(card.getBytes(), pub, 2048, 11, "RSA/ECB/OAEPWITHSHA-1ANDMGF1PADDING"));}

最后是RSAUtil

import javax.crypto.Cipher;
import java.io.*;
import java.lang.reflect.Method;
import java.net.URL;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;public class RSAUtil {public static byte[] encrypt(byte[] plainBytes, PublicKey publicKey, int keyLength, int reserveSize, String cipherAlgorithm) throws Exception {int keyByteSize = keyLength / 8;int encryptBlockSize = keyByteSize - reserveSize;int nBlock = plainBytes.length / encryptBlockSize;if ((plainBytes.length % encryptBlockSize) != 0) {nBlock += 1;}ByteArrayOutputStream outbuf = null;try {Cipher cipher = Cipher.getInstance(cipherAlgorithm);cipher.init(Cipher.ENCRYPT_MODE, publicKey);outbuf = new ByteArrayOutputStream(nBlock * keyByteSize);for (int offset = 0; offset < plainBytes.length; offset += encryptBlockSize) {int inputLen = plainBytes.length - offset;if (inputLen > encryptBlockSize) {inputLen = encryptBlockSize;}byte[] encryptedBlock = cipher.doFinal(plainBytes, offset, inputLen);outbuf.write(encryptedBlock);}outbuf.flush();return outbuf.toByteArray();} catch (Exception e) {throw new Exception("ENCRYPT ERROR:", e);} finally {try {if (outbuf != null) {outbuf.close();}} catch (Exception e) {outbuf = null;throw new Exception("CLOSE ByteArrayOutputStream ERROR:", e);}}}public static PublicKey getPubKey(String publicKeyPath, String keyAlgorithm) {PublicKey publicKey = null;InputStream inputStream = null;try {URL urlPro = new URL(publicKeyPath);inputStream = new DataInputStream(urlPro.openStream());publicKey = getPublicKey(inputStream, keyAlgorithm);} catch (Exception e) {e.printStackTrace();//EAD PUBLIC KEY ERRORSystem.out.println("加载公钥出错!");} finally {if (inputStream != null) {try {inputStream.close();} catch (Exception e) {System.out.println("加载公钥,关闭流时出错!");}}}return publicKey;}public static PublicKey getPublicKey(InputStream inputStream, String keyAlgorithm) throws Exception {try {BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));StringBuilder sb = new StringBuilder();String readLine = null;while ((readLine = br.readLine()) != null) {if (readLine.charAt(0) == '-') {continue;} else {sb.append(readLine);sb.append('\r');}}X509EncodedKeySpec pubX509 = new X509EncodedKeySpec(decodeBase64(sb.toString()));KeyFactory keyFactory = KeyFactory.getInstance(keyAlgorithm);//下行出错  java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big.PublicKey publicKey = keyFactory.generatePublic(pubX509);return publicKey;} catch (Exception e) {e.printStackTrace();throw new Exception("READ PUBLIC KEY ERROR:", e);} finally {try {if (inputStream != null) {inputStream.close();}} catch (IOException e) {inputStream = null;throw new Exception("INPUT STREAM CLOSE ERROR:", e);}}}/**** decode by Base64*/public static byte[] decodeBase64(String input) throws Exception {Class clazz = Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64");Method mainMethod = clazz.getMethod("decode", String.class);mainMethod.setAccessible(true);Object retObj = mainMethod.invoke(null, input);return (byte[]) retObj;}

最后,绑定参数请求微信提供的接口即可

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java微信--企业付款到银行卡

企业付款到银行卡其实就是企业付款到到零钱的进价版,只不过比到零钱多了一个RSA加密.只要加密好了,根据官方提供的参数,直接请求即可.

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