3:绑定APPID和MCHID,开放平台应用关联商户平台。可关系多个,多对多关系 获取APPID和商户号 5:没了,有了APPID、商户号 、商户证书序列号、V3Api密钥、商户私钥。就开始上手吧。 6:导入依赖
<dependency>
<groupId>com.github.wechatpay-apiv3</groupId>
<artifactId>wechatpay-apache-httpclient</artifactId>
<version>0.4.7</version>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.3.10</version>
</dependency>
1.配置支付信息,工具类
/**
* 支付参数配置
* @author liaozan8888@163.com
*/
public interface PayConstants {
String NOTIFY_URL = "XXXX"; //回调地址
String MCH_ID = "XXXX"; //商户号
String MCH_SERIAL_NO = "XXXX"; //商户证书序列号
String API_3KEY = "XXXX"; //Api密钥
String APP_ID = "XXXX"; //ApId
String PACKAGE = "Sign=WXPay"; //签名国定字符串
String privateKey = "XXXX";//商户私钥
}
/**
* 回调签名配置
* @author liaozan8888@163.com
*/
public class AesUtil {
static final int KEY_LENGTH_BYTE = 32;
static final int TAG_LENGTH_BIT = 128;
private final byte[] aesKey;
public AesUtil(byte[] key) {
if (key.length != KEY_LENGTH_BYTE) {
throw new IllegalArgumentException("无效的ApiV3Key,长度必须为32个字节");
}
this.aesKey = key;
}
public String decryptToString(byte[] associatedData, byte[] nonce, String ciphertext) throws GeneralSecurityException, IOException {
try {
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
SecretKeySpec key = new SecretKeySpec(aesKey, "AES");
GCMParameterSpec spec = new GCMParameterSpec(TAG_LENGTH_BIT, nonce);
cipher.init(Cipher.DECRYPT_MODE, key, spec);
cipher.updateAAD(associatedData);
return new String(cipher.doFinal(Base64.getDecoder().decode(ciphertext)), "utf-8");
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new IllegalStateException(e);
} catch (InvalidKeyException | InvalidAlgorithmParameterException e) {
throw new IllegalArgumentException(e);
}
}
}
2.调起APP支付