feat: 增加证书绝对路径实现

- 配置项增加`certAbsolutePath`字段用来定义证书的绝对路径，优先级高于`certPath`。当这两个路径都不配置时采用classpath路径`wechat/apiclient_cert.p12`。

Closes #73

payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/WechatPayConfiguration.java

@@ -25,6 +25,9 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
 
 import java.util.Map;
 
@@ -59,8 +62,11 @@ public class WechatPayConfiguration {
         v3Map.keySet().forEach(tenantId -> {
             WechatPayProperties.V3 v3 = v3Map.get(tenantId);
             String certPath = v3.getCertPath();
+            String certAbsolutePath = v3.getCertAbsolutePath();
             String mchId = v3.getMchId();
-            WechatMetaBean wechatMetaBean = keyPairFactory.initWechatMetaBean(certPath, CERT_ALIAS, mchId);
+            Resource resource = certAbsolutePath != null ? new FileSystemResource(certAbsolutePath) :
+                    new ClassPathResource(certPath == null ? "wechat/apiclient_cert.p12" : certPath);
+            WechatMetaBean wechatMetaBean = keyPairFactory.initWechatMetaBean(resource, CERT_ALIAS, mchId);
             wechatMetaBean.setV3(v3);
             wechatMetaBean.setTenantId(tenantId);
             container.addWechatMeta(tenantId, wechatMetaBean);

payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/WechatPayProperties.java

@@ -70,6 +70,10 @@ public class WechatPayProperties {
          * wechat pay certificate Path
          */
         private String certPath;
+        /**
+         * wechat pay absolute certificate Path
+         */
+        private String certAbsolutePath;
         /**
          * your pay server domain
          */

payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v2/WechatV2Client.java

@@ -42,6 +42,8 @@ public class WechatV2Client {
         WechatPayProperties.V3 v3 = wechatMetaBean.getV3();
         return model
                 .appSecret(v3.getAppSecret())
+                .certPath(v3.getCertPath())
+                .certAbsolutePath(v3.getCertAbsolutePath())
                 .request(v3.getMchId(), method, url);
     }
 

payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v2/model/BaseModel.java

@@ -37,6 +37,8 @@ import org.bouncycastle.crypto.Digest;
 import org.bouncycastle.crypto.digests.MD5Digest;
 import org.bouncycastle.util.encoders.Hex;
 import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
 import org.springframework.http.RequestEntity;
@@ -97,6 +99,8 @@ public abstract class BaseModel {
     @JsonIgnore
     private String certPath;
     @JsonIgnore
+    private String certAbsolutePath;
+    @JsonIgnore
     private String signType;
 
     public BaseModel appSecret(String appSecret) {
@@ -109,6 +113,10 @@ public abstract class BaseModel {
         return this;
     }
 
+    public BaseModel certAbsolutePath(String certAbsolutePath) {
+        this.certAbsolutePath = certAbsolutePath;
+        return this;
+    }
 
     public BaseModel signType(String signType) {
         this.signType = signType;
@@ -211,8 +219,9 @@ public abstract class BaseModel {
     private RestTemplate getRestTemplateClientAuthentication(String mchId)
             throws IOException, UnrecoverableKeyException, CertificateException, NoSuchAlgorithmException,
             KeyStoreException, KeyManagementException {
-        ClassPathResource resource = new ClassPathResource(certPath == null ? "wechat/apiclient_cert.p12" : certPath);
 
+        Resource resource = certAbsolutePath != null ? new FileSystemResource(certAbsolutePath) :
+                new ClassPathResource(certPath == null ? "wechat/apiclient_cert.p12" : certPath);
         char[] pem = mchId.toCharArray();
 
         KeyStore store = KeyStore.getInstance("PKCS12");

payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/KeyPairFactory.java

@@ -21,6 +21,8 @@ package cn.felord.payment.wechat.v3;
 
 import cn.felord.payment.PayException;
 import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
 
 import java.security.*;
 import java.security.cert.X509Certificate;
@@ -30,7 +32,7 @@ import java.security.cert.X509Certificate;
  *
  * @author felord.cn
  * @since 1.0.0.RELEASE
- **/
+ */
 public class KeyPairFactory {
 
     private static final KeyStore PKCS12_KEY_STORE;
@@ -47,13 +49,13 @@ public class KeyPairFactory {
     /**
      * 获取公私钥.
      *
-     * @param keyPath  the key path
+     * @param resource the resource
      * @param keyAlias the key alias
      * @param keyPass  password
      * @return the key pair
      */
-    public WechatMetaBean initWechatMetaBean(String keyPath, String keyAlias, String keyPass) {
+    public WechatMetaBean initWechatMetaBean(Resource resource, String keyAlias, String keyPass) {
-        ClassPathResource resource = new ClassPathResource(keyPath);
+
         char[] pem = keyPass.toCharArray();
         try {
             PKCS12_KEY_STORE.load(resource.getInputStream(), pem);