#123 支持微信支付的服务商功能

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpConfigStorage.java

@@ -80,6 +80,16 @@ public interface WxMpConfigStorage {
 
   String getAppId();
 
+  /**
+   * 服务商模式下的子商户公众账号ID
+   */
+  String getSubAppId();
+
+  /**
+   * 服务商模式下的子商户号
+   */
+  String getSubMchId();
+
   String getSecret();
 
   String getPartnerId();

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/WxMpInMemoryConfigStorage.java

@@ -20,6 +20,8 @@ import java.util.concurrent.locks.ReentrantLock;
 public class WxMpInMemoryConfigStorage implements WxMpConfigStorage {
 
   protected volatile String appId;
+  protected volatile String subAppId;
+  protected volatile String subMchId;
   protected volatile String secret;
   protected volatile String partnerId;
   protected volatile String partnerKey;
@@ -349,4 +351,22 @@ public class WxMpInMemoryConfigStorage implements WxMpConfigStorage {
   public boolean useSandboxForWxPay() {
     return false;
   }
+
+  @Override
+  public String getSubAppId() {
+    return subAppId;
+  }
+
+  public void setSubAppId(String subAppId) {
+    this.subAppId = subAppId;
+  }
+
+  @Override
+  public String getSubMchId() {
+    return subMchId;
+  }
+
+  public void setSubMchId(String subMchId) {
+    this.subMchId = subMchId;
+  }
 }

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpPayServiceImpl.java

@@ -268,9 +268,19 @@ public class WxMpPayServiceImpl implements WxMpPayService {
     if (StringUtils.isBlank(request.getAppid())) {
       request.setAppid(getConfig().getAppId());
     }
+
     if (StringUtils.isBlank(request.getMchId())) {
       request.setMchId(getConfig().getPartnerId());
     }
+
+    if (StringUtils.isBlank(request.getSubAppId())) {
+      request.setAppid(getConfig().getSubAppId());
+    }
+
+    if (StringUtils.isBlank(request.getSubMchId())) {
+      request.setMchId(getConfig().getSubMchId());
+    }
+
     if (StringUtils.isBlank(request.getNonceStr())) {
       request.setNonceStr(String.valueOf(System.currentTimeMillis()));
     }