添加小游戏道具直购（present_goods）API支持

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/WxMaXPayService.java

@@ -71,6 +71,16 @@ public interface WxMaXPayService {
    */
   WxMaXPayPresentCurrencyResponse presentCurrency(WxMaXPayPresentCurrencyRequest request, WxMaXPaySigParams sigParams) throws WxErrorException;
 
+  /**
+   * 道具直购。
+   *
+   * @param request          道具直购请求对象
+   * @param sigParams        签名参数对象
+   * @return                 道具直购结果
+   * @throws WxErrorException 直购失败时抛出
+   */
+  WxMaXPayPresentGoodsResponse presentGoods(WxMaXPayPresentGoodsRequest request, WxMaXPaySigParams sigParams) throws WxErrorException;
+
   /**
    * 下载对账单。
    *

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaXPayServiceImpl.java

@@ -108,6 +108,22 @@ public WxMaXPayPresentCurrencyResponse presentCurrency(WxMaXPayPresentCurrencyRe
     return getDetailResponse;
   }
 
+  @Override
+  public WxMaXPayPresentGoodsResponse presentGoods(WxMaXPayPresentGoodsRequest request, WxMaXPaySigParams sigParams) throws WxErrorException {
+    final String postBody = request.toJson();
+    final String uri = sigParams.signUriWithPay(PRESENT_GOODS_URL, postBody);
+    String responseContent = this.service.post(uri, postBody);
+    WxMaXPayPresentGoodsResponse getDetailResponse = WxMaGsonBuilder.create()
+      .fromJson(responseContent, WxMaXPayPresentGoodsResponse.class);
+
+    if (getDetailResponse.getErrcode() != 0) {
+      throw new WxErrorException(
+        new WxError(getDetailResponse.getErrcode(), getDetailResponse.getErrmsg()));
+    }
+
+    return getDetailResponse;
+  }
+
   @Override
   public WxMaXPayDownloadBillResponse downloadBill(WxMaXPayDownloadBillRequest request, WxMaXPaySigParams sigParams) throws WxErrorException {
     final String postBody = request.toJson();

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/xpay/WxMaXPayPresentGoodsRequest.java

@@ -0,0 +1,63 @@
+package cn.binarywang.wx.miniapp.bean.xpay;
+
+import cn.binarywang.wx.miniapp.json.WxMaGsonBuilder;
+import com.google.gson.annotations.SerializedName;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+/**
+ * 小游戏道具直购API请求.
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ */
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class WxMaXPayPresentGoodsRequest implements Serializable {
+  private static final long serialVersionUID = 7495157056049312109L;
+
+  /**
+   * 用户的openid.
+   */
+  @SerializedName("openid")
+  private String openid;
+
+  /**
+   * 环境。0-正式环境；1-沙箱环境.
+   */
+  @SerializedName("env")
+  private Integer env;
+
+  /**
+   * 商户订单号.
+   */
+  @SerializedName("order_id")
+  private String orderId;
+
+  /**
+   * 设备类型。0-安卓；1-iOS.
+   */
+  @SerializedName("device_type")
+  private Integer deviceType;
+
+  /**
+   * 道具id.
+   */
+  @SerializedName("goods_id")
+  private String goodsId;
+
+  /**
+   * 道具数量.
+   */
+  @SerializedName("goods_number")
+  private Integer goodsNumber;
+
+  public String toJson() {
+    return WxMaGsonBuilder.create().toJson(this);
+  }
+}

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/xpay/WxMaXPayPresentGoodsResponse.java

@@ -0,0 +1,34 @@
+package cn.binarywang.wx.miniapp.bean.xpay;
+
+import cn.binarywang.wx.miniapp.bean.WxMaBaseResponse;
+import cn.binarywang.wx.miniapp.json.WxMaGsonBuilder;
+import com.google.gson.annotations.SerializedName;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+/**
+ * 小游戏道具直购API响应.
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ */
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class WxMaXPayPresentGoodsResponse extends WxMaBaseResponse implements Serializable {
+  private static final long serialVersionUID = 7495157056049312110L;
+
+  /**
+   * 商户订单号.
+   */
+  @SerializedName("order_id")
+  private String orderId;
+
+  public String toJson() {
+    return WxMaGsonBuilder.create().toJson(this);
+  }
+}

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/constant/WxMaApiUrlConstants.java

@@ -875,6 +875,7 @@ public interface XPay {
     String NOTIFY_PROVIDE_GOODS_URL =
         "https://api.weixin.qq.com/xpay/notify_provide_goods?pay_sig=%s";
     String PRESENT_CURRENCY_URL = "https://api.weixin.qq.com/xpay/present_currency?pay_sig=%s";
+    String PRESENT_GOODS_URL = "https://api.weixin.qq.com/xpay/present_goods?pay_sig=%s";
     String DOWNLOAD_BILL_URL = "https://api.weixin.qq.com/xpay/download_bill?pay_sig=%s";
     String REFUND_ORDER_URL = "https://api.weixin.qq.com/xpay/refund_order?pay_sig=%s";
     String CREATE_WITHDRAW_ORDER_URL =