🆕 #1532 微信支付模块增加汇率查询的接口

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/BaseWxPayRequest.java

@@ -170,6 +170,13 @@ public abstract class BaseWxPayRequest implements Serializable {
    */
   protected abstract void checkConstraints() throws WxPayException;
 
+  /**
+   * 是否需要nonce_str
+   */
+  protected boolean needNonceStr() {
+    return true;
+  }
+
   /**
    * 如果配置中已经设置，可以不设置值.
    *
@@ -363,7 +370,7 @@ public abstract class BaseWxPayRequest implements Serializable {
       }
     }
 
-    if (StringUtils.isBlank(getNonceStr())) {
+    if (needNonceStr() && StringUtils.isBlank(getNonceStr())) {
       this.setNonceStr(String.valueOf(System.currentTimeMillis()));
     }
 

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayQueryExchangeRateRequest.java

@@ -0,0 +1,61 @@
+package com.github.binarywang.wxpay.bean.request;
+
+import com.github.binarywang.wxpay.exception.WxPayException;
+import com.thoughtworks.xstream.annotations.XStreamAlias;
+import lombok.*;
+import lombok.experimental.Accessors;
+
+import java.util.Map;
+
+/**
+ * 查询汇率请求.
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ * @date 2020-05-23
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@Builder
+@Accessors(chain = true)
+@NoArgsConstructor
+@AllArgsConstructor
+@XStreamAlias("xml")
+public class WxPayQueryExchangeRateRequest extends BaseWxPayRequest {
+  private static final long serialVersionUID = -8796516942563060554L;
+  /**
+   * 币种
+   * fee_type
+   * 是
+   * String(10)
+   * USD
+   * 外币币种
+   */
+  @XStreamAlias("fee_type")
+  private String feeType;
+
+  /**
+   * 日期
+   * date
+   * 是
+   * String(14)
+   * 20150807
+   * 格式为yyyyMMdd，如2009年12月25日表示为20091225。时区为GMT+8 beijing
+   */
+  @XStreamAlias("date")
+  private String date;
+
+  @Override
+  protected void checkConstraints() throws WxPayException {
+
+  }
+
+  @Override
+  protected void storeMap(Map<String, String> map) {
+
+  }
+
+  @Override
+  protected boolean needNonceStr() {
+    return false;
+  }
+}

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayQueryExchangeRateResult.java

@@ -0,0 +1,58 @@
+package com.github.binarywang.wxpay.bean.result;
+
+import com.thoughtworks.xstream.annotations.XStreamAlias;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import org.w3c.dom.Document;
+
+/**
+ * 汇率查询响应.
+ *
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ * @date 2020-05-23
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@NoArgsConstructor
+@XStreamAlias("xml")
+public class WxPayQueryExchangeRateResult extends BaseWxPayResult {
+  private static final long serialVersionUID = 2269734222658532364L;
+
+  /**
+   * 币种
+   * fee_type
+   * 是
+   * String(10)
+   * SUCCESS	外币币种，详细请见参数规定
+   */
+  @XStreamAlias("fee_type")
+  private String feeType;
+
+  /**
+   * 汇率时间
+   * rate_time
+   * 是
+   * String(14)
+   * 20150807131545
+   * 格式：yyyyMMddhhmmss
+   */
+  @XStreamAlias("rate_time")
+  private String rateTime;
+
+  /**
+   * 现汇卖出价
+   * rate
+   * 是
+   * String(15)
+   * 系统错误
+   * 外币标准单位乘以100折算为人民币的金额，保留4位小数(如：100美元按当时汇率折算返回的先汇卖出价是628.2100)
+   */
+  @XStreamAlias("rate")
+  private String rate;
+
+  @Override
+  protected void loadXML(Document d) {
+
+  }
+}