增加几个支付相关的常量

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

@@ -1,6 +1,7 @@
 package com.github.binarywang.wxpay.bean.request;
 
 import com.github.binarywang.wxpay.config.WxPayConfig;
+import com.github.binarywang.wxpay.constant.WxPayConstants.RefundAccountSource;
 import com.github.binarywang.wxpay.exception.WxPayException;
 import com.thoughtworks.xstream.annotations.XStreamAlias;
 import lombok.*;
@@ -32,8 +33,10 @@ import java.util.Arrays;
 @AllArgsConstructor
 @XStreamAlias("xml")
 public class WxPayRefundRequest extends WxPayBaseRequest {
-  private static final String[] REFUND_ACCOUNT = new String[]{"REFUND_SOURCE_RECHARGE_FUNDS",
+  private static final String[] REFUND_ACCOUNT = new String[]{
-    "REFUND_SOURCE_UNSETTLED_FUNDS"};
+    RefundAccountSource.RECHARGE_FUNDS,
+    RefundAccountSource.UNSETTLED_FUNDS
+  };
   /**
    * <pre>
    * 设备号

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/constant/WxPayConstants.java

@@ -98,7 +98,6 @@ public class WxPayConstants {
     public static final String MD5 = "MD5";
   }
 
-
   /**
    * 限定支付方式
    */
@@ -123,4 +122,155 @@ public class WxPayConstants {
      */
     public static final String FAIL = "FAIL";
   }
+
+  /**
+   * 退款资金来源
+   */
+  public static class RefundAccountSource {
+    /**
+     * 可用余额退款/基本账户
+     */
+    public static final String RECHARGE_FUNDS = "REFUND_SOURCE_RECHARGE_FUNDS";
+
+    /**
+     * 未结算资金退款
+     */
+    public static final String UNSETTLED_FUNDS = "REFUND_SOURCE_UNSETTLED_FUNDS";
+
+  }
+
+  /**
+   * 退款渠道
+   */
+  public static class RefundChannel {
+    /**
+     * 原路退款
+     */
+    public static final String ORIGINAL = "ORIGINAL";
+
+    /**
+     * 退回到余额
+     */
+    public static final String BALANCE = "BALANCE";
+
+    /**
+     * 原账户异常退到其他余额账户
+     */
+    public static final String OTHER_BALANCE = "OTHER_BALANCE";
+
+    /**
+     * 原银行卡异常退到其他银行卡
+     */
+    public static final String OTHER_BANKCARD = "OTHER_BANKCARD";
+  }
+
+  /**
+   * 交易状态
+   */
+  public static class WxpayTradeStatus {
+    /**
+     * 支付成功
+     */
+    public static final String SUCCESS = "SUCCESS";
+
+    /**
+     * 支付失败(其他原因，如银行返回失败)
+     */
+    public static final String PAY_ERROR = "PAYERROR";
+
+    /**
+     * 用户支付中
+     */
+    public static final String USER_PAYING = "USERPAYING";
+
+    /**
+     * 已关闭
+     */
+    public static final String CLOSED = "CLOSED";
+
+    /**
+     * 未支付
+     */
+    public static final String NOTPAY = "NOTPAY";
+
+    /**
+     * 转入退款
+     */
+    public static final String REFUND = "REFUND";
+
+    /**
+     * 已撤销（刷卡支付）
+     */
+    public static final String REVOKED = "REVOKED";
+  }
+
+  /**
+   * 退款状态
+   */
+  public static class RefundStatus {
+    /**
+     * 退款成功
+     */
+    public static final String SUCCESS = "SUCCESS";
+
+    /**
+     * 退款关闭
+     */
+    public static final String REFUND_CLOSE = "REFUNDCLOSE";
+
+    /**
+     * 退款处理中
+     */
+    public static final String PROCESSING = "PROCESSING";
+
+    /**
+     * 退款异常，退款到银行发现用户的卡作废或者冻结了，导致原路退款银行卡失败，可前往商户平台（pay.weixin.qq.com）-交易中心，手动处理此笔退款。
+     */
+    public static final String CHANGE = "CHANGE";
+  }
+
+  /**
+   * 关闭订单结果错误代码
+   */
+  public static class OrderCloseResultErrorCode {
+    /**
+     * 订单已支付
+     */
+    public static final String ORDER_PAID = "ORDERPAID";
+
+    /**
+     * 系统错误
+     */
+    public static final String SYSTEM_ERROR = "SYSTEMERROR";
+
+    /**
+     * 订单不存在
+     */
+    public static final String ORDER_NOT_EXIST = "ORDERNOTEXIST";
+
+    /**
+     * 订单已关闭
+     */
+    public static final String ORDER_CLOSED = "ORDERCLOSED";
+
+    /**
+     * 签名错误
+     */
+    public static final String SIGN_ERROR = "SIGNERROR";
+
+    /**
+     * 未使用POST传递参数
+     */
+    public static final String REQUIRE_POST_METHOD = "REQUIRE_POST_METHOD";
+
+    /**
+     * XML格式错误
+     */
+    public static final String XML_FORMAT_ERROR = "XML_FORMAT_ERROR";
+
+    /**
+     * 订单状态错误
+     */
+    public static final String TRADE_STATE_ERROR = "TRADE_STATE_ERROR";
+  }
 }