mall + pay：

1. 优化订单管理的接口实现
2. 支付状态增加 refund 类型，将 refund status 合并进去

yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/convert/MoneyConvert.java

@@ -0,0 +1,39 @@
+package cn.iocoder.yudao.framework.excel.core.convert;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+/**
+ * 金额转换器
+ *
+ * 金额单位：分
+ *
+ * @author 芋道源码
+ */
+public class MoneyConvert implements Converter<Integer> {
+
+    @Override
+    public Class<?> supportJavaTypeKey() {
+        throw new UnsupportedOperationException("暂不支持，也不需要");
+    }
+
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        throw new UnsupportedOperationException("暂不支持，也不需要");
+    }
+
+    @Override
+    public WriteCellData<String> convertToExcelData(Integer value, ExcelContentProperty contentProperty,
+                                                    GlobalConfiguration globalConfiguration) {
+        BigDecimal result = BigDecimal.valueOf(value)
+                .divide(new BigDecimal(100), 2, RoundingMode.HALF_UP);
+        return new WriteCellData<>(result.toString());
+    }
+
+}