refactor code

src/main/java/com/peanut/modules/book/entity/ExpressOrder.java

@@ -0,0 +1,45 @@
+package com.peanut.modules.book.entity;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+/**
+ * @Description: 快递订单
+ * @Author: Cauchy
+ * @CreateTime: 2023/10/16
+ */
+@Data
+@TableName("express_order")
+public class ExpressOrder {
+    /**
+     * ID
+     */
+    private int id;
+    /**
+     * 用户 ID
+     */
+    private int userId;
+    /**
+     * 用户地址 ID
+     */
+    private int userAddressId;
+    /**
+     * 快递费
+     */
+    private BigDecimal expressFee;
+    /**
+     * 总重量
+     */
+    private BigDecimal totalWeight;
+    /**
+     * 创建时间
+     */
+    private Date createTime;
+    /**
+     * 删除标识
+     */
+    private int delFlag;
+}