Initial commit: backend code

src/main/java/com/example/building/entity/Customer.java

@@ -0,0 +1,59 @@
+package com.example.building.entity;
+
+import com.baomidou.mybatisplus.annotation.*;
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+/**
+ * 客户实体类
+ */
+@Data
+@TableName("customers")
+public class Customer {
+
+    @TableId(type = IdType.ASSIGN_UUID)
+    private String customerId;
+
+    /**
+     * 客户名称
+     */
+    private String name;
+
+    /**
+     * 联系电话
+     */
+    private String phone;
+
+    /**
+     * 客户微信OpenID(用于推送)
+     */
+    private String wechatOpenid;
+
+    /**
+     * 地址
+     */
+    private String address;
+
+    /**
+     * 备注
+     */
+    private String remark;
+
+    /**
+     * 累计消费金额
+     */
+    private BigDecimal totalAmount;
+
+    /**
+     * 创建人ID
+     */
+    private String createdBy;
+
+    @TableField(fill = FieldFill.INSERT)
+    private LocalDateTime createdAt;
+
+    @TableField(fill = FieldFill.INSERT_UPDATE)
+    private LocalDateTime updatedAt;
+}