feat: 数据库实体基础

src/main/java/com/webgame/webgamebackend/entities/AccountEntity.java

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+package com.webgame.webgamebackend.entities;
+
+import com.webgame.webgamebackend.entities.base.UUIDBaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+
+/**
+ * 账号实体
+ */
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Accessors(chain = true)
+@Table(name = "account") // 映射的表名
+public class AccountEntity extends UUIDBaseEntity {
+    /**
+     * 用户名
+     */
+    @Column(name = "username", unique = true, length = 32)
+    private String username;
+
+    /**
+     * 密码
+     */
+    @Column(name = "password", nullable = false)
+    private String password;
+
+    /**
+     * 邮箱
+     */
+    @Column(name = "email", unique = true, length = 254)
+    private String email;
+
+    /**
+     * 手机号码
+     */
+    @Column(name = "phone", unique = true, length = 11)
+    private String phone;
+}

src/main/java/com/webgame/webgamebackend/entities/base/BaseEntity.java

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+package com.webgame.webgamebackend.entities.base;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.MappedSuperclass;
+import jakarta.persistence.PrePersist;
+import jakarta.persistence.PreUpdate;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+import lombok.extern.slf4j.Slf4j;
+
+import java.io.Serializable;
+import java.time.LocalDateTime;
+
+/**
+ * 基础实体
+ */
+@Getter
+@Setter
+@Accessors(chain = true) // 允许链式调用
+@MappedSuperclass // 表示该类不会映射到数据库表
+public abstract class BaseEntity implements Serializable  {
+    /**
+     * 创建时间
+     */
+    @Column(name = "create_time")
+    protected LocalDateTime createTime;
+    /**
+     * 更新时间
+     */
+    @Column(name = "update_time")
+    protected LocalDateTime updateTime;
+
+    @PrePersist
+    private void preEntityCreateTime() {
+        this.createTime = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    private void preEntityUpdateTime() {
+        this.updateTime = LocalDateTime.now();
+    }
+}
+
+
+/**
+ * pre 插入数据库前,可以影响插入数据
+ * post 插入数据库后,已完成插入，无法再改变字段值
+ * @PrePersist：在实体被持久化之前调用。
+ * @PreRemove：在实体被删除之前调用。
+ * @PostPersist：在实体被持久化之后调用。
+ * @PostRemove：在实体被删除之后调用。
+ * @PostLoad：在实体被加载到持久化上下文后调用。
+ * @PreUpdate：在实体更新之前调用。
+ * @PostUpdate：在实体更新之后调用。
+ */

src/main/java/com/webgame/webgamebackend/entities/base/UUIDBaseEntity.java

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+package com.webgame.webgamebackend.entities.base;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+
+import java.io.Serializable;
+import java.time.LocalDateTime;
+
+/**
+ * 基础实体类,继承该类，则该类将具有String类型的uuid
+ */
+@Getter
+@Setter
+@Accessors(chain = true)
+@MappedSuperclass
+public abstract class UUIDBaseEntity extends BaseEntity implements Serializable {
+    /**
+     * 主键，uuid
+     */
+    @Id
+    @Column(name = "id", unique = true, length = 64)
+    @GeneratedValue(strategy = GenerationType.UUID)
+    protected String id;
+}
+