写入策略

有如下表

create table `test_user` (
    `id`          int(11),
    `name`        varchar(255),
    `age`         int,
    `create_time` datetime,
    primary key (`id`)
);

列不允许更新

如若 test_user 表的 create_time 列不允许被更新，那么需要配置 @Column 注解 update = false 表示该列不参与更新。

@Table(table = "test_user", autoMapping = false)
public class TestUser {
    @Column(name = "id", primary = true)
    private Integer id;
    @Column("name")
    private String  name;
    @Column("age")
    private Integer age;
    @Column(name = "create_time", update = false) // 列不参与更新
    private Date    createTime;

    // getters and setters omitted
}

Insert 忽略该列

对于某些列新增时想使用数据库的默认值忽略来自应用的设置则可采用 insert 属性

@Table(table = "test_user", autoMapping = false)
public class TestUser {
    @Column(name = "id", primary = true)
    private Integer id;
    @Column("name")
    private String  name;
    @Column("age")
    private Integer age;
    @Column(name = "create_time", insert = false) // 列不参与新增
    private Date    createTime;

    // getters and setters omitted
}