官网：https://mybatis-mp.cn

mybatis-mp之亮点一：可动态默认值

@Table
@Data
public class DefaultValueTest {

    @TableId
    @TableId(dbType = DbType.ORACLE, value = IdAutoType.SQL, sql = "select default_value_test_seq.NEXTVAL FROM dual")
    @TableId(dbType = DbType.KING_BASE, value = IdAutoType.SQL, sql = "select default_value_test_seq.NEXTVAL FROM dual")
    private Integer id;

    @TableField(defaultValue = "{BLANK}")
    private String value1;

    @TableField(defaultValue = "1", updateDefaultValue = "2")
    private Integer value2;

    @TableField(updateDefaultValue = "4")
    private Integer value4;

    @TableField(defaultValue = "{NOW}")
    private LocalDateTime createTime;

    private TestEnum value3;
}

1：@TableField 即可设置 插入defaultValue默认值  还可以设置修改updateDefaultValue默认值

2：默认值可以是静态默认，还可以动态默认值例如上面{BLANK}，{NOW}；除官网设置的这2个，你可以自己定义动态默认值

 如何自定义动态默认值？

MybatisMpConfig.setDefaultValue("{NOW}",type->{
            if (type == String.class) {
                return StringPool.EMPTY;
            } else if (type.isArray()) {
                return Array.newInstance(type, 0);
            } else if (List.class.isAssignableFrom(type)) {
                return Collections.EMPTY_LIST;
            } else if (Set.class.isAssignableFrom(type)) {
                return Collections.EMPTY_SET;
            } else if (Map.class.isAssignableFrom(type)) {
                return Collections.EMPTY_MAP;
            }
            throw new RuntimeException("Inconsistent types");
        });

此注册代码需要放到项目启动时执行

是不是很简单，很符合开发者的直观体验，快来加入吧