mybatis-plus:
  global-config:
    db-config:
      # 1 代表已刪除。默認(rèn)是1。也可寫為字段名，如：id，這樣刪除時會將id的值寫到邏輯刪除字段
      logic-delete-value: 1
      # 0 代表未刪除。默認(rèn)是0
      logic-not-delete-value: 0

mybatis-plus:
  global-config:
    db-config:
      logic-delete-field: deleted_flag

@Data
@TableName("t_user")
public class User {
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;
    @TableLogic
    private String deleted;
}

    @Test
    public void select(){
        List<User> users = userMapper.selectList(Wrappers.<User>lambdaQuery().eq(User::getAge, 18));
        users.forEach(System.out::println);
    }
    @Test
    public void update(){
        User user = new User();
        user.setEmail("Test@email.com");
        int update = userMapper.update(user, Wrappers.<User>lambdaQuery().eq(User::getAge, 18));
        System.out.println(update);
    }

DEBUG==>  Preparing: SELECT id,login_name,name,password,email,salt,sex,age,phone,user_type,status,organization_id,create_time,is_delete FROM sys_user WHERE deleted='0' AND age = ? 
DEBUG==> Parameters: 18(Integer)
DEBUG<==      Total: 0
DEBUG==>  Preparing: UPDATE sys_user SET email=? WHERE deleted='0' AND age = ? 
DEBUG==> Parameters: Test@email.com(String), 18(Integer)
DEBUG<==    Updates: 0

@Test
    public void delete() {
        int i = userMapper.deleteById(1);
        System.out.println(i);
    }

DEBUG==>  Preparing: UPDATE sys_user SET is_delete='1' WHERE id=? AND deleted='0' 
DEBUG==> Parameters: 1(Integer)
DEBUG<==    Updates: 1

    @TableLogic
    @TableField(select = false)
    private String deleted;