分页对象

查询对象需要继承PageQuery类以构造分页子句和排序子句。PageQuery类定义了三个字段， 其中，PageNumber和PageSize用于构建分页子句，Sort 用于构建排序子句。

示例

定义

@Getter
@Setter
@SuperBuilder
@NoArgsConstructor
@AllArgsConstructor
public class UserQuery extends PageQuery {
    private Long idGt;
    //...
}

分页

UserQuery userQuery = UserQuery.builder().build();
List<UserEntity> users = userDataAccess.query(userQuery);
//SELECT id, score, memo FROM User

UserQuery userQuery = UserQuery.builder().pageSize(20).build();
List<UserEntity> users = userDataAccess.query(userQuery);
//SELECT id, score, memo FROM User LIMIT 20 OFFSET 0

// When only PageNumber is set, PageSize will be set to 10
UserQuery userQuery = UserQuery.builder().pageNumber(5).build();
List<UserEntity> users = userDataAccess.query(userQuery);
//SELECT id, score, memo FROM User LIMIT 10 OFFSET 40

UserQuery userQuery = UserQuery.builder().pageNumber(3).pageSize(50).build();
List<UserEntity> users = userDataAccess.query(userQuery);
//SELECT id, score, memo FROM User LIMIT 10 OFFSET 100	

排序

UserQuery userQuery = UserQuery.builder().sort("id,desc;score,asc;memo").build();
List<UserEntity> users = userDataAccess.query(userQuery);
//SELECT id, score, memo FROM User ORDER BY id DESC, score ASC, memo

赋值给Sort字段的字符串需要符合正则表达式：PageQuery.SORT_PTN。