1 Star 0 Fork 0

Sargeraszy/JDFrame

加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
Apache-2.0

JDFrame


travis License

Documentation


Javadocs

背景

burukeyou的私房工具, 由于经常记不住stream的一些api每次要复制来复制去,想要更加语意化的api

于是想到了以前写大数据Spark pandnas 等DataFrame模型时的api, 然后发现其实也存在java的JVM层的DataFrame模型比如 tablesaw,joinery

但是他们得硬编码去指定字段名,这对于有代码洁癖的burukeyou实在难以忍受,而且我只是简单统计下数据,我想在一些场景下能不能使用匿名函数去指定的字段处理去处理,于是便有了这个

一个jvm层级的仿DataFrame工具,语意化和简化java8的stream流式处理工具, 也支持窗口函数

快速开始

版本列表

https://central.sonatype.com/artifact/io.github.burukeyou/jdframe/versions

引入依赖

<dependency>
    <groupId>io.github.burukeyou</groupId>
    <artifactId>jdframe</artifactId>
    <version>0.0.5</version>
</dependency>

快速使用案例

        // 获取学生年龄在9到16岁的学学校合计分数最高的前10名的学校
        SDFrame<FI2<String, BigDecimal>> sdf2 = SDFrame.read(studentList)
                .whereNotNull(Student::getAge)
                .whereBetween(Student::getAge,9,16)
                .groupBySum(Student::getSchool, Student::getScore)
                .sortDesc(FI2::getC2)
                .cutFirst(10);

其他具体API见 IFrame接口 JDFrame 与 SDFrame区别 ,JDFrame的所有操作都是实时生效的

Frame的API列表

  • read() -读取成Frame进行数据处理
  • from() -从其他流读取成Frame进行数据处理
  • toLists() -转换成普通列表
  • stream() -获取Frame的流
  • forEachDo() -迭代处理每个元素等价于forEach
  • defaultScale() -设置统计的数值为小数时的保留精度
  • show() -打印Frame成表到控制台
  • columns() -获取表头列名
  • col() -获取某一列值
  • page() -获取分页数据
  • append() -添加元素
  • union() -合并其他Frame
  • join() -内连接
  • leftJoin() -左边接
  • rightJoin() -右连接
  • map() -矩阵转换
  • mapPercent() -百分数转换
  • partition() -分区
  • addRowNumberCol() -添加序号列(从1开始)
  • addRankCol() -添加排名列
  • sortDesc() -降序排序
  • sortAsc() -升序排序
  • cutFirst() -截取前N个
  • cutLast() -截取后N个
  • cut() - 范围截取
  • cutPage() - 分页截取
  • cutFirstRank() -截取前N排名数据
  • head() -获取前N个元素
  • tail() -获取后N个元素
  • subList() - 范围截取
  • replenish() -补充缺失条目
  • distinct() -去重

==== 筛选 == ======

  • where() -自定义筛选
  • whereNull() -筛选Null值。如果是字符串兼容了空字符串的处理
  • whereNotNull() -筛选非Null值。
  • whereBetween() -筛选范围内的。 前闭后闭
  • whereBetweenN() -筛选范围内的。前开后开
  • whereBetweenR() -筛选范围内的。 前开后闭
  • whereBetweenL() -筛选范围内的。 前闭后开
  • whereNotBetween() -筛选范围外的。 前闭后闭
  • whereNotBetweenN() -筛选范围外的。 前开后开
  • whereIn() - 筛选在列表内的
  • whereNotIn() - 筛选不在列表内的
  • whereTrue() - 筛选值为true的
  • whereNotTrue() - 筛选值为false的
  • whereEq() - 筛选等于的
  • whereNotEq() - 筛选不等于的
  • whereGt() - 筛选大于的
  • whereGe() - 筛选大于等于的
  • whereLt() - 筛选小于的
  • whereLe() - 筛选小于等于的
  • whereLike() - 模糊匹配
  • whereNotLike() -不模糊匹配的
  • whereLikeLeft() - 前缀匹配
  • whereLikeRight() - 后缀匹配

===== 汇总 ====

  • sum() -对某列求和
  • avg() -对某列求平均值
  • maxMin() -获取最大和最小对象
  • maxMinValue() -获取最大和最小值
  • max() -获取最大对象
  • maxValue() -获取最大值
  • minValue() -获取最小值
  • min() -获取最小对象
  • count() -获取行数
  • countDistinct() -去重后获取行数

==== 分组 ====

  • group() -分组
  • groupBySum() -分组求和
  • groupByCount() -分组求数量
  • groupBySumCount() -分组求和以及求数量
  • groupByAvg() -分组求平均值
  • groupByMax() -分组求最大对象
  • groupByMaxValue() -分组求最大值
  • groupByMin() -分组求最小对象
  • groupByMinValue() -分组求最小值
  • groupByMaxMinValue() -分组求最大值和最小值
  • groupByMaxMin() -分组求最大对象和最小对象

==== 窗口函数 ====

  • window() -打开窗口函数
  • overRowNumber() -生成行号
  • overRank() -生成排名号。排名不连续
  • overDenseRank() -生成排名号。排名连续
  • overPercentRank() -生成百分比排名号。 (rank-1) / (rows-1)
  • overCumeDist() -生成累积分布的比率
  • overLag() -生成当前行的前N行数据
  • overLead() -生成当前行的前后行数据
  • overNthValue() -生成窗口范围内的第N行数据
  • overFirstValue() -生成窗口范围内的第1行数据
  • overLastValue() -生成窗口范围内的最后1行数据
  • overSum() -生成和
  • overAvg() -生成平均值
  • overMaxValue() -生成最大值
  • overMinValue() -生成最小值
  • overCount() -生成数量
  • overNtile() -分桶,生成桶编号

其他

如果还有api可以扩展,欢迎你的建议,或者一起扩展

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution." "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work. 2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and (b) You must cause any modified files to carry prominent notices stating that You changed the files; and (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

简介

暂无描述 展开 收起
Java
Apache-2.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

不能加载更多了
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
Java
1
https://gitee.com/sargeraszyking/JDFrame.git
git@gitee.com:sargeraszyking/JDFrame.git
sargeraszyking
JDFrame
JDFrame
main

搜索帮助