fastexcel
hypersistence-utils
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fastexcel | hypersistence-utils | |
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5 | 13 | |
603 | 2,258 | |
2.8% | - | |
8.8 | 8.4 | |
5 days ago | 12 days ago | |
Java | Java | |
Apache 2.0 | Apache License 2.0 |
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fastexcel
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FileOutputStream v. ByteArrayOutputStream: is there a noticeable difference in memory usage?
I'm using fastexcel to create the excel file, and I'm flushing it to the OutputStream after every row is written. Right now, I am using a FileOutputStream to write to disk. When the excel file is done being generated, I read it back in using InputStreamResource and stream the response. My thought process is that a ByteArrayOutputStream keeps everything in memory even if I'm flushing the excel file after every row, so I used the FileOutputStream. Does my logic track here? Or am I unnecessarily slowing things down with expensive filesystem IO?
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Favorite hidden gem library?
fastexcel the fastest xlsx generation library
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how to create an excel file from a form in an android app
I would use some library like for example this one. So you collect all the data you want to store in a list or map, and iterate over it, then add them to the excel like shown in the documentation of the library (should always be the same way more or less for any library)
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Any good alternatives to Apache POI for creating Excel spreadsheets?
I've only had memory problems with apache poi. I only use https://github.com/dhatim/fastexcel now
hypersistence-utils
- The best way to use Spring Data query methods
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Spring Boot — Power of Value Objects
Unfortunately, you cannot smoothly wrap the sequence-based IDs with value objects. There are solutions, but they are rather cumbersome. I left the proposal to the Hibernate types project of adding support to this feature. You’ve already seen the benefits of user-defined types. So, you can rate up my issue to make it more popular.
- The Spring Data JPA findById Anti-Pattern
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Favorite hidden gem library?
The Hibernate Types project.
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Persisting JSON with Spring Data
Spring Data / Hibernate does not support JSON fields out-of-the-box, but there is a library that provides custom types for the most common database systems: hibernate-types. This is a fantastic open source library, please support it!
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Hibernate 6 has arrived
I will blog about it in the following months. So far, I managed to add a new Hibernate Types module for Hibernate 6 and released the 2.15 version.
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Hibernate 6 rc1 released!
For current work, hibernate-types works great to support json/jsonb.
- The best way to map JSON with JPA and Hibernate
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Hibernate Community • Performance comparison with JDBC - Does anyone have a modern version of this comparison?
Complex DB structures are not a problem. You can map any database type you want: JSON, HStore, Ranges, Inet, as I did in this hypernate-types project.
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How to register a custom Hibernate ARRAY Type that handles both real[] and text[] array column types
I am using the Hibernate Types library for custom Hibernate types.
What are some alternatives?
Apache POI - Mirror of Apache POI
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
easyexcel - 快速、简洁、解决大文件内存溢出的java处理Excel工具
Spring Data JPA - Simplifies the development of creating a JPA-based data access layer.
Aspose.Cells-for-Java - Aspose.Cells for Java examples, plugins and showcases
public
spreadsheet - Spreadsheet Builder
FlexyPool - FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand.
zerocell - Simple, efficient Excel to POJO library for Java
maven-properties-gen - Maven Properties Generator for Java
docx4j - JAXB-based Java library for Word docx, Powerpoint pptx, and Excel xlsx files
maven-fetcher - Simple Java library for downloading Maven artifacts