https://github.com/hardiksinghbehl/spring-boot-apache-poi

list of reference POCs to work with excel files using apache-POI and spring-boot
https://github.com/hardiksinghbehl/spring-boot-apache-poi

apache-poi excel-reader excel-validator excel-writer java open-api-v3 spring-boot

Last synced: 27 days ago
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list of reference POCs to work with excel files using apache-POI and spring-boot

• Host: GitHub
• URL: https://github.com/hardiksinghbehl/spring-boot-apache-poi
• Owner: hardikSinghBehl
• Created: 2021-05-30T13:51:15.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-06-13T10:58:37.000Z (over 3 years ago)
• Last Synced: 2024-05-10T18:57:47.224Z (8 months ago)
• Topics: apache-poi, excel-reader, excel-validator, excel-writer, java, open-api-v3, spring-boot
• Language: Java
• Homepage:
• Size: 191 KB
• Stars: 13
• Watchers: 1
• Forks: 7
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## Reference POC projects to work with excel files using Apache POI library and Java Spring-boot

##### All Proof of concepts are deployed to heroku with their links and sample videos included in their respective README.md file

### Proof of concepts included in this repo (Summary)

* **Create excel file with single sheet from database records**

  * Insert 300 dummy employees records in H2 DB on startup using @PostConstruct

  * endpoint exposed to download created excel sheet from the inserted records at runtime

* **Create excel file with multiple sheet from database records**

  * insert super_heroes from different comics in DB at startup (Marvel, Detective Comics)

  * endpoint exposed to download multiple sheet excel file created at runtime

  * each sheet contains records of super_heroes from one comic

  * one sheet for all superheroes from marvel comics, one for DC and so on.

* **Validate data inside excel sheet for errors and return errors as List.of(String)**

  * endpoint exposed for user to download excel template (required columns)

  * user fills in data (rows) to downloaded template

  * exception is thrown is file extension or format(column names and order) is different

  * the errors include leaving cells blank, duplicate email-id, wrong email-id, invalid number type etc

  * each row is validated for errors, if errors exists a list is returned detailing out the error messages along with it's cell position

* **Validate data inside excel sheet for errors and detail out errors in given excel file itself and return the same**

  * same as above (first 4)

  * each cell of each row is validated for errors and if a cell is found to have any error it is colored in RED

  * a new sheet in the same excel file is created detailing out the error messages (type) and the cell position (row, column)

  * the above modified file is returned (downloaded automatically to users screen) if errors exists

* **Read data from excel sheet to database**

  * endpoint exposing to download required excel sheet template (required columns)

  * sheet is validated for errors, if no errors are found a unique 6 digit code and the hex of the validated file is generated, the code is returned as response

  * the code is stored in a cache as key with the validated file's hex being it's value

  * user hits /employee/bulk-upload API with given code and validated file (error thrown if code is invalid or file other than the validated one is provided)

  * each row is read from the given sheet and corresponding records are created in the database