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Annotation-based Excel mapping

Annotation-based Excel mapping is a feature provided by the [[easyexcel|EasyExcel]] library that allows developers to define the relationship between Java object fields and Excel columns using annotations.^[600-developer-java-3-party-easyexcel.md] This approach simplifies the process of reading from and writing to Excel files by treating data rows as mapped objects rather than generic collections.^[600-developer-java-3-party-easyexcel.md]

Core Concepts

The library enables operations without a strict model, but using a specific class (e.g., ExcelPropertyIndexModel) allows for the definition of mappings.^[600-developer-java-3-party-easyexcel.md] When writing data, a Sheet object can be instantiated with a specific class to establish the template for the data structure.^[600-developer-java-3-party-easyexcel.md]

Writing Excel

To generate an Excel file using this method, an ExcelWriter is initialized with the output format.^[600-developer-java-3-party-easyexcel.md] The writer uses the configured class to map data fields to the appropriate columns, serializing the data list into the file.^[600-developer-java-3-party-easyexcel.md]

Reading Excel

Reading can be performed with or without a model.^[600-developer-java-3-party-easyexcel.md] The ExcelReader processes the input stream and triggers an AnalysisEventListener for each row of data found.^[600-developer-java-3-party-easyexcel.md] This listener receives the parsed data and the context of the current row, allowing for custom handling of the Excel content.^[600-developer-java-3-party-easyexcel.md]

  • Java
  • [[Object-Relational Mapping]] (Conceptual parallel)
  • [[Serialization]]

Sources

^[600-developer-java-3-party-easyexcel.md]