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ExcelWriter pattern

The ExcelWriter pattern is a procedural workflow used within the EasyExcel library (an Alibaba open-source project) for generating Microsoft Excel spreadsheets in Java applications.^[600-developer__java__3-party__easyExcel.md]

Core Components

The pattern relies on three primary elements to construct a spreadsheet file^[600-developer__java__3-party__easyExcel.md]:

  • ExcelWriter: The central controller object responsible for managing the write operation.
  • OutputStream: The target file stream where the generated Excel data is written.
  • Sheet: A configuration object that defines the sheet index, number, and the corresponding Java data model.

Implementation Workflow

The process begins by instantiating the ExcelWriter class by passing an output stream (e.g., FileOutputStream) and the desired Excel format type (e.g., ExcelTypeEnum.XLSX)^[600-developer__java__3-party__easyExcel.md].

Once initialized, data is written using the writer.write() method. This method requires a list of data objects and a Sheet object which defines the structure of the specific sheet being created^[600-developer__java__3-party__easyExcel.md].

Finally, the writer.finish() method must be called to complete the process.^[600-developer__java__3-party__easyExcel.md]

  • [[ExcelReader]]
  • EasyExcel
  • [[Model Mapping]]

Sources

  • 600-developer__java__3-party__easyExcel.md