Encapsulating EasyExcel for Simplified Import/Export in Spring Boot Applications

The author, a senior architect, shares a practical guide on encapsulating EasyExcel in a Spring Boot + MyBatis‑Plus project to simplify Excel import and export for developers.

Environment preparation : SpringBoot, MyBatis‑Plus, and a MySQL table definition are shown.

Usage steps :

Inject @Autowired ExcelService excelService; in the controller.

Annotate entity fields with EasyExcel annotations ( @ExcelProperty , @Schema ) to map columns.

Call excelService.importExcel(...) and excelService.exportExcel(...) in controller methods.

Full controller example is provided, demonstrating import and export endpoints.

Encapsulation process :

The core interface ExcelService defines overloaded methods for export (basic, with type conversion, template based) and import (with optional mapping function). The implementation DefaultExcelServiceImpl uses Alibaba EasyExcel to write streams, register a LocalDateTimeConverter , and set HTTP response headers.

Utility class ExcelUtils offers static methods for writing Excel files, exporting with templates, and reading data from uploaded files. It also handles response setup and error fallback.

Listener ExcelListener collects parsed rows and logs each record.

Common issues and solutions are discussed: date format mismatches when using templates (custom DateConverter ), POI version compatibility, and LocalDateTime conversion (provided LocalDateTimeConverter ).

The article notes a limitation of EasyExcel 3.3.2 where template export only supports .xls , not .xlsx , and invites readers to share solutions.

References include the official EasyExcel documentation.