// 模板导出(Entity)
ExcelExporter<SomeEntityTemplate> exporter = null;
try {
    exporter = GenericSXSSFExcelExporter.<SomeEntityTemplate>builder()
        .path(path)
        .template(SomeEntityTemplate.class)
        .build();
    exporter.write(data);				// 写入数据, 建议分页查询多次写入, 以防查询操作出现OOM
} finally {
    IOUtils.closeQuietly(exporter);		// 输出Excel文件到path
}

// 模板导出(Map)
ExcelExporter<Map<String, Object>> exporter = null;
try {
    exporter = GenericSXSSFExcelExporter.<Map<String, Object>>builder()
        .path(path)
        .template(SomeEntityTemplate.class)
        .build();
    exporter.write(data);
} finally {
    IOUtils.closeQuietly(exporter);
}

// 自定义导出
ExcelExporter<AnyObject> exporter = null;
try {
    exporter = GenericSXSSFExcelExporter.<AnyObject>builder()
        .path(path)
        .title("AnyObject")
        .header(new String[] {"序号", "A", "B", "时间"})
        .parser((row, item) -> {	// 自定义导出不定义template, 但必须自定义parser
            row.createCell(0).setCellValue(row.getRowNum() - 1);
            row.createCell(1).setCellValue(item.getA());
            row.createCell(2).setCellValue(item.getB());
            row.createCell(3).setCellValue(
                    DateFormatUtils.format(item.getGmt(), "yyyy-MM-dd HH:mm:ss")
                );
        }).build();
    exporter.write(data);
} finally {
    IOUtils.closeQuietly(exporter);
}

// 模板
@Setter
@Getter
@AllArgsConstructor
@NoArgsConstructor
@ExcelTemplate(title = "列表")
public class SomeEntityTemplate {
    @ExcelConvert(using = Converter.SequenceGenerator.class)
    @ExcelField(index = 0, value = "序号")
    private Long index;
    @ExcelField(index = 1, value = "ID", mapKey = "id")
    private Long id;
    @ExcelConvert(using = SomeTypeConverter.class)
    @ExcelField(index = 2, value = "类型", mapKey = "some_type")
    private Integer someType;
    @ExcelConvert(using = DateConverter.Milliseconds.class)
    @ExcelField(index = 3, value = "时间", mapKey = "gmt")
    private Long gmt;
}