Java使用FastExcel高效读取和写入Excel

<dependency>
    <groupId>cn.idev.excel</groupId>
    <artifactId>fastexcel</artifactId>
    <version>1.2.0</version> <!-- Or the latest version -->
</dependency>

@Data
public class Book {

    private String bookName;
    private String author;
    private BigDecimal price;
    private Date saleDate;
}

@Test
void test01() throws FileNotFoundException {
    File file = ResourceUtils.getFile("classpath:file/demo.xls");
    List<Book> bookList = new ArrayList<>();
    FastExcel.read(file, Book.class, new ReadListener<Book>() {
        @Override
        public void invoke(Book book, AnalysisContext analysisContext) {
            System.out.println("解析数据:" + JSON.toJSONString(book));
            bookList.add(book);
        }

        @Override
        public void doAfterAllAnalysed(AnalysisContext analysisContext) {
            System.out.println("解析完所有数据....");
        }
    }).sheet().doRead();

    System.out.println("bookList:" + JSON.toJSONString(bookList));
}

@Data
public class Book {

    @ExcelProperty(value = "书名")
    private String bookName;
    @ExcelProperty(value = "作者")
    private String author;
    @ExcelProperty(value = "价格")
    @NumberFormat("#,###.00")
    private BigDecimal price;
    @ExcelProperty(value = "上架时间")
    @DateTimeFormat("yyyy-MM-dd")
    private Date saleDate;
}

@Test
void test02() {
    List<Book> bookList = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
        Book item = new Book();
        item.setBookName("Java" + i);
        item.setAuthor("张三" + i);
        item.setPrice(new BigDecimal("2002.35"));
        item.setSaleDate(new Date());
        bookList.add(item);
    }
    FastExcel.write("writeDemo.xls", Book.class).sheet().sheetName("test").doWrite(bookList);
}