Question

我有一张名为guitars.xlsx

的excel表

| Guitar Name | Guitar Year | Guitar Maker |

| Les Paul | 1979 | Gibson |

| 800ce | 2013 | Taylor |

| Stratocaster | 1966 | Fender |

如何使用Apache POI读取此文件并在HashSet中返回这些值？

Answer 1

这些方面的东西：

Workbook wb = WorkbookFactory.create(file);
Sheet worksheet = wb.getSheetAt(0);

String name;
for(int line=1; ; line++) {
    Row row = worksheet.getRow(line);
    Cell cell0 = row.getCell(0), cell1 = row.getCell(1), cell2 = row.getCell(2);
    String name, year, maker;

    if(cell0==null||(name=cell0.getStringCellValue())==null) break;
    year = cell1!=null? cell1.getStringCellValue():null;
    maker = cell2!=null? cell2.getStringCellValue():null;

    Record r = new Record(name, year, maker);
    set.add(r);
}

不要忘记基于Record的所有字段和equals（）函数定义hashCode（）以在HashSet中使用它。

Answer 2

您应该自己搜索this one等教程。这是一个非常简单（未经测试）的例子：

File excelFile = new File("guitars.xlsx");
Workbook excelWorkBook = new XSSFWorkbook(excelFile);
Set<String> data = new HashSet<String>();

for(Iterator<Row> rowIterator = excelWorkBook.getSheetAt(0).iterator(); rowIterator.hasNext();) {
    for(Iterator<Cell> cellIterator = rowIterator.next().cellIterator(); cellIterator.hasNext();) {
        data.add(cellIterator.next().getStringCellValue());
    }
}

Apache POI读取Excel数据并将它们放入HashSet中

2 个答案: