Java reads data in excel

Java reads data in excel (including .xlsx and .xls)

maven dependencies

<!--读取excel文件-->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>5.2.3</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.3</version>
</dependency>

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.11.0</version>
</dependency>
<!--FileUtils-->

<!--日志-->
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.15.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.15.0</version>
</dependency>
<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>2.15.0</version>
</dependency>

Method 1: Customize the distinction between .xlsx and .xls

public static Workbook getWorkbook1(String path) throws Exception {
    
    
    File file = new File(path);
    InputStream inputStream = new FileInputStream(file);
    String fileName = file.getName();
    Workbook workbook;
    String fileType = fileName.substring(fileName.lastIndexOf("."));
    if (".xls".equals(fileType)) {
    
    
        workbook = new HSSFWorkbook(inputStream);
    } else if (".xlsx".equals(fileType)) {
    
    
        workbook = new XSSFWorkbook(inputStream);
    } else {
    
    
        throw new Exception("请上传Excel");
    }
    inputStream.close();
    return workbook;
}

Method 2: WorkbookFactory.create + InputStream

public static Workbook getWorkbook2(String path) throws IOException, InvalidFormatException {
    
    
    InputStream inputStream = new FileInputStream(path);
    return WorkbookFactory.create(inputStream);
}

方式3：WorkbookFactory.create + FileInputStream

public static Workbook getWorkbook3(String path) throws IOException, InvalidFormatException {
    
    
    FileInputStream inputStream = FileUtils.openInputStream(new File(path));
    return WorkbookFactory.create(inputStream);
}

Read the value of Cell

public static void getCell(Workbook workbook) throws Exception {
    
    
    Sheet sheet;
    Row row;
    Cell cell;
    // sheet页3页时则NumberOfSheets=3，下标索引取值0-2
    for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
    
    
        sheet = workbook.getSheetAt(i);
        // 3行数据时,FirstRowNum=0,LastRowNum=2
        for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
    
    
            row = sheet.getRow(j);
            // 2列时,FirstCellNum=0,LastCellNum=2
            for (int k = row.getFirstCellNum(); k < row.getLastCellNum(); k++) {
    
    
                cell = row.getCell(k);
                System.out.print(cell + "  ");
            }
            System.out.println();
        }
    }
    workbook.close();
}

UT

@Test
public void getWorkbook2_1() throws Exception {
    
    
    String xlsx = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input.xlsx";
    Workbook workbook2 = ExcelUtils.getWorkbook2(xlsx);
    ExcelUtils.getCell(workbook2);
}
@Test
public void getWorkbook2_2() throws Exception {
    
    
    String xls = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input2.xls";
    Workbook workbook2 = ExcelUtils.getWorkbook2(xls);
    ExcelUtils.getCell(workbook2);
}
@Test
public void getWorkbook3_1() throws Exception {
    
    
    String xlsx = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input.xlsx";
    Workbook workbook2 = ExcelUtils.getWorkbook3(xlsx);
    ExcelUtils.getCell(workbook2);
}
@Test
public void getWorkbook3_2() throws Exception {
    
    
    String xls = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input2.xls";
    Workbook workbook2 = ExcelUtils.getWorkbook3(xls);
    ExcelUtils.getCell(workbook2);
}
@Test
public void getWorkbook4_1() throws Exception {
    
    
    String xlsx = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input.xlsx";
    Workbook workbook2 = ExcelUtils.getWorkbook1(xlsx);
    ExcelUtils.getCell(workbook2);
}
@Test
public void getWorkbook4_2() throws Exception {
    
    
    String xls = "D:\\projects\\tutorails_kanomoku\\business-prac\\src\\main\\resources\\input2.xls";
    Workbook workbook2 = ExcelUtils.getWorkbook1(xls);
    ExcelUtils.getCell(workbook2);
}