Java利用poi读取Excel详解实现

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.1.2</version>
        </dependency>

package tech.niua.admin.outputvalue.util.reloadexcel;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import tech.niua.admin.outputvalue.domain.OutputValue;
import java.io.IOException;
public class ReloadExcelTest {
    public static void readExcel(String reloadPath) throws IOException {
        //1.获取工作簿
        XSSFWorkbook workbook = new XSSFWorkbook(reloadPath);
        //2.获取工作表
        XSSFSheet sheet = workbook.getSheetAt(0);
        //获取行
        //cell.setCellType(Cell.CELL_TYPE_STRING);    //将不同类型的数据类型转为String
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 1; i <= lastRowNum; i++) {
            OutputValue outputValueEntity = OutputValue.builder().build();
            Row rowValue = sheet.getRow(i);
            //获取每一行中每一个单元格的数据的数据
            for (int j = 0; j < 4; j++) {
                DataFormatter formatter = new DataFormatter();
                String value = formatter.formatCellValue(rowValue.getCell(j));
                System.out.print(value+" ");
            }
            System.out.println();
        }
    }
}

    public static void main(String[] args) throws IOException {
        String reloadPath="D:\\ExcelTest\\test.xlsx";
        ReloadExcelTest.readExcel(reloadPath);
    }