JAVA如何读取Excel数据

1.创建Maven项目在pom文件中添加依赖

<dependencies> <!-- 旧的 .xls --> <!--<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.17</version> </dependency>--> <!-- 新的 .xlsx --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version> </dependency> </dependencies>

2.编写代码

import org.apache.poi.ss.usermodel.*;import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.FileInputStream;import java.io.IOException;public class PoiTest { public static void main(String[] args) throws IOException { FileInputStream is = new FileInputStream('src/main/resources/test.xlsx'); XSSFWorkbook workbook = new XSSFWorkbook(is); //读取Sheet Sheet sheet = workbook.getSheetAt(0); Row row = sheet.getRow(0); //获取最大行数 int rownum = sheet.getPhysicalNumberOfRows(); //获取最大列数 int colnum = row.getPhysicalNumberOfCells(); for (int i = 0; i < rownum; i++) { //获取第i行数据 row = sheet.getRow(i); for (int j = 0; j < colnum; j++) {Cell cell = row.getCell(j);cell.setCellType(CellType.STRING);String cellText = cell.getStringCellValue();System.out.print(cellText + 't'); } System.out.println(); } }}

3.报错

3.1 异常解决Cannot get a STRING value from a NUMERIC cell poi

poi导入excel表格数据时报java.lang.IllegalStateException: Cannot get a STRING value from a NUMERIC cell异常是因为在读取cell单元格字符串时，有number类型的数据，因此需要把它转化为纯String类型，这样就不会报错了。报错的地方类似于这样。

//获取单元格XSSFCell cell = row.getCell(0);//获取单元格数据String cellValue = cell.getStringCellValue();

在number类型转化为String类型的过程中造成了Cannot get a STRING value from a NUMERIC cell这样的问题，因此需要在读取excel单元格数据转化之前设置单元格类型为String，代码如下。

//获取单元格XSSFCell cell = row.getCell(0);//设置单元格类型cell.setCellType(CellType.STRING);//获取单元格数据String cellValue = cell.getStringCellValue();

3.2 poi导出Excel报错java.lang.NoClassDefFoundError: org/openxmlformats/schemas/spreadsheetml/x2006/main/CTWorkbook$Factoryat

Exception in thread 'main' java.lang.NoClassDefFoundError: org/openxmlformats/schemas/spreadsheetml/x2006/main/CTWorkbook$Factoryat org.apache.poi.xssf.usermodel.XSSFWorkbook.onWorkbookCreate(XSSFWorkbook.java:436)at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:238)at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:229)at exportexcel.BuildXLSX.main(BuildXLSX.java:35)Caused by: java.lang.ClassNotFoundException: org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook$Factoryat java.net.URLClassLoader.findClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)... 4 more

错误原因：

未导入poi-ooxml-schema jar包。我使用的是poi-3.15 , 应该是poi-ooxml-schemas-3.15.jar包

以上就是JAVA如何读取Excel数据的详细内容，更多关于JAVA读取Excel数据的资料请关注好吧啦网其它相关文章！