Java: Read the content in the excel file (simple, detailed, clear, with all codes)

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1. Introducing dependencies

Note: jxl only supports reading .xls files, and reading .xlsx will report an error!

Introduce jxl dependencies in pom.xml

<dependency>
	<groupId>net.sourceforge.jexcelapi</groupId>
	<artifactId>jxl</artifactId>
	<version>2.6.12</version>
</dependency>

2. Import work class

import jxl.Workbook;     //java读取excel表使用的类
import jxl.Sheet;        //java读取的工作铺的类

3. Read excel content

public void readExcel() throws Exception {
    
    
	//根据文件位置找到需要读取的excel文件
    File Inputfile = new File("E:\\readExcel\\needRead.xls");
    
    //根据路径生成 FileInputStream字节流
    FileInputStream fileInputStream = new FileInputStream(Inputfile);
    
    //将FileInputStream转换为Workbook
    Workbook workbook = Workbook.getWorkbook(fileInputStream);
	
	// 默认获取第一张工作表，可以自定义
    Sheet sheet = workbook.getSheet(0);
    
    // 循环获取每一行数据 因为默认第一行为标题行，我们可以从 1 开始循环，如果没有标题行，i从 0 开始
    // sheet.getRows() 获取总行数
    for (int i = 1; i < sheet.getRows(); i++) {
    
    
        // 获取第一列的第 i 行信息 sheet.getCell(列，行)，下标从0开始
        String content1 = sheet.getCell(0, i).getContents();
        // 获取第二列的第 i 行信息
        String content2 = sheet.getCell(1,i).getContents();
        //后面根据需要以此类推
    }
}

For the poi dependency instructions, usage methods and more details that support reading xlsx files, please refer to:
The way Java reads excel, an article to understand (detailed)