java读取Excel文件并解析

1、maven引入jar包

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>3.17</version>
		</dependency>

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.15</version>
		</dependency>

2、测试类

package com.xd.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class TestExcel {
	
	public static void main(String[] args) {
		//读取文件，返回一个Workbook对象
		Workbook wb = getExcel("D:/iotest/test.xlsx");
		
		if(wb == null) {
			System.out.println("文件读取错误！");
		}else {
			//解析
			parseExcel(wb);
		}
		
	}

	/**
	 * 	解析Excel
	 * @param wb
	 */
	private static void parseExcel(Workbook wb) {
		//解析excel
		Sheet sheet = wb.getSheetAt(0);//读取sheet，从0开始
		int rowNum = sheet.getLastRowNum();//读取行数，从0计数
		for(int i = 0; i <= rowNum; i++) {
			//获得行
			Row row = sheet.getRow(i);
			//获得当前行的列数
			int colNum = row.getLastCellNum();
			for(int j = 0; j < colNum; j++) {
				//获取单元格
				Cell cell = row.getCell(j);
				if(cell == null) {
					System.out.print("null ");
				}else {
					System.out.print(cell.toString()+" ");
				}
			}
			//换行
			System.out.println();
		}
		
		
	}

	/**
	 * 	读取Excel
	 * @param wb
	 */
	private static Workbook getExcel(String filePath) {
		Workbook wb = null;
		
		//封装文件路径
		File file = new File(filePath);
		
		//判断文件是否存在
		if(!file.exists()) {
			System.out.println("文件不存在！");
			return wb;
		}
		
		
		try {
			//文件存在，读取文件
			InputStream is = new FileInputStream(file);
			//获取文件后缀
			String fileSuffix = filePath.substring(filePath.lastIndexOf("."));
			//后缀是xls
			if(".xls".equals(fileSuffix)) {
				wb = new HSSFWorkbook(is);
			}else if(".xlsx".equals(fileSuffix)) {
				wb = new XSSFWorkbook(is);
			}else {
				System.out.println("文件格式不正确！");
			}
		} catch (Exception e) {
			e.printStackTrace();
			return wb;
		}
		
		//返回
		return wb;

	}

}

3、结果