JAVA操作Excel

package com.zving.demo;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ExcelStudy {

    public static void main(String[] args) {
        exportExcel();
        readExcel();
    }

    /*
     * 导出Excel表格
     */
    public static void exportExcel() {
        String[] title = { "id", "name", "sex" };// 表头

        // 创建Excel表格
        @SuppressWarnings("resource")
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 创建工作表sheet
        HSSFSheet sheet = workbook.createSheet();
        // 创建第一行
        HSSFRow row = sheet.createRow(0);
        // 定义单元格
        HSSFCell cell = null;
        // 插入表头数据（第一行）
        for (int i = 0; i < title.length; i++) {
            cell = row.createCell(i);
            cell.setCellValue(title[i]);
        }
        // 插入单元格数据（第二行开始）
        for (int i = 1; i < 10; i++) {
            HSSFRow nextRow = sheet.createRow(i);
            HSSFCell cell2 = nextRow.createCell(0);
            cell2.setCellValue("a" + i);
            cell2 = nextRow.createCell(1);
            cell2.setCellValue("user" + i);
            cell2 = nextRow.createCell(2);
            cell2.setCellValue("男");
        }

        // 创建Excel文件
        File file = new File("C:\\Users\\Clover\\Desktop\\abc.xls");
        try {
            file.createNewFile();
            FileOutputStream fos = FileUtils.openOutputStream(file);
            workbook.write(fos);
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

   
    /*
     * 解析Excel表格
     */
    public static void readExcel() {
        File file = new File("C:\\Users\\Clover\\Desktop\\abc.xls");
        try {
            // 读取文件内容
            @SuppressWarnings("resource")
            HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));
            // 读取第一条工作表sheet
            HSSFSheet sheet = workbook.getSheetAt(0);
            int firstRow = 0; // 第一行
            int lastRow = sheet.getLastRowNum(); // 最后一行

            for (int i = firstRow; i < lastRow; i++) {
                HSSFRow row = sheet.getRow(i); // 循环获取每一行
                int lastCell = row.getLastCellNum(); // 获取每一行的单元格数量
                for (int j = 0; j < lastCell; j++) {
                    HSSFCell cell = row.getCell(j); // 循环获取每一单元格
                    String value = cell.getStringCellValue();// 获取每一单元格的数据
                    System.out.print(value + " ");
                }
                System.out.println();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}