POI的简单使用！！！

导入依赖：

        
            org.apache.poi
            poi
            3.14
        
        
        
            org.apache.poi
            poi-ooxml
            3.14
        

我们以Excel表格为例：

首先进行写操作：

/*
 * Copyright (c) 2020, 2024,  All rights reserved.
 *
 */
package com.by;

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;
import java.io.FileOutputStream;

/**
 * 
Project: ican_parent - WriteExcelPoi
 * 
Powered by scl On 2024-01-24 16:16:26
 * 
描述：

 *
 * @author 孙臣龙 [[email protected]]
 * @version 1.0
 * @since 17
 */
public class WriteExcelPoi {
    public static void main(String[] args) throws Exception {
        //创建workbook
        HSSFWorkbook workbook = new HSSFWorkbook();
        //创建sheet
        HSSFSheet sheet = workbook.createSheet("主角团");
        //创建row
        HSSFRow row = sheet.createRow(0);
        //创建cell
        HSSFCell cell = row.createCell(0);
        cell.setCellValue("姓名");
        row.createCell(1).setCellValue("技能");
        for (int i = 1; i <= 5; i++) {
            HSSFRow row1 = sheet.createRow(i);
            //往填写cell内容,第一个单元格
            row1.createCell(0).setCellValue("主角"+i);
            //往填写cell内容,第二个单元格
            row1.createCell(1).setCellValue("万剑归宗"+i);
        }
        //将excel表格输出到某个地方
        workbook.write(new FileOutputStream("C:\\Users\\admin\\Desktop\\主角团.xls"));
    }
}

读取操作：

/*
 * Copyright (c) 2020, 2024,  All rights reserved.
 *
 */
package com.by;

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import java.io.FileInputStream;

/**
 * 
Project: ican_parent - ReadExcelPoi
 * 
Powered by scl On 2024-01-24 16:28:40
 * 
描述：

 *
 * @author 孙臣龙 [[email protected]]
 * @version 1.0
 * @since 17
 */
public class ReadExcelPoi {
    public static void main(String[] args) throws Exception {
        //获取workbook
        HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream("C:\\Users\\admin\\Desktop\\主角团.xls"));
        //获取sheet
        HSSFSheet sheet = workbook.getSheet("主角团");
        for (int i = 1; i <= sheet.getLastRowNum(); i++) {
            //获取row
            HSSFRow row = sheet.getRow(i);
            //获取cell内容
            String name = row.getCell(0).getStringCellValue();
            String show = row.getCell(1).getStringCellValue();
            System.out.println(name+"-------"+show);
        }
    }
}