ApachePOI 入門案例

1.創建項目apache_poi

2.添加依賴

    <!-- ApachePOI依賴-->
    <dependencies>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>

3. 編寫測試類，實現導出excel、導入excel

package com.pomelo.poi;

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.junit.Test;

import java.io.FileInputStream;
import java.io.FileOutputStream;

public class ApachePoiDemo {

    //往excel寫入數據
    @Test
    public void write() throws Exception {
        // 創建工作簿
        Workbook workbook = new HSSFWorkbook();
        // 創建工作表
        Sheet sheet = workbook.createSheet();
        // 創建第一行
        Row row = sheet.createRow(0);
        // 創建第一行的第一列
        Cell cell = row.createCell(0);
        // 往單元格設置內容
        cell.setCellValue("第一行第一列");

        // 輸出excel
        workbook.write(new FileOutputStream("c:\\tmp\\poi\\demo1.xls"));
        workbook.close();
    }

    // 讀取excel內容
    @Test
    public void read() throws Exception {
        // 根據excel文件流獲取工作簿
        Workbook workbook = new HSSFWorkbook(new FileInputStream("c:\\tmp\\poi\\demo1.xls"));
        // 獲取工作表
        Sheet sheet = workbook.getSheetAt(0);
        // 獲取第一行
        Row row = sheet.getRow(0);
        // 獲取第一行第一列
        Cell cell = row.getCell(0);
        // 獲取單元格
        System.out.println("單元格內容：" + cell.getStringCellValue());
        System.out.println("總行數："+sheet.getPhysicalNumberOfRows());
        System.out.println("總列數："+row.getPhysicalNumberOfCells());

        workbook.close();
    }
}