Java操作Excel之Poi和Jxl

Java操作Excel的方式有Poi和Jxl两总，以下代码为简单实现：

Poi

import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
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.ss.usermodel.WorkbookFactory;
import org.springframework.stereotype.Component;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

@Component
public class ExcelByPoi {

    public static void writeExcelByPoi(String path) {
        try {
            // 创建工作薄
            HSSFWorkbook workbook = new HSSFWorkbook();
            // 创建工作表
            HSSFSheet sheet = workbook.createSheet("sheet1");

            for (int row = 0; row < 10; row++)
            {
                HSSFRow rows = sheet.createRow(row);
                for (int col = 0; col < 10; col++)
                {
                    if(row == 0) {
                        //添加表头
                        rows.createCell(0).setCellValue("姓名");
                        rows.createCell(1).setCellValue("班级");
                        rows.createCell(2).setCellValue("性别");
                        rows.createCell(3).setCellValue("年龄");
                        rows.createCell(4).setCellValue("生日");

                        rows.createCell(5).setCellValue("年纪");
                        rows.createCell(6).setCellValue("学校");
                        rows.createCell(7).setCellValue("班主任");
                        rows.createCell(8).setCellValue("爸爸");
                        rows.createCell(9).setCellValue("妈妈");
                    } else {
                        // 向工作表中添加数据
                        rows.createCell(col).setCellValue("data" + row + col);
                    }
                }
            }

            File xlsFile = new File(path);
            FileOutputStream xlsStream = new FileOutputStream(xlsFile);
            workbook.write(xlsStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void readExcelByPoi(String path) {
        try {
            File xlsFile = new File(path);
            // 获得工作簿
            Workbook workbook = WorkbookFactory.create(xlsFile);
            // 获得工作表个数
            int sheetCount = workbook.getNumberOfSheets();
            // 遍历工作表
            for (int i = 0; i < sheetCount; i++)
            {
                Sheet sheet = workbook.getSheetAt(i);
                // 获得行数
                int rows = sheet.getLastRowNum() + 1;
                // 获得列数，先获得一行，在得到改行列数
                Row tmp = sheet.getRow(0);
                if (tmp == null)
                {
                    continue;
                }
                int cols = tmp.getPhysicalNumberOfCells();
                // 读取数据
                for (int row = 0; row < rows; row++)
                {
                    Row r = sheet.getRow(row);
                    for (int col = 0; col < cols; col++)
                    {
                        System.out.printf("%10s", r.getCell(col).getStringCellValue());
                    }
                    System.out.println();
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        }
    }

}

Jxl

       <dependency>
            <groupId>net.sourceforge.jexcelapi</groupId>
            <artifactId>jxl</artifactId>
            <version>2.6.10</version>
        </dependency>     

import java.io.File;
import java.io.IOException;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.Sheet;
import jxl.read.biff.BiffException;
import org.springframework.stereotype.Component;

@Component
public class ExcelByJxl {

    public static void writeExcelByJxl(String path) {
        try {
            File xlsFile = new File(path);
            // 创建一个工作簿
            WritableWorkbook workbook = Workbook.createWorkbook(xlsFile);
            // 创建一个工作表
            WritableSheet sheet = workbook.createSheet("sheet1", 0);
            for (int row = 0; row < 10; row++)
            {
                for (int col = 0; col < 10; col++)
                {
                    // 向工作表中添加数据
                    sheet.addCell(new Label(col, row, "data" + row + col));
                }
            }

            // 创建一个工作表
            WritableSheet sheet1 = workbook.createSheet("sheet2", 0);
            for (int row = 0; row < 10; row++)
            {
                for (int col = 0; col < 10; col++)
                {
                    if(row == 0) {
                        //添加表头
                        sheet1.addCell(new Label(0, 0, "班级"));
                        sheet1.addCell(new Label(1, 0, "姓名"));
                        sheet1.addCell(new Label(2, 0, "年级"));
                        sheet1.addCell(new Label(3, 0, "年龄"));
                        sheet1.addCell(new Label(4, 0, "生日"));
                        sheet1.addCell(new Label(5, 0, "住址"));
                        sheet1.addCell(new Label(6, 0, "性别"));
                        sheet1.addCell(new Label(7, 0, "爸爸"));
                        sheet1.addCell(new Label(8, 0, "妈妈"));
                        sheet1.addCell(new Label(9, 0, "班主任"));
                    }else {
                        // 向工作表中添加数据
                        sheet1.addCell(new Label(col, row, "data" + row + col));
                    }
                }
            }

            workbook.write();
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        }
    }

    public static void readExcelByJxl(String path) {
        try {
            File xlsFile = new File(path);
            // 获得工作簿对象
            Workbook workbook = Workbook.getWorkbook(xlsFile);
            // 获得所有工作表
            Sheet[] sheets = workbook.getSheets();
            // 遍历工作表
            if (sheets != null)
            {
                for (Sheet sheet : sheets)
                {
                    // 获得行数
                    int rows = sheet.getRows();
                    // 获得列数
                    int cols = sheet.getColumns();
                    // 读取数据
                    for (int row = 0; row < rows; row++)
                    {
                        for (int col = 0; col < cols; col++)
                        {
                            System.out.printf("%10s", sheet.getCell(col, row)
                                    .getContents());
                        }
                        System.out.println();
                    }
                }
            }
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (BiffException e) {
            e.printStackTrace();
        }
    }



}

第三种操作Excel方式