poi读取excel

1、依赖包

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.5-FINAL</version>
</dependency>

 

2、写xls格式文件

Workbook wb = new XSSFWorkbook();

 CreationHelper createHelper = wb.getCreationHelper();
 //创建页
 Sheet sheet = wb.createSheet("sheet1");
 // 创建行
 Row row = sheet.createRow((short) 0);
 // 创建单元格
 row.createCell(0).setCellValue(258258258);
 row.createCell(1).setCellValue(0.67);
 row.createCell(2).setCellValue(createHelper.createRichTextString("http://www.lookhan.com"));
 row.createCell(3).setCellValue(createHelper.createRichTextString("Java知识笔记"));
 // 写入文件
 FileOutputStream fileOut = null;
 fileOut = new FileOutputStream("D:\\lookhan.xlsx");
 wb.write(fileOut);
 fileOut.close();
 System.out.println("写入成功！");

 

3、写xls格式文件

HSSFWorkbook workbook = new HSSFWorkbook();

// 在Excel工作簿中建一工作表，其名为缺省值
// HSSFSheet sheet = workbook.createSheet("");
HSSFSheet sheet = workbook.createSheet();

HSSFRow row = sheet.createRow(0);

HSSFCell cell = row.createCell(0);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(new HSSFRichTextString("applicationNo"));

cell = row.createCell(1);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(new HSSFRichTextString("userId"));


// 写入文件
FileOutputStream fileOut = null;
fileOut = new FileOutputStream("D:\\lookhan.xls");
workbook.write(fileOut);
fileOut.close();
System.out.println("写入成功！");

 

4、读取xlsx文件

// 构造 XSSFWorkbook 对象，strPath 传入文件路径
XSSFWorkbook xwb = new XSSFWorkbook("D:\\lookhan.xlsx");
// 读取第一章表格内容
XSSFSheet sheet = xwb.getSheetAt(0);
// 定义 row、cell
XSSFRow row;
String cell;
// 循环输出表格中的内容
for (int i = sheet.getFirstRowNum(); i < sheet.getPhysicalNumberOfRows(); i++) {
    row = sheet.getRow(i);
    for (int j = row.getFirstCellNum(); j < row.getPhysicalNumberOfCells(); j++) {
        // 通过 row.getCell(j).toString() 获取单元格内容，
        cell = row.getCell(j).toString();
        System.out.print(cell + "\t");
    }
    System.out.println("");
}

 

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