poi操作excel2007(读取、生成、编辑)

因为现在再写excel2003版的比较low,所以我在这就不介绍了,直接介绍2007,我所用的编程软件是IDEA

poi操作office总共有6个jar包,在pom.xml文件中配置如下,也可下载后直接引jar包(快捷键ctrl+shift+alt+s----->modules,添加jar包即可)目前poi的jar包最高版本为3.1.6

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-scratchpad</artifactId>
    <version>3.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>3.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-examples -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-examples</artifactId>
    <version>3.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-excelant -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-excelant</artifactId>
    <version>3.16</version>
</dependency>

 接下来进入正题:

1、读取excel

//读取excel表格中的数据,path代表excel路径
  public void readExecl(String path) {
    try {
      //读取的时候可以使用流,也可以直接使用文件名
      XSSFWorkbook xwb = new XSSFWorkbook(path);
      //循环工作表sheet
      for (int numSheet = 0; numSheet < xwb.getNumberOfSheets(); numSheet++) {
        XSSFSheet xSheet = xwb.getSheetAt(numSheet);
        if (xSheet == null) {
          continue;
        }
        //循环行row
        for (int numRow = 0; numRow <= xSheet.getLastRowNum(); numRow++) {
          XSSFRow xRow = xSheet.getRow(numRow);
          if (xRow == null) {
            continue;
          }
          //循环列cell
          for (int numCell = 0; numCell <= xRow.getLastCellNum(); numCell++) {
            XSSFCell xCell = xRow.getCell(numCell);
            if (xCell == null) {
              continue;
            }
            //输出值
            System.out.println("excel表格中取出的数据" + getValue(xCell));
          }
        }

      }

    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  /**
   * 取出每列的值
   *
   * @param xCell 列
   * @return
   */
  private String getValue(XSSFCell xCell) {
    if (xCell.getCellType() == XSSFCell.CELL_TYPE_BOOLEAN) {
      return String.valueOf(xCell.getBooleanCellValue());
    } else if (xCell.getCellType() == XSSFCell.CELL_TYPE_NUMERIC) {
      return String.valueOf(xCell.getNumericCellValue());
    } else {
      return String.valueOf(xCell.getStringCellValue());
    }
  }

2、从数据库中取出数据表,导入并生成excel

数据库表名为Vt_User,其他注释都写得很清楚

public void createExcel() {
    try {
      String path = "D:/test.xlsx";
      // 创建新的Excel 工作簿
      XSSFWorkbook workbook = new XSSFWorkbook();
      // 在Excel工作簿中建一工作表,其名为缺省值
      // 如要新建一名为"用户表"的工作表,其语句为:
      XSSFSheet sheet = workbook.createSheet("用户表");
      // 在索引0的位置创建行(最顶端的行)
      XSSFRow row = sheet.createRow((short) 0);
      //在索引0的位置创建单元格(左上端)
      XSSFCell cell = row.createCell((short) 0);
      //创建单元格样式
      CellStyle cellStyle = workbook.createCellStyle();
      // 设置这些样式
      cellStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
      cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
      cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
      cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
      cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
      cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
      cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

      // 定义单元格为字符串类型
      cell.setCellType(HSSFCell.CELL_TYPE_STRING);
      // 在单元格中输入一些内容
      cell = row.createCell((short) 0);
      cell.setCellValue("用户id");
      cell.setCellStyle(cellStyle);

      cell = row.createCell((short) 1);
      cell.setCellValue("姓名");
      cell.setCellStyle(cellStyle);

      cell = row.createCell((short) 2);
      cell.setCellValue("别名");
      cell.setCellStyle(cellStyle);

      cell = row.createCell((short) 3);
      cell.setCellValue("密码");
      cell.setCellStyle(cellStyle);

      cell = row.createCell((short) 4);
      cell.setCellValue("外来id");
      cell.setCellStyle(cellStyle);

      //查询数据库中所有的数据
      VtUserMapper mapper = getMapper(VtUserMapper.class);
      VtUserCriteria cri = new VtUserCriteria();
      cri.createCriteria().andUserEnabledEqualTo(1);
      List<VtUser> list = mapper.selectByExample(cri);
      /*//第一个sheet第一行为标题
      XSSFRow rowFirst = sheet.createRow(0);
      rowFirst.setHeightInPoints(21.75f);*/
      for (int i = 0; i < list.size(); i++) {
        row = sheet.createRow((int) i + 1);
        VtUser stu = (VtUser) list.get(i);
        // 第四步,创建单元格,并设置值
        row.createCell((short) 0).setCellValue(stu.getUserId());
        row.createCell((short) 1).setCellValue(stu.getUserName());
        row.createCell((short) 2).setCellValue(stu.getUserNameZn());
        row.createCell((short) 3).setCellValue(stu.getUserPassword());
        row.createCell((short) 4).setCellValue(stu.getUserForeignId());
        sheet.autoSizeColumn((short) 0); //调整第一列宽度(自适应),只识别数字、字母
        sheet.autoSizeColumn((short) 1); //调整第二列宽度
        //调整第三列宽度,有中文,先判断这一列的最长字符串
        int length = stu.getUserNameZn().getBytes().length;
        sheet.setColumnWidth((short)2,(short)(length*2*256));
        sheet.autoSizeColumn((short) 3); //调整第四列宽度
        sheet.autoSizeColumn((short) 4); //调整第五列宽度

        /*Font font = workbook.createFont();
        font.setFontHeightInPoints((short)18); //字体大小
        sheet.setDefaultRowHeightInPoints(21.75f);
        font.setFontName("楷体");
        font.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体
        font.setColor(HSSFColor.GREEN.index);    //绿字- 字体颜色*/
      }
      // 新建一输出文件流
      FileOutputStream fOut = new FileOutputStream(path);
      // 把相应的Excel 工作簿存盘
      workbook.write(fOut);
      //清空缓冲区数据
      fOut.flush();
      // 操作结束,关闭文件
      fOut.close();
      System.out.println("文件生成...");
    } catch (Exception e) {
      System.out.println("已运行 xlCreate() : " + e);
    }
  }

3、修改excel

//修改excel表格,path为excel修改前路径(D:\test.xlsx)
  public void writeExcel3(String path) {
    try {
      //传入的文件
      FileInputStream fileInput = new FileInputStream(path);
      //poi包下的类读取excel文件

      // 创建一个webbook,对应一个Excel文件
      XSSFWorkbook workbook = new XSSFWorkbook(fileInput);
      //对应Excel文件中的sheet,0代表第一个
      XSSFSheet sh = workbook.getSheetAt(0);
      //修改excle表的第5行,从第三列开始的数据
      for (int i = 2; i < 4; i++) {
        //对第五行的数据修改
        sh.getRow(4).getCell((short) i).setCellValue(100210 + i);
      }
      //将修改后的文件写出到D:\excel目录下
      FileOutputStream os = new FileOutputStream("D:\修改后test.xlsx");
      // FileOutputStream os = new FileOutputStream("D:\test.xlsx");//此路径也可写修改前的路径,相当于在原来excel文档上修改
      os.flush();
      //将Excel写出
      workbook.write(os);
      //关闭流
      fileInput.close();
      os.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
原文地址:https://www.cnblogs.com/zhxn/p/7016380.html