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(); } }