框架这些就不用说了,主要是POIUtil类
首先是jar包
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.14</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.14</version> </dependency>
然后工具类POIUtil.java
import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; 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.apache.poi.xssf.usermodel.XSSFWorkbook; import org.springframework.web.multipart.MultipartFile; /** * excel读写工具类 * * @author sun.kai 2016年8月21日 */ public class POIUtil { private static Logger logger = Logger.getLogger(POIUtil.class); private final static String xls = "xls"; private final static String xlsx = "xlsx"; /** * 读入excel文件,解析后返回 * * @param file * @throws IOException */ public static List<String[]> readExcel(MultipartFile file) throws IOException { // 检查文件 checkFile(file); // 获得Workbook工作薄对象 Workbook workbook = getWorkBook(file); // 创建返回对象,把每行中的值作为一个数组,所有行作为一个集合返回 List<String[]> list = new ArrayList<String[]>(); if (workbook != null) { for (int sheetNum = 0; sheetNum < workbook.getNumberOfSheets(); sheetNum++) { // 获得当前sheet工作表 Sheet sheet = workbook.getSheetAt(sheetNum); if (sheet == null) { continue; } // 获得当前sheet的开始行 int firstRowNum = sheet.getFirstRowNum(); // 获得当前sheet的结束行 int lastRowNum = sheet.getLastRowNum(); // 循环除了第一行的所有行 for (int rowNum = firstRowNum; rowNum <= lastRowNum; rowNum++) { // 获得当前行 Row row = sheet.getRow(rowNum); if (row == null) { continue; } // 获得当前行的开始列 int firstCellNum = row.getFirstCellNum(); // 获得当前行的列数 int lastCellNum = row.getPhysicalNumberOfCells(); String[] cells = new String[row.getPhysicalNumberOfCells()]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = row.getCell(cellNum); cells[cellNum] = getCellValue(cell); } list.add(cells); } } workbook.close(); } return list; } public static void checkFile(MultipartFile file) throws IOException { // 判断文件是否存在 if (null == file) { logger.error("文件不存在!"); throw new FileNotFoundException("文件不存在!"); } // 获得文件名 String fileName = file.getOriginalFilename(); // 判断文件是否是excel文件 if (!fileName.endsWith(xls) && !fileName.endsWith(xlsx)) { logger.error(fileName + "不是excel文件"); throw new IOException(fileName + "不是excel文件"); } } public static Workbook getWorkBook(MultipartFile file) { // 获得文件名 String fileName = file.getOriginalFilename(); // 创建Workbook工作薄对象,表示整个excel Workbook workbook = null; try { // 获取excel文件的io流 InputStream is = file.getInputStream(); // 根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象 if (fileName.endsWith(xls)) { // 2003 workbook = new HSSFWorkbook(is); } else if (fileName.endsWith(xlsx)) { // 2007 workbook = new XSSFWorkbook(is); } } catch (IOException e) { logger.info(e.getMessage()); } return workbook; } public static String getCellValue(Cell cell) { String cellValue = ""; if (cell == null) { return cellValue; } // 把数字当成String来读,避免出现1读成1.0的情况 if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) { cell.setCellType(Cell.CELL_TYPE_STRING); } // 判断数据的类型 switch (cell.getCellType()) { case Cell.CELL_TYPE_NUMERIC: // 数字 cellValue = String.valueOf(cell.getNumericCellValue()); break; case Cell.CELL_TYPE_STRING: // 字符串 cellValue = String.valueOf(cell.getStringCellValue()); break; case Cell.CELL_TYPE_BOOLEAN: // Boolean cellValue = String.valueOf(cell.getBooleanCellValue()); break; case Cell.CELL_TYPE_FORMULA: // 公式 cellValue = String.valueOf(cell.getCellFormula()); break; case Cell.CELL_TYPE_BLANK: // 空值 cellValue = ""; break; case Cell.CELL_TYPE_ERROR: // 故障 cellValue = "非法字符"; break; default: cellValue = "未知类型"; break; } return cellValue; } }
页面:
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>导入Excel表</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body class="dialogBody"> <div> <form id="form2" method="post" action="http://localhost:8080/iot-web-admin/file.do" enctype="multipart/form-data" style="align: center"> <table width="100%" border="0" cellspacing="0" cellpadding="6" class="blockTable"> <tr> <td></td> </tr> <tr> <td align="center"><h2>选择Excel表:</h2></td> <td align="center"> <div> <input type="file" name="myfile" /> </div> </td> </tr> <tr> <td align="center"><input type="submit" name="submit" value="上传" /></td> </tr> <tr></tr> <tr></tr> <tr></tr> </table> </form> </div> </body> </html>
Controller
package com.sll.iot.admin.controller.file; import java.io.IOException; import java.util.List; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartFile; @Controller @RequestMapping("/") public class FileController { @RequestMapping("file") public void file(@RequestParam(value="myfile",required=false)MultipartFile myfile) { try { List<String[]> lists = POIUtil.readExcel(myfile); for (String[] list : lists) { for (int i = 0; i < list.length; i++) { System.out.println(list[i]); } } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }