用于解决在UI 上 上传excel , 然后解析
依赖：
<!-- ############ poi ############## -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
POIUtils:
package com.sea.shan.utils; import static org.hamcrest.CoreMatchers.nullValue; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.security.interfaces.RSAMultiPrimePrivateCrtKey; import java.util.ArrayList; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.DataFormatter; 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.slf4j.LoggerFactory; import org.springframework.web.multipart.MultipartFile; /** * ************************************************************************* * <PRE> * @ClassName: : POIUtils * * @Description: : * * @Creation Date : 23 Apr 2019 2:38:24 PM * * @Author : Sea * * * </PRE> ************************************************************************** */ public class POIUtils { private static org.slf4j.Logger logger = LoggerFactory.getLogger(POIUtils.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+1;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; } /** * * @param file * @throws IOException */ 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"); } } /** * * @param file * @return */ 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; } /** * * @param filePath * @return */ public static Workbook getWorkBook(String filePath) { //获得文件名 String fileName = filePath; logger.error("file name is : {}",fileName); //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 FileInputStream is = new FileInputStream(filePath); //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; } private static DataFormatter dataFormatter =null; static { dataFormatter = new DataFormatter(); } /** * POI new AIP ,it can change all stype cell value to String * @param cell * @return */ public static String getCellValues(Cell cell){ String cellValue = dataFormatter.formatCellValue(cell); return cellValue; } /** * * @param cell * @return */ 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; } }
test:
package com.sea.shan.poi; import org.apache.poi.ss.usermodel.DataFormatter; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.junit.Test; import com.sea.shan.utils.POIUtils; public class POIUtilsTest { @Test public void testName() throws Exception { Workbook workBook = POIUtils.getWorkBook("/home/sea/Desktop/Test/airline-airport-country-code.xlsx"); Sheet sheetAt0 = workBook.getSheetAt(0); int lastRowNum = sheetAt0.getLastRowNum(); for (int i = 1; i <= lastRowNum; i++) { // get per row Row row = sheetAt0.getRow(i); if(row==null){ continue; } // String cellValue0 = POIUtils.getCellValue(row.getCell(0)); // String cellValue1 = POIUtils.getCellValue(row.getCell(1)); // String cellValue0 = POIUtils.getCellValues(row.getCell(0)); // String cellValue1 = POIUtils.getCellValues(row.getCell(1)); String cellValue0 = new DataFormatter().formatCellValue(row.getCell(0)); String cellValue1 = new DataFormatter().formatCellValue(row.getCell(1)); System.err.println(cellValue0+"="+cellValue1); } } }