excel导入导出，包括纯前端解析，后端解析导入导出方式

package com.joie.core.util; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.text.DecimalFormat; import java.text.SimpleDateFormat; import java.util.LinkedList; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFDateUtil; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class ImportExcelUtils { public static List<List<Object>> importExcel(File file) throws IOException { String fileName = file.getName(); String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName.substring(fileName.lastIndexOf(".") + 1); if ("xls".equals(extension)) { return read2003Excel(file); } else if ("xlsx".equals(extension)) { return read2007Excel(file); } else { throw new IOException("不支持的文件类型"); } } public static List<List<Object>> importExcel(InputStream in ,String fileName) throws IOException { String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName.substring(fileName.lastIndexOf(".") + 1); if ("xls".equals(extension)) { return read2003Excel(in); } else if ("xlsx".equals(extension)) { return read2007Excel(in); } else { throw new IOException("不支持的文件类型"); } } private static List<List<Object>> read2003Excel(InputStream in) throws IOException { List<List<Object>> list = new LinkedList<List<Object>>(); HSSFWorkbook hwb = new HSSFWorkbook(in); HSSFSheet sheet = hwb.getSheetAt(0); Object value = null; HSSFRow row = null; HSSFCell cell = null; for (int i = sheet.getFirstRowNum(); i <= sheet.getPhysicalNumberOfRows(); i++) { row = sheet.getRow(i); if (row == null) { continue; } List<Object> linked = new LinkedList<Object>(); for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) { cell = row.getCell(j); if (cell == null) { continue; } DecimalFormat df = new DecimalFormat("0");// 格式化 number String // 字符 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串 DecimalFormat nf = new DecimalFormat("0");// 格式化数字 switch (cell.getCellType()) { case XSSFCell.CELL_TYPE_STRING: // System.out.println(i+"行"+j+" 列 is String type"); value = cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_NUMERIC: // System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString()); if ("@".equals(cell.getCellStyle().getDataFormatString())) { value = df.format(cell.getNumericCellValue()); } else if ("General".equals(cell.getCellStyle().getDataFormatString())) { value = nf.format(cell.getNumericCellValue()); } else { value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue())); } break; case XSSFCell.CELL_TYPE_BOOLEAN: // System.out.println(i+"行"+j+" 列 is Boolean type"); value = cell.getBooleanCellValue(); break; case XSSFCell.CELL_TYPE_BLANK: // System.out.println(i+"行"+j+" 列 is Blank type"); value = ""; break; default: // System.out.println(i+"行"+j+" 列 is default type"); value = cell.toString(); } if (value == null || "".equals(value)) { continue; } linked.add(value); } list.add(linked); } return list; } /** * 读取 office 2003 excel * * @throws IOException * @throws FileNotFoundException */ private static List<List<Object>> read2003Excel(File file) throws IOException { InputStream in = null; List<List<Object>> dataList = null; try { in = new FileInputStream(file); dataList = read2003Excel(in); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (in != null) { in.close(); } } return dataList; } private static List<List<Object>> read2007Excel(InputStream in) throws IOException { List<List<Object>> list = new LinkedList<List<Object>>(); // 构造 XSSFWorkbook 对象，strPath 传入文件路径 XSSFWorkbook xwb = new XSSFWorkbook(in); // 读取第一章表格内容 XSSFSheet sheet = xwb.getSheetAt(0); Object value = null; XSSFRow row = null; XSSFCell cell = null; for (int i = sheet.getFirstRowNum(); i <= sheet.getPhysicalNumberOfRows(); i++) { row = sheet.getRow(i); if (row == null) { continue; } List<Object> linked = new LinkedList<Object>(); for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) { cell = row.getCell(j); if (cell == null) { continue; } DecimalFormat df = new DecimalFormat("0");// 格式化 number String // 字符 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串 DecimalFormat nf = new DecimalFormat("0");// 格式化数字 switch (cell.getCellType()) { case XSSFCell.CELL_TYPE_STRING: // System.out.println(i+"行"+j+" 列 is String type"); value = cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_NUMERIC: // System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString()); if ("@".equals(cell.getCellStyle().getDataFormatString())) { value = df.format(cell.getNumericCellValue()); } else if ("General".equals(cell.getCellStyle().getDataFormatString())) { value = nf.format(cell.getNumericCellValue()); } else { value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue())); } break; case XSSFCell.CELL_TYPE_BOOLEAN: // System.out.println(i+"行"+j+" 列 is Boolean type"); value = cell.getBooleanCellValue(); break; case XSSFCell.CELL_TYPE_BLANK: // System.out.println(i+"行"+j+" 列 is Blank type"); value = ""; break; default: // System.out.println(i+"行"+j+" 列 is default type"); value = cell.toString(); } if (value == null || "".equals(value)) { continue; } linked.add(value); } list.add(linked); } return list; } /** * 读取Office 2007 excel */ private static List<List<Object>> read2007Excel(File file) throws IOException { InputStream in = null; List<List<Object>> dataList = null; try { in = new FileInputStream(file); dataList = read2007Excel(in); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (in != null) { in.close(); } } return dataList; } public static void main(String[] args) throws IOException { // excel 导入数据demo File file = new File("F:\\666.xlsx"); List<List<Object>> dataList = importExcel(file); for (int i = 1; i < dataList.size(); i++) { for (int j = 1; j < dataList.get(i).size(); j++) { System.out.println(dataList.get(i).get(j)); } System.out.println("------------------"); } } }