Excel数据转换为JavaBean对象
package com.eigpay.framework.util.ExcelUtil; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import java.lang.reflect.Field; import java.text.DecimalFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Date; import java.util.List; import org.apache.log4j.Logger; 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.ss.usermodel.DateUtil; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.usermodel.WorkbookFactory; 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; /** * <p>Title: ExcelUtil</p> * <p>Description: Excel数据转换为JavaBean对象</p> * 支持：Excel Date、Integer、Double、Float、Boolean类型 * 支持：Excel2003-2007，再高版本未做测试 * <p>Email: [email protected]</p> * @author 晴天雨 * @date 2016年3月26日下午5:31:54 * @version 1.0 */ public class ExcelUtil<T> { private static final Logger logger = Logger.getLogger(ExcelUtil.class); private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd"); /** * Excel数据转换为对象 * <p>Description: </p> * @param file * @param t * @return * @throws Exception * @date 2016年3月26日下午4:18:20 */ public List<T> excel2OJavaBean(File file, Class<T> t) throws Exception{ if(!file.exists()){ throw new FileNotFoundException(); } List<T> result = new ArrayList<T>(); int beginRowNum = 1; String[][] data = getData(file, beginRowNum); int rowNum = data.length; if(rowNum < 2){ throw new RuntimeException("Excel is not data."); } int cellNum = data[beginRowNum].length-1; if(rowNum < 1){ throw new RuntimeException("Excel is not data."); } Field[] fields = t.getDeclaredFields(); int propertyNum = fields.length; if(propertyNum < cellNum){ logger.info("cellNum=" + cellNum + " propertyNum=" + propertyNum); throw new RuntimeException("Excel column number is greater than the number of object properties."); } for(int x=0; x<rowNum; x++){ T obj = t.newInstance(); for(int y=0; y<cellNum; y++){ Field field = fields[y]; String fieldType = field.getGenericType().toString(); Object value = data[x][y]; if(fieldType.equals("class java.util.Date")){ value = strToDate(value); }else if(fieldType.equals("class java.lang.Integer")){ value = Integer.parseInt(value.toString()); }else if(fieldType.equals("class java.lang.Double")){ value = Double.parseDouble(value.toString()); }else if(fieldType.equals("class java.lang.Float")){ value = Float.parseFloat(value.toString()); }else if(fieldType.equals("class java.lang.Boolean")){ value = Boolean.parseBoolean(value.toString()); } field.setAccessible(true); field.set(obj, value); field.setAccessible(false); } result.add(obj); } return result; } public static String[][] getData(File file, int ignoreRows) { int rowSize = 0; List<String[]> result = new ArrayList<String[]>(); InputStream in = null; try { in = new FileInputStream(file); Workbook wb = WorkbookFactory.create(in); if (wb instanceof XSSFWorkbook) { result = getXSSFResult(wb, ignoreRows); } else if (wb instanceof HSSFWorkbook) { result = getHSSFResult(wb, ignoreRows); } String[][] returnArray = new String[result.size()][rowSize]; for (int i = 0; i < returnArray.length; i++) { returnArray[i] = (String[]) result.get(i); } return returnArray; } catch (Exception e) { e.printStackTrace(); } finally { try { if (in != null) in.close(); } catch (Exception ex) { } } return new String[0][0]; } public static List<String[]> getXSSFResult(Workbook wb, int ignoreRows) { List<String[]> result = new ArrayList<String[]>(); XSSFCell cell = null; int rowSize = 0; for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) { XSSFSheet st = (XSSFSheet) wb.getSheetAt(sheetIndex); for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {// 第一行为标题，不取 XSSFRow row = st.getRow(rowIndex); if (row == null) { continue; } int tempRowSize = row.getLastCellNum() + 1; if (tempRowSize > rowSize) { rowSize = tempRowSize; } String[] values = new String[rowSize]; Arrays.fill(values, ""); boolean hasValue = false; for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) { String value = ""; cell = row.getCell(columnIndex); if (cell != null) { // cell.setEncoding(HSSFCell.ENCODING_UTF_16);// // 注意:一定要设成这个，否则可能会出现乱码 switch (cell.getCellType()) { case XSSFCell.CELL_TYPE_STRING: value = cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_FORMULA: // 导入时如果为公式生成的数据则无值 if (!cell.getStringCellValue().equals("")) { value = cell.getStringCellValue(); } else { value = cell.getNumericCellValue() + ""; } break; case XSSFCell.CELL_TYPE_NUMERIC: if (DateUtil.isCellDateFormatted(cell)) { Date date = cell.getDateCellValue(); if (date != null) { value = sdf.format(date); } else { value = ""; } } else { value = new DecimalFormat("0.00").format(cell .getNumericCellValue()); if (value.endsWith(".00")) { value = value.substring(0, value.length() - 3); } } break; case XSSFCell.CELL_TYPE_BLANK: break; case XSSFCell.CELL_TYPE_ERROR: value = ""; break; case XSSFCell.CELL_TYPE_BOOLEAN: value = (cell.getBooleanCellValue() == true ? "Y" : "N"); break; default: value = ""; } } if (columnIndex == 0 && value.trim().equals("")) { break; } values[columnIndex] = rightTrim(value); hasValue = true; } if (hasValue) { result.add(values); } } } return result; } @SuppressWarnings("deprecation") public static List<String[]> getHSSFResult(Workbook wb, int ignoreRows) { List<String[]> result = new ArrayList<String[]>(); HSSFCell cell = null; int rowSize = 0; for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) { HSSFSheet st = (HSSFSheet) wb.getSheetAt(sheetIndex); for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {// 第一行为标题，不取 HSSFRow row = st.getRow(rowIndex); if (row == null) { continue; } int tempRowSize = row.getLastCellNum() + 1; if (tempRowSize > rowSize) { rowSize = tempRowSize; } String[] values = new String[rowSize]; Arrays.fill(values, ""); boolean hasValue = false; for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) { String value = ""; cell = row.getCell(columnIndex); if (cell != null) { // cell.setEncoding(HSSFCell.ENCODING_UTF_16);//注意:一定要设成这个，否则可能会出现乱码 switch (cell.getCellType()) { case HSSFCell.CELL_TYPE_STRING: value = cell.getStringCellValue(); break; case HSSFCell.CELL_TYPE_NUMERIC: if (HSSFDateUtil.isCellDateFormatted(cell)) { Date date = cell.getDateCellValue(); if (date != null) { value = sdf.format(date); } else { value = ""; } } else { value = new DecimalFormat("0.00").format(cell.getNumericCellValue()); if (value.endsWith(".00")) { value = value.substring(0,value.length() - 3); } } break; case HSSFCell.CELL_TYPE_FORMULA:// 导入时如果为公式生成的数据则无值 if (!cell.getStringCellValue().equals("")) { value = cell.getStringCellValue(); } else { value = cell.getNumericCellValue() + ""; } break; case HSSFCell.CELL_TYPE_BLANK: break; case HSSFCell.CELL_TYPE_ERROR: value = ""; break; case HSSFCell.CELL_TYPE_BOOLEAN: value = (cell.getBooleanCellValue() == true ? "Y" : "N"); break; default: value = ""; } } if (columnIndex == 0 && value.trim().equals("")) { break; } values[columnIndex] = rightTrim(value); hasValue = true; } if (hasValue) { result.add(values); } } } return result; } /** * 去掉字符串右边的空格 * * @param str要处理的字符串 * @return 处理后的字符串 */ public static String rightTrim(String str) { if (str == null) { return ""; } int length = str.length(); for (int i = length - 1; i >= 0; i--) { if (str.charAt(i) != 0x20) { break; } length--; } return str.substring(0, length); } /** * 字符串转Date * 字符串格式为:2016/03/26 * <p>Description: </p> * @param str * @return * @date 2016年3月26日下午4:20:46 */ public static Date strToDate(Object str) { Date date = null; try { date = sdf.parse(str != null ? str .toString().replaceAll("/", "-") : null); } catch (ParseException e) { logger.error(e.getMessage(), e); } return date; } }
调用方法：
File file = new File("F:/upload/a.xlsx");
ExcelUtil<Payable> excelUtil = new ExcelUtil<Payable>();
List<Payable> payables = excelUtil.excel2OJavaBean(file, Payable.class);
for(Payable payable : payables){
System.out.println(JSON.toJSON(payable));
}
打印结果：
{"acceptDate":1454085600000,"amount":55555,"buyerMsg":"aaaaaaa","buyerPayableId":"AAAAAAAAAA","isOK":false,"payableDate":1453737600000,"supplierMsg":"ddddddddd","supplierName":"A供应商","terraceProductId":"001"}
{"acceptDate":1454086200000,"amount":66666,"buyerMsg":"bbbbbbb","buyerPayableId":"BBBBBBBBBB","isOK":true,"payableDate":1453737600000,"supplierMsg":"ddddddddd","supplierName":"B供应商","terraceProductId":"001"}
{"acceptDate":1454084400000,"amount":77777,"buyerMsg":"ccccccc","buyerPayableId":"CCCCCCCCCC","isOK":false,"payableDate":1453737600000,"supplierMsg":"ddddddddd","supplierName":"C供应商","terraceProductId":"001"}
技术点：
使用到POI读取Excel文件，利用反射技术将Excel文件列数据赋给对象属性（要求Excel列字段顺序与对象属性顺序一致），将对象封装成List<T>返回。
Excel支持2003和2007，其他版本未测试，支持 Date、Integer、Double、Float、Boolean类型