最近因为项目需要,写了一个java读excel文件的例子,里面有对日期和对公式的读取,开始的时候还真的费了不少的工夫呢,呵呵。后来知其然了之后,总算略有小成,姑且贴出来与大家共享。
不过目前还是有一个waring:就是读取merge型数据的时候报[WARNING] Unknown Ptg 2d (45) 不知谁有解决的办法,我先扔块砖,有玉的尽管砸过来就是了。
package com.zzxy.model;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.DecimalFormat;
import java.util.Date;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.record.formula.AreaPtg;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.record.CalcCountRecord;
/**
*
* author
*
* java读取excel文件
*
* 一个Excel文件的层次:Excel文件->工作表->行->单元格 对应到POI中,为:workbook->sheet->row->cell
*
*/
public class POItest {
public static String outputFile = "c:\\Temp\\test.xls";
public static String fileToBeRead = "c:\\Temp\\test.xls";
public void CreateExcel() {
try {
// 创建新的Excel 工作簿
HSSFWorkbook workbook = new HSSFWorkbook();
// 在Excel工作簿中建一工作表,其名为缺省值
// 如要新建一名为"效益指标"的工作表,其语句为:
// HSSFSheet sheet = workbook.createSheet("效益指标");
HSSFSheet sheet = workbook.createSheet();
// 在索引0的位置创建行(最顶端的行)
HSSFRow row = sheet.createRow((short) 0);
//在索引0的位置创建单元格(左上端)
HSSFCell cell = row.createCell((short) 0);
// 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.setCellValue("sweater");
// 新建一输出文件流
FileOutputStream fOut = new FileOutputStream(outputFile);
// 把相应的Excel 工作簿存盘
workbook.write(fOut);
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);
}
}
/**
* 读取excel,遍历各个小格获取其中信息,并判断其是否是手机号码,并对正确的手机号码进行显示
*
* 注意: 1.sheet, 以0开始,以workbook.getNumberOfSheets()-1结束
* 2.row,以0开始(getFirstRowNum),以getLastRowNum结束
* 3.cell,以0开始(getFirstCellNum),以getLastCellNum结束, 结束的数目不知什么原因与显示的长度不同,可能会偏长
*/
public void readExcel() {
//将被表示成1.3922433397E10的数转化为13922433397
//DecimalFormat df = new DecimalFormat("#");
try {
// 创建对Excel工作簿文件的引用
HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(
fileToBeRead));
//System.out.println("===SheetsNum===" + workbook.getNumberOfSheets());//获取sheet数
for (int numSheets = 0; numSheets < workbook.getNumberOfSheets(); numSheets++) {
if (null != workbook.getSheetAt(numSheets)) {
HSSFSheet aSheet = workbook.getSheetAt(numSheets);//获得一个sheet
if(!aSheet.isDisplayFormulas())//判断是显示aSheet中公式的值
aSheet.setDisplayFormulas(true);
//System.out.println("+++getFirstRowNum+++" + aSheet.getFirstRowNum());
//System.out.println("+++getLastRowNum+++" + aSheet.getLastRowNum());
for (int rowNumOfSheet = 0; rowNumOfSheet <= aSheet
.getLastRowNum(); rowNumOfSheet++) {
if (null != aSheet.getRow(rowNumOfSheet)) {
HSSFRow aRow = aSheet.getRow(rowNumOfSheet);
//System.out.println(">>>getFirstCellNum<<<"+aRow.getFirstCellNum());
//System.out.println(">>>getLastCellNum<<<"+aRow.getLastCellNum());
for (short cellNumOfRow = 0; cellNumOfRow <= aRow
.getLastCellNum(); cellNumOfRow++) {
//System.out.println(">>>rowNumOfSheet<<<"+rowNumOfSheet);
//System.out.println(">>>cellNumOfRow<<<"+cellNumOfRow);
if (null != aRow.getCell(cellNumOfRow)) {
HSSFCell aCell = aRow.getCell(cellNumOfRow);
int cellType = aCell.getCellType();
switch (cellType) {
case HSSFCell.CELL_TYPE_NUMERIC://Numeric
String strCell =String.valueOf(aCell.getNumericCellValue());
if(HSSFDateUtil.isCellDateFormatted(aCell))
{
//double sa = aCell.getNumericCellValue();
//Date dd = HSSFDateUtil.getJavaDate(sa);
//HSSFDataFormat tt = new HSSFDataFormat(workbook);
//dd.toString();
System.out.println(aCell.getDateCellValue());
}
else
System.out.println(strCell);
break;
case HSSFCell.CELL_TYPE_STRING://String
strCell = aCell.getStringCellValue();
System.out.println(strCell);
break;
case HSSFCell.CELL_TYPE_FORMULA://formula
//strCell =aCell.getCellFormula();
strCell = String.valueOf(aCell.getNumericCellValue());
System.out.println(strCell);
break;
case HSSFCell.CELL_TYPE_BLANK://blank
strCell = aCell.getStringCellValue();
System.out.println(strCell);
break;
default:
System.out.println("----------------格式读入不正确!");//其它格式的数据
}
}
}
}
}
}
System.out.println("//////////////////////////////sheet end///////////////////////////////////////////");
}
} catch (Exception e) {
System.out.println("ReadExcelError" + e);
}
}
//阅读指定行和列的单元格的值,注意:行、列下标是从0开始的
public void getSpecial(short numRow ,short numCol) {
try {
// 创建对Excel工作簿文件的引用
HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(fileToBeRead));
if (null != workbook.getSheetAt(0)) {
HSSFSheet aSheet = workbook.getSheetAt(0);//获得一个sheet
if (null != aSheet.getRow(numRow)) {
HSSFRow aRow = aSheet.getRow(numRow);
if (null != aRow.getCell(numCol)) {
HSSFCell aCell = aRow.getCell(numCol);
int cellType = aCell.getCellType();
switch (cellType) {
case 0://Numeric
String strCell =String.valueOf(aCell.getNumericCellValue());
if(HSSFDateUtil.isCellDateFormatted(aCell))
System.out.println("00000000000000000"+aCell.getDateCellValue());
else
System.out.println(strCell);
break;
case 1://String
strCell = aCell.getStringCellValue();
System.out.println("111111111111111111"+strCell);
break;
case 2://formula
aSheet.setDisplayFormulas(true);
strCell = String.valueOf(aCell.getNumericCellValue());
System.out.println("2222222222222222222"+strCell);
break;
case 3://blank
strCell = aCell.getStringCellValue();
System.out.println("3333333333333333333"+strCell);
break;
default:
System.out.println("----------------格式读入不正确!");//其它格式的数据
}
}
}
}
} catch (Exception e) {
System.out.println("ReadExcelError" + e);
}
}
public static void main(String[] args) {
POItest poi = new POItest();
//poi.CreateExcel();
poi.readExcel();
poi.getSpecial((short)4,(short)4);//第五行第五列的数据值
}
}
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