POI读取Excel(兼容Excel2003、Excel2007)

/**

* ClassName:ExcelReader.java

* Author: wenbin.ji

* CreateTime: Jan 28, 2011 11:16:29 AM

* Description:Excel数据读取工具类，POI实现，兼容Excel2003，及Excel2007

**/

package com.company.utils;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

import org.apache.poi.ss.usermodel.FormulaEvaluator;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.DateUtil;

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.ss.usermodel.WorkbookFactory;

public class ExcelReader {

Workbook wb = null;

List<String[]> dataList = new ArrayList<String[]>(100);

public ExcelReader(String path){

try {

InputStream inp = new FileInputStream(path);

wb = WorkbookFactory.create(inp);

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (InvalidFormatException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

/**

* 取Excel所有数据，包含header

* @return List<String[]>

*/

public List<String[]> getAllData(int sheetIndex){

int columnNum = 0;

Sheet sheet = wb.getSheetAt(sheetIndex);

if(sheet.getRow(0)!=null){

columnNum = sheet.getRow(0).getLastCellNum()-sheet.getRow(0).getFirstCellNum();

}

if(columnNum>0){

for(Row row:sheet){

String[] singleRow = new String[columnNum];

int n = 0;

for(int i=0;i<columnNum;i++){

Cell cell = row.getCell(i, Row.CREATE_NULL_AS_BLANK);

switch(cell.getCellType()){

case Cell.CELL_TYPE_BLANK:

singleRow
= "";

break;

case Cell.CELL_TYPE_BOOLEAN:

singleRow
= Boolean.toString(cell.getBooleanCellValue());

break;

//数值

case Cell.CELL_TYPE_NUMERIC:

if(DateUtil.isCellDateFormatted(cell)){

singleRow
= String.valueOf(cell.getDateCellValue());

}else{

cell.setCellType(Cell.CELL_TYPE_STRING);

String temp = cell.getStringCellValue();

//判断是否包含小数点，如果不含小数点，则以字符串读取，如果含小数点，则转换为Double类型的字符串

if(temp.indexOf(".")>-1){

singleRow
= String.valueOf(new Double(temp)).trim();

}else{

singleRow
= temp.trim();

}

}

break;

case Cell.CELL_TYPE_STRING:

singleRow
= cell.getStringCellValue().trim();

break;

case Cell.CELL_TYPE_ERROR:

singleRow
= "";

break;

case Cell.CELL_TYPE_FORMULA:

cell.setCellType(Cell.CELL_TYPE_STRING);

singleRow
= cell.getStringCellValue();

if(singleRow
!=null){

singleRow
= singleRow
.replaceAll("#N/A","").trim();

}

break;

default:

singleRow
= "";

break;

}

n++;

}

if("".equals(singleRow[0])){continue;}//如果第一行为空，跳过

dataList.add(singleRow);

}

}

return dataList;

}

/**

* 返回Excel最大行index值，实际行数要加1

* @return

*/

public int getRowNum(int sheetIndex){

Sheet sheet = wb.getSheetAt(sheetIndex);

return sheet.getLastRowNum();

}

/**

* 返回数据的列数

* @return

*/

public int getColumnNum(int sheetIndex){

Sheet sheet = wb.getSheetAt(sheetIndex);

Row row = sheet.getRow(0);

if(row!=null&&row.getLastCellNum()>0){

return row.getLastCellNum();

}

return 0;

}

/**

* 获取某一行数据

* @param rowIndex 计数从0开始，rowIndex为0代表header行

* @return

*/

public String[] getRowData(int sheetIndex,int rowIndex){

String[] dataArray = null;

if(rowIndex>this.getColumnNum(sheetIndex)){

return dataArray;

}else{

dataArray = new String[this.getColumnNum(sheetIndex)];

return this.dataList.get(rowIndex);

}

}

/**

* 获取某一列数据

* @param colIndex

* @return

*/

public String[] getColumnData(int sheetIndex,int colIndex){

String[] dataArray = null;

if(colIndex>this.getColumnNum(sheetIndex)){

return dataArray;

}else{

if(this.dataList!=null&&this.dataList.size()>0){

dataArray = new String[this.getRowNum(sheetIndex)+1];

int index = 0;

for(String[] rowData:dataList){

if(rowData!=null){

dataArray[index] = rowData[colIndex];

index++;

}

}

}

}

return dataArray;

}

}