POI读取Excel(兼容Excel2003、Excel2007)

POI读取Excel(兼容Excel2003、Excel2007)

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JAVA 2011-02-11 18:44
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excelstringnullheaderpathclass

[java]
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/**
* 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;

}
}