JAVA使用POI操作excel
JAVA使用POI操作excel2007 和 excel2003
日期格式和数字格式好像不好区分~~悲惨 ....
jar包下载：
http://mirror.bjtu.edu.cn/apache//poi/dev/bin/poi-bin-3.8-beta3-20110606.tar.gz
测试代码
import java.io.FileInputStream;
import java.io.IOException;
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.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 PoiTest
{
/**
* 说明
*
* @param args
* @author
* @throws IOException
* @date 2011-7-28 上午06:21:43
*/
public static void main(String[] args) throws IOException
{
// read2007("aaa.xlsx");
read2003("bbb.xls");
}
public static void read2003(String strPath) throws IOException
{
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
Workbook xwb = new HSSFWorkbook(new FileInputStream(strPath));
// sheet 的个数
int sheets = xwb.getNumberOfSheets();
// 读取第一章表格内容
HSSFSheet sheet = (HSSFSheet) xwb.getSheetAt(0);
// 定义 row、cell
HSSFRow row;
String cellStr;
// 循环输出表格中的内容
for (int i = sheet.getFirstRowNum(); i < sheet.getPhysicalNumberOfRows(); i++)
{
row = sheet.getRow(i);
for (int j = row.getFirstCellNum(); j < row.getPhysicalNumberOfCells(); j++)
{
// 通过 row.getCell(j).toString() 获取单元格内容，
cellStr = row.getCell(j).toString();
// System.out.print(cellStr);
HSSFCell cell = row.getCell(j);
switch (cell.getCellType())
{
case HSSFCell.CELL_TYPE_NUMERIC:
System.out.print(cell.getNumericCellValue());
if (HSSFDateUtil.isCellDateFormatted(cell))
{
// 判断方法听说只有在2003下可以，2007判断不对头
System.out.print(DateUtil.getJavaDate(cell.getNumericCellValue()));
System.out.println(cell.getDateCellValue());
}
System.out.print("(NUMERIC)");
break;
case HSSFCell.CELL_TYPE_STRING:
System.out.print(cell.getStringCellValue());
System.out.print("(STRING)");
// value = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_BLANK:
System.out.print("(BLANK)");
break;
default:
System.out.print(row.getCell(j).toString());
System.out.print("(default)");
}
System.out.print("\t");
}
System.out.println("");
}
}
public static void read2007(String strPath) throws IOException
{
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
Workbook xwb = new XSSFWorkbook(strPath);
// sheet 的个数
int sheets = xwb.getNumberOfSheets();
// 读取第一章表格内容
XSSFSheet sheet = (XSSFSheet) xwb.getSheetAt(0);
// 定义 row、cell
XSSFRow row;
String cellStr;
// 循环输出表格中的内容
for (int i = sheet.getFirstRowNum(); i < sheet.getPhysicalNumberOfRows(); i++)
{
row = sheet.getRow(i);
for (int j = row.getFirstCellNum(); j < row.getPhysicalNumberOfCells(); j++)
{
// 通过 row.getCell(j).toString() 获取单元格内容，
cellStr = row.getCell(j).toString();
// System.out.print(cellStr);
XSSFCell cell = row.getCell(j);
switch (cell.getCellType())
{
case HSSFCell.CELL_TYPE_NUMERIC:
System.out.print(cell.getNumericCellValue());
if (HSSFDateUtil.isCellDateFormatted(cell))
{
// 判断方法听说只有在2003下可以，2007判断不对头
System.out.print(DateUtil.getJavaDate(cell.getNumericCellValue()));
System.out.println(cell.getDateCellValue());
}
System.out.print("(NUMERIC)");
break;
case HSSFCell.CELL_TYPE_STRING:
System.out.print(cell.getStringCellValue());
System.out.print("(STRING)");
// value = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_BLANK:
System.out.print("(BLANK)");
break;
default:
System.out.print(row.getCell(j).toString());
System.out.print("(default)");
}
System.out.print("\t");
}
System.out.println("");
}
}
}
下面是兼容2003和2007的代码 ，已测试
转自：http://blog.csdn.net/jack0511/article/details/6179593
/**
* 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
**/
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
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 static void main(String[] args)
{
ExcelReader e = new ExcelReader("aaa.xlsx");
// ExcelReader e = new ExcelReader("bbb.xls");
System.out.println(e.getRowNum(0));
List<String[]> list = e.getAllData(0);
for (String[] s : list)
{
System.out.println(Arrays.asList(s).toString());
}
}
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[n] = "";
break;
case Cell.CELL_TYPE_BOOLEAN:
singleRow[n] = Boolean.toString(cell.getBooleanCellValue());
break;
// 数值
case Cell.CELL_TYPE_NUMERIC:
if (DateUtil.isCellDateFormatted(cell))
{
singleRow[n] = 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[n] = String.valueOf(new Double(temp)).trim();
} else
{
singleRow[n] = temp.trim();
}
}
break;
case Cell.CELL_TYPE_STRING:
singleRow[n] = cell.getStringCellValue().trim();
break;
case Cell.CELL_TYPE_ERROR:
singleRow[n] = "";
break;
case Cell.CELL_TYPE_FORMULA:
cell.setCellType(Cell.CELL_TYPE_STRING);
singleRow[n] = cell.getStringCellValue();
if (singleRow[n] != null)
{
singleRow[n] = singleRow[n].replaceAll("#N/A", "").trim();
}
break;
default:
singleRow[n] = "";
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;
}
}