java导入与导出excel，兼容excel2003以及excel2007

java解析Excel（兼容2003及2007）：解析2003及以下使用HSSFWorkbook类，
解析2007及以上使用XSSFWorkbook，
如果解析类与excel版本不对应，抛出相应的异常，例如HSSFWorkbook解析2007：
org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. 
You are calling the part of POI that deals with OLE2 Office Documents. 
You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
XSSF和HSSF虽然在不同的包里，但却都实现了同一接口Workbook，可以先判断excel版本，然后由对应的excel解析类解析，指向同一Workbook变量


程序如下：
/** 
 *               需要导入的jar包 
 *  
 *               poi-3.8-beta3-20110606.jar 
 *  
 *               poi-excelant-3.8-beta3-20110606.jar
 *  
 *               poi-examples-3.8-beta3-20110606.jar 
 *  
 *               poi-ooxml-schemas-3.8-beta3-20110606.jar 
 *  
 *               poi-ooxml-3.8-beta3-20110606.jar  
 *  
 *               poi-scratchpad-3.8-beta3-20110606.jar 
 *  
 *               xmlbeans-2.3.0.jar 
 *  
 *               dom4j-1.6.1.jar 
 *  
 *               所有jar包在poi-bin-3.8-beta3-20110606.zip中，或poi-bin-3.8-20120326.zip
 *
 *
 *               使用3.7版本 
 *  
 *               poi-3.7-20101029.jar
 *  
 *               poi-examples-3.7-20101029.jar
 *  
 *               poi-ooxml-3.7-20101029.jar
 *  
 *               poi-ooxml-schemas-3.7-20101029.jar
 *  
 *               poi-scratchpad-3.7-20101029.jar
 *  
 *               geronimo-stax-api_1.0_spec-1.0.jar
 *  
 *               xmlbeans-2.3.0.jar 
 *  
 *               dom4j-1.6.1.jar 


 *
commons-logging-1.1.jar
 *  
 *               所有jar包在poi-bin-3.7-20101029.zip中，
 *  
 *               下载地址：http://download.csdn.net/detail/javaloveiphone/5821279 或 http://download.csdn.net/detail/javaloveiphone/5821291
 *
  http://archive.apache.org/dist/poi/release/bin/ 或 http://www.java2s.com/Code/Jar/p/Downloadpoiexcelant38beta320110606jar.htm 
 */


程序一：判断Excel版本，选择对应的excel解析类

package com.read.excel;


import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;


import org.apache.poi.POIXMLDocument;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Cell;
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.xssf.usermodel.XSSFWorkbook;


public class ReadExcel {
    /** 错误信息 */  
    private String errorInfo;
    
    /**
     * 验证EXCEL文件是否合法 
     */
    public boolean validateExcel(String filePath){ 
    
    /**判断文件名是否为空或者文件是否存在 */
    if(!CEVUtil.fileExist(filePath)){
    errorInfo = "文件不存在";
    return false; 
    }
    
        /**检查文件是否是Excel格式的文件 */  
        if (!CEVUtil.isExcel(filePath))  {  
            errorInfo = "文件名不是excel格式";  
            return false;  
        } 
        return true;  
    }
    
    /** 
     * @描述：根据文件名读取excel文件 
     */  
    public List> read(String filePath){
        List> dataLst = new ArrayList>();  
        InputStream is = null;  
        try{
            /** 验证文件是否合法 */  
            if (!validateExcel(filePath)){ 
                System.out.println(errorInfo);
                return null;
            }  
            /** 判断文件的类型，是2003还是2007 */  
            boolean isExcel2003 = true; 
            if (CEVUtil.isExcel2007(filePath)){ 
                isExcel2003 = false;  
            }  
            /** 调用本类提供的根据流读取的方法 */  
            is = new FileInputStream(new File(filePath));
            Workbook wb = null;  
            if (isExcel2003){  
                wb = new HSSFWorkbook(is);  
            }else{  
                wb = new XSSFWorkbook(is);  
            }
            is.close();
        }catch (IOException e){  
            e.printStackTrace();  
        }catch (Exception ex){  
            ex.printStackTrace();  
        }finally{  
            if (is != null){  
                try{  
                    is.close();  
                }catch (IOException e){  
                    is = null;  
                    e.printStackTrace();  
                }  
            }  
        }  
        return dataLst;  
    }
    
    /** 
     * @描述：读取数据 
     */  
    private List> read(Workbook wb){  
        List> dataLst = new ArrayList>();
        /**得到总的shell */
        int sheetAccount = wb.getNumberOfSheets();
        /** 得到第一个shell */
        Sheet sheet = wb.getSheetAt(0);  
        /** 得到Excel的行数 */  
        int rowCount = sheet.getPhysicalNumberOfRows();
        /** 也可以通过得到最后一行数*/
        int lastRowNum = sheet.getLastRowNum();
        /** 循环Excel的行 */  
        for (int r = 0; r < rowCount; r++){  
            Row row = sheet.getRow(r);  
            if (row == null){  
                continue;  
            }  
            List rowLst = new ArrayList();  
            /** 循环Excel的列 */  
            for (int c = 0; c < row.getPhysicalNumberOfCells(); c++){  
                Cell cell = row.getCell(c);  
                String cellValue = "";  
                if (null != cell){  
                    // 以下是判断数据的类型  
                    switch (cell.getCellType()){ 
                    //XSSFCell可以达到相同的效果
                   case HSSFCell.CELL_TYPE_NUMERIC: // 数字  
double d = cell.getNumericCellValue();
if (HSSFDateUtil.isCellDateFormatted(cell)) {//日期类型
// Date date = cell.getDateCellValue();
Date date = HSSFDateUtil.getJavaDate(d);
cellValue =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
}else{//数值类型          
cellValue = cell.getNumericCellValue()+"";
}
                       cellValue = cell.getDateCellValue() + "";  
                       break;  
                   case HSSFCell.CELL_TYPE_STRING: // 字符串  
                       cellValue = cell.getStringCellValue();  
                       break;  
                   case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean  
                       cellValue = cell.getBooleanCellValue() + "";  
                       break;  
                   case HSSFCell.CELL_TYPE_FORMULA: // 公式  
                       cellValue = cell.getCellFormula() + "";  
                       break;  
                   case HSSFCell.CELL_TYPE_BLANK: // 空值  
                       cellValue = "";  
                       break;  
                   case HSSFCell.CELL_TYPE_ERROR: // 故障  
                       cellValue = "非法字符";  
                       break;
                   default:  
                       cellValue = "未知类型";  
                       break;  
                    }  
                }  
                System.out.print(cellValue +"\t");
                rowLst.add(cellValue);  
            }
            System.out.println();
            dataLst.add(rowLst);  
        }  
        return dataLst;  
    }  
}


/**
 * 工具类：判断是否为Excel文件，并检查Excel版本
 * @author javaloveiphone
 *
 */ 
class CEVUtil{  
/**
* 依据后缀名判断读取的是否为Excel文件
* @param filePath
* @return
*/
    public static boolean isExcel(String filePath){
    if(filePath.matches("^.+\\.(?i)(xls)$")||filePath.matches("^.+\\.(?i)(xlsx)$")){
    return true;
    }
        return false;
    } 
    
    /** 
     * 检查文件是否存在 
     */  
    public static boolean fileExist(String filePath){
    if(filePath == null || filePath.trim().equals("")) return false;
        File file = new File(filePath);  
        if (file == null || !file.exists()){  
            return false;  
        } 
    return true;
    }
    /**
     * 依据内容判断是否为excel2003及以下
     */
    public static boolean isExcel2003(String filePath){
        try {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(filePath));
if(POIFSFileSystem.hasPOIFSHeader(bis)) {
System.out.println("Excel版本为excel2003及以下");
return true;
}
} catch (IOException e) {
e.printStackTrace();
return false;
}
return false;
    }
    /**
     * 依据内容判断是否为excel2007及以上
     */
    public static boolean isExcel2007(String filePath){
        try {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(filePath));
    if(POIXMLDocument.hasOOXMLHeader(bis)) {
    System.out.println("Excel版本为excel2007及以上");
    return true;
    }
} catch (IOException e) {
e.printStackTrace();
return false;
}
return false;
    }
}  




程序二：无需显示判断版本，直接读取解析
package com.read.excel;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.Map;


import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
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 ReadExcel2 {
public LinkedList> readExcel(String excelPath) throws InvalidFormatException, FileNotFoundException, IOException{
Workbook workbook = WorkbookFactory.create(new FileInputStream(new File(excelPath)));
Sheet sheet = workbook.getSheetAt(0);
int startRowNum = sheet.getFirstRowNum();
int endRowNum = sheet.getLastRowNum();
for(int rowNum = startRowNum;rowNum<=endRowNum;rowNum++){
Row row = sheet.getRow(rowNum);
if(row == null) continue;
int startCellNum = row.getFirstCellNum();
int endCellNum = row.getLastCellNum();
for(int cellNum = startCellNum;cellNum(FileOutputStream.java:194)
at java.io.FileOutputStream.(FileOutputStream.java:84)
at com.write.excel.WriteExcel.writeExcel(WriteExcel.java:45)
at com.write.excel.WriteExcel.main(WriteExcel.java:148)
 */
public class WriteExcel {
// 标题字体
private HSSFFont titleFont = null;
// private XSSFFont titleFont = null; //2007格式


// 标题样式
private HSSFCellStyle titleStyle = null;
// private XSSFCellStyle titleStyle = null;//2007格式

// 行信息内容样式
private HSSFCellStyle contentStyle = null;
// private XSSFCellStyle contentStyle = null;//2007格式

/** 写excel文件
* @throws IOException
*/
public void writeExcel(String[] titleStrs,List contentList,String filename) throws IOException{
FileOutputStream fileOut = new FileOutputStream("C:\\Users\\javaloveiphone\\Desktop\\example.xls");
/*
* severlet响应生成excel文件
* HttpServletResponse response
* 
* // 文件标题
*  String head = new String(filename.getBytes("GB2312"), "ISO-8859-1");
* response.reset();
* response.setContentType("application/vnd.ms-excel");
* response.addHeader("Content-Disposition", "attachment; filename="+ head + ".xls");
*
*  HSSFWorkbook wb = new HSSFWorkbook();
*  。。。。。
*  
*  java.io.OutputStream os = response.getOutputStream();
*  wb.write(os);
*  os.close();
*  
*/

HSSFWorkbook wb = new HSSFWorkbook();// 创建新HSSFWorkbook对象
// XSSFWorkbook wb = new XSSFWorkbook();//2007格式

setExcelStyle(wb);//执行样式初始化

HSSFSheet sheet = wb.createSheet(filename);// 创建新的sheet对象
// XSSFSheet sheet = wb.createSheet(filename);//2007格式

HSSFRow titleRow = sheet.createRow((short) 0);//创建第一行
// XSSFRow titleRow = sheet.createRow((short) 0);//2007格式

// titleRow.setHeight((short)300);//设置行高,设置太小可能被隐藏看不到
titleRow.setHeightInPoints(20);//20像素
int titleCount = titleStrs.length;// 列数
// 写标题
for (int k = 0; k < titleCount; k++) {
HSSFCell cell = titleRow.createCell((short) k); // 新建一个单元格
// XSSFCell cell = titleRow.createCell((short) k); //2007格式

// cell.setEncoding(HSSFCell.ENCODING_UTF_16); // 中文字符集转换
cell.setCellStyle(titleStyle);//设置标题样式
// cell.setCellValue(new HSSFRichTextString(titleStrs[k])); // 为单元格赋值
// cell.setCellValue(wb.getCreationHelper().createRichTextString(""));
            cell.setCellType(HSSFCell.CELL_TYPE_STRING);
            cell.setCellValue(titleStrs[k]); 
            sheet.setColumnWidth((short)k, (short)5000);//设置列宽
}

int contentCount = contentList.size();//总的记录数
// 写内容
for (int i = 0; i < contentCount; i++) {
String [] contents = contentList.get(i);
HSSFRow row = sheet.createRow((short)(i + 1)); // 新建一行
// XSSFRow row = sheet.createRow((short)(i + 1)); // //2007格式

for (int j = 0; j < titleCount; j++) {
HSSFCell cell = row.createCell((short) j); // 新建一个单元格
// XSSFCell cell = row.createCell((short) j); // //2007格式

cell.setCellStyle(contentStyle);//设置内容样式
if (contents[j] == null || contents[j].equals("null")) {
contents[j] = "";
}
//格式化日期
if(j == 2){
HSSFCellStyle style = wb.createCellStyle();
// XSSFCellStyle style = wb.createCellStyle();//2007格式
style.setDataFormat(wb.getCreationHelper().createDataFormat().getFormat("yyyy-mm-dd hh:mm:ss"));
// cell.setCellValue(new Date());
// cell.setCellValue(Calendar.getInstance());
cell.setCellValue(contents[j]);
cell.setCellStyle(style);
}else{
cell.setCellValue(new HSSFRichTextString(contents[j]));
}
}
}
wb.write(fileOut);
fileOut.flush();
fileOut.close();
}
/** 样式初始化*/
public void setExcelStyle(HSSFWorkbook workBook){
// 设置列标题字体，样式
titleFont = workBook.createFont();
titleFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 标题列样式
titleStyle = workBook.createCellStyle();
titleStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); // 设置边框
titleStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
titleStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
titleStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
titleStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
titleStyle.setFont(titleFont);
// 内容列样式
contentStyle = workBook.createCellStyle();
contentStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
contentStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
contentStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
contentStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);
}

/** 测试*/
public static void main(String[] args) {
WriteExcel we = new WriteExcel();
String [] titleStrs = {"部门","城市","日期","金额"};

List contentList = new ArrayList();
String [] contents1 = {"财务部","北京","2013-07-25","1000.25"};
String [] contents2 = {"销售部","深圳","2013-08-01","0.099"};
String [] contents3 = {"产品部","天津","2013-11-17","18888888"};
String [] contents4 = {"市场部","上海","2013-12-10","5658978987.135454的"};
contentList.add(contents1);
contentList.add(contents2);
contentList.add(contents3);
contentList.add(contents4);

String filename = "WriteExcel";
try {
we.writeExcel(titleStrs, contentList, filename);
} catch (IOException e) {
e.printStackTrace();
}
}
}
http://blog.csdn.net/u011247211/article/details/12175329