java解析Excel（兼容2003及2007）

ava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<List<String>> read(String filePath){

List<List<String>> dataLst = new ArrayList<List<String>>();

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<List<String>> read(Workbook wb){

List<List<String>> dataLst = new ArrayList<List<String>>();

/**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<String> rowLst = new ArrayList<String>();

/** 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<Map<String,
Object>> 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<endCellNum;cellNum++){

Cell cell = row.getCell(cellNum);

if(cell == null) continue;

int type = cell.getCellType();

switch (type) {

case Cell.CELL_TYPE_NUMERIC://数值、日期类型

double d = cell.getNumericCellValue();

if (HSSFDateUtil.isCellDateFormatted(cell)) {//日期类型

// Date date = cell.getDateCellValue();

Date date = HSSFDateUtil.getJavaDate(d);

System.out.print(" "+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date)+" ");

}else{//数值类型

System.out.print(" "+d+" ");

}

break;

case Cell.CELL_TYPE_BLANK://空白单元格

System.out.print(" null ");

break;

case Cell.CELL_TYPE_STRING://字符类型

System.out.print(" "+cell.getStringCellValue()+" ");

break;

case Cell.CELL_TYPE_BOOLEAN://布尔类型

System.out.println(cell.getBooleanCellValue());

break;

case HSSFCell.CELL_TYPE_ERROR: // 故障

System.err.println("非法字符");//非法字符;

break;

default: System.err.println("error");//未知类型

break;

}

}

System.out.println();

}

return null;

}

public static void main(String[] args) {

ReadExcel2 ReadExcel2 = new ReadExcel2();

try {

ReadExcel2.readExcel("C:\\Users\\javaloveiphone\\Desktop\\新建 Microsoft Office Excel 工作表.xlsx");

ReadExcel2.readExcel("C:\\Users\\javaloveiphone\\Desktop\\templateyou.xls");

}catch (InvalidFormatException e) {

e.printStackTrace();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

以上内容整理来源：http://wenku.baidu.com/view/8e5c2531a32d7375a4178080.html
http://blog.csdn.net/mmm333zzz/article/details/7962377
程序三、生成导出excel文件

package com.write.excel;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFRichTextString;

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.xssf.usermodel.XSSFCell;

import org.apache.poi.xssf.usermodel.XSSFRow;

import org.apache.poi.xssf.usermodel.XSSFSheet;

import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**

* 生成excel文件

* @author javaloveiphone

*

*/

/**记录一个异常

* java.io.FileNotFoundException: C:\Users\javaloveiphone\Desktop\example.xls (另一个程序正在使用此文件，进程无法访问。)

at java.io.FileOutputStream.open(Native Method)

at java.io.FileOutputStream.<init>(FileOutputStream.java:194)

at java.io.FileOutputStream.<init>(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<String[]> 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<String[]> contentList = new ArrayList<String[]>();

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();

}

}

}