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 +" ");
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:UsersjavaloveiphoneDesktopexample.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();
}
}
}