转载自 ： http://my.oschina.net/u/658145/blog/268112
首先说一下所使用的POI版本3.8，需要用的的Jar包：
dom4j-1.6.1.jar
poi-3.8-20120326.jar
poi-ooxml-3.8-20120326.jar
poi-ooxml-schemas-3.8-20120326.jar
poi-scratchpad-3.8-20120326.jar
xmlbeans-2.3.0.jar
代码示例
package com.project.excel.poi;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;
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.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
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.openxml4j.exceptions.InvalidFormatException;
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.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelUtil {
public static void main(String[] args){
String path2003 = "";//Excel2003文件路径
String path2007 = "";//Excel2007文件路径
path2003 = System.getProperties().getProperty("user.dir")+File.separator+"Excel"+File.separator+"user_2003.xls";
path2007 = System.getProperties().getProperty("user.dir")+File.separator+"Excel"+File.separator+"user_2007.xlsx";
long start2003 = System.currentTimeMillis();
System.out.println("Excel文件路径："+path2003);
List<User> list2003 = parseExcel(path2003);
System.out.println("解析2003输出总人数："+list2003.size());
long end2003 = System.currentTimeMillis();
System.out.println("解析Excel2003完毕！共用时"+(end2003-start2003)+"毫秒！");
long start2007 = System.currentTimeMillis();
System.out.println("Excel文件路径："+path2007);
List<User> list2007 = parseExcel(path2007);
System.out.println("解析2007输出总人数："+list2007.size());
long end2007 = System.currentTimeMillis();
System.out.println("解析Excel完毕！共用时"+(end2007-start2007)+"毫秒！");
System.out.println("》》》》》》》》》》开始执行Excel文件导出：");
buildXSLExcel();//导出Excel 2003
buildXSLXExcel();//导出Excel 2007
}
/**
* 根据路径加载解析Excel
* @param path
* @return
*/
public static List<User> parseExcel(String path){
List<User> list = new ArrayList<User>();
File file = null;
InputStream input = null;
Workbook workBook = null;
Sheet sheet = null;
if(path!=null&&path.length()>7){
//判断文件是否是Excel(2003、2007)
String suffix = path.substring(path.lastIndexOf("."),path.length());
if (".xls".equals(suffix) || ".xlsx".equals(suffix)) {// 2003后缀或2007后缀
file = new File(path);
try {
input = new FileInputStream(file);
} catch (FileNotFoundException e) {
System.out.println("未找到指定的文件！");
e.printStackTrace();
} catch (Exception e) {
System.out.println("读取Excel文件发生异常！");
e.printStackTrace();
}
if(!input.markSupported()){
input = new PushbackInputStream(input,8);
}
try{
if(POIFSFileSystem.hasPOIFSHeader(input) || POIXMLDocument.hasOOXMLHeader(input)){
workBook = WorkbookFactory.create(input);
}else{
System.out.println("非法的输入流：当前输入流非OLE2流或OOXML流！");
}
} catch(IOException e){
System.out.println("创建表格工作簿对象发生IO异常！原因："+e.getMessage());
e.printStackTrace();
} catch(InvalidFormatException e){
//Your InputStream was neither an OLE2 stream, nor an OOXML stream.
System.out.println("非法的输入流：当前输入流非OLE2流或OOXML流！");
e.printStackTrace();
}
try{
if(workBook!=null){
int numberSheet = workBook.getNumberOfSheets();
if(numberSheet>0){
sheet = workBook.getSheetAt(0);//获取第一个工作簿(Sheet)的内容【注意根据实际需要进行修改】
list = getExcelContent(sheet);
}else{
System.out.println("目标表格工作簿(Sheet)数目为0！");
}
}
input.close();
}catch(IOException e){
System.out.println("关闭输入流异常！"+e.getMessage());
e.printStackTrace();
}
}else{
System.out.println("非法的Excel文件后缀！");
}
}else{
System.out.println("非法的文件路径!");
}
return list;
}
/**
* 解析(读取)Excel内容
* @param sheet
* @return
*/
@SuppressWarnings("static-access")
public static List<User> getExcelContent(Sheet sheet){
List<User> list = new ArrayList<User>();
int rowCount = sheet.getPhysicalNumberOfRows();//总行数
if(rowCount>1){
Row titleRow = sheet.getRow(0);//标题行
for(int i=1;i<rowCount;i++){//遍历行，略过标题行，从第二行开始
Row row = sheet.getRow(i);
User entity = new User();
for(int j=0;j<3;j++){
Cell cell = row.getCell(j);
if(titleRow.getCell(j).getStringCellValue().indexOf("姓名")>=0){
if(cell!=null && cell.getCellType()==cell.CELL_TYPE_STRING){
entity.setName(cell.getStringCellValue().trim());
}
}
if(titleRow.getCell(j).getStringCellValue().indexOf("性别")>=0){
if(cell!=null && cell.getCellType()==cell.CELL_TYPE_STRING){
entity.setSex(cell.getStringCellValue().trim());
}
}
if(titleRow.getCell(j).getStringCellValue().indexOf("年龄")>=0){
if(cell!=null && cell.getCellType()==cell.CELL_TYPE_NUMERIC){
entity.setAge((int)cell.getNumericCellValue());
}else if(cell!=null && cell.getCellType()==cell.CELL_TYPE_STRING){
entity.setAge(Integer.parseInt(cell.getStringCellValue().trim()));
}
}
}
list.add(entity);
}
}
return list;
}
/**
* 生成2003 Excel
*/
public static void buildXSLExcel(){
SimpleDateFormat format = new SimpleDateFormat("yyyyMMddhhmmss");
String now = format.format(new Date());
String basePath = System.getProperties().getProperty("user.dir")+File.separator+"Excel"+File.separator;
String exportFileName = "人员信息导出2003_"+now+".xls";//导出文件名
List<User> list = parseExcel(basePath+"user_2003.xls");
HSSFWorkbook workBook = null;
String[] cellTitle = { "序号" , "姓名" , "性别" , "年龄" };
try {
workBook = new HSSFWorkbook();//创建工作薄
HSSFSheet sheet = workBook.createSheet();
workBook.setSheetName(0, "人员信息");//工作簿名称
HSSFFont font = workBook.createFont();
font.setColor(HSSFFont.COLOR_NORMAL);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
HSSFCellStyle cellStyle = workBook.createCellStyle();//创建格式
cellStyle.setFont(font);
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
//创建第一行标题
HSSFRow titleRow = sheet.createRow((short) 0);//第一行标题
for(int i = 0,size = cellTitle.length; i < size; i++){//创建第1行标题单元格
switch(i){
case 0:
sheet.setColumnWidth(0, 3000);
break;
case 1:
sheet.setColumnWidth(1,4000);
break;
case 2:
sheet.setColumnWidth(2,4000);
break;
case 3:
sheet.setColumnWidth(3,2000);
break;
}
HSSFCell cell = titleRow.createCell(i,0);
cell.setCellStyle(cellStyle);
cell.setCellValue(cellTitle[i]);
}
//从第二行开始写入数据
//注：此处如果数据过多，会抛出java.lang.IllegalStateException异常：The maximum number of cell styles was exceeded.
//You can define up to 4000 styles in a .xls workbook。这是是由于cell styles太多create造成，故一般可以把cellstyle设置放到循环外面
if(list!=null && !list.isEmpty()){
HSSFCellStyle style = workBook.createCellStyle();//创建格式
for(int i=0,size=list.size();i<size;i++){
User entity = list.get(i);
HSSFRow row = sheet.createRow((short) i+1);
for (int j = 0,length=cellTitle.length; j < length; j++) {
HSSFCell cell = row.createCell(j, 0);// 在上面行索引0的位置创建单元格
cell.setCellType(HSSFCell.CELL_TYPE_STRING);// 定义单元格为字符串类型
switch(j){// 在单元格中输入一些内容
case 0://序号
cell.setCellValue(i+1);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cell.setCellStyle(style);
break;
case 1://姓名
cell.setCellValue(entity.getName());
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cell.setCellStyle(style);
break;
case 2://性别
cell.setCellValue(String.valueOf(entity.getSex()));
style.setAlignment(HSSFCellStyle.ALIGN_LEFT);
cell.setCellStyle(style);
break;
case 3://年龄
cell.setCellValue(entity.getAge());
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
style.setAlignment(HSSFCellStyle.ALIGN_LEFT);
cell.setCellStyle(style);
break;
}
}
}
}
// 通过文件输出流生成Excel文件
File file = new File(basePath+exportFileName);
FileOutputStream outStream = new FileOutputStream(file);
workBook.write(outStream);
outStream.flush();
outStream.close();
System.out.println("Excel 2003文件导出完成！导出文件路径："+file.getPath());
/***
* Web形式输出Excel
*
*/
/**
// 表示以附件的形式把文件发送到客户端
response.setHeader("Content-Disposition", "attachment;filename=" + new String((exportFileName).getBytes(), "ISO-8859-1"));//设定输出文件头
response.setContentType("application/vnd.ms-excel;charset=UTF-8");// 定义输出类型
// 通过response的输出流把工作薄的流发送浏览器形成文件
OutputStream outStream = response.getOutputStream();
workBook.write(outStream);
outStream.flush();
*/
}catch(IOException e){
System.out.println("生成人员信息Excel发生IO 异常！"+e.getMessage());
e.printStackTrace();
}catch(Exception e){
System.out.println("文件导出发生异常！异常原因："+e.getMessage());
e.printStackTrace();
}
}
/**
* 生成2007 Excel
*/
public static void buildXSLXExcel(){
SimpleDateFormat format = new SimpleDateFormat("yyyyMMddhhmmss");
String now = format.format(new Date());
String basePath = System.getProperties().getProperty("user.dir")+File.separator+"Excel"+File.separator;
String exportFileName = "人员信息导出2007_"+now+".xlsx";//导出文件名
List<User> list = parseExcel(basePath+"user_2003.xls");
XSSFWorkbook workBook = null;
String[] cellTitle = { "序号" , "姓名" , "性别" , "年龄" };
try {
workBook = new XSSFWorkbook();//创建工作薄
XSSFSheet sheet = workBook.createSheet();
workBook.setSheetName(0, "人员信息");//工作簿名称
XSSFFont font = workBook.createFont();
font.setColor(XSSFFont.COLOR_NORMAL);
font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
XSSFCellStyle cellStyle = workBook.createCellStyle();//创建格式
cellStyle.setFont(font);
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
//创建第一行标题
XSSFRow titleRow = sheet.createRow((short) 0);//第一行标题
for(int i = 0,size = cellTitle.length; i < size; i++){//创建第1行标题单元格
switch(i){
case 0:
sheet.setColumnWidth(0, 3000);
break;
case 1:
sheet.setColumnWidth(1,4000);
break;
case 2:
sheet.setColumnWidth(2,4000);
break;
case 3:
sheet.setColumnWidth(3,2000);
break;
}
XSSFCell cell = titleRow.createCell(i,0);
cell.setCellStyle(cellStyle);
cell.setCellType(XSSFCell.CELL_TYPE_STRING);
cell.setCellValue(cellTitle[i]);
}
//从第二行开始写入数据
//注：此处如果数据过多，会抛出java.lang.IllegalStateException异常：The maximum number of cell styles was exceeded.
//You can define up to 4000 styles in a .xls workbook。这是是由于cell styles太多create造成，故一般可以把cellstyle设置放到循环外面
if(list!=null && !list.isEmpty()){
XSSFCellStyle style = workBook.createCellStyle();//创建格式
for(int i=0,size=list.size();i<size;i++){
User entity = list.get(i);
XSSFRow row = sheet.createRow((short) i+1);
for (int j = 0,length=cellTitle.length; j < length; j++) {
XSSFCell cell = row.createCell(j, 0);// 在上面行索引0的位置创建单元格
cell.setCellType(XSSFCell.CELL_TYPE_STRING);// 定义单元格为字符串类型
switch(j){// 在单元格中输入一些内容
case 0://序号
cell.setCellValue(i+1);
style.setAlignment(XSSFCellStyle.ALIGN_CENTER);
cell.setCellStyle(style);
break;
case 1://姓名
cell.setCellValue(entity.getName());
style.setAlignment(XSSFCellStyle.ALIGN_CENTER);
cell.setCellStyle(style);
break;
case 2://性别
cell.setCellValue(String.valueOf(entity.getSex()));
style.setAlignment(XSSFCellStyle.ALIGN_LEFT);
cell.setCellStyle(style);
break;
case 3://年龄
cell.setCellValue(entity.getAge());
cell.setCellType(XSSFCell.CELL_TYPE_NUMERIC);
style.setAlignment(XSSFCellStyle.ALIGN_LEFT);
cell.setCellStyle(style);
break;
}
}
}
}
// 通过文件输出流生成Excel文件
File file = new File(basePath+exportFileName);
FileOutputStream outStream = new FileOutputStream(file);
workBook.write(outStream);
outStream.flush();
outStream.close();
System.out.println("Excel 2007文件导出完成！导出文件路径："+file.getPath());
/***
* Web形式输出Excel
*
*/
/**
// 表示以附件的形式把文件发送到客户端
response.setHeader("Content-Disposition", "attachment;filename=" + new String((exportFileName).getBytes(), "ISO-8859-1"));//设定输出文件头
response.setContentType("application/vnd.ms-excel;charset=UTF-8");// 定义输出类型
// 通过response的输出流把工作薄的流发送浏览器形成文件
OutputStream outStream = response.getOutputStream();
workBook.write(outStream);
outStream.flush();
*/
}catch(IOException e){
System.out.println("生成人员信息Excel发生IO 异常！"+e.getMessage());
e.printStackTrace();
}catch(Exception e){
System.out.println("文件导出发生异常！异常原因："+e.getMessage());
e.printStackTrace();
}
}
}
class User {
private String name;
private String sex;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}