java动态导出excel压缩成zip下载的方法

package pack.java.io.demo;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.UnderlineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
 
/**
 * zip压缩文件实例
 * add by 周海涛
 * @author Administrator
 *
 */
public class ZipDemo {
 
 /**
 * @param args
 * @throws IOException 
 * @throws WriteException 
 * @throws RowsExceededException 
 */
 public static void main(String[] args) throws RowsExceededException, WriteException, IOException {
 String path = "C:/document/excel";
 //创建文件夹;
 createFile(path);
 //创建Excel文件;
 createExcelFile(path);
 //生成.zip文件;
 craeteZipPath(path);
 //删除目录下所有的文件;
 File file = new File(path);
 //删除文件;
 deleteExcelPath(file);
 //重新创建文件;
 file.mkdirs();
 }
 
 /**
 * 创建文件夹;
 * @param path
 * @return
 */
 public static String createFile(String path){
 File file = new File(path);
 //判断文件是否存在;
 if(!file.exists()){
  //创建文件;
  boolean bol = file.mkdirs();
  if(bol){
  System.out.println(path+" 路径创建成功!");
  }else{
  System.out.println(path+" 路径创建失败!");
  }
 }else{
  System.out.println(path+" 文件已经存在!");
 }
 return path;
 }
 
 /**
 * 在指定目录下创建Excel文件;
 * @param path
 * @throws IOException 
 * @throws WriteException 
 * @throws RowsExceededException 
 */
 public static void createExcelFile(String path) throws IOException, RowsExceededException, WriteException{
 for(int i =0;i<3;i++){
  //创建Excel;
  WritableWorkbook workbook = Workbook.createWorkbook(new File(path+"/" + new SimpleDateFormat("yyyyMMddHHmmsss").format(new Date() )+"_"+(i+1)+".xls"));
  //创建第一个sheet文件;
  WritableSheet sheet = workbook.createSheet("导出Excel文件", 0);
  //设置默认宽度;
  sheet.getSettings().setDefaultColumnWidth(30);
  
  //设置字体;
  WritableFont font1 = new WritableFont(WritableFont.ARIAL,14,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.RED);
 
  WritableCellFormat cellFormat1 = new WritableCellFormat(font1);
  //设置背景颜色;
  cellFormat1.setBackground(Colour.BLUE_GREY);
  //设置边框;
  cellFormat1.setBorder(Border.ALL, BorderLineStyle.DASH_DOT);
  //设置自动换行;
  cellFormat1.setWrap(true);
  //设置文字居中对齐方式;
  cellFormat1.setAlignment(Alignment.CENTRE);
  //设置垂直居中;
  cellFormat1.setVerticalAlignment(VerticalAlignment.CENTRE);
  //创建单元格
  Label label1 = new Label(0, 0, "第一行第一个单元格(测试是否自动换行!)",cellFormat1);
  Label label2 = new Label(1, 0, "第一行第二个单元格",cellFormat1);
  Label label3 = new Label(2, 0, "第一行第三个单元格",cellFormat1);
  Label label4 = new Label(3, 0, "第一行第四个单元格",cellFormat1);
  //添加到行中;
  sheet.addCell(label1);
  sheet.addCell(label2);
  sheet.addCell(label3);
  sheet.addCell(label4);
  
  //给第二行设置背景、字体颜色、对齐方式等等;
  WritableFont font2 = new WritableFont(WritableFont.ARIAL,14,WritableFont.NO_BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.BLUE2);
  WritableCellFormat cellFormat2 = new WritableCellFormat(font2);
  cellFormat2.setAlignment(Alignment.CENTRE);
  cellFormat2.setBackground(Colour.PINK);
  cellFormat2.setBorder(Border.ALL, BorderLineStyle.THIN);
  cellFormat2.setWrap(true);
 
  //创建单元格;
  Label label11= new Label(0, 1, "第二行第一个单元格(测试是否自动换行!)",cellFormat2);
  Label label22 = new Label(1, 1, "第二行第二个单元格",cellFormat2);
  Label label33 = new Label(2, 1, "第二行第三个单元格",cellFormat2);
  Label label44 = new Label(3, 1, "第二行第四个单元格",cellFormat2);
 
  sheet.addCell(label11);
  sheet.addCell(label22);
  sheet.addCell(label33);
  sheet.addCell(label44);
 
  //写入Excel表格中;
  workbook.write();
  //关闭流;
  workbook.close();
 }
 }
 
 /**
 * 生成.zip文件;
 * @param path
 * @throws IOException 
 */
 public static void craeteZipPath(String path) throws IOException{
 ZipOutputStream zipOutputStream = null;
 File file = new File(path+new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())+".zip");
 zipOutputStream = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
 File[] files = new File(path).listFiles();
 FileInputStream fileInputStream = null;
 byte[] buf = new byte[1024];
 int len = 0;
 if(files!=null && files.length > 0){
  for(File excelFile:files){
  String fileName = excelFile.getName();
  fileInputStream = new FileInputStream(excelFile);
  //放入压缩zip包中;
  zipOutputStream.putNextEntry(new ZipEntry(path + "/"+fileName));
  
  //读取文件;
  while((len=fileInputStream.read(buf)) >0){
   zipOutputStream.write(buf, 0, len);
  }
  //关闭;
  zipOutputStream.closeEntry();
  if(fileInputStream != null){
   fileInputStream.close();
  }
  }
 }
 
 if(zipOutputStream !=null){
  zipOutputStream.close();
 }
 }
 
 /**
 * 删除目录下所有的文件;
 * @param path
 */
 public static boolean deleteExcelPath(File file){
 String[] files = null;
 if(file != null){
  files = file.list();
 }
 
 if(file.isDirectory()){
  for(int i =0;i