JavaWeb项目文件夹生成Zip压缩包并下载到本地

1、FileToZip接口类

/**
 *
 */
package com.sale.util;


import java.io.BufferedInputStream;  
import java.io.BufferedOutputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.util.zip.ZipEntry;  
import java.util.zip.ZipOutputStream;  


/**
 * 将文件夹下面的文件
 * 打包成zip压缩文件
 * @author Saffi
 * @date 2017-10-16
 */
public final class FileToZip {  
 
    private FileToZip(){}  
      
    /**
     * 将存放在sourceFilePath目录下的源文件,打包成fileName名称的zip文件,并存放到zipFilePath路径下
     * @param sourceFilePath :待压缩的文件路径
     * @param zipFilePath :压缩后存放路径
     * @param fileName :压缩后文件的名称
     * @return
     * @throws IOException
     */  
    public static boolean fileToZip(String sourceFilePath,String zipFilePath,String fileName) throws IOException{  
        boolean flag = false;  
        File sourceFile = new File(sourceFilePath);  
        FileInputStream fis = null;  
        BufferedInputStream bis = null;  
        FileOutputStream fos = null;  
        ZipOutputStream zos = null;  
        
        if(sourceFile.exists() == false){  
            System.out.println("待压缩的文件目录:"+sourceFilePath+"不存在.");  
        }else{  
            try {  
                File zipFile = new File(zipFilePath + "/" + fileName +".zip");  
                if(zipFile.exists()){  
                    
                    System.out.println(zipFilePath + "目录下存在名字为:" + fileName +".zip" +"打包文件.");  
                }else{  
                    File[] sourceFiles = sourceFile.listFiles();  
                    if(null == sourceFiles || sourceFiles.length<1){  
                        System.out.println("待压缩的文件目录:" + sourceFilePath + "里面不存在文件,无需压缩.");  
                    }else{  
                        
                        fos = new FileOutputStream(zipFile);  
                        zos = new ZipOutputStream(new BufferedOutputStream(fos));  
                        byte[] bufs = new byte[1024*10];  
                        for(int i=0;i<sourceFiles.length;i++){  
                            //创建ZIP实体,并添加进压缩包  
                            ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());  
                            zos.putNextEntry(zipEntry);  
                            
                            //读取待压缩的文件并写进压缩包里  
                            fis = new FileInputStream(sourceFiles[i]);  
                            bis = new BufferedInputStream(fis, 1024*10);  
                            int read = 0;  
                            while((read=bis.read(bufs, 0, 1024*10)) != -1){  
                                zos.write(bufs,0,read);  
                            }  
                            if(null != bis){
                                bis.close();  
                            }
                        }  
                        flag = true;
                        if(null != zos){
                            zos.closeEntry();
                            zos.close();
                        }
                    }  
                }  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
                throw new RuntimeException(e);  
            } catch (IOException e) {  
                e.printStackTrace();  
                throw new RuntimeException(e);  
            } finally{  
                //关闭流  
                try {       
                    if(null != fis){
                        fis.close();
                    }            
                    if(null != fos){
                        fos.close();
                    }
                } catch (IOException e) {  
                    e.printStackTrace();  
                    throw new RuntimeException(e);  
                }  
            }  
        }  
        
        return flag;  
    }   
      

2、调用接口实现生成压缩包并下载

/**
         * 打包Zip并下载
         *
         */
        @RequestMapping("tevo_testzip.action")
        public void downloadZips(HttpServletRequest request,HttpServletResponse response) {

     //原文件地址
                String sourceFilePath = request.getSession().getServletContext().getRealPath("")+"/download/goodsbarcode";  

     //生成Zip存放地址
                String zipFilePath = request.getSession().getServletContext().getRealPath("")+"/download";  

      //文件名
                String fileName = "goodsbarcode";  
                
                try {  
                     //调用FileToZip接口生成压缩包
                    boolean flag = FileToZip.fileToZip(sourceFilePath, zipFilePath, fileName);  
                    if(flag){  
                        System.out.println("文件打包成功!");  
                    }else{  
                        System.out.println("文件打包失败!");  
                    }  

      //Zip压缩包文件名
                    String fileNames = "goodsbarcode.zip";  
                    //Zip压缩包路径
                    String path = request.getSession().getServletContext().getRealPath("")+"/download/goodsbarcode.zip";  
                    File file = new File(path);  
                    if(file.length()<1||file==null){
                         System.out.println("文件不存在!");
                    }else{
                        response.setCharacterEncoding("UTF-8");  
                        response.setHeader("Content-Disposition",  
                                "attachment; filename=" + new String(fileNames.getBytes("ISO8859-1"), "UTF-8"));  
                        response.setContentLength((int) file.length());  
                        response.setContentType("application/zip");// 定义输出类型  
                        FileInputStream fis = new FileInputStream(file);  
                        BufferedInputStream buff = new BufferedInputStream(fis);  
                        byte[] b = new byte[1024];// 相当于我们的缓存  
                        long k = 0;// 该值用于计算当前实际下载了多少字节  
                        OutputStream myout = response.getOutputStream();// 从response对象中得到输出流,准备下载  
                        // 开始循环下载  
                        while (k < file.length()) {  
                            int j = buff.read(b, 0, 1024);  
                            k += j;  
                            myout.write(b, 0, j);  
                        }  
                        // 刷新此输出流并强制将所有缓冲的输出字节被写出
                        myout.flush();  

       //关闭流
                        myout.close();
                        buff.close();
                        fis.close();

       //删除生成的压缩包文件
                        file.delete();  
                    }
                   
                   //删除项目文件夹下所有的图片
                    File filedel = new File(sourceFilePath);  
                   if (filedel.isDirectory()) { //如果path表示的是一个目录
                          
                            File[] fileList = filedel.listFiles();  
                            for (int i = 0; i < fileList.length; i++) {  
                                File delfile = fileList[i];  
                                if (!delfile.isDirectory()) {      //如果文件的不是一个目录,则删除    
                                    //删除文件
                                     delfile.delete();                             
                                }
                            }  
                        }
                } catch (Exception e) {  
                    e.printStackTrace();
                }  
              
}       

原文地址:https://www.cnblogs.com/shoose/p/7681003.html