文件压缩下载 和 解压缩并解析

Posted 2020-12-12 lifan12589

package com.utils.file;

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.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class ZipUtil {
    
        private ZipUtil() {
            
        }
        
        /**
         * pdf  压缩下载
         * @param response
         * @throws IOException
         */
        @ResponseBody
        @RequestMapping("/zipDownload.do")
        public static void downZipFile(HttpServletRequest request, HttpServletResponse res){
            String basePath="C:\Users\Desktop\2020.pdf";
            File file = new File(basePath);
            File file1=new File("C:\Users\Desktop\2020.zip");
            File files=new File("C:\Users\Desktop");
            if(!files.exists()){
            files.mkdirs();
            }
            if(!file1.exists()){
            try {
                file1.createNewFile();
            } catch (IOException e){
                System.out.println("记录日志");
                return;
                }
            }
        try (
        ZipOutputStream zip=new ZipOutputStream(new FileOutputStream(file1));//zip的临时存放地址
        ServletOutputStream outputStream = res.getOutputStream();
        FileInputStream in=new FileInputStream(file1);
        BufferedInputStream ins=new BufferedInputStream(in);){
        //读取zip 大文件的时候 记得添加缓冲区
//        File[] listFiles = file.listFiles();
//        createZipFile(listFiles,zip);
        //创建 zip文件
        createZipFile(file,zip);
         zip.close();
         res.setContentType("text/html; charset=UTF-8"); //设置编码字符  
         res.setContentType("application/octet-stream"); //设置内容类型为下载类型  
         res.setHeader("Content-disposition", "attachment;filename=tes.zip");//设置下载的压缩文件名称
        
         byte [] buff=new byte[1024];//记得一定要有缓存池
         int i=0;
         while((i=ins.read(buff))>0){
        outputStream.write(buff,0,i);
        }
         outputStream.flush();
        } catch (Exception e) {
        System.out.println("记录日志");

        return;
        }finally {
        //创造的临时文件夹删除
        if(file1.exists()){
        file1.delete();
        }
    }
}

//    private static void createZipFile(File [] listFiles,ZipOutputStream zip){
    private static void createZipFile(File file,ZipOutputStream zip){
//        for (File file : listFiles) {
//是文件
            if(file.isFile()){
                try(BufferedInputStream buffer=new BufferedInputStream(new FileInputStream(file));){
                ZipEntry zipEntry=new ZipEntry(file.getName());
                zip.putNextEntry(zipEntry);
                byte [] buff=new byte[2048];
                int i=0;
                while((i=buffer.read(buff))>0){
                    zip.write(buff,0,i);
                }
                zip.closeEntry();
                }catch(Exception e){
                    e.printStackTrace();
                }
                }else{
//                    File listFiles2 = file.listFiles();
//                    createZipFile(listFiles2,zip);
                    createZipFile(file,zip);
                }
            }
//        }

    
    
//==========================================================================
    //zip文件解压缩并解析
    
    
    public static List<String> unzip(String zipFilePath,String outPutDirectory){//输入源zip路径   和 解压文件路径
        List<String> fileList = new ArrayList<String>();
        try {
            ZipInputStream zin = new ZipInputStream(new FileInputStream(zipFilePath));
            BufferedInputStream bin = new BufferedInputStream(zin);
            BufferedOutputStream bout = null;
            File file=null;  
            ZipEntry entry;
            try {
                while((entry = zin.getNextEntry())!=null && !entry.isDirectory()){
                    file = new File(outPutDirectory,entry.getName());  
                    if(!file.exists()){  
                        (new File(file.getParent())).mkdirs();  
                    }
                    bout = new BufferedOutputStream(new FileOutputStream(file));  
                    int b;
                    while((b=bin.read())!=-1){  
                        bout.write(b);  
                    }
                    bout.flush();
                    fileList.add(file.getAbsolutePath());
                    System.out.println(file+"解压成功");
                }
            } catch (IOException e) {  
                e.printStackTrace();  
            }finally{
                try {
                    bin.close();
                    zin.close();
                    if(bout!=null){
                        bout.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }  
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();  
        }
        return fileList;
    }
    
            public static void main(String[] args) {
                
                String zipFilePath = "C:\Users\Desktop\pay\2020.zip";
                String outPutDirectory = "C:\Users\Desktop\pay";
                unzip(zipFilePath,outPutDirectory);
        }

}