Java如何把文件夹打成压缩包并导出

目录

• 把文件夹打成压缩包并导出
• 1.打压缩包业务类
• 2.调用工具类
• 生成zip文件并导出
• 总结一下
• 获取下载zip文件流

把文件夹打成压缩包并导出

1.打压缩包业务类

@Controller
public class AdminController {
    private String filePath = AdminController.class.getResource("/").getPath().split("WEB-INF")[0]+ "upload/";
    @RequestMapping(value = "export_zip.htm", method = {RequestMethod.GET, RequestMethod.POST })
    public void zipwordDownAction(HttpServletRequest request,HttpServletResponse response) throws Exception {
        //打包文件的存放路径
        ZipCompressorByAnt zc = new  ZipCompressorByAnt(filePath+ "/file.zip");
        //需要打包的文件路径
        zc.compress(filePath+ "/file/");
        String contentType = "application/octet-stream";
        try {
            //导出压缩包
            download(request, response, "upload/file.zip", contentType,encodeChineseDownloadFileName(request, "file.zip"));
        } catch (Exception e) {
            request.getSession().setAttribute("msg", "暂无内容");
        }
        //如果原压缩包存在,则删除
        File file=new File(filePath+ "/file.zip");
        if(file.exists()){
            file.delete();
        }
    }
    /**
     * 下载文件
     */
    public static void download(HttpServletRequest request,HttpServletResponse response, String storeName, String contentType,String realName) throws Exception {
        response.setContentType("text/html;charset=UTF-8");
        request.setCharacterEncoding("UTF-8");
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        String ctxPath =FileUtil.class.getResource("/").getPath().split("WEB-INF")[0];
        String downLoadPath = ctxPath + storeName;
        long fileLength = new File(downLoadPath).length();
        response.setContentType(contentType);
        response.setHeader("Content-disposition", "attachment; filename="
                + new String(realName.getBytes("utf-8"), "ISO8859-1"));
        response.setHeader("Content-Length", String.valueOf(fileLength));
        bis = new BufferedInputStream(new FileInputStream(downLoadPath));
        bos = new BufferedOutputStream(response.getOutputStream());
        byte[] buff = new byte[2048];
        int bytesRead;
        while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
            bos.write(buff, 0, bytesRead);
        }
        bis.close();
        bos.close();
    }
    /**
     * 对文件流输出下载的中文文件名进行编码 屏蔽各种浏览器版本的差异性
     */
    public static String encodeChineseDownloadFileName(HttpServletRequest request, String pFileName) throws UnsupportedEncodingException {
         String filename = null;
            String agent = request.getHeader("USER-AGENT");
            if (null != agent){
                if (-1 != agent.indexOf("Firefox")) {//Firefox
                    filename = "=?UTF-8?B?" + (new String(org.apache.commons.codec.binary.Base64.encodeBase64(pFileName.getBytes("UTF-8"))))+ "?=";
                }else if (-1 != agent.indexOf("Chrome")) {//Chrome
                    filename = new String(pFileName.getBytes(), "ISO8859-1");
                } else {//IE7+
                    filename = java.net.URLEncoder.encode(pFileName, "UTF-8");
                    filename = StringUtils.replace(filename, "+", "%20");//替换空格
                }
            } else {
                filename = pFileName;
            }
            return filename;
    }  

2.调用工具类

import java.io.File;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Zip;
import org.apache.tools.ant.types.FileSet;
public class ZipCompressorByAnt {
    private File zipFile;
    public ZipCompressorByAnt(String pathName) {
        zipFile = new File(pathName);
    }
    public void compress(String srcPathName) {
        File srcdir = new File(srcPathName);
        if (!srcdir.exists())
            throw new RuntimeException(srcPathName + "不存在！");
        Project prj = new Project();
        Zip zip = new Zip();
        zip.setProject(prj);
        zip.setDestFile(zipFile);
        FileSet fileSet = new FileSet();
        fileSet.setProject(prj);
        fileSet.setDir(srcdir);
        //fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夹 eg:zip.setIncludes("*.java");
        //fileSet.setExcludes(...); 排除哪些文件或文件夹
        zip.addFileset(fileSet);
        zip.execute();
    }
}

生成zip文件并导出

总结一下

关于Java下载zip文件并导出的方法，浏览器导出。

String downloadName = "下载文件名称.zip";
        downloadName = BrowserCharCodeUtils.browserCharCodeFun(request, downloadName);//下载文件名乱码问题解决
        
        //将文件进行打包下载
        try {
            OutputStream out = response.getOutputStream();
            byte[] data = createZip("/fileStorage/download");//服务器存储地址
            response.reset();
            response.setHeader("Content-Disposition","attachment;fileName="+downloadName);
            response.addHeader("Content-Length", ""+data.length);
            response.setContentType("application/octet-stream;charset=UTF-8");
            IOUtils.write(data, out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

获取下载zip文件流

public byte[] createZip(String srcSource) throws Exception{
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outputStream);
        //将目标文件打包成zip导出
        File file = new File(srcSource); 
        a(zip,file,"");
        IOUtils.closeQuietly(zip);
        return outputStream.toByteArray();
    }

public void a(ZipOutputStream zip, File file, String dir) throws Exception {
            //如果当前的是文件夹，则进行进一步处理
            if (file.isDirectory()) {
                //得到文件列表信息
                File[] files = file.listFiles();
                //将文件夹添加到下一级打包目录
                zip.putNextEntry(new ZipEntry(dir + "/"));
                dir = dir.length() == 0 ? "" : dir + "/";
                //循环将文件夹中的文件打包
                for (int i = 0; i < files.length; i++) {
                    a(zip, files[i], dir + files[i].getName());         //递归处理
                }
            } else {   //当前的是文件，打包处理
                //文件输入流
               BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
               ZipEntry entry = new ZipEntry(dir);
               zip.putNextEntry(entry);
               zip.write(FileUtils.readFileToByteArray(file));
               IOUtils.closeQuietly(bis);
               zip.flush();
               zip.closeEntry();
            }
    }

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。