Java如何把文件夹打成压缩包并导出

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。