文件的打包压缩与下载

来源：互联网发布：linux怎么学知乎编辑：程序博客网时间：2024/04/28 04:45

java代码：action方法

public void zip(List<BbEntity list,String zipName,,String sourceName){

OutputStream o = null;
o = servletActionContext.getResponse().getOutputStream();//将输出流写入到服务器的响应输出流里。
response.setHeader("","attachement;filename='xx.zip'");//对下载的文件重命名
ZipOutputStream out =new ZipOutputStream(o);
//ZipOutputStream out =new ZipOutputStream(new File(zipName));//将输出流写入到指定的zip文件里。
for(int i=0;i<list.size();i++){
BbEntity bb = list.get(i);
out.putNextEntry(new ZipEntry(bb.getDisplayPath()+"/"+bb.getFileName));
FileInputStream in = new FileInputStream(new File(bb.getRealPath()));
int b;
while((b=in.read())!=-1){
out.write(b);
}
in.close();
}
out.close();

}
}

}

调用方式：zip(getBbList(),"d:/xx.zip","d:/xx")

页面调用方式:window.location = '${pagecontext.request.contextPath}/xx/yy!zip.action'

页面展示：弹出一个下载对话框。

将upload文件写到指定的path，文件名为filename

public static void saveFileFromInputStream(File upload,String path,String filename) throws IOException
    {
       InputStream in = null;
       OutputStream out = null;
       try {
           in = new BufferedInputStream(new FileInputStream(upload));
           out = new BufferedOutputStream(new FileOutputStream(path + "/"
                   + filename));
           byte[] buffer = new byte[BUFFER_SIZE];
           int byteread = 0;
           while ((byteread = in.read(buffer)) != -1) {
               out.write(buffer, 0, byteread);
               out.flush();
           }
       } catch (Exception e) {
           e.printStackTrace();
       }finally{
           in.close();
           out.close();
       }
    }

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