zip文件上传，读取

 

如果zip文件上传到服务器解压一般需要保存到磁盘，然后解压。使用以后删除解压文件。以下演示的是无需解压到磁盘，直接读取zip包内文件的内容。zip文件里面含有一个ejb.txt文本文件。文件上传使用的是commons-fileupload包

jsp文件
<form action="upfile.do" enctype="multipart/form-data">
<input type="file" name="ufile" id="ufile">
<input name="sunbit" type="submit" value="上传">
</form>

java文件，读取的是zip文件，zip文件包含一个ejb.txt文件。页面打印ejb.txt文件内容

@Override
protected ActionForward unspecified(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
request.setCharacterEncoding("gbk");
response.setCharacterEncoding("gbk");//设置字符集
DiskFileUpload upload=new DiskFileUpload();
List list=upload.parseRequest(request);
if (DiskFileUpload.isMultipartContent(request)) {
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
FileItem file = (FileItem) iterator.next();
if (!file.isFormField()) {
InputStream inputStream = file.getInputStream();
//inputStream可以读取任何文件,干什么都可以了
//以下代码为读取zip文件中的txt文档在页面显示
showZip(response,inputStream);
}
}
}
return null;
}

private void showZip(HttpServletResponse response, InputStream inputStream)throws IOException {
ZipInputStream zis=new ZipInputStream(inputStream);
ZipEntry zipEntry=zis.getNextEntry();
while (zipEntry!=null) {
if ("ejb.txt".equals(zipEntry.getName())) {//也可以建个map先把文件读进去，以后用的时候再取
InputStreamReader isr = new InputStreamReader(zis);
BufferedReader br = new BufferedReader(isr);
String str = null;
while ((str = br.readLine()) != null) {
response.getWriter().println(str);
}
}
zipEntry=null;
zipEntry=zis.getNextEntry();
}
}