使用apache commons传输后文件被破坏

Question

我已经完成了部分成功的文件上传。扩展名为-.html，.jpeg，.pdf等的文件工作正常。当涉及.zip，.rpm，.tar.gz它不起作用。文件正在转移到所需的路径，但文件已损坏。

<tr>  
 <td>FileName</td>  
 <td><input type="text" name="filename" size="30"/></td>  
</tr> 
<tr>  
 <td>Select main category</td>  
 <td>  
  <select name="main">  
   <option >--Select--</option>  
   <option>aerospace</option>  
   <option>automotive</option>  
   <option>energy</option>  
   <option>icengines</option>  
   <option>wind</option>  
   <option>turbo</option>  
   <option>it</option>
   <option>training</option>  
  </select>  
 </td>  
</tr>  
<tr>  
    <td>Select sub category</td>
 <td>  
  <select name="sub">  
   <option >--Select--</option>  
   <option>internal</option>  
   <option>demo</option>  
   <option>best practice</option>  
   <option>marketing</option>  
   <option>papers & public</option>  
   <option>validation</option>  
   <option>training</option>  
  </select>  
 </td>  
</tr>  


<tr>  
 <td>Upload File</td>  
 <td><input type="file" name="file1"/></td>  
</tr> 

它将获取文件名以及下拉值和type =“file”，文件被转移到所需的路径，但文件已损坏上述格式（我已经检查过这些格式）。我需要所有要存储的文件不会被破坏。

我的servlet：

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
private String filename="";     
private String main1="";  
private String location;  
private String sub;
private File uploadFile;  
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {  
try {  
PrintWriter out = response.getWriter();  

DiskFileItemFactory factory = new DiskFileItemFactory();  
ServletFileUpload fileUpload = new ServletFileUpload(factory);         
List items = fileUpload.parseRequest(request);  
Iterator ir = items.iterator();  
while(ir.hasNext()){  
FileItem item = (FileItem)ir.next();  


if(item.isFormField())
{ 

 String name = item.getFieldName();  

 if(name != null)  
 {  
 if(name.equals("userName"))
 {  
  filename = item.getString();  
 }

 else if(name.equals("main"))
 {  
  main1 = item.getString();  
 }
 else if(name.equals("sub"))
 {
     sub=item.getString();
 }
 }  
}else{  

 location = File.separator+"home"+File.separator+"adapco"+File.separator+"Desktop"+ File.separator +"output"+ File.separator +main1+File.separator+sub+File.separator+filename;
 uploadFile = new File(location);        
 long size = item.getSize();  
 if(size <= 1024*1024*1024)
 {  
  item.write(uploadFile);  
  out.println("Your File is uploaded successfully ");  
 }else{  
  out.println("Your File is not uploaded.File size should be less than 1gb");  
 }  
}  
}  
} catch (Exception e) {  
}  
}   

}