File Download-the Chinese struts2 file is displayed as a space.

File Download-the Chinese struts2 file is displayed as a space.

 

Recently, file downloading is used in the company's projects. Based on the underlying layer, the file downloading mode of struts2 is determined. Most of the garbled characters solve the problem. When a Chinese file is downloaded, Chinese characters are displayed as spaces. After nearly three hours of searching various documents and meditation, I finally found the problem. I have not published any articles about this phenomenon on the Internet, so I will write it out and share it with you.

 

In the struts2 configuration file:

 

<! -- Data File Download -->

<Actionname = "downloadtemplfile" class = "filedownloadaction">

<Result name = "success" type = "stream">

<Paramname = "contenttype"> text/plain </param>

<Paramname = "contenttype"> application/octet-stream; charset = ISO8859-1 </param>

<Paramname = "contentdisposition"> attachment; filename = "$ {downloadfilename}" </param>

<Paramname = "inputname"> inputstream </param>

<Paramname = "buffersize"> 1024 </param>

</Result>

</Action>

 

Java usage:

 

Publicstring getdownloadfilename (){

String filename1 = servletactioncontext. getrequest (). getparameter ("FILENAME ");

Try {

Filename1 = new string (filename1.getbytes ("ISO8859-1"), "UTF-8 ");

} Catch (unsupportedencodingexception E1 ){

E1.printstacktrace ();

}

String downfilename = filename1;

Try {

Downfilename = newstring (downfilename. getbytes (), "ISO8859-1 ");

} Catch (exception e ){

E. printstacktrace ();

}

System. Out. println ("downfilename =======================>" + downfilename );

Return downfilename;

}

Publicinputstream getinputstream () throws exception {

String filename1 = servletactioncontext. getrequest (). getparameter ("FILENAME ");

Stringname = new string (filename1.getbytes ("ISO8859-1"), "UTF-8 ");

System. Out. println ("name ============>" + name );

Inputstreamin = servletactioncontext. getservletcontext (). getresourceasstream ("/custmonitorfile/" + name );

System. Out. println (in );

Returnin;

}

@ Override

Publicstring execute () throws exception {

Return success;

}

 

Note:

Why is the Java source code transferred twice?

Answer:

// Transcoding is required for fields obtained from JSP get or post for the first time.

String filename1 = servletactioncontext. getrequest (). getparameter ("FILENAME ");

Filename1 = newstring (filename1.getbytes ("ISO8859-1"), "UTF-8 ");

 

// The second time you set the Chinese file name to be sent to the client in ISO8859-1 format.

String downfilename = filename1;

Downfilename = newstring (downfilename. getbytes (), "ISO8859-1 ");

 

 

Note: Make sure you understand the purpose, origin, and end of each transcoding task.

If you have good suggestions, leave a message or send it to the author's email address: [email protected]

File Download-the Chinese struts2 file is displayed as a space.