# # #struts2 complete file Download:1. First clear the basic knowledge: InputStream and FileInputStream, etc. are for memory, then the file input stream must be to the memory input stream, which is useful for file downloading. Essential Understanding Download File process: The first step: is to download the file to put or call the link to the input stream: The file to the memory of the new FileInputStream ("D:\\test.txt") The second step: the input flow into the output stream, that is, data from the memory dry to the file, This completes the file download function. Ye's IP grab download Excel principle is to use this kind of output flow way: InputStream in=new FileInputStream (temp); OutStream (in); Temp.delete (); The third step: cooperate with the following control to the browser: GetResponse (). setContentType ("application/vnd.ms-excel; CHARSET=GBK "); String filename=buildtitle () + ". xls"; GetResponse (). SetHeader ("Content-disposition", "attachment; filename=" +new String (Filename.getbytes ("GB2312"), " Iso-8859-1 "));
This is the whole principle of file downloading.
2.struts2 Download files: The framework is really simple--> still use XML configuration, instead of cumbersome hard coding. First step: Add one to the action:
Public InputStream getInputStream () throws Exception {
return new FileInputStream ("D:\\test.txt");
Step Two: Add configuration in Struts.xml: <action name= "Topexporttxt" class= "Cn.cstnet.trafficView.action.flow.CatchIPTopAction" > <result name= "Success" type= "Stream" > <param name= "ContentType" >text/plai n</param> <param name= "InputName" >inputStream</param> <param name= "contentdisposition" >attachment;filename= "Struts2down.txt" </param> <param name= "buffersize" >4096</param> </result> </action>
The above two steps are completely buttoned up, very sharp, when the specific changes to meet business needs can be.
