Java Spring MVC upload download file configuration and controller method detailed _java

Download:

1. Configure in Spring-mvc (for download of files below 100M)

<bean class= "Org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" > 
< Property name= "Messageconverters" > 
<list> 
<!--Configure download return type-->
<bean class= " Org.springframework.http.converter.ByteArrayHttpMessageConverter "/> 
<bean class=" Org.springframework.http.converter.StringHttpMessageConverter "> 
<!--configuration encoding mode-->
<property Name= "Supportedmediatypes" value= "Application/json; Charset=utf-8 "/> 
</bean> 
</list> 
</property> 
</bean>

Download file code

@RequestMapping ("/FILE/{NAME.RP}") Public responseentity<byte[]> FileDownload (@PathVariable ("NAME.RP") String name, HttpServletRequest request,httpservletresponse response) {//@PathVariable String name,//@RequestParam ("N
Ame ") String name,//System.out.println (" <name> "+name); System.out.println (">>>>>>>>>>>>>>>>>>>>>>
>>>>>>>> ");
responseentity<byte[]> re = null; try {/** * css,js,json,gif,png,bmp,jpg,ico,doc,docx,xls,xlsx,txt,swf,pdf * **///download prevent static load interference feelutile f=new Feelutile ()
;
Name=f.getfileformat (name); 
String pathstring= "c:\\tempdirectory\\" +name;
File File=new file (pathstring);
Httpheaders headers=new httpheaders (); String Filename=urlencoder.encode (Name, "UTF-8");//To resolve the Chinese name garbled problem string Filename=new string (name.getbytes ("Utf-8")
, "Utf-8");
Byte[] By=fileutils.readfiletobytearray (file);
Headers.setcontenttype (Mediatype.application_octet_stream); Urlencoder.encode(FileName, "UTF-8") headers.setcontentdispositionformdata ("attachment", filename);
Headers.setcontentlength (by.length);
Re=new responseentity<byte[]> (by, headers, httpstatus.created); catch (Exception e) {e.printstacktrace (); try {request.getrequestdispatcher ("/error/404.jsp"). Forward (Request,
Response); The catch (servletexception E1) {//TODO auto-generated catch block E1.printstacktrace ();} catch (IOException E1) {//TOD
O auto-generated Catch block E1.printstacktrace ();
} return re; }

Upload file:

1 configured in SPRING-MVC

<!--4. File upload configuration files upload-->
<bean id= "Multipartresolver" class= "
Org.springframework.web.multipart.commons.CommonsMultipartResolver ">
<property name=" Defaultencoding " >
<value>UTF-8</value>
</property>
<property name= "Maxuploadsize" >
<value>1048576000</value>
</property>
<property name= "Maxinmemorysize" >
<value>40960</value>
</property>
</bean>

The code in controller is as follows

 @RequestMapping (value= "/upload", method = Requestmethod.post) @ResponseBody public  JSON upload (Doc Doc, @RequestParam ("UploadFile") commonsmultipartfile file) {JSON j = new Json (); try {String Realpath = 
This.servletContext.getRealPath ("/upload"); 
String uploadfilefilename = File.getoriginalfilename (); 
String uploadfilefilenamewithoutspace = Uploadfilefilename.replaceall ("", "");
String FileType = uploadfilefilenamewithoutspace.substring (Uploadfilefilenamewithoutspace.lastindexof ("."));
File TargetFile = new file (Realpath+file.separator, uploadfilefilenamewithoutspace); 
if (targetfile.exists ()) {Targetfile.delete ();} file.getfileitem (). write (TargetFile);
Docservice.upload (Doc,uploadfilefilenamewithoutspace);
J.setsuccess (TRUE);
J.setmsg ("Upload manual successfully");
}catch (Exception e) {logger.error (Exceptionutil.getexceptionmessage (e)); J.setmsg (Upload manual unsuccessfully);
Return J; }

The above is a small series to introduce Java Spring MVC upload download file configuration and controller method, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!