Return xml file from spring MVC controller
I've tried a lot to return a file from a controller function.
This is my function:
@RequestMapping(value = "/files", method = RequestMethod.GET)
@ResponseBody public FileSystemResource getFile() {
return new FileSystemResource(new File("try.txt"));
}
I got this error message:
Failed to write JSON:
Separator not found for class java.io.FileDescriptor and no properties found to create BeanSerializer
(disable SerializationFeature.FAIL_ON_EMPTY_BEANS to avoid exception)
(via link chain:
org.springframework.core.io.FileSystemResource [\ " OutputStream \ "] â java.io.FileOutputStream [\" FD \ "]);
Nested Exception - com.fasterxml.jackson.databind.JsonMappingException: Serializer not found for class java.io.FileDescriptor and no properties found to create BeanSerializer
(disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
(via link chain: org. core.io.FileSystemResource [\ "outputStream \"] â java.io.FileOutputStream [\ "fd \"])
Does anyone have any idea how to solve it?
And how do I send the client (JavaScript, jQuery)?
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EDIT 2: First of all - see edit 1 below - this is the correct way to do it. However, if you cannot get your serializer to work, you can use this solution where you read the XML file into a string and forces the user to save it:
@RequestMapping(value = "/files", method = RequestMethod.GET)
public void saveTxtFile(HttpServletResponse response) throws IOException {
String yourXmlFileInAString;
response.setContentType("application/xml");
response.setHeader("Content-Disposition", "attachment;filename=thisIsTheFileName.xml");
BufferedReader br = new BufferedReader(new FileReader(new File(YourFile.xml)));
String line;
StringBuilder sb = new StringBuilder();
while((line=br.readLine())!= null){
sb.append(line);
}
yourXmlFileInAString = sb.toString();
ServletOutputStream outStream = response.getOutputStream();
outStream.println(yourXmlFileInAString);
outStream.flush();
outStream.close();
}
This should do the job. Remember, however, that the browser caches the content of the URLs - so it would be a good idea to use a unique URL for each file.
EDIT:
After further exploring, you should simply add the following piece of code to your Action for it to work:
response.setContentType("text/plain");
(or for XML)
response.setContentType("application/xml");
So your complete solution should be:
@RequestMapping(value = "/files", method = RequestMethod.GET)
@ResponseBody public FileSystemResource getFile(HttpServletResponse response) {
response.setContentType("application/xml");
return new FileSystemResource(new File("try.xml")); //Or path to your file
}
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