Converting MultipartFile to File - spring-boot

Question

I am trying to convert a MultipartFile to File but multipartFile.transferTo(uploadedFile); is throwing an IOException.
To me it looks like the application is looking for the uploadedFile at '/tmp/tomcat.8080.434182389216770471/work/Tomcat/localhost/ROOT/upload_43f33560_23be_4189_843c_d9062cb44ec2_00000000.tmp' instead of src/main/resources/targetFile.tmp
#GetMapping("/reportError")
public String error(Model model) throws MessagingException, IOException {
EmailService emailService = new EmailService();
File uploadedFile = new File("src/main/resources/targetFile.tmp");
multipartFile.transferTo(uploadedFile);
emailService.sendmail(Arrays.asList(uploadedFile, dailyReportFile, shiftReportFile));
model.addAttribute("msg", "Thanks for reporting.\nIt helps us improve the app.");
return "messageView";
}
java.io.IOException: java.io.FileNotFoundException:
/tmp/tomcat.8080.434182389216770471/work/Tomcat/localhost/ROOT/upload_43f33560_23be_4189_843c_d9062cb44ec2_00000000.tmp
(No such file or directory) at
org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:122)
~[tomcat-embed-core-9.0.45.jar:9.0.45] at
org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile.transferTo(StandardMultipartHttpServletRequest.java:256)
~[spring-web-5.3.6.jar:5.3.6] at
gmailgdogra.controller.AppController.error(AppController.java:202)
~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method) ~[na:1.8.0_292] at
java.lang.Thread.run(Thread.java:748) [na:1.8.0_292] Caused by:
java.io.FileNotFoundException:
/tmp/tomcat.8080.434182389216770471/work/Tomcat/localhost/ROOT/upload_43f33560_23be_4189_843c_d9062cb44ec2_00000000.tmp
(No such file or directory) at java.io.FileInputStream.open0(Native
Method) ~[na:1.8.0_292] at
java.io.FileInputStream.open(FileInputStream.java:195) ~[na:1.8.0_292]
at java.io.FileInputStream.(FileInputStream.java:138)
~[na:1.8.0_292] at
org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.write(DiskFileItem.java:404)
~[tomcat-embed-core-9.0.45.jar:9.0.45] at
org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:120)
~[tomcat-embed-core-9.0.45.jar:9.0.45] ... 52 common frames omitted
And my Test pass with similar code
#Test
void convert() throws IOException {
MultipartFile multipartFile = new MockMultipartFile("sourceFile.tmp", "Hello World".getBytes());
File file = new File("src/main/resources/targetFile.tmp");
multipartFile.transferTo(file);
assertThat(FileUtils.readFileToString(new File("src/main/resources/targetFile.tmp"), "UTF-8"))
.isEqualTo("Hello World");
}
Below code works well if I don't send the converted Multipart file.
#GetMapping("/reportError")
public String error(Model model) throws MessagingException, IOException {
EmailService emailService = new EmailService();
emailService.sendmail(Arrays.asList(dailyReportFile, shiftReportFile));
model.addAttribute("msg", "Thanks for reporting.\nIt helps us improve the app.");
return "messageView";
}
#GetMapping("/reportError")
public String error(Model model) throws MessagingException, IOException {
InputStream initialStream = multipartFile.getInputStream();
byte[] buffer = new byte[initialStream.available()];
initialStream.read(buffer);
File targetFile = new File("src/main/resources/targetFile.tmp");
try (OutputStream outStream = new FileOutputStream(targetFile)) {
outStream.write(buffer);
}
EmailService emailService = new EmailService();
emailService.sendmail(Arrays.asList(targetFile, dailyReportFile, shiftReportFile));
model.addAttribute("msg", "Thanks for reporting.\nIt helps us improve the app.");
return "messageView";
}
I have tried above but it fails with message
java.io.FileNotFoundException:
/tmp/tomcat.8080.486619881437185002/work/Tomcat/localhost/ROOT/upload_43ba6a8d_27c9_49de_a73e_4f9026fc852e_00000000.tmp
(No such file or directory) at java.io.FileInputStream.open0(Native
Method) ~[na:1.8.0_292] at
java.io.FileInputStream.open(FileInputStream.java:195) ~[na:1.8.0_292]
at java.io.FileInputStream.(FileInputStream.java:138)
~[na:1.8.0_292] at
org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.getInputStream(DiskFileItem.java:194)
~[tomcat-embed-core-9.0.45.jar:9.0.45] at
org.apache.catalina.core.ApplicationPart.getInputStream(ApplicationPart.java:100)
~[tomcat-embed-core-9.0.45.jar:9.0.45] at
Edit
Similar problem similar stackoverflow question. But none of the provided solution has worked for me.
Tried below code but it also failed
#GetMapping("/reportError")
public String error(Model model) throws MessagingException, IOException {
EmailService emailService = new EmailService();
File uploadedFile = convert(multipartFile);
System.out.println("transferTo completed");
emailService.sendmail(Arrays.asList(uploadedFile, dailyReportFile, shiftReportFile));
model.addAttribute("msg", "Thanks for reporting.\nIt helps us improve the app.");
return "messageView";
}
public File convert(MultipartFile file) throws IOException {
File convFile = new File(file.getOriginalFilename());
convFile.createNewFile();
FileOutputStream fos = new FileOutputStream(convFile);
fos.write(file.getBytes());
fos.close();
return convFile;
}
Thanks