How does one specify a temp directory for file uploads in Spring Boot?

Question

I\'m using Spring Boot and need to let users upload files for processing. Right now, the file uploads to /home/username/git/myproject which is not great.

How do I make S

Answer 1

Since you are using Spring Boot it's easier to use the MultipartProperties in your application.properties file.

From documentation properties example:

# MULTIPART (MultipartProperties)
multipart.enabled=true
multipart.file-size-threshold=0 # Threshold after which files will be written to disk.
multipart.location= # Intermediate location of uploaded files.
multipart.max-file-size=1Mb # Max file size.
multipart.max-request-size=10Mb # Max request size.

Also you could read a detailed description from the MultipartProperties.

In order to configure to your system tmpdir, you could set:

multipart.location=${java.io.tmpdir}

Answer 2

If somebody is still looking for programmatic configuration:

@Configuration
public class ServletConfig {

  @Bean
  public ServletRegistrationBean dispatcherRegistration(DispatcherServlet dispatcherServlet) {
    final ServletRegistrationBean registration = new ServletRegistrationBean(dispatcherServlet);
    final String location = System.getProperty("java.io.tmpdir");
    final long maxFileSize = 128*1024;
    final long maxRequestSize = 128*1024;
    final MultipartConfigElement multipartConfig  = new MultipartConfigElement(location, maxFileSize, maxRequestSize, 0);
    registration.setMultipartConfig(multipartConfig);
    return registration;
  }

}

Answer 3

in springboot 1.4.1.RELEASE

spring.http.multipart.max-file-size=10MB
spring.http.multipart.max-request-size=10MB
spring.http.multipart.enabled=true
spring.http.multipart.location= ..

will be ok.

Answer 4

On windows versus linux the temp dir could have a trailing slash. Multipart held tmp files that caused new file names. creating my own tmp dir solved the issue.

    String tempDir = System.getProperty("java.io.tmpdir");
    if(  !tempDir.endsWith("/") && !tempDir.endsWith( "\\") ) {
        tempDir = tempDir+"/";