Spring rest MultiPart file upload with Java configuration without Spring boot
Solution 1
The correct way to configure Spring project to handle file upload with java configuration is this: If you want to configure it with Commons FileUpload library you have only to include this bean in your Configuration class and add the jar in your classpath
@Bean
public CommonsMultipartResolver multipartResolver(){
CommonsMultipartResolver resolver = new CommonsMultipartResolver();
resolver.setMaxUploadSize(5242880); // set the size limit
return resolver;
}
if you want to configure the project with Servlet 3.0, as @AlieneilA said you have to set the MultipartConfig
element in dispatcher servlet:
dispatcher.setMultipartConfig(new MultipartConfigElement("C:/tmp", 1024*1024*5, 1024*1024*5*5, 1024*1024));
and include this bean in configuration class (AppConfig in my case):
@Bean
public StandardServletMultipartResolver multipartResolver() {
return new StandardServletMultipartResolver();
}
I was wrong in the way i inserted the file into the LinkedMultiValueMap
. I had to use a FileSystemResource
:
File file = new File("C:\\document.doc");
RestTemplate rest = new RestTemplate();
LinkedMultiValueMap<String, Object> map = new LinkedMultiValueMap<String, Object>();
map.add("param1", param1);
map.add("param2", param2);
map.add("file", new FileSystemResource(file));
Long response = rest.postForObject(url, map, Long.class);
or a MockMultipartFile
as suggested by this answer: https://stackoverflow.com/a/38270420/6503002
In this case include spring mock as dependency:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-mock</artifactId>
<version>2.0.8</version>
</dependency>
Solution 2
I think you might want to try something like this:
public class AppInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.register(AppConfig.class);
context.setServletContext(servletContext);
servletContext.addListener(new ContextLoaderListener(context));
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcherServlet", new DispatcherServlet(context));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
dispatcher.setMultipartConfig(getMultipartConfigElement());
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
characterEncodingFilter.setForceEncoding(true);
EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD);
FilterRegistration.Dynamic characterEncoding = servletContext.addFilter("CharacterEncodingFilter", characterEncodingFilter);
characterEncoding.addMappingForUrlPatterns(dispatcherTypes, true, "/*");
}
private MultipartConfigElement getMultipartConfigElement(){
MultipartConfigElement multipartConfigElement = new MultipartConfigElement("C:/tmp", 1024*1024*5, 1024*1024*5*5, 1024*1024);
return multipartConfigElement;
}
}
Comments
-
amicoderozer almost 2 years
I am trying to implement a rest web service that uses
MultipartFile
to upload a file using Spring, with java configuration. I do not use Spring Boot and I havecommons-fileupload
library in my classpath.I read Spring documentation that says:
you need to mark the DispatcherServlet with a "multipart-config" section in web.xml, or with a javax.servlet.MultipartConfigElement in programmatic Servlet registration, or in case of a custom Servlet class possibly with a javax.servlet.annotation.MultipartConfig annotation on your Servlet class ... Once Servlet 3.0 multipart parsing has been enabled in one of the above mentioned ways you can add the StandardServletMultipartResolver to your Spring configuration
Hence I added this bean to my
AppConfig
class:@Bean public StandardServletMultipartResolver multipartResolver() { return new StandardServletMultipartResolver(); }
and annotated the class with
MultipartConfig
:@EnableWebMvc @MultipartConfig(maxFileSize = 5120) public class AppConfig extends WebMvcConfigurerAdapter{ ... }
but I get this exception when I call the service:
Caused by: org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is java.lang.UnsupportedOperationException: SRVE8020E: Servlet does not accept multipart request at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:111) at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:85) at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:76) at org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:112) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:207) at [internal classes] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:207) ... 1 more Caused by: java.lang.UnsupportedOperationException: SRVE8020E: Servlet does not accept multipart request at com.ibm.ws.webcontainer.srt.SRTServletRequest.prepareMultipart(SRTServletRequest.java:3657) at [internal classes] at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:92)
If I use
CommonsMultipartResolver
instead ofStandardServletMultipartResolver
I get the same error.This is how I initialize my application:
public class AppInitializer implements WebApplicationInitializer { @Override public void onStartup(ServletContext servletContext) throws ServletException { AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext(); context.register(AppConfig.class); context.setServletContext(servletContext); servletContext.addListener(new ContextLoaderListener(context)); ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcherServlet", new DispatcherServlet(context)); dispatcher.setLoadOnStartup(1); dispatcher.addMapping("/"); CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter(); characterEncodingFilter.setEncoding("UTF-8"); characterEncodingFilter.setForceEncoding(true); EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD); FilterRegistration.Dynamic characterEncoding = servletContext.addFilter("CharacterEncodingFilter", characterEncodingFilter); characterEncoding.addMappingForUrlPatterns(dispatcherTypes, true, "/*"); } }
I also tried add a
MultipartFilter
but with no luck.MultipartFilter multipartFilter = new MultipartFilter(); FilterRegistration.Dynamic multipart = servletContext.addFilter("multipartFilter", multipartFilter); multipart.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST), true, "/*");
Is this necessary? What am I doing wrong? I think I read the whole internet searching for a solution but they all use spring boot with
MultipartConfigElement
andMultipartConfigFactory
. Maybe the problem is the way I consume the service?This is my controller method:
@RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = "multipart/form-data" ) public Long uploadAttachment(@RequestParam("cn") String callerName, @RequestParam("cs") String callerService, @RequestParam("file") MultipartFile file)
and this is how i consume it:
File file = new File("C:\\Users\\cte0289\\Documents\\Email\\document.docx"); RestTemplate rest = new RestTemplate(); LinkedMultiValueMap<String, Object> map = new LinkedMultiValueMap<String, Object>(); map.add("cn", callerName); map.add("cs", callerService); map.add("file", file); Long response = rest.postForObject(url + "/upload", map, Long.class);
Please help I don't know what else to do.
-
amicoderozer over 7 yearsI tried this solution but i still get the same error. Thanks anyway!
-
AlieneilA over 7 yearsthen I suggest you look at how you are uploading the file. I see that you have declared: File file = new File(..) Maybe it would be nice to make a class for a file (a filebucket) and should you not be trying to upload a MultipartFile ?
-
amicoderozer about 7 yearsYou were right, i used the wrong method to upload the file. Thank you for the suggestion. +1
-
AlieneilA about 7 yearsHappy to be of help to you!