Could not find acceptable representation using spring-boot-starter-web

Question

I am trying to use spring-boot-starter-web to create a rest service serving up JSON representations of Java objects  From what I understand this boot-starter-web jar is supposed to handle the conversion to JSON through Jackson automatically but I am instead getting this error         timestamp   1423693929568     status   406     error    Not Acceptable      exception    org springframework web HttpMediaTypeNotAcceptableException      message    Could not find acceptable representation      My Controller is this      RestController  RequestMapping value     media   public class MediaController        RequestMapping value     test   method   RequestMethod POST      public  ResponseBody UploadResult test  RequestParam value  data   final String data          String value    hello  test with data      data               return new UploadResult value               RequestMapping value     test2   method   RequestMethod POST      public int test2             return 42              RequestMapping value     test3   method   RequestMethod POST      public String test3  RequestParam value  data   final String data            String value    hello  test with data      data                 UploadResult upload   new UploadResult value           return upload value              public static class UploadResult           private String value          public UploadResult final String value                        this value   value                      My pom xml has      lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt version gt 1 2 1 RELEASE lt  version gt   lt  dependency gt    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt       lt version gt 1 2 1 RELEASE lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt    mvn dependency tree shows that spring-boot-starter-web does indeed depend on the jackson2 4 databind and thus should be on the classpath      INFO   - org springframework boot spring-boot-starter-web jar 1 2 1 RELEASE compile  INFO      - org springframework boot spring-boot-starter jar 1 2 1 RELEASE compile  INFO         - org springframework boot spring-boot jar 1 2 1 RELEASE compile  INFO         - org springframework boot spring-boot-autoconfigure jar 1 2 1 RELEASE compile  INFO         - org springframework boot spring-boot-starter-logging jar 1 2 1 RELEASE compile  INFO            - org slf4j jul-to-slf4j jar 1 7 8 compile  INFO            - org slf4j log4j-over-slf4j jar 1 7 8 compile  INFO         - org yaml snakeyaml jar 1 14 runtime  INFO      - com fasterxml jackson core jackson-databind jar 2 4 4 compile  INFO         - com fasterxml jackson core jackson-annotations jar 2 4 0 compile  INFO         - com fasterxml jackson core jackson-core jar 2 4 4 compile  INFO      - org hibernate hibernate-validator jar 5 1 3 Final compile  INFO         - javax validation validation-api jar 1 1 0 Final compile  INFO         - org jboss logging jboss-logging jar 3 1 3 GA compile  INFO         - com fasterxml classmate jar 1 0 0 compile  INFO      - org springframework spring-web jar 4 1 4 RELEASE compile  INFO         - org springframework spring-aop jar 4 1 4 RELEASE compile  INFO            - aopalliance aopalliance jar 1 0 compile  INFO         - org springframework spring-beans jar 4 1 4 RELEASE compile  INFO         - org springframework spring-context jar 4 1 4 RELEASE compile  INFO      - org springframework spring-webmvc jar 4 1 4 RELEASE compile  INFO         - org springframework spring-expression jar 4 1 4 RELEASE compile       yet calling the test service gives the error mentioned above  test2 and test3 work fine proving that it must just be the attempted conversion to JSON that is failing  Am I missing some configuration problem or annotations  From all the examples I can find  annotating the class for basic Jackson JSON conversion is no longer necessary   Any help greatly appreciated

User · Answer

For me  the problem was trying to pass a filename in a url  with a dot  For example  quot http   localhost 8080 something asdf jpg quot    causes error because of   jpg   It could be solved by not passing the  jpg extension  or sending it all in a request body

User · Answer

I had a similar error using spring jhipster RESTful service  via Postman   The endpoint was something like    RequestMapping value     index-entries  id            method   RequestMethod GET          produces   MediaType APPLICATION JSON VALUE   Timed public ResponseEntity lt IndexEntry gt  getIndexEntry  PathVariable Long id      I was attempting to call the restful endpoint via Postman with header Accept  text plain but I needed to use Accept  application json

User · Answer

Had similar issue when one of my controllers was intercepting all requests with empty  GetMapping

User · Answer

I had this issue when accessing actuator  Putting following configuration class solved the issue    Configuration  EnableWebMvc public class MediaConverterConfiguration implements WebMvcConfigurer        Bean     public MappingJackson2HttpMessageConverter jacksonConverter             MappingJackson2HttpMessageConverter mc                   new MappingJackson2HttpMessageConverter            List lt MediaType gt  supportedMediaTypes                   new ArrayList lt  gt  mc getSupportedMediaTypes             supportedMediaTypes                  add MediaType valueOf MediaType APPLICATION JSON VALUE            supportedMediaTypes add              MediaType valueOf  application vnd spring-boot actuator v2 json             mc setSupportedMediaTypes supportedMediaTypes           return mc              Override     public void configureMessageConverters List lt HttpMessageConverter lt   gt  gt  converters            converters add jacksonConverter

User · Answer

In my case I happened to be using lombok and apparently there are conflicts with the get and set

User · Answer

accepted answer is not right with Spring 5    try changing your URL of your web service to  json   that is the right fix   great details here http   stick2code blogspot com 2014 03 solved-orgspringframeworkwebhttpmediaty html

User · Answer

You have no public getters for your UpdateResult  for example    public static class UploadResult       private String value      public UploadResult final String value                this value   value             public String getValue            return this value            I believe by default auto discovery is on and will try to discover your getters  You can disable it with  JsonAutoDetect getterVisibility Visibility NONE   and in your example will result in

User · Answer

My return object didn t have  XmlRootElement annotation on the class  Adding the annotation solved my issue    XmlRootElement name    ReturnObjectClass   public class ReturnObjectClass         XmlElement name    Status   required   true      protected StatusType status

User · Answer

Add below dependency to your pom xml    lt dependency gt       lt groupId gt com fasterxml jackson dataformat lt  groupId gt       lt artifactId gt jackson-dataformat-xml lt  artifactId gt       lt version gt 2 10 2 lt  version gt   lt  dependency gt

User · Answer

If using  FeignClient  add e g   produces    application json    to the  RequestMapping annotation

User · Answer

I too was facing a similar issue  In my case the request path was accepting mail id as path variable  so the uri looked like    some api test test com  And based on path  Spring determined the uri is to fetch some file with   com  extension and was trying to use different media type for response then intended one  After making path variable into request param it worked for me

User · Answer

If you are using Lombok  make sure it have annotations like  Data or  Getter  Setter in your Response Model class

User · Answer

In my case I was sending in correct object in ResponseEntity lt  gt     Correct    PostMapping value    quot  get-customer-details quot   produces     MediaType APPLICATION JSON VALUE    public ResponseEntity lt   gt  getCustomerDetails  RequestBody String requestMessage  throws JSONException       JSONObject jsonObject   new JSONObject        jsonObject put  quot customerId quot    quot 123 quot        jsonObject put  quot mobileNumber quot    quot XXX-XXX-XXXX quot        return new ResponseEntity lt  gt  jsonObject toString    HttpStatus OK      Incorrect   return new ResponseEntity lt  gt  jsonObject  HttpStatus OK    Because  jsonObject s toString   method  quot Encodes the jsonObject as a compact JSON string quot   Therefore  Spring returns json string directly without any further serialization  When we send jsonObject instead  Spring tries to serialize it based on produces method used in RequestMapping and fails due to it  quot Could not find acceptable representation quot

User · Answer

I had to explicitly call out the dependency for my json library in my POM   Once I added the below dependency  it all worked    lt dependency gt       lt groupId gt com google code gson lt  groupId gt       lt artifactId gt gson lt  artifactId gt   lt  dependency gt

User · Answer

I was running into the same issue  and what I was missing in my setup was including this in my maven  pom xml  file   lt dependency gt        lt groupId gt org codehaus jackson lt  groupId gt        lt artifactId gt jackson-mapper-asl lt  artifactId gt        lt version gt 1 9 9 lt  version gt   lt  dependency gt

User · Answer

I had the same exception  The problem was  that I used the annotation   RepositoryRestController  instead of   RestController

User · Answer

I had the same exception but the cause was different and I couldn t find any info on that so I will post it here  It was just a simple to overlook mistake   Bad    RestController value     api connection     Good    RestController  RequestMapping value     api connection

User · Answer

I got the exact same problem  After viewing this reference  http   zetcode com springboot requestparam   My problem solved by changing   method   RequestMethod GET  produces    application json charset UTF-8    to  method   RequestMethod GET  produces   MediaType TEXT PLAIN VALUE  and don t forget to add the library   import org springframework http MediaType    it works on both postman or regular browser

[java] "Could not find acceptable representation" using spring-boot-starter-web

Examples related to java

Examples related to json

Examples related to spring

Examples related to maven

Examples related to spring-mvc