JQuery Spring MVC RequestBody and JSON - making it work together

Question

I would like to have a bidirectional JSON to Java serialization  I m using successfully the Java to JSON to JQuery path      ResponseBody  e g     RequestMapping value    fooBar  id     method RequestMethod GET       public  ResponseBody FooBar getFooBar               PathVariable String id              HttpServletResponse response   ModelMap model            response setContentType  application json            and In JQuery I use     getJSON  fooBar 1   function data          do something       this works well  e g  annotations work already  thanks to all the answerers   However  how do I do the reverse path  have JSON be serialized to a Java Object back using RequestBody    no matter what I try  I can t get something like this to work    RequestMapping value    fooBar save    method RequestMethod POST  public String saveFooBar  RequestBody FooBar fooBar          HttpServletResponse response   ModelMap model         This method is never called   it does when I remove the RequestBody         I have Jackson configured correctly  it serializes on the way out  and I have MVC set as annotations driven of course  How do I make it work  is it possible at all  or is Spring   JSON   JQuery is oneway  out       Update   I changed this Jackson setting   lt bean id  jsonHttpMessageConverter      class  org springframework http converter json MappingJacksonHttpMessageConverter    gt    lt  -- Bind the return value of the Rest service to the ResponseBody  -- gt   lt bean     class  org springframework web servlet mvc annotation AnnotationMethodHandlerAdapter  gt       lt property name  messageConverters  gt           lt util list id  beanList  gt               lt ref bean  jsonHttpMessageConverter    gt   lt  --             lt ref bean  xmlMessageConverter    gt  -- gt                         lt  util list gt       lt  property gt   lt  bean gt    To the  almost similiar one  suggested    lt bean id  jacksonMessageConverter      class  org springframework http converter json MappingJacksonHttpMessageConverter  gt  lt  bean gt       lt bean         class  org springframework web servlet mvc annotation AnnotationMethodHandlerAdapter  gt           lt property name  messageConverters  gt               lt list gt                   lt ref bean  jacksonMessageConverter    gt               lt  list gt           lt  property gt       lt  bean gt     And it seems to work  I don t know what exactly did the trick  but it works

User · Answer

In Addition you also need to be sure that you have

 <context:annotation-config/>

in your SPring configuration xml.

I also would recommend you to read this blog post. It helped me alot. Spring blog - Ajax Simplifications in Spring 3.0

Update:

just checked my working code where I have @RequestBody working correctly. I also have this bean in my config:

<bean id="jacksonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
 <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
  <list>
    <ref bean="jacksonMessageConverter"/>
  </list>
</property>
</bean>

May be it would be nice to see what Log4j is saying. it usually gives more information and from my experience the @RequestBody will fail if your request's content type is not Application/JSON. You can run Fiddler 2 to test it, or even Mozilla Live HTTP headers plugin can help.

User · Answer

In addition to the answers here     if you are using jquery on the client side  this worked for me   Java    RequestMapping value     ajax search sync    public String sync  RequestBody Foo json      Jquery  you need to include Douglas Crockford s json2 js to have the JSON stringify function      ajax       type   post       url   sync     your valid url     contentType   application json     this is required for spring 3 - ajax to work  at least for me      data  JSON stringify jsonobject     json object or array of json objects     success  function result              do nothing            error  function            alert  failure

User · Answer

I m pretty sure you only have to register MappingJacksonHttpMessageConverter    the easiest way to do that is through  lt mvc annotation-driven   gt  in XML or  EnableWebMvc in Java   See    this forum post and 7 6 5 Configuring Formatting in Spring MVC     Here s a working example   Maven POM   lt project xmlns  http   maven apache org POM 4 0 0  xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xsi schemaLocation  http   maven apache org POM 4 0 0 http   maven apache org maven-v4 0 0 xsd  gt       lt modelVersion gt 4 0 0 lt  modelVersion gt  lt groupId gt test lt  groupId gt  lt artifactId gt json lt  artifactId gt  lt packaging gt war lt  packaging gt       lt version gt 0 0 1-SNAPSHOT lt  version gt  lt name gt json test lt  name gt       lt dependencies gt           lt dependency gt  lt  -- spring mvc -- gt               lt groupId gt org springframework lt  groupId gt  lt artifactId gt spring-webmvc lt  artifactId gt  lt version gt 3 0 5 RELEASE lt  version gt           lt  dependency gt           lt dependency gt  lt  -- jackson -- gt               lt groupId gt org codehaus jackson lt  groupId gt  lt artifactId gt jackson-mapper-asl lt  artifactId gt  lt version gt 1 4 2 lt  version gt           lt  dependency gt       lt  dependencies gt       lt build gt  lt plugins gt               lt  -- javac -- gt  lt plugin gt  lt groupId gt org apache maven plugins lt  groupId gt  lt artifactId gt maven-compiler-plugin lt  artifactId gt               lt version gt 2 3 2 lt  version gt  lt configuration gt  lt source gt 1 6 lt  source gt  lt target gt 1 6 lt  target gt  lt  configuration gt  lt  plugin gt               lt  -- jetty -- gt  lt plugin gt  lt groupId gt org mortbay jetty lt  groupId gt  lt artifactId gt jetty-maven-plugin lt  artifactId gt               lt version gt 7 4 0 v20110414 lt  version gt  lt  plugin gt       lt  plugins gt  lt  build gt   lt  project gt      in folder src main webapp WEB-INF  web xml   lt web-app xmlns  http   java sun com xml ns j2ee  xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xsi schemaLocation  http   java sun com xml ns j2ee http   java sun com xml ns j2ee web-app 2 4 xsd      version  2 4  gt       lt servlet gt  lt servlet-name gt json lt  servlet-name gt           lt servlet-class gt org springframework web servlet DispatcherServlet lt  servlet-class gt           lt load-on-startup gt 1 lt  load-on-startup gt       lt  servlet gt       lt servlet-mapping gt           lt servlet-name gt json lt  servlet-name gt           lt url-pattern gt    lt  url-pattern gt       lt  servlet-mapping gt   lt  web-app gt    json-servlet xml   lt beans xmlns  http   www springframework org schema beans      xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xsi schemaLocation  http   www springframework org schema beans                         http   www springframework org schema beans spring-beans xsd  gt        lt import resource  classpath mvc-context xml    gt    lt  beans gt      in folder src main resources   mvc-context xml   lt beans xmlns  http   www springframework org schema beans      xmlns mvc  http   www springframework org schema mvc  xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xmlns context  http   www springframework org schema context      xsi schemaLocation  http   www springframework org schema mvc http   www springframework org schema mvc spring-mvc-3 0 xsd         http   www springframework org schema beans http   www springframework org schema beans spring-beans-3 0 xsd         http   www springframework org schema context http   www springframework org schema context spring-context-3 0 xsd  gt        lt mvc annotation-driven   gt       lt context component-scan base-package  test json    gt   lt  beans gt      In folder src main java test json  TestController java   Controller  RequestMapping   test   public class TestController         RequestMapping method   RequestMethod POST  value    math        ResponseBody     public Result math  RequestBody final Request request            final Result result   new Result            result setAddition request getLeft     request getRight             result setSubtraction request getLeft   - request getRight             result setMultiplication request getLeft     request getRight             return result             Request java  public class Request implements Serializable       private static final long serialVersionUID   1513207428686438208L      private int left      private int right      public int getLeft    return left       public void setLeft int left   this left   left       public int getRight    return right       public void setRight int right   this right   right       Result java  public class Result implements Serializable       private static final long serialVersionUID   -5054749880960511861L      private int addition      private int subtraction      private int multiplication       public int getAddition     return addition        public void setAddition int addition    this addition   addition        public int getSubtraction     return subtraction        public void setSubtraction int subtraction    this subtraction   subtraction        public int getMultiplication     return multiplication        public void setMultiplication int multiplication    this multiplication   multiplication        You can test this setup by executing mvn jetty run on the command line  and then sending a POST request   URL         http   localhost 8080 test math mime type   application json post body      left   13    right    7     I used the Poster Firefox plugin to do this   Here s what the response looks like     addition  20  subtraction  6  multiplication  91

User · Answer

In case you are willing to use Curl for the calls with JSON 2 and Spring 3 2 0 in hand checkout the FAQ here  As AnnotationMethodHandlerAdapter is deprecated and replaced by  RequestMappingHandlerAdapter

User · Answer

If you do not want to configure the message converters yourself  you can use either   EnableWebMvc or  lt mvc annotation-driven   gt   add Jackson to the classpath and Spring will give you both JSON  XML  and a few other converters  by default  Additionally  you will get some other commonly used features for conversion  formatting and validation

[java] JQuery, Spring MVC @RequestBody and JSON - making it work together

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