Jersey + Json media type application/json was not found

Question

I am trying with simple Jersey + JSON example but I get following error message body writer for Java class com.test.jsonexample and MIME media type application/json w

Answer 1

First of all if your @POST web-service returns a response you must add @Produces annotation.

Ensure that jersey-json lib is in your classpath. Try removing the toString() method because it may broke the beans structure format.

Answer 2

Add the following dependency to solve the problem

"javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class com.test.Jsonexample, and Java type class com.test.Jsonexample, and MIME media type application/json was not found
    at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285)"

Solution :

<dependency>
    <groupId>com.sun.jersey</groupId>
    <artifactId>jersey-bundle</artifactId>
    <version>1.18</version>
</dependency>

Answer 3

This problem is fixed with jersey-bundle-1.8.jar

Answer 4

When using jersey-bundle-1.19.1.jar (non-maven) I had to remove this:

<init-param>
  <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
  <param-value>true</param-value>
</init-param>

from web.xml file.

I know that documentation suggests this section is necessary but surprisingly it was a reason of the problem.

Answer 5

Fixed issue by adding the following to my pom.xml:

    <dependency>
        <groupId>com.owlike</groupId>
        <artifactId>genson</artifactId>
        <version>0.99</version>
    </dependency>

Documentation can be found at: https://code.google.com/p/genson/

Answer 6

For new version of Maven, if you have dependency problems, here is a good official reference: https://jersey.java.net/documentation/latest/modules-and-dependencies.html#d0e383 (Section 2.3.1, 2.3.2)

And also here is a good tutorial for installing maven and tuto of Jersey in eclipse: http://javaposts.wordpress.com/2012/01/14/maven-rest-jersey-eclipse-tutorial/

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet</artifactId>
    <version>2.0</version>
    <scope>provided</scope>
</dependency>
<!-- if you are using Jersey client specific features -->
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-client</artifactId>
    <version>2.0</version>
    <scope>provided</scope>
</dependency>