MessageBodyReader not found for media type=application/json

Question

You can use jersey json library:

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.22</version>
</dependency>

Or genson:

<dependency>
    <groupId>com.owlike</groupId>
    <artifactId>genson</artifactId>
    <version>1.3</version>
</dependency>

Sorry to resurrect this post, but I was having this problem with a Maven project and found that I needed to include a dependency for jackson-jaxrs-json-provider in my pom:

<dependency>
    <groupId>com.fasterxml.jackson.jaxrs</groupId>
    <artifactId>jackson-jaxrs-json-provider</artifactId>
    <version>2.4.1</version>
</dependency>

MVN Repository: http://mvnrepository.com/artifact/com.fasterxml.jackson.jaxrs/jackson-jaxrs-json-provider

Your entity class does not have an empty constructor, which is needed for the JAX-RS unmarshalling.

Have a look here:

https://blogs.oracle.com/groundside/entry/jax_rs_2_0_messagebodyreader

Check if you are registering the media type for JSON support. Do you have jersey-media-moxy on your class-path? If not, add this dependency to your pom.xml, please check your jersey version, in this example I'm using Jersey 2 (2.24)

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-moxy</artifactId>
        <version>2.24</version>
    </dependency>

For Gradle, add the following dependency:

compile group: 'org.glassfish.jersey.media',
name         : 'jersey-media-moxy',
version      : '2.24.1'