java.lang.ClassNotFoundException: com.fasterxml.jackson.annotation.JsonInclude$Value

63
votes

I am trying to convert my json string to java object and I am getting error

Exception in thread "main" java.lang.NoClassDefFoundError: com/fasterxml/jackson/annotation/JsonInclude$Value at com.fasterxml.jackson.databind.cfg.MapperConfig.(MapperConfig.java:45) at com.fasterxml.jackson.databind.ObjectMapper.(ObjectMapper.java:535) at com.fasterxml.jackson.databind.ObjectMapper.(ObjectMapper.java:452) at com.allianz.cmis.util.ApacheHttpClientGet.main(ApacheHttpClientGet.java:65) Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.annotation.JsonInclude$Value at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 4 more

Here is my json string and my code snippet

json string {'ctpnsw': [{'abc' , 'def' }]}

model

public class Fields {

     private List<String> ctpnsw;

    public List<String> getCtpnsw() {
        return ctpnsw;
    }

    public void setCtpnsw(List<String> ctpnsw) {
        this.ctpnsw = ctpnsw;
    }

}

Java code

ObjectMapper mapper = new ObjectMapper(); List<Fields> list = mapper.readValue(output, TypeFactory.defaultInstance().constructCollectionType(List.class,Fields.class)); System.out.println(list);

9
javajacksonwordpress-json-api

9 Answers

61
votes

How about adding this to your pom.xml

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>${jackson.version}</version>
</dependency>
48
votes

Jackson marshalling/unmarshalling requires following jar files of same version.

  1. jackson-core

  2. jackson-databind

  3. jackson-annotations

    Make sure that you have added all these with same version in your classpath. In your case jackson-annotations is missing in classpath.

26
votes

I had the same error message. In my case, Jackson consisted of multiple JAR files. Sadly, they had different versions of jackson-core and jackson-annotations which resulted in the above exception.

Maybe you don't have the jackson-annotation JAR in your classpath, at least not in the correct version. You can analyze the used library versions with the command mvn dependency:tree.

14
votes

Even though this answer was too late, I'm adding it because I also went through a horrible time finding answer for the same matter. Only different was, I was struggling with AWS Comprehend Medical API.

At the moment I'm writing this answer, if anyone come across the same issue with any AWS SDKs please downgrade jackson-annotaions or any jackson dependencies to 2.8.* versions. The latest 2.9.* versions does not working properly with AWS SDK for some reason. Anyone have any idea about the reason behind that feel free to comment below.

Just in case if anyone is lazy to google maven repos, I have linked down necessary repos.Check them out!

13
votes

I had different version of annotations jar. Changed all 3 jars to use SAME version of databind,annotations and core jackson jars

<dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.8.6</version>
</dependency>
2
votes

Get all 3 jackson jars and add them to your build path:

https://mvnrepository.com/artifact/com.fasterxml.jackson.core

2
votes

Use jackson-bom which will have all the three jackson versions.i.e.jackson-annotations, jackson-core and jackson-databind. This will resolve the dependencies related to those versions

0
votes

this is a version problem change version > 2.4 to 1.9 solve it

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

to

<dependency>  
<groupId>org.codehaus.jackson</groupId>  
<artifactId>jackson-mapper-asl</artifactId>  
<version>1.9.4</version>

-3
votes

Use Jackson-annotations.jar will solve the problem, as it worked for me.