JsonPath NoClassDefFoundError, or an alternative to JsonPath in Java

If You are using Maven or Gradle, just need to add this to your dependencies list:

For Maven projects:

In your Maven pom.xml file :

<dependency>    <groupId>com.jayway.jsonpath</groupId>    <artifactId>json-path</artifactId>    <version>2.2.0</version>    <scope>test</scope></dependency>

For Gradle projects:

In the dependencies section in your Gradle build.gradle file

    testCompile 'com.jayway.jsonpath:json-path:2.2.0'

It should work

I think you have to add these dependencies to your project:https://code.google.com/p/json-path/downloads/detail?name=json-path-0.8.0-dependencies.zip&can=2&q=

In particular json-smart-1.1.jar where the missing Exception class is contained.

When there are conflicting versions of json-smart, if the older version is picked which does not have the expected class.

How to fix

Verify the versions with mvn dependency:tree.

Below, there's net.minidev:json-smart:jar:1.1.1:compile and com.jayway.jsonpath:json-path:jar:1.1.0:test which uses latest version of json-smart.

$ mvn clean dependency:tree | grep json[INFO] +- net.logstash.log4j:jsonevent-layout:jar:1.7:compile[INFO] |  +- net.minidev:json-smart:jar:1.1.1:compile[INFO] |  +- io.spray:spray-json_2.11:jar:1.3.3:compile[INFO] |  +- org.json:json:jar:20160810:compile[INFO] +- com.github.fge:json-schema-validator:jar:2.2.6:compile[INFO] |  +- com.github.fge:json-schema-core:jar:1.2.5:compile[INFO] |  |  +- org.skyscreamer:jsonassert:jar:1.4.0:test[INFO] |  |  |  \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test[INFO] +- com.jayway.jsonpath:json-path:jar:1.1.0:test[INFO] |  |  |  |  +- io.gatling:jsonpath_2.10:jar:0.6.1:test[INFO] |  |  |  |  +- io.fastjson:boon:jar:0.28:test

So, exclude the older version of json-smart from dependency as json-path has latest version of json-smart.

eg.

    <dependency>        <groupId>net.logstash.log4j</groupId>        <artifactId>jsonevent-layout</artifactId>        <version>1.7</version>        <scope>compile</scope>        <exclusions>            <exclusion>                <groupId>net.minidev</groupId>                <artifactId>json-smart</artifactId>            </exclusion>        </exclusions>    </dependency>