java.lang.NoClassDefFoundError: org/apache/commons/collections/Transformer

Question

I am receiving the following error java.lang.NoClassDefFoundError: org/apache/commons/collections/Transformer trying to use BeanMap from the Apache Commons BeanUtils library.

It is generated from the following code: BeanMap studentBeanMap = new BeanMap(cohortStudentData.get(row)); where cohortStudentData is a list of beans.

I am using BeanListHandler from Apache DBUtils to form the list of beans from a database.

I understand from this and this bug report that BeanMap is dependant on the Apache Collections framework. However, I have imported all relevant libraries into my project and into my class, as you can see below:

External Library List

Import Statements

Does anyone know why this might be happening?

You need an older version of commons-collections. Currently you are using commons-collections4 (note the 4 here) - but the exception tells you that org.apache.commons.collections.Transformer (no 4 in here) is required. Try an download version commons-collections-3. — fateddy
– fateddy, Commented Feb 28, 2015 at 5:23

Ivan Perales M. · Accepted Answer · 2015-02-28 05:23:18Z

12

I am not really sure, but i think your error is because of jar versions. Lately apache has changed the package of the new versions of their jars because they implement new functionality or something that is not fully backward compatible. For example the jar commons-beanutils-1.9.2.jar depends on commons-collections-3.2.1.jar (according to this site) and you are using commons-collections-4.4.0.jar. If you are planning using the universe of apache jars, you need to be sure that they are all compatible.

answered Feb 28, 2015 at 5:23

Ivan Perales M.

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zygimantus · Accepted Answer · 2016-01-06 09:34:20Z

9

Just add this dependency to your project.

    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.2</version>
    </dependency>

answered Jan 6, 2016 at 9:34

zygimantus

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1 Comment

Abhilash Ramteke Over a year ago

commons-collections4 doesn't work.

Manimaran Samuthirapandi · Accepted Answer · 2017-03-21 13:47:30Z

2

commons-collections4-x.x.jar Add the library to your classpath and try to run again. It will work.

Download the library from: https://mvnrepository.com/artifact/org.apache.commons/commons-collections4/4.1

answered Mar 21, 2017 at 13:47

Manimaran Samuthirapandi

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thedevd · Accepted Answer · 2018-01-03 11:31:51Z

1

Adding dependency of version 3.2.1 seems working here

<dependency>
    <groupId>commons-collections</groupId>
    <artifactId>commons-collections</artifactId>
    <version>3.2.1</version>
</dependency>

answered Jan 3, 2018 at 11:31

thedevd

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smos Over a year ago

Not a safe solution as there is a known vulnerability in that version. The suggestion is to move to 3.2.2 or commons-collections4-4.2.

Yoshita Mahajan · Accepted Answer · 2020-12-31 10:59:45Z

0

Add commons-collections-3.2.jar to library of the project

answered Dec 31, 2020 at 10:59

Yoshita Mahajan

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