Hibernate Error - Caused by: org.hibernate.DuplicateMappingException: duplicate import:

In hibernate, You cannot have two classes with the same name in the same or different packages else you will get an error at runtime like


"Caused by: org.hibernate.DuplicateMappingException: duplicate import: ....(try using auto-import="false")"


I have resolved this issue by adding property name on the Entity annotation.
Let us suppose I have Meta class in two different packages "com.database.user" and "com.database.group', you can resolve it as :

package com.database.user

@Entity(name= "com.database.user")

@Table(name="USER_META")

public class Meta

package com.database.group

@Entity(name= "com.database.group")

@Table(name="GROUP_META")

public class Meta

There must be some other ways too to resolve this issue, So please feel free to share it :)

How to upgrade ANT in Eclipse ?

To upgrade the ANT into the Eclipse, First you need to download the latest version of ANT anywhere on you machine.

Once you are done with the download then go to

Eclipse → Windows → Preferences → Ant → Runtime → Ant Home and Select the downloaded folder.

Now your Eclipse will use the latest version of ANT :)

How to exclude properties file from the Jar file

Problem Statement : Suppose your are working on Java Project which uses Maven structure where your source code is under “/src/main/java” and all your configuration files like .properties file or xml file are under “/src/main/resources” and as a final build your final package is a jar but you want without few files from your classpath. Be default Maven plugin adds all the file which comes under resources in jar file.

Solution : You can achieve the above task by using maven-jar-plugin as follows :

<plugin>

    <groupId>org.apache.maven.plugins</groupId>

    <artifactId>maven-jar-plugin</artifactId>

    <version>2.3</version>

    <configuration>

        <excludes>

            <exclude>**/otp.properties</exclude>

        </excludes>

    </configuration>

</plugin>