How to write composite key mapping for hibernate?

A composite primary key is one that has many columns at least two. For creating a database MYSQL script is required. Hibernate is an ORM (Object Relations Mapping) tool which is an standard interface of Java Persistence API. To write composite key mapping for Hibernate you can use two annotations which are Embedded ID and IdClass. These annotations help in denoting the primary composite key. First of all, you need to create a database table that constitutes the primary composite key. Then you need to proceed with the project structure and required dependencies. After receiving the hibernate mapping file, run the application and you are done with the mapping.