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Spring PetClinic Sample Application

Understanding the Spring Petclinic application with a few diagrams

<a href="">See the presentation here</a>

Running petclinic locally

    git clone
    cd spring-petclinic
    ./mvnw spring-boot:run

You can then access petclinic here: http://localhost:8080/

<img width="1042" alt="petclinic-screenshot" src="">

In case you find a bug/suggested improvement for Spring Petclinic

Our issue tracker is available here:

Database configuration

In its default configuration, Petclinic uses an in-memory database (HSQLDB) which
gets populated at startup with data. A similar setup is provided for MySql in case a persistent database configuration is needed.
Note that whenever the database type is changed, the file needs to be updated and the mysql-connector-java artifact from the pom.xml needs to be uncommented.

You could start a MySql database with docker:

docker run -e MYSQL_ROOT_PASSWORD=petclinic -e MYSQL_DATABASE=petclinic -p 3306:3306 mysql:5.7.8

Working with Petclinic in Eclipse/STS


The following items should be installed in your system:

Note: when m2e is available, there is an m2 icon in Help -> About dialog.
If m2e is not there, just follow the install process here:


1) In the command line

git clone

2) Inside Eclipse

File -> Import -> Maven -> Existing Maven project

Looking for something in particular?

Spring Boot Configuration Class or Java property files
The Main Class PetClinicApplication
Properties Files
Caching CacheConfig

Interesting Spring Petclinic branches and forks

The Spring Petclinic master branch in the main
GitHub org is the "canonical" implementation, currently based on
Spring Boot and Thymeleaf. There are quite a few forks in a special
GitHub org spring-petclinic. If
you have a special interest in a different technology stack that could
be used to implement the Pet Clinic then please join the community

Link Main technologies
spring-framework-petclinic Spring Framework XML configuration, JSP pages, 3 persistence layers: JDBC, JPA and Spring Data JPA
javaconfig branch Same frameworks as the spring-framework-petclinic but with Java Configuration instead of XML
spring-petclinic-angular1 AngularJS 1.x, Spring Boot and Spring Data JPA
spring-petclinic-microservices Distributed version of Spring Petclinic built with Spring Cloud
spring-petclinic-reactjs ReactJS (with TypeScript) and Spring Boot

Interaction with other open source projects

One of the best parts about working on the Spring Petclinic application is that we have the opportunity to work in direct contact with many Open Source projects. We found some bugs/suggested improvements on various topics such as Spring, Spring Data, Bean Validation and even Eclipse! In many cases, they've been fixed/implemented in just a few days.
Here is a list of them:

Name Issue
Spring JDBC: simplify usage of NamedParameterJdbcTemplate SPR-10256 and SPR-10257
Bean Validation / Hibernate Validator: simplify Maven dependencies and backward compatibility HV-790 and HV-792
Spring Data: provide more flexibility when working with JPQL queries DATAJPA-292


The issue tracker is the preferred channel for bug reports, features requests and submitting pull requests.

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