Spring Boot with Jersey and Swagger Example

This is an example on how to integrate Spring Boot, with Jersey, Swagger, and Swager UI.

Changes Needed

Swagger Configuration

You need the following swagger dependency:

<dependency>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-jersey2-jaxrs</artifactId>
    <version>${swagger.jersey2.version}</version>
</dependency>

Heare are the Swagger configuration changes required to generate the swagger.json by the io.swagger:swagger-jersey2-jaxrs library:

@Configuration
public class JerseyConfiguration extends ResourceConfig {

    @Autowired
    public JerseyConfiguration() throws UnknownHostException {
        register(BookController.class);
        configureSwagger();
        property(ServletProperties.FILTER_FORWARD_ON_404, true);
    }

    public void configureSwagger() {
        this.register(ApiListingResource.class);
        this.register(SwaggerSerializers.class);
        BeanConfig config = new BeanConfig();
        config.setConfigId("spring-jersey-swagger-example");
        config.setTitle("Spring, Jersey, and Swagger Example");
        config.setVersion("1.0.0");
        config.setBasePath("/");
        config.setResourcePackage("com.basaki");
        config.setScan(true);
    }
}

Swagger UI Static Resources

1. Download the Swagger UI static resources from here
2. Copy the downloaded resources to /target/classes/static folder.
3. Rename the index.html in /target/classes/static to swagger-ui.html.
4. Replace the http://petstore.swagger.io/v2/swagger.json string in swagger-ui.html to swagger.json.

In this example, all these changes are executed dynamically during the build process by the plugins specified in pom.xml.

By default, Spring Boot configures the Jersey servlet container as a servlet.

By default Jersey will be set up as a Servlet in a @Bean of type ServletRegistrationBean named jerseyServletRegistration. You can disable or override that bean by creating one of your own with the same name. You can also use a Filter instead of a Servlet by setting spring.jersey.type=filter (in which case the @Bean to replace or override is jerseyFilterRegistration).

It needs to be changed into a filter in order to pickup the Swagger static resources. It can be achieved by modifying the application.ymlfile:

spring:
  jersey:
    type: filter

You also need the following dependency to view swagger-ui.html,

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.12.RELEASE</version>
</dependency>

Build

To build the JAR, execute the following command from the parent directory:

mvn clean install

Run

To run the application fromm command line,

java -jar target/spring-jersey-swagger-example-1.0.0.jar

Access Swagger Endpoints

Swagger UI

You can view the Swagger UI at http://localhost:8080/swagger-ui.html.

Swagger JSON

You can view Swagger JSON doc at http://localhost:8080/swagger.json