<!-- Swagger -->
<plugin>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>2.3.1</version>
    <executions>
        <execution>
            <id>contract-service</id>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec>${basedir}/src/main/resources/swagger/rest-data-exchange-format.yaml</inputSpec>
                <artifactId>contract-service</artifactId>
                <output>${basedir}/target/generated-sources</output>
                <language>spring</language>
                <modelPackage>ru.payhub.rest.v1.model</modelPackage>
                <apiPackage>ru.payhub.rest.v1.api</apiPackage>
                <!-- <invokerPackage>ru.payhub.rest.v1.handler</invokerPackage> -->
                <generateSupportingFiles>false</generateSupportingFiles>
                <configOptions>
                    <sourceFolder>src/main/java</sourceFolder>
                    <interfaceOnly>true</interfaceOnly>
                    <library>spring-boot</library>
                    <dateLibrary>${generator.datelibrary}</dateLibrary>
                    <configPackage>ru.payhub.config</configPackage>
                    <singleContentTypes>true</singleContentTypes>
                </configOptions>
            </configuration>
        </execution>
    </executions>
</plugin>

Official parametrs description here

Swagger syntax specification here

On this example maven plugin, used swagger data-model file (yaml) generate model classes for use it in the controllers.

The v3 swagger codegen maven plugin released April 2019 generates working Java client libraries from an OpenAPI 3.0 spec, I'm using this Maven pom.xml plugin config:

<plugin>
    <groupId>io.swagger.codegen.v3</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>3.0.8</version>
    <executions>
    ..

All the rest of the configuration and configOptions entries are unchanged from version 2.4.5. I had to replace the old annotation dependency with the following so the client code would compile:

    <dependency>
        <groupId>io.swagger.core.v3</groupId>
        <artifactId>swagger-annotations</artifactId>
        <version>2.0.8</version>
    </dependency>

Per request from @kozla13 below I added a complete POM example.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <!-- This groupId will NOT allow deployment in LF -->
    <groupId>org.example.swaggerapi.client</groupId>
    <artifactId>swagger-client</artifactId>
    <name>Example</name>
    <version>0.0.1-SNAPSHOT</version>
    <properties>
        <java.version>11</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <client.base.package.name>org.example.so</client.base.package.name>
    </properties>
    <dependencies>
        <!-- Required for Java 9 and later -->
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>io.swagger.core.v3</groupId>
            <artifactId>swagger-annotations</artifactId>
            <version>2.0.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.10.RELEASE</version>
        </dependency>
        <!-- HTTP client: Spring RestTemplate -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.1.10.RELEASE</version>
        </dependency>
        <!-- JSON processing: jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.9</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-json-provider</artifactId>
            <version>2.9.9</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>2.9.9</version>
        </dependency>
        <!-- test dependencies -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.3.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <!-- This 2019 version is required for OpenAPI 3 -->
                <groupId>io.swagger.codegen.v3</groupId>
                <artifactId>swagger-codegen-maven-plugin</artifactId>
                <version>3.0.8</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <configuration>
                            <inputSpec>${project.basedir}/ric-plt-a1/a1/openapi.yaml</inputSpec>
                            <language>java</language>
                            <packageName>${client.base.package.name}</packageName>
                            <modelPackage>${client.base.package.name}.model</modelPackage>
                            <apiPackage>${client.base.package.name}.api</apiPackage>
                            <invokerPackage>${client.base.package.name}.invoker</invokerPackage>
                            <configOptions>
                                <groupId>${project.groupId}</groupId>
                                <artifactId>${project.artifactId}</artifactId>
                                <artifactVersion>${project.version}</artifactVersion>
                                <library>resttemplate</library>
                                <java8>true</java8>
                                <dateLibrary>java8</dateLibrary>
                                <licenseName>Apache 2.0</licenseName>
                                <licenseUrl>https://www.apache.org/licenses/LICENSE-2.0</licenseUrl>
                            </configOptions>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>