swagger oauth2 client credentials spring boot code example

Example: spring swagger ui login oauth2

@Configuration
@EnableSwagger2
public class SpringFoxConfig implements WebMvcConfigurer {

	private String accessTokenUri = "http://localhost:8080/oauth/token";

	@Bean
	public Docket api() {

		return new Docket(DocumentationType.SWAGGER_2).select()
				.apis(RequestHandlerSelectors.basePackage("com.gft.desafioapi")).paths(PathSelectors.any()).build()
				.apiInfo(apiInfo())
				.tags(new Tag("Fornecedores", "Gerencia os fornecedores"), new Tag("Clientes", "Gerencia os clientes"),
						new Tag("Produtos", "Gerencia os produtos"), new Tag("Vendas", "Gerencia as vendas"))
				.securityContexts(Collections.singletonList(securityContext()))
				.securitySchemes(Arrays.asList(securitySchema()));
	}

	private OAuth securitySchema() {

		List<AuthorizationScope> authorizationScopeList = new ArrayList<>();
		authorizationScopeList.add(new AuthorizationScope("read", "read all"));

		List<GrantType> grantTypes = new ArrayList<>();
		GrantType passwordCredentialsGrant = new ResourceOwnerPasswordCredentialsGrant(accessTokenUri);

		grantTypes.add(passwordCredentialsGrant);

		return new OAuth("oauth2", authorizationScopeList, grantTypes);

	}

	private SecurityContext securityContext() {
		return SecurityContext.builder().securityReferences(defaultAuth()).forPaths(PathSelectors.ant("/api/**"))
				.build();
	}

	private List<SecurityReference> defaultAuth() {

		final AuthorizationScope[] authorizationScopes = { new AuthorizationScope("read", "read all") };

		return Collections.singletonList(new SecurityReference("oauth2", authorizationScopes));
	}

	@Bean
	public SecurityConfiguration securityInfo() {
		return new SecurityConfiguration("admin", "admin", "", "", "Bearer access token", ApiKeyVehicle.HEADER,
				HttpHeaders.AUTHORIZATION, "");
	}

	public ApiInfo apiInfo() {
		return new ApiInfoBuilder().title("GFT - Desafio API")
				.description("API construida para o desafio do programa START GFT").version("1")
				.contact(new Contact("GFT", "https://www.gft.com", "[email protected]")).build();
	}
}