How to generate swagger.json

Question

I am using java spring boot framework to create REST api for my project and I am using "springfox-swagger2 and springfox-swagger-ui" for generating swagger documentation. I am able to see my documentation using the URL http://localhost:8080/swagger-ui.html.

How can I create or generate swagger.json / spec.json, The documentation should not be with this application, we are using a separate application for listing the API docs.

Answer 1

I have done this with a small trick

I have added the following code in the end of my home controller test case

import org.springframework.boot.test.web.client.TestRestTemplate;

public class HomeControllerTest extends .... ...... {

@Autowired
private TestRestTemplate restTemplate;


@Test
public void testHome() throws Exception {
     //.......
     //... my home controller test code 
     //.....

    String swagger = this.restTemplate.getForObject("/v2/api-docs", String.class);

    this.writeFile("spec.json", swagger );
}

public void writeFile(String fileName, String content) {

    File theDir = new File("swagger");

    if (!theDir.exists()) {
        try{
            theDir.mkdir();
        } 
        catch(SecurityException se){ }        
    }

    BufferedWriter bw = null;
    FileWriter fw = null;
    try {
        fw = new FileWriter("swagger/"+fileName);
        bw = new BufferedWriter(fw);
        bw.write(content);
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (bw != null)
                bw.close();
            if (fw != null)
                fw.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }

}
}

I don't know this is right way or not But it is working :)

Dependency

    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.4.0</version>
    </dependency>

    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.6.1</version>
    </dependency>