Swagger.txt

implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.3'

Modify the content

@Api(value = "Swagger2DemoRestController", description = "REST Apis related to Student Entity!!!!")
@RestController
public class Swagger2DemoRestController {
 
    List<Student> students = new ArrayList<Student>();
    {
        students.add(new Student("Sajal", "IV", "India"));
        students.add(new Student("Lokesh", "V", "India"));
        students.add(new Student("Kajal", "III", "USA"));
        students.add(new Student("Sukesh", "VI", "USA"));
    }
 
    @ApiOperation(value = "Get list of Students in the System ", response = Iterable.class, tags = "getStudents")
    @ApiResponses(value = { 
            @ApiResponse(code = 200, message = "Suceess|OK"),
            @ApiResponse(code = 401, message = "not authorized!"), 
            @ApiResponse(code = 403, message = "forbidden!!!"),
            @ApiResponse(code = 404, message = "not found!!!") })
 
    @RequestMapping(value = "/getStudents")
    public List<Student> getStudents() {
        return students;
    }
 
    @ApiOperation(value = "Get specific Student in the System ", response = Student.class, tags = "getStudent")
    @RequestMapping(value = "/getStudent/{name}")
    public Student getStudent(@PathVariable(value = "name") String name) {
        return students.stream().filter(x -> x.getName().equalsIgnoreCase(name)).collect(Collectors.toList()).get(0);
    }
 
    @ApiOperation(value = "Get specific Student By Country in the System ", response = Student.class, tags = "getStudentByCountry")
    @RequestMapping(value = "/getStudentByCountry/{country}")
    public List<Student> getStudentByCountry(@PathVariable(value = "country") String country) {
        System.out.println("Searching Student in country : " + country);
        List<Student> studentsByCountry = students.stream().filter(x -> x.getCountry().equalsIgnoreCase(country))
                .collect(Collectors.toList());
        System.out.println(studentsByCountry);
        return studentsByCountry;
    }
 
    // @ApiOperation(value = "Get specific Student By Class in the System ",response = Student.class,tags="getStudentByClass")
    @RequestMapping(value = "/getStudentByClass/{cls}")
    public List<Student> getStudentByClass(@PathVariable(value = "cls") String cls) {
        return students.stream().filter(x -> x.getCls().equalsIgnoreCase(cls)).collect(Collectors.toList());
    }
}