Spring MVC의 주요 장점 분석: 왜 그렇게 인기가 있을까?

@Controller
public class UserController {
    
    @Autowired
    private UserService userService;
    
    @RequestMapping("/user/{id}")
    public ModelAndView getUser(@PathVariable("id") int id) {
        User user = userService.getUserById(id);
        ModelAndView modelAndView = new ModelAndView("user");
        modelAndView.addObject("user", user);
        return modelAndView;
    }
    
}

@Controller
public class UserController {
    
    @Autowired
    private UserService userService;
    
    @RequestMapping("/user/{id}")
    public ModelAndView getUser(@PathVariable("id") int id) {
        User user = userService.getUserById(id);
        ModelAndView modelAndView = new ModelAndView("user");
        modelAndView.addObject("user", user);
        return modelAndView;
    }
    
}

@Service
public class UserService {
    
    public User getUserById(int id) {
        // 从数据库或其他数据源中获取用户信息
        // ...
        return user;
    }
    
}

// 单元测试
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {UserController.class, UserService.class})
public class UserControllerTest {
    
    @Autowired
    private MockMvc mockMvc;
    
    @Test
    public void testGetUser() throws Exception {
        mockMvc.perform(get("/user/1"))
                .andExpect(status().isOk())
                .andExpect(view().name("user"))
                .andExpect(model().attributeExists("user"));
    }
    
}

@Configuration
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoggingInterceptor());
    }
    
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
    }
    
    // ...
    
}