SpringMVC 구현

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폴더 구조

build.gradle

apply plugin: 'war'  
apply plugin: 'java'  
  
group 'spring.sample'  
version '1.0-SNAPSHOT'  

webAppDirName = "src/main/webapp"

war {  
}  
  
repositories {  
    mavenCentral()  
}  
  
dependencies {  
    implementation 'org.springframework:spring-web:5.3.22'  
    implementation 'javax.servlet:javax.servlet-api:4.0.1'  
    implementation 'org.springframework:spring-webmvc:5.3.8'  
    implementation 'org.springframework:spring-context:5.3.22'  
  
//    implementation 'org.springframework:spring-core:5.3.22'  
//    implementation 'org.springframework:spring-context:5.3.22'  
  
    implementation 'log4j:log4j:1.2.17'  
  
    testImplementation 'org.springframework:spring-test:5.3.8'  
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'  
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'  
}  
  
test {  
    useJUnitPlatform()  
}

• junit : 단위테스트
• log4j : 로깅
• spring-web : WebApplicationInitializer, DispatcherServlet, @RestController, @RequestMapping, @GetMapping
• spring-context : @ComponentScan, @Configuration
• javax.servlet : ServletRegistration

WebApplicationInitializer

public class ApplicationInitializer implements WebApplicationInitializer {  
    @Override  
    public void onStartup(ServletContext servletContext) throws ServletException {  
  
        AnnotationConfigWebApplicationContext webContext = new AnnotationConfigWebApplicationContext();  
        webContext.register(WebConfigration.class);  
  
        AnnotationConfigWebApplicationContext apiContext = new AnnotationConfigWebApplicationContext();  
        apiContext.register(APIConfiguration.class);  
  
        DispatcherServlet webDispatcherServlet = new DispatcherServlet(webContext);  
        DispatcherServlet apiDispatcherServlet = new DispatcherServlet(apiContext);  
  
        ServletRegistration.Dynamic webDispatcher = servletContext.addServlet("webDispatcher", webDispatcherServlet);  
        webDispatcher.addMapping("/web/*");  
  
        ServletRegistration.Dynamic apiDispatcher = servletContext.addServlet("apiDispatcher", apiDispatcherServlet);  
        apiDispatcher.addMapping("/api/*");  
    }  
}

• API Listener만 추가하는 방법

@Override  
public void onStartup(ServletContext servletContext) throws ServletException {  
    AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();  
	rootContext.register(APIConfiguration.class);  
  
// Manage the lifecycle of the root application context  
	servletContext.addListener(new ContextLoaderListener(rootContext));

	AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();  
	dispatcherContext.register(WebConfigration.class);  
	  
	// Register and map the dispatcher servlet  
	ServletRegistration.Dynamic dispatcher =  
	        servletContext.addServlet("web", new DispatcherServlet(dispatcherContext));  
	//dispatcher.setLoadOnStartup(1);  
	dispatcher.addMapping("/");
}

• DispatcherServlet 등록 필수!

Configuration

• RESTAPI 설정

@Configuration  
@ComponentScan(basePackages = "org.infinity.server.controller.api")  
public class APIConfiguration {  
}

• Web설정

@EnableWebMvc  
@ComponentScan(basePackages = "org.infinity.server.controller.web")  
public class WebConfigration implements WebMvcConfigurer {  
    @Override  
    public void configureViewResolvers(ViewResolverRegistry registry) {  
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();  
        resolver.setPrefix("/WEB-INF/");  
        resolver.setSuffix(".jsp");  
        registry.viewResolver(resolver);  
    }  
}

Test Controller

• API Test

@Controller  
@RequestMapping("/test")  
public class apiTestController {  
    @GetMapping("")  
    @ResponseBody  
    public String testString(){  
        return "test";  
    }  
}

• View Test

@Controller  
@RequestMapping("/test")  
public class webController {  
    @GetMapping("")  
    public ModelAndView getMainPage(){  
        ModelAndView mv = new ModelAndView();  
        mv.setViewName("test");  
        return mv;  
    }  
}

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연결문서

• WebMvcConfigurer