목차

• Spring MVC - ArgumentResolver
• Spring MVC Request Life Cycle - ViewResolver
• Spring MVC Request Life Cycle - HandlerAdapter
• Spring MVC Request Life Cycle - HandlerMapping
• Spring MVC Request Life Cycle - DispatcherServlet
• Spring MVC Request Life Cycle - Interceptor
• Spring MVC Request Life Cycle - Filter

Spring MVC Request Life Cycle - ViewResolver

1. 핸들러 어뎁터 호출
2. ViewResolver 호출

spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp

ViewResolver.java

public interface ViewResolver {
    @Nullable
    View resolveViewName(String viewName, Locale locale) throws Exception;
}

스프링 부투에서는 InternalResourceViewResolver 를 등록할때 spring.mvc.view.prefix, spring.mvc.view.suffix 설정 정보를 갖고와 등록해준다.

public InternalResourceViewResolver(String prefix, String suffix) {
    this();
    setPrefix(prefix);
    setSuffix(suffix);
}

InternalResourceViewResolver.java

public class InternalResourceViewResolver extends UrlBasedViewResolver {

    private static final boolean jstlPresent = ClassUtils.isPresent("javax.servlet.jsp.jstl.core.Config",
            InternalResourceViewResolver.class.getClassLoader());

    @Nullable
    private Boolean alwaysInclude;

    public InternalResourceViewResolver() {
        Class<?> viewClass = requiredViewClass();
        if (InternalResourceView.class == viewClass && jstlPresent) {
            viewClass = JstlView.class;
        }
        setViewClass(viewClass);
    }

    public InternalResourceViewResolver(String prefix, String suffix) {
        this();
        setPrefix(prefix);
        setSuffix(suffix);
    }

    public void setAlwaysInclude(boolean alwaysInclude) {
        this.alwaysInclude = alwaysInclude;
    }

    @Override
    protected Class<?> requiredViewClass() {
        return InternalResourceView.class;
    }

    @Override
    protected AbstractUrlBasedView instantiateView() {
        return (getViewClass() == InternalResourceView.class ? new InternalResourceView()
                : (getViewClass() == JstlView.class ? new JstlView() : super.instantiateView()));
    }

    @Override
    protected AbstractUrlBasedView buildView(String viewName) throws Exception {
        InternalResourceView view = (InternalResourceView) super.buildView(viewName);
        if (this.alwaysInclude != null) {
            view.setAlwaysInclude(this.alwaysInclude);
        }
        view.setPreventDispatchLoop(true);
        return view;
    }
}