Question

从XML切换到基于代码的Spring配置后，“Hello World！”成功登录后返回页面。为什么Spring无法映射控制器的方法？

的AppConfig

@Configuration
@ComponentScan(basePackages = "app.controller")
public class AppConfig {}

SecurityConfig

@Configuration
@EnableWebSecurity
public class SecurityConfig  extends WebSecurityConfigurerAdapter {
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth
                .inMemoryAuthentication()
                    .withUser("a")
                        .password("a")
                        .roles("ADMIN");
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web
                .ignoring()
                .antMatchers("/resources/**"); // #3
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable()
                .authorizeRequests()
//                    .antMatchers("/signup","/about").permitAll() // #4
                    .antMatchers("/**").hasRole("ADMIN") // #6
                    .anyRequest().authenticated() // 7
                    .and()
                .formLogin()  // #8
//                .loginUrl("/login") // #9
                .permitAll(); // #5
    }
}

SecurityWebApplicationInitializer

public class SecurityWebApplicationInitializer extends AbstractSecurityWebApplicationInitializer {
}

WebMvcConfig

@EnableWebMvc
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    }
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
    @Bean
    public InternalResourceViewResolver jspViewResolver() {
        InternalResourceViewResolver bean = new InternalResourceViewResolver();
        bean.setPrefix("/WEB-INF/pages/");
        bean.setSuffix(".jsp");
        return bean;
    }
}

WebAppInitializer

public class WebAppInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext container) {
        // Create the 'root' Spring application context
        AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
        rootContext.register(AppConfig.class);
        rootContext.register(SecurityConfig.class);

        // Manage the lifecycle of the root application context
        container.addListener(new ContextLoaderListener(rootContext));

        // Create the dispatcher servlet's Spring application context
        AnnotationConfigWebApplicationContext dispatcherServlet = new AnnotationConfigWebApplicationContext();
        dispatcherServlet.register(WebMvcConfig.class);

        // Register and map the dispatcher servlet
        ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherServlet));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");

    }
}

AppController

@Controller
@RequestMapping("/")
public class AppController {
@RequestMapping(value = "/", method= RequestMethod.GET)
public String getRequestPage(Model model){
    return "request";
    }

我了解WebAppInitializer会链接AppConfig，WebMvcConfig和SecurityConfig。 SecurityWebApplicationInitializer似乎是孤独的阶级。 AppConfig假设因AppController而自动加载@ComponentScan。正确？为什么不起作用？

更新我index.jsp WEB-INF Hello World! <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %> <html> <head>.....</head>....</html>。的 UPDATE2 request.jsp

auth

UPDATE3 一句话：IDE强调Could not autowire. No beans of AuthenticationManagerBuilder type found AuthenticationManagerBuilder。index.jsp。 Official Spring example不包含index.jsp bean显式定义。为什么呢？

解决

我不知道为什么{{1}}会覆盖控制器映射。但是从WEB-INF中删除{{1}}解决了这个问题。它为什么会这样？

Answer 1

我认为问题是你的AppConfig。在WebAppInitializer中，您将AppConfig类添加到＆＃34;根上下文＆＃34;。这意味着，您的控制器将被扫描并添加到＆＃34;根上下文＆＃34;但是其余的MVC配置（WebMvcConfig）将在Web应用程序上下文中加载（通过DispatcherServlet）。

事实上，您根本不需要App配置。您可以在WebMvcConfig类中添加@ComponentScan注释，如下所示：

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = "app.controller")
public class WebMvcConfig extends WebMvcConfigurerAdapter {
 .... 
}

这应该让您的控制器被扫描并添加到Web应用程序上下文。

基于代码的Spring配置返回Hello World而不是预期的jsp页面

1 个答案: