创建初始化类，代替web.xml

在Servlet3.0环境中，容器会在类路径中查找实现javax.servlet.ServletContainerInitializer接口的类，如果找到的话就用它来配置Servlet容器。

Spring提供了这个接口的实现，名为SpringServletContainerInitializer，这个类反过来又会查找实现WebApplicationInitializer的类并将配置的任务交给它们来完成。Spring3.2引入了一个便利的WebApplicationInitializer基础实现，名为AbstractAnnotationConfigDispatcherServletInitializer，当我们的类扩展了AbstractAnnotationConfigDispatcherServletInitializer并将其部署到Servlet3.0容器的时候，容器会自动发现它，并用它来配置Servlet上下文。

public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer {

    /**

     * 指定spring的配置类

     * @return

     */

    @Override

    protected Class<?>[] getRootConfigClasses() {

        return new Class[]{SpringConfig.class};

    }

    /**

     * 指定SpringMVC的配置类

     * @return

     */

    @Override

    protected Class<?>[] getServletConfigClasses() {

        return new Class[]{WebConfig.class};

    }

    /**

     * 指定DispatcherServlet的映射规则，即url-pattern

     * @return

     */

    @Override

    protected String[] getServletMappings() {

        return new String[]{"/"};

    }

    /**

     * 添加过滤器

     * @return

     */

    @Override

    protected Filter[] getServletFilters() {

        CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter();

        encodingFilter.setEncoding("UTF-8");

        encodingFilter.setForceRequestEncoding(true);

        HiddenHttpMethodFilter hiddenHttpMethodFilter = new HiddenHttpMethodFilter();

        return new Filter[]{encodingFilter, hiddenHttpMethodFilter};

    }

}

创建SpringConfig配置类，代替spring的配置文件

@Configuration

public class SpringConfig {

	//ssm整合之后，spring的配置信息写在此类中

}

创建WebConfig配置类，代替SpringMVC的配置文件

@Configuration

//扫描组件

@ComponentScan("com.gonghr.springmvc.controller")

//开启MVC注解驱动

@EnableWebMvc

public class WebConfig implements WebMvcConfigurer {

    //使用默认的servlet处理静态资源

    @Override

    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

        configurer.enable();

    }

    //配置文件上传解析器

    @Bean

    public CommonsMultipartResolver multipartResolver(){

        return new CommonsMultipartResolver();

    }

    //配置拦截器

    @Override

    public void addInterceptors(InterceptorRegistry registry) {

        FirstInterceptor firstInterceptor = new FirstInterceptor();

        registry.addInterceptor(firstInterceptor).addPathPatterns("/**");

    }

    //配置视图控制

    @Override

    public void addViewControllers(ViewControllerRegistry registry) {

        registry.addViewController("/").setViewName("index");

    }

    //配置异常映射

    @Override

    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {

        SimpleMappingExceptionResolver exceptionResolver = new SimpleMappingExceptionResolver();

        Properties prop = new Properties();

        prop.setProperty("java.lang.ArithmeticException", "error");

        //设置异常映射

        exceptionResolver.setExceptionMappings(prop);

        //设置共享异常信息的键

        exceptionResolver.setExceptionAttribute("ex");

        resolvers.add(exceptionResolver);

    }

    //配置生成模板解析器

    @Bean

    public ITemplateResolver templateResolver() {

        WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();

        // ServletContextTemplateResolver需要一个ServletContext作为构造参数，可通过WebApplicationContext 的方法获得

        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(

                webApplicationContext.getServletContext());

        templateResolver.setPrefix("/WEB-INF/templates/");

        templateResolver.setSuffix(".html");

        templateResolver.setCharacterEncoding("UTF-8");

        templateResolver.setTemplateMode(TemplateMode.HTML);

        return templateResolver;

    }

    //生成模板引擎并为模板引擎注入模板解析器

    @Bean

    public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver) {

        SpringTemplateEngine templateEngine = new SpringTemplateEngine();

        templateEngine.setTemplateResolver(templateResolver);

        return templateEngine;

    }

    //生成视图解析器并未解析器注入模板引擎

    @Bean

    public ViewResolver viewResolver(SpringTemplateEngine templateEngine) {

        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();

        viewResolver.setCharacterEncoding("UTF-8");

        viewResolver.setTemplateEngine(templateEngine);

        return viewResolver;

    }

}

测试功能

@RequestMapping("/")

public String index(){

    return "index";

}

巴特西

【SpringMVC】完全注解配置SpringMVC

创建初始化类，代替web.xml

创建SpringConfig配置类，代替spring的配置文件

创建WebConfig配置类，代替SpringMVC的配置文件

测试功能

最新文章

热门文章