注解配置Springmvc - SpringMVC

发表于 更新于 阅读次数： Valine：

创建初始化类，代替web.xml

public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer {

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/**
 * 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};
}

配置代替springmvc的文件

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//标记为配置文件
@Configuration
//扫描组件
@ComponentScan("com.atguigu.mvc.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) {
        //使默认的处理可用
        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) {
        //创建拦截器规则
        FirstInterceptor firstInterceptor = new FirstInterceptor();
       //添加拦截路径，拦截所有，与/*不同
        registry.addInterceptor(firstInterceptor).addPathPatterns("/**");
    }
    
    //配置视图控制
    
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
       //找到/时，对应index羊肉面
        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();
        //设置异常对应的对象，以及将要对应的页面
        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;
    }


}