[Java知识库] SpringMVC 基于注解的配置

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[Java知识库]SpringMVC 基于注解的配置

开发工具:IntelliJ IDEA 2021.3.3 (Community Edition)

项目结构：

?前端使用了AdminLTE框架

Marven 依赖：spring-webmvc及thymeleaf-spring5

基于注解的方式替代web.xml配置文件

主要有如下几个类：

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class AppInitilizer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{RootConfiguration.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfiguration.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

?@Configuration注解的使用：

/*
* WebConfiguration.java Spring配置类，相当于applicationContext.xml配置文件
* */
@ComponentScan("com.mvc.controller")
@EnableWebMvc
@Configuration
public class WebConfiguration implements WebMvcConfigurer {

    @Bean
    public SpringResourceTemplateResolver resourceTemplateResolver(){
        SpringResourceTemplateResolver resolver=new SpringResourceTemplateResolver();
        resolver.setSuffix(".html");
        resolver.setPrefix("/WEB-INF/");
        return  resolver;
    }


    @Bean
    public SpringTemplateEngine templateEngine(@Autowired ITemplateResolver templateResolver){
        SpringTemplateEngine engine= new SpringTemplateEngine();
        engine.setTemplateResolver(templateResolver);
        System.out.println("SpringTemplateEngine:>>" + engine);
        return engine;
    }

    @Bean
    public ThymeleafViewResolver viewResolver(@Autowired SpringTemplateEngine templateEngine){
        ThymeleafViewResolver viewResolver= new ThymeleafViewResolver();
        viewResolver.setOrder(1);
        viewResolver.setCharacterEncoding("UTF-8");
        viewResolver.setTemplateEngine(templateEngine);

        System.out.println("ThymeleafViewResolver:>>"+templateEngine);
        return viewResolver;
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    /*
    * 配置访问静态js、css、html
    * */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("dist/**").addResourceLocations("/WEB-INF/dist/");
        registry.addResourceHandler("plugins/**").addResourceLocations("/WEB-INF/plugins/");
        registry.addResourceHandler("pages/**").addResourceLocations("/WEB-INF/pages/");
        registry.addResourceHandler("/*.html").addResourceLocations("/WEB-INF/");
    }
}

@Configuration
public class RootConfiguration {
}

新建控制器：

@Controller
public class HomeController {

    @RequestMapping("/index")
    public ModelAndView Index(){
        return new ModelAndView("index");
    }
}

?前端访问:http://localhost:8080/index