Spring4 Spring MVC实战（三）——Spring MVC不通过xml配置访问HMTL和其他静态资源

雨点打透心脏的1/2处 2022-07-16 07:09 48阅读 0赞

先看一下xml配置的，很多博客写出来都差不多，但是又不详细。  
直接看一下老外的回答，[How to handle static content in Spring MVC?][How to handle static content in Spring MVC]  
  
国内的博客里面一般就这样写。

<servlet>  
        <servlet-name>springMVC</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <load-on-startup>1</load-on-startup>  
        </servlet>  
      
        <servlet-mapping>  
            <servlet-name>springMVC</servlet-name>  
            <url-pattern>/</url-pattern>  
        </servlet-mapping>

就写出一块，其实我们可以写的再详细点，贴个完整的路径和配置出来。

WebContent/WEB-INF/web.xml:

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
             http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    
    
     <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
     </servlet>
    
    
     <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
     </servlet-mapping>
    </web-app>

WebContent/WEB-INF/springmvc-servlet.xml:

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
     xmlns:mvc="http://www.springframework.org/schema/mvc"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
     http://www.springframework.org/schema/mvc
     http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    
    
        
     <context:component-scan base-package="springmvc.web" />
    
    
        
     <mvc:resources mapping="/resources/**" location="/resources/" />
    
    
        
     <bean      class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
     <bean
    class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
     </bean>
    
    
        
     <bean id="viewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="viewClass"
       value="org.springframework.web.servlet.view.JstlView" />
      <property name="prefix" value="/WEB-INF/jsp/" />
      <property name="suffix" value=".jsp" />
     </bean>
    
    
    </beans>

在[Spring MVC实战（一）——读《Spring in action》搭建最简单的MVC][Spring MVC_Spring in action_MVC]中继承AbstractAnnotationConfigDispatcherServletInitializer的类自动的配置了DispatcherServlet和  
spring的应用上下文。所以我是没在web.xml中配置任何东西的。  
  
  
但是我又不想在xml配置之后才能访问到静态资源和HTML，找来找去没有我想要的，那怎么办，还是看文档。http://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html\#mvc-config-enable  
思路就是找到要搜索的关键词，static resource。  
  
  
看到了文档中的HTTP caching support for static resources

@Configuration
    @EnableWebMvc
    public class WebConfig extends WebMvcConfigurerAdapter {
    
    
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
            registry.addResourceHandler("/resources/**")
                    .addResourceLocations("/public-resources/")
                    .setCacheControl(CacheControl.maxAge(1, TimeUnit.HOURS).cachePublic());
        }
    
    
    }
    And in XML:
    
    
    <mvc:resources mapping="/resources/**" location="/public-resources/">
        <mvc:cache-control max-age="3600" cache-public="true"/>
    </mvc:resources>

由于CacheControl是4.2版本之后才有的，我当前是4.1版本，所以去除setCacheControl方法。  
现在的整个WebConfig.java

import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.ViewResolver;
    import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    import org.springframework.web.servlet.view.InternalResourceViewResolver;
    
    
    @Configuration
    @EnableWebMvc
    @ComponentScan("spittr.web")
    public class WebConfig extends WebMvcConfigurerAdapter {
    
    
      @Bean
      public ViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
      }
      
      @Override
      public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
      }
      
      @Override
      public void addResourceHandlers(ResourceHandlerRegistry registry) {
    	  registry.addResourceHandler("/static/**")
          .addResourceLocations("/static/");
      }
    }

将test.html 置于WebContent/WEB-INF/static目录  
此后再访问http://localhost:8080/projectname/static/test.html即可访问，而无需在web.xml配置任何的东西。

[How to handle static content in Spring MVC]: http://stackoverflow.com/questions/1483063/how-to-handle-static-content-in-spring-mvc
[Spring MVC_Spring in action_MVC]: http://blog.csdn.net/iaiti/article/details/52423166