春季开机大战中来自${catalina.home}的java静态资源

Question

在我的春季MVC项目中

<mvc:resources mapping="/resources/**" location="/WEB-INF/resources/, file:${catalina.home}/myresources/" />

配置为从多个位置提供静态资源。 然而，在春季

@Configuration
public class ResourceConfig implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(final ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/", "file:${catalina.home}/myresources/");
    }
}

没有按预期工作。请帮忙

Answer 1

    @Configuration
public class ResourceConfig implements WebMvcConfigurer {

    private static final Log LOG = LogFactory.getLog(ResourceConfig.class);

    @Override
    public void addResourceHandlers(final ResourceHandlerRegistry registry) {
        String catalinaHome;
        try {
            catalinaHome = System.getenv("CATALINA_HOME");
        } catch (Exception e) {
            LOG.error(e);
            catalinaHome = "";
        }
        registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/", "file:" + catalinaHome + "/myresources/");    
    }
}

Answer 2

Spring不会直接在字符串中读取此属性${Catalina.home}。但您可以通过以下方式使用@Value：

@Configuration
public class ResourceConfig implements 
WebMvcConfigurer {
    @Value("${catalina.home}" )
    private String catalinaHome;
    @Override
    public void addResourceHandlers(final ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/WEB-INF/resources/", "file:" + catalinaHome + "/myresources/");
    }
}