Spring.Boot Web开发初始静态资源处理《课时九》-阿里云开发者社区

1 在新建的项目中 Ctrl+N搜索下面的类

要了解的目标信息

package org.springframework.boot.autoconfigure.web.servlet;
//部分代码省略
@AutoConfiguration(
    after = {DispatcherServletAutoConfiguration.class, TaskExecutionAutoConfiguration.class, ValidationAutoConfiguration.class}
@ConditionalOnWebApplication(
    type = Type.SERVLET
@ConditionalOnClass({Servlet.class, DispatcherServlet.class, WebMvcConfigurer.class})
@ConditionalOnMissingBean({WebMvcConfigurationSupport.class})
@AutoConfigureOrder(-2147483638)
public class WebMvcAutoConfiguration {

2 在进入上面的类后ctrl+r搜索 addResourceHandlers方法

如图所示了解资源增加在哪里

//551
//将源码赋值过来
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    //1什么是webjars
            if (!this.resourceProperties.isAddMappings()) {
                logger.debug("Default resource handling disabled");
            } else {
                this.addResourceHandler(registry, "/webjars/**", "classpath:/META-INF/resources/webjars/");
                this.addResourceHandler(registry, this.mvcProperties.getStaticPathPattern(), (registration) -> {
                    registration.addResourceLocations(this.resourceProperties.getStaticLocations());
                    if (this.servletContext != null) {
                        ServletContextResource resource = new ServletContextResource(this.servletContext, "/");
                        registration.addResourceLocations(new Resource[]{resource});
        }

什么是Webjars 在百度上搜索

打开官网 WebJars - Web Libraries in Jars

Jquery的依赖

复制依赖引入到 Pom.xml文件中

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
<!--        引用jquery的文件依赖-->
        <dependency>
            <groupId>org.webjars.npm</groupId>
            <artifactId>jquery</artifactId>
            <version>3.6.1</version>
        </dependency>
    </dependencies>

然后观察发现多了一个架包

如图所示

结论一:静态资源存放在在:

addResourceHandler(registry, "/webjars/**", "classpath:/META-INF/resources/webjars/");

静态资源还有第二种方式

  this.addResourceHandler(registry, this.mvcProperties.getStaticPathPattern(), (registration) -> {
                    registration.addResourceLocations(this.resourceProperties.getStaticLocations());
                    if (this.servletContext != null) {
                        ServletContextResource resource = new ServletContextResource(this.servletContext, "/");
                        registration.addResourceLocations(new Resource[]{resource});
                    }

this.addResourceHandler(registry, this.mvcProperties.getStaticPathPattern(), (registration) -> {}

点击上面红色标记跳转如图所示

静态资源的第二种方式

结论二:/**也可以存放静态资源找到下面的代码信息往下翻

@ConfigurationProperties("spring.web")
public class WebProperties {
    private Locale locale;
    private WebProperties.LocaleResolver localeResolver;
    private final WebProperties.Resources resources;
    public WebProperties() {
        this.localeResolver = WebProperties.LocaleResolver.ACCEPT_HEADER;
        this.resources = new WebProperties.Resources();
    }

private static final String[] CLASSPATH_RESOURCE_LOCATIONS = new String[]{"classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"};

如图所示的几个包可以存放静态资源

总结:今天说的是静态资源存放位置是依据SpringBoot源码中得来的.要想知道更深的角度必要是要读SpringBoot源码

1.在springboot,我们可以使用以下方式处理静态资源。

webjars 1ocalhost: 8080/webjars/

public, static, /**, resources

localhost : 8080/

2.优先级: resources>static>public

Spring.Boot Web 模板引擎和首页为什么默认的是index.html页面呀《课时十》_星辰镜的博客-CSDN博客