springboot项目如何将本地资源路径映射成url路径

如何实现在项目中通过url路径访问本地磁盘的资源，将本地磁盘路径映射成虚拟路径

• 方式一：自定义类实现WebMvcConfigurer接口，重写它的addResourceHandlers(ResourceHandlerRegistry registry)方法。

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class FilePath implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
//   registry.addResourceHandler("虚拟路径").addResourceLocations("file:本地资源路径");
        registry.addResourceHandler("/image/**").addResourceLocations("file:D:/upload/");
    }
}

• 方式二：跟方式一差不多，自定义类继承WebMvcConfigurerAdapter类，重写它的addResourceHandlers(ResourceHandlerRegistry registry)方法。但已经过时不推荐使用。

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class FilePath2 extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //   registry.addResourceHandler("虚拟路径").addResourceLocations("file:本地资源路径");
        registry.addResourceHandler("/image/**").addResourceLocations("file:D:/upload/");
    }
}

• 方式三：在application.yml的配置文件进行配置

spring:
  mvc:
    static-path-pattern: '/image/**'
  resources:
    static-locations: 'file:D:/upload/'

总结：然后启动项目，可以通过http://localhost:8080/image/s.jpg，访问到本地磁盘的D:/upload/s.jpg文件。

如图：