對映本地圖片

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

/**
 *對映本地圖片類，找到url對應的檔案,配置Spring MVC的一些特性，例如新增靜態資源對映
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * 新增靜態資源對映
     *
     * @param registry ResourceHandlerRegistry例項，用於配置靜態資源處理
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {

        // 與設定saveFile.setAvatar_url("http://localhost:8081/api/files" + fileUUID);一致，否則對映不到
        registry.addResourceHandler("/api/files/**")
                .addResourceLocations("file:G:/duxiang/files/");

        registry.addResourceHandler("/api/exercise-show/**")
                .addResourceLocations("file:G:/duxiang/exercise-show/");
    }
}