如何从外部项目目录读取资源文件？

Question

Below code works fine if file location is resources folder but when file location is outside the project directory like(c:\file.json) it fails. How can we load file from outside project directory.

    @Bean
    public UserInfo readFile() {
        String fileName="prop.json";
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        File file = new File(classLoader.getResource(fileName).getFile());
        try {
             UserInfo info= new ObjectMapper(new JsonFactory()).readValue(file, UserInfo.class);
        } catch (Exception e) {
            
        }
        return info;
    }

Answer 1

You should create a Configuration class that implements WebMvcConfigurer and override the addResourceHadndler Method to add new resource to spring context.

@Configuration
@EnableWebMvc
public class MvcConfig implements WebMvcConfigurer{

    @Override
    public  void addResourceHandlers(ResourceHandlerRegistry registry) {
        
        // register you resource here
    }
    
}