无法加载gradle项目中的资源

my-project/
├── src/
│   ├── main/
│   │   ├── java/
│   │   └── resources/
│   │       └── application.properties
│   └── test/
│       ├── java/
│       └── resources/

sourceSets {
    main {
        resources {
            srcDirs "src/main/resources"
        }
    }
}

chmod -R a+r src/main/resources

my-project/
├── src/
│   ├── main/
│   │   ├── java/
│   │   │   └── com/example/Main.java
│   │   └── resources/
│   │       └── config.properties
│   └── build.gradle

package com.example;

import java.io.InputStream;
import java.util.Properties;

public class Main {
    public static void main(String[] args) {
        Properties prop = new Properties();
        try (InputStream input = Main.class.getClassLoader().getResourceAsStream("config.properties")) {
            if (input == null) {
                System.out.println("Sorry, unable to find config.properties");
                return;
            }
            prop.load(input);
            System.out.println(prop.getProperty("example.key"));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

plugins {
    id 'java'
}

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'junit:junit:4.13.2'
}

sourceSets {
    main {
        resources {
            srcDirs "src/main/resources"
        }
    }
}