如何在Java中读取resources下的文件及资源路径

public class ResourceReader {
    public static void main(String[] args) {
        // 通过ClassLoader读取resources下的文件
        InputStream inputStream = ResourceReader.class.getClassLoader().getResourceAsStream("test.txt");
        if (inputStream != null) {
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
                String line;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

public class ResourceReader {
    public static void main(String[] args) {
        // 通过Class的getResourceAsStream方法读取resources下的文件
        InputStream inputStream = ResourceReader.class.getResourceAsStream("/test.txt");
        if (inputStream != null) {
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
                String line;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

public class ResourcePath {
    public static void main(String[] args) {
        // 获取resource文件的路径
        URL resourceUrl = ResourcePath.class.getClassLoader().getResource("test.txt");
        if (resourceUrl != null) {
            String resourcePath = resourceUrl.getPath();
            System.out.println(resourcePath);
        }
    }
}

public class ResourcePath {
    public static void main(String[] args) {
        // 获取resource文件的路径
        URL resourceUrl = ResourcePath.class.getResource("/test.txt");
        if (resourceUrl != null) {
            String resourcePath = resourceUrl.getPath();
            System.out.println(resourcePath);
        }
    }
}