Spring Boot 读取 resources 目录下文件 about blog HOT 2 OPEN

    @SneakyThrows
    public static <T> Iterator<T> read(String resourceLocation, Function<String, T> mapper) {
        ClassPathResource classPathResource = new ClassPathResource(resourceLocation);
        byte[] read = FileCopyUtils.copyToByteArray(classPathResource.getInputStream());

        return Arrays.stream(new String(read).split("\n")).map(mapper).iterator();
    }

public class ResourceUtils {

    private ResourceUtils() {
        throw new IllegalStateException("Utility class");
    }

    @SneakyThrows
    public static <T> List<T> fileRead(String resourceLocation, Function<String, T> mapper) {
        if (resourceLocation == null) {
            return Collections.emptyList();
        }

        if (-1 != resourceLocation.compareToIgnoreCase("classpath:")) {
            resourceLocation = resourceLocation.replaceAll("(?i)classpath:", "");
        }

        ClassPathResource classPathResource = new ClassPathResource(resourceLocation);
        byte[] read = FileCopyUtils.copyToByteArray(classPathResource.getInputStream());

        return Arrays.stream(new String(read).split("\n"))
                .map(mapper).collect(Collectors.toList());
    }