在下面，中从载文您将找到在WAR和JAR中加载文件的类路解决方案。
资源加载器使用Java，径加件您可以使用当前线程的中从载文classLoader并尝试加载文件，但是类路Spring Framework为您提供了更为优雅的解决方案，例如ResourceLoader。服务器租用径加件
您只需要自动连接ResourceLoader，中从载文然后调用getResource(„somePath“)方法即可。类路
在Spring Boot（WAR）中从资源目录/类路径加载文件的径加件示例在以下示例中，我们从类路径中加载名为GeoLite2-Country.mmdb的中从载文文件作为资源，然后将其作为File对象检索。类路
@Service("geolocationservice") public class GeoLocationServiceImpl implements GeoLocationService { private static final Logger LOGGER = LoggerFactory.getLogger(GeoLocationServiceImpl.class); private static DatabaseReader reader = null; private ResourceLoader resourceLoader; @Autowired public GeoLocationServiceImpl(ResourceLoader resourceLoader) { this.resourceLoader = resourceLoader; } @PostConstruct public void init() { try { LOGGER.info("GeoLocationServiceImpl: Trying to load GeoLite2-Country database..."); Resource resource = resourceLoader.getResource("classpath:GeoLite2-Country.mmdb"); File dbAsFile = resource.getFile(); // Initialize the reader reader = new DatabaseReader .Builder(dbAsFile) .fileMode(Reader.FileMode.MEMORY) .build(); LOGGER.info("GeoLocationServiceImpl: Database was loaded successfully."); } catch (IOException | NullPointerException e) { LOGGER.error("Database reader cound not be initialized. ",径加件 e); } } @PreDestroy public void preDestroy() { if (reader != null) { try { reader.close(); } catch (IOException e) { LOGGER.error("Failed to close the reader."); } } } } 在Spring Boot（JAR）中从资源目录/类路径加载文件的示例如果您想从Spring Boot JAR中的站群服务器 classpath加载文件，则必须使用该resource.getInputStream()方法将其作为InputStream检索。中从载文如果尝试使用resource.getFile()该方法，类路则会收到错误消息，径加件因为Spring尝试访问文件系统路径，但无法访问JAR中的路径。
@Service("geolocationservice") public class GeoLocationServiceImpl implements GeoLocationService { private static final Logger LOGGER = LoggerFactory.getLogger(GeoLocationServiceImpl.class); private static DatabaseReader reader = null; private ResourceLoader resourceLoader; @Inject public GeoLocationServiceImpl(ResourceLoader resourceLoader) { this.resourceLoader = resourceLoader; } @PostConstruct public void init() { try { LOGGER.info("GeoLocationServiceImpl: Trying to load GeoLite2-Country database..."); Resource resource = resourceLoader.getResource("classpath:GeoLite2-Country.mmdb"); InputStream dbAsStream = resource.getInputStream(); // <-- this is the difference // Initialize the reader reader = new DatabaseReader .Builder(dbAsStream) .fileMode(Reader.FileMode.MEMORY) .build(); LOGGER.info("GeoLocationServiceImpl: Database was loaded successfully."); } catch (IOException | NullPointerException e) { LOGGER.error("Database reader cound not be initialized. ", e); } } @PreDestroy public void preDestroy() { if (reader != null) { try { reader.close(); } catch (IOException e) { LOGGER.error("Failed to close the reader."); } } } }