本文整理了Java中java.nio.file.Files.exists()方法的一些代码示例，展示了Files.exists()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Files.exists()方法的具体详情如下：
包路径：java.nio.file.Files
类名称：Files
方法名：exists

Files.exists介绍

暂无

代码示例

代码示例来源：origin: springside/springside4

public static boolean isDirExists(Path dirPath) {
  return dirPath != null && Files.exists(dirPath) && Files.isDirectory(dirPath);
}

代码示例来源：origin: apache/incubator-druid

@JsonCreator
public LocalLoadSpec(
  @JacksonInject LocalDataSegmentPuller puller,
  @JsonProperty(value = "path", required = true) final String path
)
{
 Preconditions.checkNotNull(path);
 this.path = Paths.get(path);
 Preconditions.checkArgument(Files.exists(Paths.get(path)), "[%s] does not exist", path);
 this.puller = puller;
}

代码示例来源：origin: apache/ignite

/**
 * Get Ignite Hadoop config directory.
 *
 * @param igniteHome Ignite home.
 * @return Ignite Hadoop config directory.
 */
private static File igniteHadoopConfig(String igniteHome) {
  Path path = Paths.get(igniteHome, "modules", "hadoop", "config");
  if (!Files.exists(path))
    path = Paths.get(igniteHome, "config", "hadoop");
  if (Files.exists(path))
    return path.toFile();
  else
    return new File(igniteHome, "docs");
}

代码示例来源：origin: apache/storm

private void forEachTopologyDistDir(ConsumePathAndId consumer) throws IOException {
  Path stormCodeRoot = Paths.get(ConfigUtils.supervisorStormDistRoot(conf));
  if (Files.exists(stormCodeRoot) && Files.isDirectory(stormCodeRoot)) {
    try (DirectoryStream<Path> children = Files.newDirectoryStream(stormCodeRoot)) {
      for (Path child : children) {
        if (Files.isDirectory(child)) {
          String topologyId = child.getFileName().toString();
          consumer.accept(child, topologyId);
        }
      }
    }
  }
}

代码示例来源：origin: testcontainers/testcontainers-java

private String determineDockerConfigPath() {
  String dockerConfigEnv = System.getenv(DOCKER_CONFIG_ENV);
  String dockerConfigProperty = System.getProperty(DOCKER_CONFIG_PROPERTY);
  Path dockerConfig = Paths.get(System.getProperty("user.home"), ".docker", "config.json");
  if (dockerConfigEnv != null && !dockerConfigEnv.trim().isEmpty() && Files.exists(Paths.get(dockerConfigEnv))) {
    return dockerConfigEnv;
  } else if (dockerConfigProperty != null && !dockerConfigProperty.trim().isEmpty() && Files.exists(Paths.get(dockerConfigProperty))) {
    return dockerConfigProperty;
  } else if (Files.exists(dockerConfig)) {
    return dockerConfig.toString();
  } else {
    return null;
  }
}

代码示例来源：origin: pxb1988/dex2jar

@Override
  public void visitFile(Path file, String relative) throws IOException {
    Path out = outRoot.resolve(relative);
    if (Files.exists(out)) {
      System.err.println("skip " + relative + " in " + stub);
    } else {
      createParentDirectories(out);
      Files.copy(file, out);
    }
  }
});

代码示例来源：origin: apache/storm

static Collection<String> getLocalizedUsers(Path localBaseDir) throws IOException {
  Path userCacheDir = getUserCacheDir(localBaseDir);
  if (!Files.exists(userCacheDir)) {
    return Collections.emptyList();
  }
  return Files.list(userCacheDir).map((p) -> p.getFileName().toString()).collect(Collectors.toList());
}

代码示例来源：origin: spotify/helios

private PersistentAtomicReference(final Path filename,
                 final JavaType javaType,
                 final Supplier<? extends T> initialValue)
  throws IOException, InterruptedException {
 try {
  this.filename = filename.toAbsolutePath();
  this.tempfilename = filename.getFileSystem().getPath(this.filename.toString() + ".tmp");
  if (Files.exists(filename)) {
   final byte[] bytes = Files.readAllBytes(filename);
   if (bytes.length > 0) {
    value = Json.read(bytes, javaType);
   } else {
    value = initialValue.get();
   }
  } else {
   value = initialValue.get();
  }
 } catch (InterruptedIOException | ClosedByInterruptException e) {
  throw new InterruptedException(e.getMessage());
 }
}

代码示例来源：origin: org.codehaus.plexus/plexus-utils

public static File createSymbolicLink( File symlink, File target )
  throws IOException
{
  Path link = symlink.toPath();
  if ( Files.exists( link, LinkOption.NOFOLLOW_LINKS ) )
  {
    Files.delete( link );
  }
  link = Files.createSymbolicLink( link, target.toPath() );
  return link.toFile();
}

代码示例来源：origin: debezium/debezium

@Test
  public void shouldRemoveDirectory() throws Exception {
    Path path = Paths.get(Testing.Files.dataDir(), "test-dir");
    assertThat(path.toFile().mkdirs()).isTrue();

    Path file = path.resolve("file.txt");
    assertThat(file.toFile().createNewFile()).isTrue();

    Testing.Files.delete(path);
    assertThat(java.nio.file.Files.exists(path)).isFalse();
  }
}

代码示例来源：origin: btraceio/btrace

private static void appendToBootClassPath(Path libFolder) {
  Path bootLibs = libFolder.resolve("boot");
  if (Files.exists(bootLibs)) {
    for (File f : bootLibs.toFile().listFiles()) {
      if (f.getName().toLowerCase().endsWith(".jar")) {
        try {
          if (isDebug()) {
            debugPrint("Adding " + f.getAbsolutePath() + " to bootstrap classpath");
          }
          inst.appendToBootstrapClassLoaderSearch(new JarFile(f));
        } catch (IOException e) {
        }
      }
    }
  }
}

代码示例来源：origin: apache/ignite

/**
 * Answers if the given path denotes existing directory.
 *
 * @param path The directory path.
 * @return {@code True} if the given path denotes an existing directory.
 */
public static boolean exists(String path) {
  if (F.isEmpty(path))
    return false;
  Path p = Paths.get(path);
  return Files.exists(p) && Files.isDirectory(p) && Files.isReadable(p);
}

代码示例来源：origin: real-logic/aeron

@Test
public void shouldNotThrowWhenOldRecordingLogsAreDeleted() throws IOException
{
  createSegmentFile(recordingThreeId);
  final Path segmentFilePath = Paths.get(segmentFileName(recordingThreeId, 0));
  final boolean segmentFileExists = Files.exists(archiveDir.toPath().resolve(segmentFilePath));
  assumeThat(segmentFileExists, is(true));
  final Catalog catalog = new Catalog(archiveDir, null, 0, MAX_ENTRIES, clock);
  catalog.close();
}

代码示例来源：origin: apache/storm

@VisibleForTesting
static long localVersionOfBlob(Path versionFile) {
  long currentVersion = -1;
  if (Files.exists(versionFile) && !(Files.isDirectory(versionFile))) {
    try (BufferedReader br = new BufferedReader(new FileReader(versionFile.toFile()))) {
      String line = br.readLine();
      currentVersion = Long.parseLong(line);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
  return currentVersion;
}

代码示例来源：origin: GoogleContainerTools/jib

private JavaContainerBuilder addDirectory(
   Path directory, AbsoluteUnixPath destination, LayerType layerType, Predicate<Path> pathFilter)
   throws IOException {
  if (!Files.exists(directory)) {
   throw new NoSuchFileException(directory.toString());
  }
  if (!Files.isDirectory(directory)) {
   throw new NotDirectoryException(directory.toString());
  }
  layerConfigurationsBuilder.addDirectoryContents(layerType, directory, pathFilter, destination);
  classpath.add(destination.toString());
  return this;
 }
}

代码示例来源：origin: dadoonet/fscrawler

@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
  Path targetPath = destination.resolve(rootPath.relativize(dir).toString());
  if (!Files.exists(targetPath)) {
    Files.createDirectory(targetPath);
  }
  return FileVisitResult.CONTINUE;
}

代码示例来源：origin: neo4j/neo4j

private void validatePath( Path path ) throws FileSystemException
{
  if ( exists( path ) )
  {
    throw new FileAlreadyExistsException( path.toString() );
  }
  checkWritableDirectory( path.getParent() );
}

代码示例来源：origin: pmd/pmd

public RuleDocGenerator(FileWriter writer, Path root) {
  this.writer = Objects.requireNonNull(writer, "A file writer must be provided");
  this.root = Objects.requireNonNull(root, "Root directory must be provided");
  Path docsDir = root.resolve("docs");
  if (!Files.exists(docsDir) || !Files.isDirectory(docsDir)) {
    throw new IllegalArgumentException("Couldn't find \"docs\" subdirectory");
  }
}

代码示例来源：origin: line/armeria

FileSystemHttpVfs(Path rootDir) {
  this.rootDir = requireNonNull(rootDir, "rootDir").toAbsolutePath();
  if (!Files.exists(this.rootDir) || !Files.isDirectory(this.rootDir)) {
    throw new IllegalArgumentException("rootDir: " + rootDir + " (not a directory");
  }
}

代码示例来源：origin: apache/ignite

/**
 * Copy file to working directory.
 *
 * @param filePath File path.
 * @return File name.
 * @throws IOException If coping failed.
 */
String copyToWorkDir(String filePath) throws IOException {
  Path srcFile = Paths.get(filePath);
  if (Files.exists(srcFile)) {
    checkDownloadFolder();
    Path newDir = Paths.get(downloadFolder);
    Path fileName = srcFile.getFileName();
    Files.copy(srcFile, newDir.resolve(fileName), StandardCopyOption.REPLACE_EXISTING);
    return fileName.toString();
  }
  return null;
}