java.util.Enumeration类的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中java.util.Enumeration类的一些代码示例，展示了Enumeration类的具体用法。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。Enumeration类的具体详情如下：
包路径：java.util.Enumeration
类名称：Enumeration

Enumeration介绍

[英]A legacy iteration interface.

New code should use Iterator instead. Iterator replaces the enumeration interface and adds a way to remove elements from a collection.

If you have an Enumeration and want a Collection, you can use Collections#list to get a List.

If you need an Enumeration for a legacy API and have a Collection, you can use Collections#enumeration.
[中]遗留迭代接口。
新代码应该使用迭代器。迭代器替换了枚举接口，并添加了从集合中删除元素的方法。
如果您有一个枚举并且想要一个集合，那么可以使用集合列表来获取列表。
如果您需要遗留API的枚举并拥有集合，则可以使用集合#枚举。

代码示例

代码示例来源：origin: alibaba/druid

private static void loadFilterConfig(Properties filterProperties, ClassLoader classLoader) throws IOException {
  if (classLoader == null) {
    return;
  }
  
  for (Enumeration<URL> e = classLoader.getResources("META-INF/druid-filter.properties"); e.hasMoreElements();) {
    URL url = e.nextElement();
    Properties property = new Properties();
    InputStream is = null;
    try {
      is = url.openStream();
      property.load(is);
    } finally {
      JdbcUtils.close(is);
    }
    filterProperties.putAll(property);
  }
}

代码示例来源：origin: spring-projects/spring-framework

private static HttpHeaders createDefaultHttpHeaders(HttpServletRequest request) {
  HttpHeaders headers = new HttpHeaders();
  for (Enumeration<?> names = request.getHeaderNames(); names.hasMoreElements(); ) {
    String name = (String) names.nextElement();
    for (Enumeration<?> values = request.getHeaders(name); values.hasMoreElements(); ) {
      headers.add(name, (String) values.nextElement());
    }
  }
  return headers;
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Copy the configured output {@link Properties}, if any, into the
 * {@link Transformer#setOutputProperty output property set} of the supplied
 * {@link Transformer}.
 * @param transformer the target transformer
 */
protected final void copyOutputProperties(Transformer transformer) {
  if (this.outputProperties != null) {
    Enumeration<?> en = this.outputProperties.propertyNames();
    while (en.hasMoreElements()) {
      String name = (String) en.nextElement();
      transformer.setOutputProperty(name, this.outputProperties.getProperty(name));
    }
  }
}

代码示例来源：origin: google/guava

@Override
protected void scanJarFile(ClassLoader classloader, JarFile file) {
 Enumeration<JarEntry> entries = file.entries();
 while (entries.hasMoreElements()) {
  JarEntry entry = entries.nextElement();
  if (entry.isDirectory() || entry.getName().equals(JarFile.MANIFEST_NAME)) {
   continue;
  }
  resources.get(classloader).add(entry.getName());
 }
}

代码示例来源：origin: netty/netty

Properties props = new Properties();
try {
  Enumeration<URL> resources = classLoader.getResources("META-INF/io.netty.versions.properties");
  while (resources.hasMoreElements()) {
    URL url = resources.nextElement();
    InputStream in = url.openStream();
    try {
      props.load(in);
    } finally {
      try {
        in.close();
      } catch (Exception ignore) {
for (Object o: props.keySet()) {
  String k = (String) o;

代码示例来源：origin: spring-projects/spring-framework

Properties props = new Properties();
while (urls.hasMoreElements()) {
  URL url = urls.nextElement();
  URLConnection con = url.openConnection();
  ResourceUtils.useCachesIfNecessary(con);
  InputStream is = con.getInputStream();
  try {
    if (resourceName.endsWith(XML_FILE_EXTENSION)) {
      props.loadFromXML(is);
      props.load(is);
    is.close();

代码示例来源：origin: eclipse-vertx/vert.x

protected String getCommandFromManifest() {
 try {
  Enumeration<URL> resources = RunCommand.class.getClassLoader().getResources("META-INF/MANIFEST.MF");
  while (resources.hasMoreElements()) {
   InputStream stream = resources.nextElement().openStream();
   Manifest manifest = new Manifest(stream);
   Attributes attributes = manifest.getMainAttributes();
   String mainClass = attributes.getValue("Main-Class");
   if (main.getClass().getName().equals(mainClass)) {
    String command = attributes.getValue("Main-Command");
    if (command != null) {
     stream.close();
     return command;
    }
   }
   stream.close();
  }
 } catch (IOException e) {
  throw new IllegalStateException(e.getMessage());
 }
 return null;
}

代码示例来源：origin: log4j/log4j

Hashtable filters = new Hashtable();
Enumeration e = props.keys();
String name = "";
while (e.hasMoreElements()) {
 String key = (String) e.nextElement();
 if (key.startsWith(filterPrefix)) {
  int dotIdx = key.indexOf('.', fIdx);
   name = key.substring(dotIdx+1);
   filterOpts.add(new NameValue(name, value));
while (g.hasMoreElements()) {
 String key = (String) g.nextElement();
 String clazz = props.getProperty(key);
 if (clazz != null) {
  LogLog.debug("Filter key: ["+key+"] class: ["+props.getProperty(key) +"] props: "+filters.get(key));
  Filter filter = (Filter) OptionConverter.instantiateByClassName(clazz, Filter.class, null);
  if (filter != null) {
   PropertySetter propSetter = new PropertySetter(filter);
   Vector v = (Vector)filters.get(key);
   Enumeration filterProps = v.elements();
   while (filterProps.hasMoreElements()) {
    NameValue kv = (NameValue)filterProps.nextElement();
    propSetter.setProperty(kv.key, kv.value);

代码示例来源：origin: apache/flink

jar = new JarFile(new File(jarFile.toURI()));
final List<JarEntry> containedJarFileEntries = new ArrayList<JarEntry>();
Enumeration<JarEntry> entries = jar.entries();
while (entries.hasMoreElements()) {
  JarEntry entry = entries.nextElement();
  String name = entry.getName();
    for (int i = 0; i < containedJarFileEntries.size(); i++) {
      final JarEntry entry = containedJarFileEntries.get(i);
      String name = entry.getName();
        throw new ProgramInvocationException(
          "An I/O error occurred while creating temporary file to extract nested library '" +
              entry.getName() + "'.", e);
        in = new BufferedInputStream(jar.getInputStream(entry));
        while ((numRead = in.read(buffer)) != -1) {
          out.write(buffer, 0, numRead);
          in.close();

代码示例来源：origin: git-commit-id/maven-git-commit-id-plugin

@Override
public Enumeration keys() {
 Enumeration keysEnum = super.keys();
 Vector<String> keyList = new Vector<>();
 while (keysEnum.hasMoreElements()) {
  keyList.add((String)keysEnum.nextElement());
 }
 Collections.sort(keyList);
 return keyList.elements();
}

代码示例来源：origin: spring-projects/spring-framework

@Override
public Map<String, String[]> getParameterMap() {
  Map<String, String[]> result = new LinkedHashMap<>();
  Enumeration<String> names = getParameterNames();
  while (names.hasMoreElements()) {
    String name = names.nextElement();
    result.put(name, getParameterValues(name));
  }
  return result;
}

代码示例来源：origin: alibaba/druid

public void setColumnMargin(int margin) {
  this.margin = margin;
  Enumeration<Object> enumeration = vector.elements();
  while (enumeration.hasMoreElements()) {
    Object obj = enumeration.nextElement();
    if (obj instanceof ColumnGroup) {
      ((ColumnGroup) obj).setColumnMargin(margin);
    }
  }
}

代码示例来源：origin: androidannotations/androidannotations

JarFile jar = null;
try {
  jarURL = new URL("file:/" + file.getCanonicalPath());
  jarURL = new URL("jar:" + jarURL.toExternalForm() + "!/");
  JarURLConnection conn = (JarURLConnection) jarURL.openConnection();
  jar = conn.getJarFile();
Enumeration<JarEntry> e = jar.entries();
while (e.hasMoreElements()) {
  JarEntry entry = e.nextElement();
  if (entry.isDirectory()) {
    if (entry.getName().toUpperCase().equals("META-INF/")) {
      continue;
      map.put(new URL(jarURL.toExternalForm() + entry.getName()), packageNameFor(entry));
    } catch (MalformedURLException murl) {

代码示例来源：origin: skylot/jadx

public static String getVersion() {
    try {
      ClassLoader classLoader = Jadx.class.getClassLoader();
      if (classLoader != null) {
        Enumeration<URL> resources = classLoader.getResources("META-INF/MANIFEST.MF");
        while (resources.hasMoreElements()) {
          Manifest manifest = new Manifest(resources.nextElement().openStream());
          String ver = manifest.getMainAttributes().getValue("jadx-version");
          if (ver != null) {
            return ver;
          }
        }
      }
    } catch (Exception e) {
      LOG.error("Can't get manifest file", e);
    }
    return "dev";
  }
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Set the mappings of bean keys to a comma-separated list of method names.
 * The property key should match the bean key and the property value should match
 * the list of method names. When searching for method names for a bean, Spring
 * will check these mappings first.
 * @param mappings the mappings of bean keys to method names
 */
public void setMethodMappings(Properties mappings) {
  this.methodMappings = new HashMap<>();
  for (Enumeration<?> en = mappings.keys(); en.hasMoreElements();) {
    String beanKey = (String) en.nextElement();
    String[] methodNames = StringUtils.commaDelimitedListToStringArray(mappings.getProperty(beanKey));
    this.methodMappings.put(beanKey, new HashSet<>(Arrays.asList(methodNames)));
  }
}

代码示例来源：origin: apache/incubator-dubbo

@Override
public void handle(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException {
  String uri = request.getRequestURI();
  HessianSkeleton skeleton = skeletonMap.get(uri);
  if (!request.getMethod().equalsIgnoreCase("POST")) {
    response.setStatus(500);
  } else {
    RpcContext.getContext().setRemoteAddress(request.getRemoteAddr(), request.getRemotePort());
    Enumeration<String> enumeration = request.getHeaderNames();
    while (enumeration.hasMoreElements()) {
      String key = enumeration.nextElement();
      if (key.startsWith(Constants.DEFAULT_EXCHANGER)) {
        RpcContext.getContext().setAttachment(key.substring(Constants.DEFAULT_EXCHANGER.length()),
            request.getHeader(key));
      }
    }
    try {
      skeleton.invoke(request.getInputStream(), response.getOutputStream());
    } catch (Throwable e) {
      throw new ServletException(e);
    }
  }
}

代码示例来源：origin: lets-blade/blade

List<FileMeta> getResourceListing(URL dirURL, String path) throws IOException {
  List<FileMeta> listFiles = new ArrayList<>();
  if (null == CACHE_JAR_FILE) {
    //strip out only the JAR file
    String jarPath = dirURL.getPath().substring(5, dirURL.getPath().indexOf("!"));
    CACHE_JAR_FILE = new JarFile(URLDecoder.decode(jarPath, "UTF-8"));
  }
  Enumeration<JarEntry> entries = CACHE_JAR_FILE.entries();
  while (entries.hasMoreElements()) {
    JarEntry jarEntry = entries.nextElement();
    String   name     = jarEntry.getName();
    if (!name.startsWith(path) || name.equals(path + "/")) {
      continue;
    }
    FileMeta fileMeta = new FileMeta();
    fileMeta.name = name.substring(path.length() + 1);
    fileMeta.isDirectory = jarEntry.isDirectory();
    if (!fileMeta.isDirectory) {
      fileMeta.length = jarEntry.getSize();
    }
    listFiles.add(fileMeta);
  }
  return listFiles;
}

代码示例来源：origin: spring-projects/spring-framework

throws IOException {
URLConnection con = rootDirURL.openConnection();
JarFile jarFile;
String jarFileUrl;
  ResourceUtils.useCachesIfNecessary(jarCon);
  jarFile = jarCon.getJarFile();
  jarFileUrl = jarCon.getJarFileURL().toExternalForm();
  JarEntry jarEntry = jarCon.getJarEntry();
  rootEntryPath = (jarEntry != null ? jarEntry.getName() : "");
  closeJarFile = !jarCon.getUseCaches();
  String urlFile = rootDirURL.getFile();
  try {
    int separatorIndex = urlFile.indexOf(ResourceUtils.WAR_URL_SEPARATOR);
      jarFile = new JarFile(urlFile);
      jarFileUrl = urlFile;
      rootEntryPath = "";
  for (Enumeration<JarEntry> entries = jarFile.entries(); entries.hasMoreElements();) {
    JarEntry entry = entries.nextElement();
    String entryPath = entry.getName();
    if (entryPath.startsWith(rootEntryPath)) {
      String relativePath = entryPath.substring(rootEntryPath.length());
    jarFile.close();

代码示例来源：origin: loklak/loklak_server

private static void extractContents() {
  // Check if we're running inside a JAR file
  if(!LoklakServer.class.getResource("LoklakServer.class").getPath().startsWith("file:"))
    return;
  try {
    JarFile jar =
        new JarFile(LoklakServer.class.getProtectionDomain().getCodeSource().getLocation().getPath());
    Enumeration entries = jar.entries();
    while (entries.hasMoreElements()) {
      JarEntry file = (JarEntry) entries.nextElement();
      for (String s : FOLDER_TO_EXTRACT) {
        if (file.getName().startsWith(s + File.separator)) {
          extract(jar, file);
          continue;
        }
      }
    }
  } catch (IOException e) {
    DAO.severe("An exception has occurred while extracting contents from JAR File", e);
    DAO.log("Exiting due to fatal error ...");
    System.exit(1);
  }
}

代码示例来源：origin: redisson/redisson

/**
 * This method is periodically invoked so that memory
 * footprint will be minimized.
 */
void compress() {
  if (compressCount++ > COMPRESS_THRESHOLD) {
    compressCount = 0;
    Enumeration e = classes.elements();
    while (e.hasMoreElements())
      ((CtClass)e.nextElement()).compress();
  }
}

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