java.net.URLConnection.setUseCaches()方法的使用及代码示例

x33g5p2x  于2022-01-31 转载在 其他  
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本文整理了Java中java.net.URLConnection.setUseCaches()方法的一些代码示例，展示了URLConnection.setUseCaches()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。URLConnection.setUseCaches()方法的具体详情如下：
包路径：java.net.URLConnection
类名称：URLConnection
方法名：setUseCaches

URLConnection.setUseCaches介绍

[英]Sets the flag indicating whether this connection allows to use caches or not. This method can only be called prior to the connection establishment.
[中]设置指示此连接是否允许使用缓存的标志。只能在建立连接之前调用此方法。

代码示例

代码示例来源：origin: stackoverflow.com

  1. HttpURLConnection httpUrlConnection = null;
  2. URL url = new URL("http://example.com/server.cgi");
  3. httpUrlConnection = (HttpURLConnection) url.openConnection();
  4. httpUrlConnection.setUseCaches(false);
  5. httpUrlConnection.setDoOutput(true);
  7. httpUrlConnection.setRequestMethod("POST");
  8. httpUrlConnection.setRequestProperty("Connection", "Keep-Alive");
  9. httpUrlConnection.setRequestProperty("Cache-Control", "no-cache");
  10. httpUrlConnection.setRequestProperty(
  11.   "Content-Type", "multipart/form-data;boundary=" + this.boundary);

代码示例来源：origin: log4j/log4j

  1. public Document parse(final DocumentBuilder parser) throws SAXException, IOException {
  2.   URLConnection uConn = url.openConnection();
  3.   uConn.setUseCaches(false);
  4.   InputStream stream = uConn.getInputStream();
  5.   try {
  6.    InputSource src = new InputSource(stream);
  7.    src.setSystemId(url.toString());
  8.    return parser.parse(src);
  9.   } finally {
  10.    stream.close();
  11.   }
  12. }
  13. public String toString() {

代码示例来源：origin: stackoverflow.com

  1. URL url = new URL(strUrl);
  2. URLConnection connection = url.openConnection();
  3. connection.setUseCaches(true);
  4. Object response = connection.getContent();
  5. if (response instanceof Bitmap) {
  6.  Bitmap bitmap = (Bitmap)response;
  7. }

代码示例来源：origin: org.codehaus.groovy/groovy

  1. final URLConnection connection = url.openConnection();
  2. if (parameters != null) {
  3.   if (parameters.containsKey("connectTimeout")) {
  4.     connection.setUseCaches(DefaultGroovyMethods.asType(parameters.get("useCaches"), Boolean.class));
  5.     Map<String, CharSequence> properties = (Map<String, CharSequence>) parameters.get("requestProperties");
  6.     for (Map.Entry<String, CharSequence> entry : properties.entrySet()) {
  7.       connection.setRequestProperty(entry.getKey(), entry.getValue().toString());
  8. return connection.getInputStream();

代码示例来源：origin: org.freemarker/freemarker

  1. /**
  2.  * @param useCaches {@code null} if this aspect wasn't set in the parent {@link TemplateLoader}.
  3.  */
  4. URLTemplateSource(URL url, Boolean useCaches) throws IOException {
  5.   this.url = url;
  6.   this.conn = url.openConnection();
  7.   this.useCaches = useCaches;
  8.   if (useCaches != null) {
  9.     conn.setUseCaches(useCaches.booleanValue());
  10.   }
  11. }

代码示例来源：origin: javamelody/javamelody

  1. /**
  2.  * Ouvre la connection http.
  3.  * @return Object
  4.  * @throws IOException   Exception de communication
  5.  */
  6. private URLConnection openConnection() throws IOException {
  7.   final URLConnection connection = url.openConnection();
  8.   connection.setUseCaches(false);
  9.   if (CONNECTION_TIMEOUT > 0) {
  10.     connection.setConnectTimeout(CONNECTION_TIMEOUT);
  11.   }
  12.   if (READ_TIMEOUT > 0) {
  13.     connection.setReadTimeout(READ_TIMEOUT);
  14.   }
  15.   // grâce à cette propriété, l'application retournera un flux compressé si la taille
  16.   // dépasse x Ko
  17.   connection.setRequestProperty("Accept-Encoding", "gzip");
  18.   if (headers != null) {
  19.     for (final Map.Entry<String, String> entry : headers.entrySet()) {
  20.       connection.setRequestProperty(entry.getKey(), entry.getValue());
  21.     }
  22.   }
  23.   if (url.getUserInfo() != null) {
  24.     final String authorization = Base64Coder.encodeString(url.getUserInfo());
  25.     connection.setRequestProperty("Authorization", "Basic " + authorization);
  26.   }
  27.   return connection;
  28. }

代码示例来源：origin: cSploit/android

  1. protected void writeCall(String methodName, Object[] args) throws IOException {
  2.  huc = u.openConnection();
  3.  huc.setDoOutput(true);
  4.  huc.setDoInput(true);
  5.  huc.setUseCaches(false);
  6.  huc.setRequestProperty("Content-Type", "binary/message-pack");
  7.  huc.setReadTimeout(0);
  8.  OutputStream os = huc.getOutputStream();
  9.  Packer pk = msgpack.createPacker(os);
  10.  pk.writeArrayBegin(args.length+1);
  11.  pk.write(methodName);
  12.  for (Object arg : args)
  13.   pk.write(arg);
  14.  pk.writeArrayEnd();
  15.  pk.close();
  16.  os.close();
  17. }

代码示例来源：origin: stackoverflow.com

  1. System.setProperty("http.keepAlive", "false");
  2. HttpURLConnection conn = (HttpURLConnection) mURL.openConnection();
  3. conn.setUseCaches(false); 
  4. conn.setRequestProperty("User-Agent", useragent);
  5. conn.setConnectTimeout(30000);
  6. conn.setDoOutput(true); 
  7. conn.setDoInput(true); 
  8. consumer.sign(conn);
  10. conn.connect();
  12. InputSource is = new InputSource(conn.getInputStream());

代码示例来源：origin: stackoverflow.com

  1. String urlParameters  = "param1=a&param2=b&param3=c";
  2. byte[] postData       = urlParameters.getBytes( StandardCharsets.UTF_8 );
  3. int    postDataLength = postData.length;
  4. String request        = "http://example.com/index.php";
  5. URL    url            = new URL( request );
  6. HttpURLConnection conn= (HttpURLConnection) url.openConnection();           
  7. conn.setDoOutput( true );
  8. conn.setInstanceFollowRedirects( false );
  9. conn.setRequestMethod( "POST" );
  10. conn.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded"); 
  11. conn.setRequestProperty( "charset", "utf-8");
  12. conn.setRequestProperty( "Content-Length", Integer.toString( postDataLength ));
  13. conn.setUseCaches( false );
  14. try( DataOutputStream wr = new DataOutputStream( conn.getOutputStream())) {
  15.   wr.write( postData );
  16. }

代码示例来源：origin: redisson/redisson

  1. /**
  2.  * Opens a resource of the specified name for reading. Controls caching,
  3.  * that is important when the same jar is reloaded using custom classloader.
  4.  */
  5. public static InputStream getResourceAsStream(String resourceName, ClassLoader callingClass, boolean useCache) throws IOException {
  6.   URL url = getResourceUrl(resourceName, callingClass);
  7.   if (url != null) {
  8.     URLConnection urlConnection = url.openConnection();
  9.     urlConnection.setUseCaches(useCache);
  10.     return urlConnection.getInputStream();
  11.   }
  12.   return null;
  13. }

代码示例来源：origin: stackoverflow.com

  1. String addr = "http://172.26.41.18:8080/domain/list";
  2. URL url = new URL(addr);
  3. HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
  4. httpCon.setUseCaches(false);
  5. httpCon.setAllowUserInteraction(false);
  6. httpCon.addRequestProperty("Authorization", "Basic YWRtaW4fYFgjkl5463");
  7. System.out.println(httpCon.getResponseCode());
  8. System.out.println(httpCon.getResponseMessage());

代码示例来源：origin: ronmamo/reflections

  1. public Dir createDir(URL url) throws Exception {
  2.     try {
  3.       URLConnection urlConnection = url.openConnection();
  4.       if (urlConnection instanceof JarURLConnection) {
  5.         urlConnection.setUseCaches(false);
  6.         return new ZipDir(((JarURLConnection) urlConnection).getJarFile());
  7.       }
  8.     } catch (Throwable e) { /*fallback*/ }
  9.     java.io.File file = getFile(url);
  10.     if (file != null) {
  11.       return new ZipDir(new JarFile(file));
  12.     }
  13.     return null;
  14.   }
  15. },

代码示例来源：origin: openmrs/openmrs-core

  1. /**
  2.  * Downloads the contents of a URL and copies them to a string (Borrowed from oreilly)
  3.  *
  4.  * @param url
  5.  * @return InputStream of contents
  6.  * @should return a valid input stream for old module urls
  7.  */
  8. public static InputStream getURLStream(URL url) {
  9.   InputStream in = null;
  10.   try {
  11.     URLConnection uc = url.openConnection();
  12.     uc.setDefaultUseCaches(false);
  13.     uc.setUseCaches(false);
  14.     uc.setRequestProperty("Cache-Control", "max-age=0,no-cache");
  15.     uc.setRequestProperty("Pragma", "no-cache");
  16.     
  17.     log.debug("Logging an attempt to connect to: " + url);
  18.     
  19.     in = openConnectionCheckRedirects(uc);
  20.   }
  21.   catch (IOException io) {
  22.     log.warn("io while reading: " + url, io);
  23.   }
  24.   
  25.   return in;
  26. }

代码示例来源：origin: stackoverflow.com

  1. URL myURL = new URL(serviceURL);
  2. HttpURLConnection myURLConnection = (HttpURLConnection)myURL.openConnection();
  3. String userCredentials = "username:password";
  4. String basicAuth = "Basic " + new String(new Base64().encode(userCredentials.getBytes()));
  5. myURLConnection.setRequestProperty ("Authorization", basicAuth);
  6. myURLConnection.setRequestMethod("POST");
  7. myURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
  8. myURLConnection.setRequestProperty("Content-Length", "" + postData.getBytes().length);
  9. myURLConnection.setRequestProperty("Content-Language", "en-US");
  10. myURLConnection.setUseCaches(false);
  11. myURLConnection.setDoInput(true);
  12. myURLConnection.setDoOutput(true);

代码示例来源：origin: org.codehaus.groovy/groovy

  1. /**
  2.    * Opens an {@link InputStream} reading from the given URL without
  3.    * caching the stream. This prevents file descriptor leaks when reading
  4.    * from file system URLs.
  5.    *
  6.    * @param url the URL to connect to
  7.    * @return an input stream reading from the URL connection
  8.    */
  9.   public static InputStream openUncachedStream(URL url) throws IOException {
  10.     URLConnection urlConnection = url.openConnection();
  11.     urlConnection.setUseCaches(false);
  12.     return urlConnection.getInputStream();
  13.   }
  14. }

代码示例来源：origin: spotbugs/spotbugs

  1. /**
  2.  * When URL Connection uses cache, it may keep file handler. This method open connection without caching to avoid
  3.  * file handler leak.
  4.  *
  5.  * @return opened {@link URLConnection} which does not use cache to load data
  6.  * @see <a href="https://github.com/spotbugs/spotbugs/issues/589">related GitHub issue</a>
  7.  */
  8. @CheckReturnValue
  9. @NonNull
  10. public static URLConnection openNonCachedConnection(@NonNull URL u) throws IOException {
  11.   URLConnection uc = u.openConnection();
  12.   if (uc instanceof JarURLConnection) {
  13.     uc.setUseCaches(false);
  14.   }
  15.   return uc;
  16. }

代码示例来源：origin: stackoverflow.com

  1. URL url = new URL(targetURL);
  2. connection = (HttpURLConnection) url.openConnection();
  3. connection.setRequestMethod("POST");
  4. connection.setRequestProperty("Content-Type", 
  5.   "application/x-www-form-urlencoded");
  6. connection.setRequestProperty("Content-Length", 
  7.   Integer.toString(urlParameters.getBytes().length));
  8. connection.setRequestProperty("Content-Language", "en-US");  
  9. connection.setUseCaches(false);
  10. connection.setDoOutput(true);
  11.   connection.getOutputStream());
  12. wr.writeBytes(urlParameters);
  13. wr.close();
  14. InputStream is = connection.getInputStream();
  15. BufferedReader rd = new BufferedReader(new InputStreamReader(is));
  16. StringBuilder response = new StringBuilder(); // or StringBuffer if Java version 5+

代码示例来源：origin: apache/rocketmq

  1. public static String file2String(final URL url) {
  2.   InputStream in = null;
  3.   try {
  4.     URLConnection urlConnection = url.openConnection();
  5.     urlConnection.setUseCaches(false);
  6.     in = urlConnection.getInputStream();
  7.     int len = in.available();
  8.     byte[] data = new byte[len];
  9.     in.read(data, 0, len);
  10.     return new String(data, "UTF-8");
  11.   } catch (Exception ignored) {
  12.   } finally {
  13.     if (null != in) {
  14.       try {
  15.         in.close();
  16.       } catch (IOException ignored) {
  17.       }
  18.     }
  19.   }
  20.   return null;
  21. }

代码示例来源：origin: stackoverflow.com

  1. URL url;
  2. URLConnection urlConn;
  3. DataOutputStream printout;
  4. DataInputStream  input;
  5. url = new URL (getCodeBase().toString() + "env.tcgi");
  6. urlConn = url.openConnection();
  7. urlConn.setDoInput (true);
  8. urlConn.setDoOutput (true);
  9. urlConn.setUseCaches (false);
  10. urlConn.setRequestProperty("Content-Type","application/json");   
  11. urlConn.setRequestProperty("Host", "android.schoolportal.gr");
  12. urlConn.connect();  
  13. //Create JSONObject here
  14. JSONObject jsonParam = new JSONObject();
  15. jsonParam.put("ID", "25");
  16. jsonParam.put("description", "Real");
  17. jsonParam.put("enable", "true");

代码示例来源：origin: micronaut-projects/micronaut-core

  1. @Nonnull
  2. @Override
  3. public InputStream asInputStream() throws IOException {
  4.   URLConnection con = this.url.openConnection();
  5.   con.setUseCaches(true);
  6.   try {
  7.     return con.getInputStream();
  8.   } catch (IOException ex) {
  9.     if (con instanceof HttpURLConnection) {
  10.       ((HttpURLConnection) con).disconnect();
  11.     }
  12.     throw ex;
  13.   }
  14. }

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