Java InputStream類代碼示例

import java.io.InputStream; //導入依賴的package包/類
public File download(boolean delete, String link) throws IOException{
	URL url = new URL(link);
	URLConnection conn = url.openConnection();
	InputStream in = conn.getInputStream();
	File f = new File(defaultFolder, link);
	FileOutputStream out = new FileOutputStream(f);
	byte[] buffer = new byte[1024];
	int len;
	while((len = in.read(buffer)) > 0){
		out.write(buffer, 0, len);
	}
	in.close();
	out.close();
	if(delete) f.deleteOnExit();
	return f;
}
 

import java.io.InputStream; //導入依賴的package包/類
private void streamBaseXInfos(String graph, String version, InputStream inputStream, boolean isSegmentXInfo)
        throws XInfoNotSupportedException, GraphImportException, GraphStorageException, GraphNotExistsException {
    //First checkk if already another import is running. The singleton serverStatus has to be injected therefore
    if (!serverStatus.registerImport()) {
        throw new GraphImportException("Sorry, system is busy, a graph import is currently executed");
    }
    IBaseSegmentProducer<IBaseSegment> producer = null;
    try {

        BlockingQueue<IBaseSegment> segmentsQueue;

        segmentsQueue = new ArrayBlockingQueue<>(queueSize);

        producer = new BaseSegmentProducerImpl<>(inputFormat, inputStream, segmentsQueue);

        Thread producerThread = new Thread(producer, "basesegment-xinfo-parser-thread");
        producerThread.start();

        List<IBaseSegment> segments = new ArrayList<>();
        while (producerThread.isAlive() || !segmentsQueue.isEmpty()) {
            if (!segmentsQueue.isEmpty()) {
                segments.add(segmentsQueue.poll());
            }
            if (segments.size() >= this.batchSize) {
                this.writeSegments(segments,graph,version,isSegmentXInfo);
                segments.clear();
            }
        }
        this.writeSegments(segments,graph,version,isSegmentXInfo);
    } finally {
        serverStatus.unregisterImport();
        if (producer != null && producer.getException() != null) {
            throw new GraphImportException("Graph could not be imported",producer.getException());
        }
    }
}
 

import java.io.InputStream; //導入依賴的package包/類
private static String getMD5(final InputStream is, final int bufLen) {
    if (is == null || bufLen <= 0) {
        return null;
    }
    try {
        MessageDigest md = MessageDigest.getInstance(Algorithm.MD5.getType());
        StringBuilder md5Str = new StringBuilder(32);

        byte[] buf = new byte[bufLen];
        int readCount = 0;
        while ((readCount = is.read(buf)) != -1) {
            md.update(buf, 0, readCount);
        }

        byte[] hashValue = md.digest();

        for (int i = 0; i < hashValue.length; i++) {
            md5Str.append(Integer.toString((hashValue[i] & 0xff) + 0x100, 16).substring(1));
        }
        return md5Str.toString();
    } catch (Exception e) {
        return null;
    }
}
 

import java.io.InputStream; //導入依賴的package包/類
public static String exportResource(Context context, int resourceId, String dirname) {
    String fullname = context.getResources().getString(resourceId);
    String resName = fullname.substring(fullname.lastIndexOf("/") + 1);
    try {
        InputStream is = context.getResources().openRawResource(resourceId);
        File resDir = context.getDir(dirname, Context.MODE_PRIVATE);
        File resFile = new File(resDir, resName);

        FileOutputStream os = new FileOutputStream(resFile);

        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = is.read(buffer)) != -1) {
            os.write(buffer, 0, bytesRead);
        }
        is.close();
        os.close();

        return resFile.getAbsolutePath();
    } catch (IOException e) {
        e.printStackTrace();
        throw new CvException("Failed to export resource " + resName
                + ". Exception thrown: " + e);
    }
}
 

import java.io.InputStream; //導入依賴的package包/類
@Test
public void testStorageModifyCommand() throws IOException {
    String text = "Tobato is a good man. this is a test of StorageTruncateCommand.";
    InputStream firstIn = getTextInputStream(text);
    long firstSize = firstIn.available();
    // 上載文字
    System.out.println(firstSize);
    StorePath path = uploadInputStream(firstIn, "txt", firstSize, true);
    // 文件修改
    String Modifytext = "This is a test of StorageModifyCommand";
    InputStream modifyIn = getTextInputStream(Modifytext);
    long modifySize = modifyIn.available();
    // 觀察運行效果:
    // fileOffset參數0 結果為 This is a test of StorageModifyCommandf
    // StorageTruncateCommand
    // fileOffset參數為20 結果為 Tobato is a good manThis is a test of
    // StorageModifyCommandmand
    StorageModifyCommand command = new StorageModifyCommand(path.getPath(), modifyIn, modifySize, 0);
    executeStoreCmd(command);
    LOGGER.debug("--文件修改處理成功--");
}
 

import java.io.InputStream; //導入依賴的package包/類
@Test
public void testGetContentSegment() {
    final BinaryService resolver = new HttpBasedBinaryService(idService.getSupplier("http://example.org/"));

    final Optional<InputStream> res = resolver.getContent(resource, singletonList(between(5, 20)));
    assertTrue(res.isPresent());
    final String str = res.map(this::uncheckedToString).get();

    assertFalse(str.contains("owl:Ontology"));
    assertEquals(16, str.length());
}
 

import java.io.InputStream; //導入依賴的package包/類
/**
* 
* @param file 書き込み先のファイルオブジェクト
* @param content 書き込む內容(InputStream)
* 
* <p>writeFile - Utils</p>
* 
* <p>contentで指定した內容をファイルに書き込みます。</p>
* 
* Jupiter by Jupiter Development Team
* 
*/

  public static void writeFile(File file, InputStream content) throws IOException {
      if (content == null) {
          throw new IllegalArgumentException("content must not be null");
      }
      if (!file.exists()) {
          file.createNewFile();
      }
      FileOutputStream stream = new FileOutputStream(file);
      byte[] buffer = new byte[1024];
      int length;
      while ((length = content.read(buffer)) != -1) {
          stream.write(buffer, 0, length);
      }
      stream.close();
      content.close();
  }
 

import java.io.InputStream; //導入依賴的package包/類
private synchronized Thread pipe(InputStream is, OutputStream os, char tag) {
    return new Thread("TunnelPipe("+tag+")") {
        @Override
        public void run() {
            try {
                try {
                    int c;
                    while ((c = is.read()) != -1) {
                        os.write(c);
                        os.flush();
                        // if DEBUG prints a + or a - for each transferred
                        // character.
                        if (DEBUG) System.out.print(tag);
                    }
                    is.close();
                } finally {
                    os.close();
                }
            } catch (IOException ex) {
                if (DEBUG) ex.printStackTrace(System.out);
            }
        }
    };
}
 

import java.io.InputStream; //導入依賴的package包/類
private static InputStream getInputStream(URL jar) throws IOException {
  //to fix offset caused by launch4j
  InputStream is = jar.openStream();
  Log.debug("Scanning for jar...");
  long offset = 0;
  boolean found = false;
  try {
    while (true) {
      if (getUnsignedInt(is) == 0x04034b50L) {
        found = true;
        break;
      }
      offset += 4;
    }
  } catch (IOException ignored) {
  }
  is.close();

  InputStream finalIS = jar.openStream();
  if (!found) {
    Log.debug("Failed to find start");
  } else {
    Log.debug("Skipping " + offset + " bytes until start of jar [" + finalIS.skip(offset) + "]");
    if (finalIS.markSupported()) finalIS.mark(Integer.MAX_VALUE);
  }
  return finalIS;
}
 

import java.io.InputStream; //導入依賴的package包/類
/**
 *  鍙戦�丳ost璿鋒眰
 * @param url
 * @param params
 * @return
 * @throws IOException 
 * @throws NoSuchProviderException 
 * @throws NoSuchAlgorithmException 
 * @throws KeyManagementException 
 */
public static String post(String url, String params,Boolean https) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
	StringBuffer bufferRes = null;
    TrustManager[] tm = { new MyX509TrustManager() };
    SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
    sslContext.init(null, tm, new java.security.SecureRandom());
    // 浠庝笂榪癝SLContext瀵矽薄涓緱鍒癝SLSocketFactory瀵矽薄  
    SSLSocketFactory ssf = sslContext.getSocketFactory();

    URL urlGet = new URL(url);
    HttpsURLConnection http = (HttpsURLConnection) urlGet.openConnection();
    // 榪炴帴瓚呮椂
    http.setConnectTimeout(50000);
    // 璿誨彇瓚呮椂 --鏈嶅姟鍣ㄥ搷搴旀瘮杈冩參锛屽澶ф椂闂�
    http.setReadTimeout(50000);
    http.setRequestMethod("POST");
    http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
    http.setSSLSocketFactory(ssf);
    http.setHostnameVerifier(new Verifier());
    http.setDoOutput(true);
    http.setDoInput(true);
    http.connect();

    OutputStream out = http.getOutputStream();
    out.write(params.getBytes("UTF-8"));
    out.flush();
    out.close();

    InputStream in = http.getInputStream();
    BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
    String valueString = null;
    bufferRes = new StringBuffer();
    while ((valueString = read.readLine()) != null){
        bufferRes.append(valueString);
    }
    in.close();
    if (http != null) {
        // 鍏抽棴榪炴帴
        http.disconnect();
    }
    return bufferRes.toString();
}
 

import java.io.InputStream; //導入依賴的package包/類
/**
 * Returns an {@link Image} encoded by the specified {@link InputStream}.
 * 
 * @param stream
 *            the {@link InputStream} encoding the image data
 * @return the {@link Image} encoded by the specified input stream
 */
protected static Image getImage(InputStream stream) throws IOException {
	try {
		Display display = Display.getCurrent();
		ImageData data = new ImageData(stream);
		if (data.transparentPixel > 0) {
			return new Image(display, data, data.getTransparencyMask());
		}
		return new Image(display, data);
	} finally {
		stream.close();
	}
}
 

import java.io.InputStream; //導入依賴的package包/類
static void check(Object source) throws Exception {
     AudioFileFormat aff2 = null;
     if (source instanceof File) {
        aff2 = AudioSystem.getAudioFileFormat((File) source);
     }
     else if (source instanceof InputStream) {
        aff2 = AudioSystem.getAudioFileFormat((InputStream) source);
     }
     else if (source instanceof URL) {
        aff2 = AudioSystem.getAudioFileFormat((URL) source);
     } else throw new Exception("wrong source. Test FAILED");
     System.out.println("Got: "+aff2);
     if (aff2.getFormat().getSampleSizeInBits()==-1) {
        throw new Exception("wrong audio format. Test FAILED");
     }
}
 

import java.io.InputStream; //導入依賴的package包/類
private static void copyStream(InputStream is, OutputStream os)
    throws IOException
{
    byte[] copyBuf = new byte[8192];
    int n;
    while ((n = is.read(copyBuf)) != -1) {
        os.write(copyBuf, 0, n);
    }
}
 

import java.io.InputStream; //導入依賴的package包/類
@Override
public Properties getProperties(String path) {
    InputStream is = getInputStream(path);
    Properties res = new Properties();
    if (is != null) {
        try {
            res.loadFromXML(is);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }
    return res;
}
 

import java.io.InputStream; //導入依賴的package包/類
/**
 * reads a template from an inputstream
 */
private void readTemplateFromStream(String id, InputStream stream) throws IOException
{
    NBTTagCompound nbttagcompound = CompressedStreamTools.readCompressed(stream);
    Template template = new Template();
    template.read(nbttagcompound);
    this.templates.put(id, template);
}