Java DataInputStream.read方法代码示例

import java.io.DataInputStream; //导入方法依赖的package包/类
/**
 * GZip解压
 *
 * @param bContent
 * @return
 */
public static byte[] unGZip(byte[] bContent) {
    byte[] data = new byte[1024];
    try {
        ByteArrayInputStream in = new ByteArrayInputStream(bContent);
        GZIPInputStream pIn = new GZIPInputStream(in);
        DataInputStream objIn = new DataInputStream(pIn);
        int len = 0;
        int count = 0;
        while ((count = objIn.read(data, len, len + 1024)) != -1) {
            len = len + count;
        }
        byte[] trueData = new byte[len];
        System.arraycopy(data, 0, trueData, 0, len);
        objIn.close();
        pIn.close();
        in.close();

        return trueData;

    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
private StringMapping loadVarMapping(ZipFile zf, String varName) throws IOException {

		InputStream zis = zf.getInputStream(new ZipEntry(varName + "_Map" + JwatSession.BINext));
		//System.out.println("Entry " + varName+"_Map"+JwatSession.BINext);
		DataInputStream dis = new DataInputStream(zis);

		StringMapping map = new StringMapping();
		double val;
		String str;
		int numEl = dis.read();

		for (int i = 0; i < numEl; i++) {
			val = dis.readDouble();
			str = dis.readUTF();
			map.addNewMapping(val, str);
		}

		return map;
	}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
@Test
public void serializeTrieWithTwoLongValues() throws IOException {
    byte[] value1 = TrieImplValueTest.makeValue(100);
    byte[] value2 = TrieImplValueTest.makeValue(200);

    Trie trie = new TrieImpl(new TrieStoreImpl(new HashMapDB()), false)
            .put("foo".getBytes(), value1)
            .put("bar".getBytes(), value2);

    byte[] bytes = trie.serialize();

    Assert.assertNotNull(bytes);

    ByteArrayInputStream bstream = new ByteArrayInputStream(bytes);
    DataInputStream ostream = new DataInputStream(bstream);

    Assert.assertEquals(0, ostream.readShort());

    byte[] root = new byte[SHA3Helper.DEFAULT_SIZE_BYTES];
    ostream.read(root);

    Assert.assertArrayEquals(trie.getHash(), root);
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
/**
 * Loads an ICU binary data file and returns it as a ByteBuffer.
 * The buffer contents is normally read-only, but its position etc. can be modified.
 *
 * @param itemPath Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
 * @return The data as a read-only ByteBuffer.
 */
public static ByteBuffer getRequiredData(String itemPath) {
    final Class<ICUBinary> root = ICUBinary.class;

    try (InputStream is = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
            public InputStream run() {
                return root.getResourceAsStream(itemPath);
            }
        })) {

        BufferedInputStream b=new BufferedInputStream(is, 4096 /* data buffer size */);
        DataInputStream inputStream = new DataInputStream(b);
        byte[] bb = new byte[120000];
        int n = inputStream.read(bb);
        ByteBuffer bytes = ByteBuffer.wrap(bb, 0, n);
        return bytes;
    }
    catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
/**
 * Sends a heartbeat to the drone.
 *
 * @throws IOException if sending the heartbeat to the drone failed
 */
private void sendHeartBeat() throws IOException {
    byte[] heartbeatData = ByteUtils.loadMessageFromFile("bin/heartbeat.bin");
    int start = 0;
    int length = heartbeatData.length;

    OutputStream outputStream = socket.getOutputStream();
    DataOutputStream dataOutputStream = new DataOutputStream(outputStream);

    if (length > 0) {
        dataOutputStream.write(heartbeatData, start, length);
    }

    dataOutputStream.flush();

    DataInputStream dataInputStream = new DataInputStream(socket.getInputStream());
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    byte[] buf = new byte[106];
    int bytesRead = dataInputStream.read(buf);

    byteArrayOutputStream.write(buf, 0, bytesRead);
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
/**
 * 添加客服帐号
 *
 * @param keFu
 * @return
 */
public static boolean insertKfAccount(KeFu keFu) {
    boolean isOk = false;
    String token = WeiXinUtils.getToken();
    if (token != null) {
        String urlString = "https://api.weixin.qq.com/customservice/kfaccount/add?access_token=" + token;
        try {
            URL url = new URL(urlString);
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
            String kfAccountString = JSONObject.toJSONString(keFu);
            httpsURLConnection.setRequestProperty("Content-length", String.valueOf(kfAccountString.length()));
            httpsURLConnection.setRequestProperty("Content-Type", "application/json");
            httpsURLConnection.setDoOutput(true);
            httpsURLConnection.setDoInput(true);
            DataOutputStream dataOutputStream = new DataOutputStream(httpsURLConnection.getOutputStream());
            dataOutputStream.write(kfAccountString.getBytes());
            dataOutputStream.flush();
            dataOutputStream.close();
            DataInputStream dataInputStream = new DataInputStream(httpsURLConnection.getInputStream());
            StringBuffer stringBuffer = new StringBuffer();
            int inputByte = dataInputStream.read();
            while (inputByte != -1) {
                stringBuffer.append((char) inputByte);
                inputByte = dataInputStream.read();
            }
            String kfString = stringBuffer.toString();
            JSONObject jsonObject = JSON.parseObject(kfString);
            if (jsonObject.containsKey("errcode")) {
                int errcode = jsonObject.getIntValue("errcode");
                if (errcode == 0) {
                    isOk = true;
                } else {
                    //TODO 添加客服账号失败
                    isOk = false;
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    return isOk;
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
public BytesEntry(byte type, DataInputStream in, int length) throws IOException {
    super(type);
    byte[] b = new byte[length];
    int l = in.read(b, 0, length);
    while (l < length) {
        l += in.read(b, l, length - l);
    }
    bytes = b;
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
public static String readNullableString(DataInputStream in) throws IOException {
    if (in.read() != 0) {
        return in.readUTF();
    } else {
        return null;
    }
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
private void readFile(FileSystem fileSys,Path name) throws IOException {
  //Just read file so that getNumBlockLocations are incremented
  DataInputStream stm = fileSys.open(name);
  byte [] buffer = new byte[4];
  stm.read(buffer,0,4);
  stm.close();
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
/**
 * 修改客服帐号
 *
 * @param keFu
 * @return
 */
public static boolean updateKfAccount(KeFu keFu) {
    boolean isOk = false;
    String token = WeiXinUtils.getToken();
    if (token != null) {
        String urlString = "https://api.weixin.qq.com/customservice/kfaccount/update?access_token=" + token;
        try {
            URL url = new URL(urlString);
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
            String kfAccountString = JSONObject.toJSONString(keFu);
            httpsURLConnection.setRequestProperty("Content-length", String.valueOf(kfAccountString.length()));
            httpsURLConnection.setRequestProperty("Content-Type", "application/json");
            httpsURLConnection.setDoOutput(true);
            httpsURLConnection.setDoInput(true);
            DataOutputStream dataOutputStream = new DataOutputStream(httpsURLConnection.getOutputStream());
            dataOutputStream.write(kfAccountString.getBytes());
            dataOutputStream.flush();
            dataOutputStream.close();
            DataInputStream dataInputStream = new DataInputStream(httpsURLConnection.getInputStream());
            StringBuffer stringBuffer = new StringBuffer();
            int inputByte = dataInputStream.read();
            while (inputByte != -1) {
                stringBuffer.append((char) inputByte);
                inputByte = dataInputStream.read();
            }
            String kfString = stringBuffer.toString();
            JSONObject jsonObject = JSON.parseObject(kfString);
            if (jsonObject.containsKey("errcode")) {
                int errcode = jsonObject.getIntValue("errcode");
                if (errcode == 0) {
                    isOk = true;
                } else {
                    //TODO 添加客服账号失败
                    isOk = false;
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    return isOk;
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
protected void build(OutputStream os) throws IOException {
    DataInputStream dis = new DataInputStream(classLoader.getResourceAsStream(resourceName));

    byte[] buf = new byte[256];
    int sz;
    while( (sz=dis.read(buf))>0 )
        os.write(buf,0,sz);

    dis.close();
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
@Override
protected void readMessage(InputStream in, int msgLength)
		throws IOException {
	int pos = 0;
	DataInputStream dis = new DataInputStream(in);
	topic = dis.readUTF();
	pos += FormatUtil.toMQttString(topic).length;
	if (getQos() != QoS.AT_MOST_ONCE) {
		super.readMessage(in, msgLength);
		pos += 2;
	}
	data = new byte[msgLength - pos];
	dis.read(data);
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
private void someReadingWithMetaBlock(Reader reader) throws IOException {
  DataInputStream din = null;
  readNumMetablocks(reader, 10);
  try {
    din = reader.getMetaBlock("NO ONE");
    assertTrue(false);
  }
  catch (MetaBlockDoesNotExist me) {
    // should catch
  }
  din = reader.getMetaBlock("TFileMeta100");
  int read = din.read();
  assertTrue("check for status", (read == -1));
  din.close();
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
public static void loadBinary(InputStream inStream) throws IOException {
    DataInputStream in = new DataInputStream(inStream);
    head = readShortTable(in, HEAD_LENGTH);
    int[] tableSizes = new int[INDEX_TABLEEND];
    for (int i = 0; i < INDEX_TABLEEND; i++) {
        tableSizes[i] = head[i + 1] - head[i];
    }
    table_scriptIDs       = readShortTable(in, tableSizes[INDEX_scriptIDs]);
    table_scriptFonts     = readShortTable(in, tableSizes[INDEX_scriptFonts]);
    table_elcIDs          = readShortTable(in, tableSizes[INDEX_elcIDs]);
    table_sequences        = readShortTable(in, tableSizes[INDEX_sequences]);
    table_fontfileNameIDs = readShortTable(in, tableSizes[INDEX_fontfileNameIDs]);
    table_componentFontNameIDs = readShortTable(in, tableSizes[INDEX_componentFontNameIDs]);
    table_filenames       = readShortTable(in, tableSizes[INDEX_filenames]);
    table_awtfontpaths    = readShortTable(in, tableSizes[INDEX_awtfontpaths]);
    table_exclusions      = readShortTable(in, tableSizes[INDEX_exclusions]);
    table_proportionals   = readShortTable(in, tableSizes[INDEX_proportionals]);
    table_scriptFontsMotif   = readShortTable(in, tableSizes[INDEX_scriptFontsMotif]);
    table_alphabeticSuffix   = readShortTable(in, tableSizes[INDEX_alphabeticSuffix]);
    table_stringIDs       = readShortTable(in, tableSizes[INDEX_stringIDs]);

    //StringTable cache
    stringCache = new String[table_stringIDs.length + 1];

    int len = tableSizes[INDEX_stringTable];
    byte[] bb = new byte[len * 2];
    table_stringTable = new char[len];
    in.read(bb);
    int i = 0, j = 0;
    while (i < len) {
       table_stringTable[i++] = (char)(bb[j++] << 8 | (bb[j++] & 0xff));
    }
    if (verbose) {
        dump();
    }
}
 

import java.io.DataInputStream; //导入方法依赖的package包/类
private static byte[] readToEndAsArray(InputStream input) throws IOException {
  DataInputStream dis = new DataInputStream(input);
  byte[] stuff = new byte[1024];
  ByteArrayOutputStream buff = new ByteArrayOutputStream();
  int read;
  while ((read = dis.read(stuff)) != -1) {
    buff.write(stuff, 0, read);
  }

  return buff.toByteArray();
}