non-blocking

RandomAccessFile(helloword/data.txt,

rw))

channel.read(buffer);log.debug(读到字节数{},

len);if

读模式buffer.flip();while(buffer.hasRemaining())

{log.debug({},

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flip

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个字节后状态

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clear

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调试工具类

0123456789abcdef.toCharArray();for

(int

StringBuilder(12);buf.append(NEWLINE);buf.append(Long.toHexString(i

0xFFFFFFFFL

0x100000000L));buf.setCharAt(buf.length()

|);buf.append(|);HEXDUMP_ROWPREFIXES[i]

buf.toString();}//

StringUtil.byteToHexStringPadded(i);}//

Generate

buffer.limit();buffer.limit(buffer.capacity());StringBuilder

origin

StringBuilder(256);appendPrettyHexDump(origin,

buffer,

buffer.capacity());System.out.println(----------------------------

all

----------------------------------------);System.out.printf(position:

[%d],

oldlimit);System.out.println(origin);buffer.limit(oldlimit);}/***

param

StringBuilder(256);appendPrettyHexDump(builder,

buffer,

buffer.position());System.out.println(----------------------------

read

---------------------------------------);System.out.printf(position:

[%d],

buffer.limit());System.out.println(builder);}private

static

appendPrettyHexDump(StringBuilder

dump,

IndexOutOfBoundsException(expected:

offset(

-------------------------------------------------

NEWLINE

-------------------------------------------------------------------------);final

int

prefix.appendHexDumpRowPrefix(dump,

row,

{dump.append(BYTE2HEX[getUnsignedByte(buf,

j)]);}dump.append(

{dump.append(BYTE2CHAR[getUnsignedByte(buf,

Dump

startIndex;appendHexDumpRowPrefix(dump,

fullRows,

{dump.append(BYTE2HEX[getUnsignedByte(buf,

j)]);}dump.append(HEXPADDING[remainder]);dump.append(

|);//

{dump.append(BYTE2CHAR[getUnsignedByte(buf,

j)]);}dump.append(BYTEPADDING[remainder]);dump.append(|);}dump.append(NEWLINE

-------------------------------------------------------------------------);}private

static

appendHexDumpRowPrefix(StringBuilder

dump,

{dump.append(HEXDUMP_ROWPREFIXES[row]);}

else

{dump.append(NEWLINE);dump.append(Long.toHexString(rowStartIndex

0xFFFFFFFFL

0x100000000L));dump.setCharAt(dump.length()

static

StandardCharsets.UTF_8.encode(你好);

ByteBuffer

Charset.forName(utf-8).encode(你好);debug(buffer1);

buffer3

StandardCharsets.UTF_8.decode(buffer1);

System.out.println(buffer3.getClass());

System.out.println(buffer3.toString());输出

-------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

--------------------------------------------------------------------------------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

-------------------------------------------------------------------------

class

RandomAccessFile(helloword/3parts.txt,

rw))

ByteBuffer.allocate(3);ByteBuffer

ByteBuffer.allocate(3);ByteBuffer

ByteBuffer.allocate(5);channel.read(new

ByteBuffer[]{a,

c});a.flip();b.flip();c.flip();debug(a);debug(b);debug(c);

catch

-------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

--------------------------------------------------------------------------------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

--------------------------------------------------------------------------------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

-------------------------------------------------------------------------2.5

Ga***ring

RandomAccessFile(helloword/3parts.txt,

rw))

ByteBuffer.allocate(4);ByteBuffer

ByteBuffer.allocate(4);channel.position(11);d.put(new

byte[]{f,

e});d.flip();e.flip();debug(d);debug(e);channel.write(new

ByteBuffer[]{d,

-------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

--------------------------------------------------------------------------------------------------------------------------|

-------------------------------------------------------------------------

|00000000|

-------------------------------------------------------------------------文件内容

网络上有多条数据发送给服务端数据之间使用

但由于某种原因这些数据在接收时被进行了重新组合例如原始数据有3条为

Hello,world\n

zhangsan\nHo.getBytes());split(source);source.put(w

are

you?\nhaha!\n.getBytes());split(source);

}private

{System.out.println(i);ByteBuffer

target

写debugAll(target);source.limit(oldLimit);}}source.compact();