// check and compare canEncoding/Encoding
static char[] checkEncoding(Charset oldCS, Charset newCS) throws Exception {
System.out.printf("Encoding <%s> <%s>...%n", oldCS.name(), newCS.name());
CharsetEncoder encOLD = oldCS.newEncoder();
CharsetEncoder encNew = newCS.newEncoder();
char[] cc = new char[0x10000];
int pos = 0;
boolean is970 = "x-IBM970-Old".equals(oldCS.name());
for (char c = 0; c < 0xffff; c++) {
boolean canOld = encOLD.canEncode(c);
boolean canNew = encNew.canEncode(c);
if (is970 && c == 0x2299) continue;
if (canOld != canNew) {
if (canNew) {
System.out.printf(" NEW(only): ");
printEntry(c, newCS);
} else {
if (is970) {
byte[] bb = new String(new char[] {c}).getBytes(oldCS);
if (bb.length == 2 && bb[0] == (byte) 0xa2 && bb[1] == (byte) 0xc1) {
// we know 970 has bogus nnnn -> a2c1 -> 2299
continue;
}
}
System.out.printf(" OLD(only): ");
printEntry(c, oldCS);
}
} else if (canNew) {
byte[] bbNew = new String(new char[] {c}).getBytes(newCS);
byte[] bbOld = new String(new char[] {c}).getBytes(oldCS);
if (!Arrays.equals(bbNew, bbOld)) {
System.out.printf(" c->b NEW: ");
printEntry(c, newCS);
System.out.printf(" c->b OLD: ");
printEntry(c, oldCS);
} else {
String sNew = new String(bbNew, newCS);
String sOld = new String(bbOld, oldCS);
if (!sNew.equals(sOld)) {
System.out.printf(" b2c NEW (c=%x):", c & 0xffff);
printEntry(sNew.charAt(0), newCS);
System.out.printf(" b2c OLD:");
printEntry(sOld.charAt(0), oldCS);
}
}
}
if (canNew & canOld) { // added only both for now
cc[pos++] = c;
}
}
return Arrays.copyOf(cc, pos);
}
public static void main(String args[]) throws Exception {
String inputFile = "samplein.txt";
String outputFile = "sampleout.txt";
RandomAccessFile inf = new RandomAccessFile(inputFile, "r");
RandomAccessFile outf = new RandomAccessFile(outputFile, "rw");
long inputLength = new File(inputFile).length();
FileChannel inc = inf.getChannel();
FileChannel outc = outf.getChannel();
MappedByteBuffer inputData = inc.map(FileChannel.MapMode.READ_ONLY, 0, inputLength);
Charset latin1 = Charset.forName("ISO-8859-1");
CharsetDecoder decoder = latin1.newDecoder();
CharsetEncoder encoder = latin1.newEncoder();
CharBuffer cb = decoder.decode(inputData);
// Process char data here
ByteBuffer outputData = encoder.encode(cb);
outc.write(outputData);
inf.close();
outf.close();
}
/**
* Creates a string in a specfied character set.
*
* @param value String constant, must not be null
* @param charsetName Name of the character set, may be null
* @param collation Collation, may be null
* @throws IllegalCharsetNameException If the given charset name is illegal
* @throws UnsupportedCharsetException If no support for the named charset is available in this
* instance of the Java virtual machine
* @throws RuntimeException If the given value cannot be represented in the given charset
*/
public NlsString(String value, String charsetName, SqlCollation collation) {
assert value != null;
if (null != charsetName) {
charsetName = charsetName.toUpperCase();
this.charsetName = charsetName;
String javaCharsetName = SqlUtil.translateCharacterSetName(charsetName);
if (javaCharsetName == null) {
throw new UnsupportedCharsetException(charsetName);
}
this.charset = Charset.forName(javaCharsetName);
CharsetEncoder encoder = charset.newEncoder();
// dry run to see if encoding hits any problems
try {
encoder.encode(CharBuffer.wrap(value));
} catch (CharacterCodingException ex) {
throw RESOURCE.charsetEncoding(value, javaCharsetName).ex();
}
} else {
this.charsetName = null;
this.charset = null;
}
this.collation = collation;
this.value = value;
}
static byte[] encode(char[] cc, Charset cs, boolean testDirect, Time t) throws Exception {
ByteBuffer bbf;
CharBuffer cbf;
CharsetEncoder enc = cs.newEncoder();
String csn = cs.name();
if (testDirect) {
bbf = ByteBuffer.allocateDirect(cc.length * 4);
cbf = ByteBuffer.allocateDirect(cc.length * 2).asCharBuffer();
cbf.put(cc).flip();
} else {
bbf = ByteBuffer.allocate(cc.length * 4);
cbf = CharBuffer.wrap(cc);
}
CoderResult cr = null;
long t1 = System.nanoTime() / 1000;
for (int i = 0; i < iteration; i++) {
cbf.rewind();
bbf.clear();
enc.reset();
cr = enc.encode(cbf, bbf, true);
}
long t2 = System.nanoTime() / 1000;
t.t = (t2 - t1) / iteration;
if (cr != CoderResult.UNDERFLOW) {
System.out.println("ENC-----------------");
int pos = cbf.position();
System.out.printf(" cr=%s, cbf.pos=%d, cc[pos]=%x%n", cr.toString(), pos, cc[pos] & 0xffff);
throw new RuntimeException("Encoding err: " + csn);
}
byte[] bb = new byte[bbf.position()];
bbf.flip();
bbf.get(bb);
return bb;
}
static void testMixed(Charset cs) throws Throwable {
CharsetDecoder dec =
cs.newDecoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);
CharsetEncoder enc =
cs.newEncoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);
List<Integer> cps = new ArrayList<>(0x10000);
int off = 0;
int cp = 0;
while (cp < 0x10000) {
if (enc.canEncode((char) cp)) {
cps.add(cp);
}
cp++;
}
Collections.shuffle(cps);
char[] bmpCA = new char[cps.size()];
for (int i = 0; i < cps.size(); i++) bmpCA[i] = (char) (int) cps.get(i);
String bmpStr = new String(bmpCA);
// getBytes(csn);
byte[] bmpBA = bmpStr.getBytes(cs.name());
ByteBuffer bf = enc.reset().encode(CharBuffer.wrap(bmpCA));
byte[] baNIO = new byte[bf.limit()];
bf.get(baNIO, 0, baNIO.length);
if (!Arrays.equals(bmpBA, baNIO)) {
throw new RuntimeException("getBytes(csn) failed -> " + cs.name());
}
// getBytes(cs);
bmpBA = bmpStr.getBytes(cs);
if (!Arrays.equals(bmpBA, baNIO))
throw new RuntimeException("getBytes(cs) failed -> " + cs.name());
// new String(csn);
String strSC = new String(bmpBA, cs.name());
String strNIO = dec.reset().decode(ByteBuffer.wrap(bmpBA)).toString();
if (!strNIO.equals(strSC)) {
throw new RuntimeException("new String(csn) failed -> " + cs.name());
}
// new String(cs);
strSC = new String(bmpBA, cs);
if (!strNIO.equals(strSC)) throw new RuntimeException("new String(cs) failed -> " + cs.name());
}
static void checkInit(String csn) throws Exception {
System.out.printf("Check init <%s>...%n", csn);
Charset.forName("Big5"); // load in the ExtendedCharsets
long t1 = System.nanoTime() / 1000;
Charset cs = Charset.forName(csn);
long t2 = System.nanoTime() / 1000;
System.out.printf(" charset :%d%n", t2 - t1);
t1 = System.nanoTime() / 1000;
cs.newDecoder();
t2 = System.nanoTime() / 1000;
System.out.printf(" new Decoder :%d%n", t2 - t1);
t1 = System.nanoTime() / 1000;
cs.newEncoder();
t2 = System.nanoTime() / 1000;
System.out.printf(" new Encoder :%d%n", t2 - t1);
}
public static void main(String[] args) throws Exception {
// 创建简体中文对应的Charset
Charset cn = Charset.forName("GBK");
// 获取cn对象对应的编码器和解码器
CharsetEncoder cnEncoder = cn.newEncoder();
CharsetDecoder cnDecoder = cn.newDecoder();
// 创建一个CharBuffer对象
CharBuffer cbuff = CharBuffer.allocate(8);
cbuff.put('孙');
cbuff.put('悟');
cbuff.put('空');
cbuff.flip();
// 将CharBuffer中的字符序列转换成字节序列
ByteBuffer bbuff = cnEncoder.encode(cbuff);
// 循环访问ByteBuffer中的每个字节
for (int i = 0; i < bbuff.capacity(); i++) {
System.out.print(bbuff.get(i) + " ");
}
// 将ByteBuffer的数据解码成字符序列
System.out.println("\n" + cnDecoder.decode(bbuff));
}
static CoderResult encodeCR(char[] cc, Charset cs, boolean testDirect) throws Exception {
ByteBuffer bbf;
CharBuffer cbf;
CharsetEncoder enc = cs.newEncoder();
if (testDirect) {
bbf = ByteBuffer.allocateDirect(cc.length * 4);
cbf = ByteBuffer.allocateDirect(cc.length * 2).asCharBuffer();
cbf.put(cc).flip();
} else {
bbf = ByteBuffer.allocate(cc.length * 4);
cbf = CharBuffer.wrap(cc);
}
CoderResult cr = null;
for (int i = 0; i < iteration; i++) {
cbf.rewind();
bbf.clear();
enc.reset();
cr = enc.encode(cbf, bbf, true);
}
return cr;
}
public static void main(String[] args) throws Throwable {
final int itrs = Integer.getInteger("iterations", 100000);
// final int itrs = Integer.getInteger("iterations", 12);
final int size = Integer.getInteger("size", 2048);
final int subsize = Integer.getInteger("subsize", 128);
final int maxchar = Integer.getInteger("maxchar", 128);
final String regex = System.getProperty("filter");
final Pattern filter = (regex == null) ? null : Pattern.compile(regex);
final boolean useSecurityManager = Boolean.getBoolean("SecurityManager");
if (useSecurityManager) System.setSecurityManager(new PermissiveSecurityManger());
final Random rnd = new Random();
String[] csns =
new String[] {
"Big5",
"Johab",
"EUC_CN",
"EUC_KR",
"MS932",
"MS936",
"MS949",
"MS950",
"GBK",
"Big5_HKSCS",
"Big5_HKSCS_2001",
"Big5_Solaris",
"MS950_HKSCS",
"MS950_HKSCS_XP",
"IBM1364",
"IBM1381",
"IBM1383",
"IBM930",
"IBM933",
"IBM935",
"IBM937",
"IBM939",
"IBM942",
"IBM943",
"IBM948",
"IBM949",
"IBM950",
"IBM970",
};
ArrayList<long[]> sum = new ArrayList<>();
for (final String csn : csns) {
final Charset cs = Charset.forName(csn);
List<Integer> cps = new ArrayList<>(0x4000);
int off = 0;
int cp = 0;
int n = 0;
CharsetEncoder enc = cs.newEncoder();
while (cp < 0x10000 && n < cps.size()) {
if (enc.canEncode((char) cp)) {
cps.add(cp);
n++;
}
cp++;
}
Collections.shuffle(cps);
char[] ca = new char[cps.size()];
for (int i = 0; i < cps.size(); i++) ca[i] = (char) (int) cps.get(i);
System.out.printf("%n--------%s---------%n", csn);
for (int sz = 8; sz <= 2048; sz *= 2) {
System.out.printf(" [len=%d]%n", sz);
final char[] chars = Arrays.copyOf(ca, sz);
final String str = new String(chars);
final byte[] bs = str.getBytes(cs);
Job[] jobs = {
new Job("String decode: csn") {
public void work() throws Throwable {
for (int i = 0; i < itrs; i++) new String(bs, csn);
}
},
new Job("String decode: cs") {
public void work() throws Throwable {
for (int i = 0; i < itrs; i++) new String(bs, cs);
}
},
new Job("String encode: csn") {
public void work() throws Throwable {
for (int i = 0; i < itrs; i++) str.getBytes(csn);
}
},
new Job("String encode: cs") {
public void work() throws Throwable {
for (int i = 0; i < itrs; i++) str.getBytes(cs);
}
},
};
sum.add(time(jobs));
}
}
}
static void test(Charset cs, char[] bmpCA, byte[] sbBA) throws Throwable {
String bmpStr = new String(bmpCA);
CharsetDecoder dec =
cs.newDecoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);
CharsetEncoder enc =
cs.newEncoder()
.onMalformedInput(CodingErrorAction.REPLACE)
.onUnmappableCharacter(CodingErrorAction.REPLACE);
// getBytes(csn);
byte[] baSC = bmpStr.getBytes(cs.name());
ByteBuffer bf = enc.reset().encode(CharBuffer.wrap(bmpCA));
byte[] baNIO = new byte[bf.limit()];
bf.get(baNIO, 0, baNIO.length);
if (!Arrays.equals(baSC, baNIO))
throw new RuntimeException("getBytes(csn) failed -> " + cs.name());
// getBytes(cs);
baSC = bmpStr.getBytes(cs);
if (!Arrays.equals(baSC, baNIO))
throw new RuntimeException("getBytes(cs) failed -> " + cs.name());
// new String(csn);
String strSC = new String(sbBA, cs.name());
String strNIO = dec.reset().decode(ByteBuffer.wrap(sbBA)).toString();
if (!strNIO.equals(strSC))
throw new RuntimeException("new String(csn) failed -> " + cs.name());
// new String(cs);
strSC = new String(sbBA, cs);
if (!strNIO.equals(strSC)) throw new RuntimeException("new String(cs) failed -> " + cs.name());
// encode unmappable surrogates
if (enc instanceof sun.nio.cs.ArrayEncoder && cs.contains(Charset.forName("ASCII"))) {
if (cs.name().equals("UTF-8")
|| // utf8 handles surrogates
cs.name().equals("CESU-8")) // utf8 handles surrogates
return;
enc.replaceWith(new byte[] {(byte) 'A'});
sun.nio.cs.ArrayEncoder cae = (sun.nio.cs.ArrayEncoder) enc;
String str = "ab\uD800\uDC00\uD800\uDC00cd";
byte[] ba = new byte[str.length() - 2];
int n = cae.encode(str.toCharArray(), 0, str.length(), ba);
if (n != 6 || !"abAAcd".equals(new String(ba, cs.name())))
throw new RuntimeException("encode1(surrogates) failed -> " + cs.name());
ba = new byte[str.length()];
n = cae.encode(str.toCharArray(), 0, str.length(), ba);
if (n != 6 || !"abAAcd".equals(new String(ba, 0, n, cs.name())))
throw new RuntimeException("encode2(surrogates) failed -> " + cs.name());
str = "ab\uD800B\uDC00Bcd";
ba = new byte[str.length()];
n = cae.encode(str.toCharArray(), 0, str.length(), ba);
if (n != 8 || !"abABABcd".equals(new String(ba, 0, n, cs.name())))
throw new RuntimeException("encode3(surrogates) failed -> " + cs.name());
/* sun.nio.cs.ArrayDeEncoder works on the assumption that the
invoker (StringCoder) allocates enough output buf, utf8
and double-byte coder does not check the output buffer limit.
ba = new byte[str.length() - 1];
n = cae.encode(str.toCharArray(), 0, str.length(), ba);
if (n != 7 || !"abABABc".equals(new String(ba, 0, n, cs.name()))) {
throw new RuntimeException("encode4(surrogates) failed -> "
+ cs.name());
}
*/
}
}