unicode java转换_JAVA转化Unicode编码

喜欢ヅ旅行 2022-11-05 08:53 229阅读 0赞

package yyl.example.basic.codec;

import java.util.Locale;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class UnicodeUtil \{

//编码

public static String encode(String string) \{

StringBuilder sbr = new StringBuilder(string.length() \* 4);

for (char ch : string.toCharArray()) \{

if (ch > 0xfff) \{

sbr.append("\\\\u");

sbr.append(Integer.toHexString(ch).toUpperCase(Locale.ENGLISH));

\} else if (ch > 0xff) \{

sbr.append("\\\\u0");

sbr.append(Integer.toHexString(ch).toUpperCase(Locale.ENGLISH));

\} else if (ch > 0x7f) \{

sbr.append("\\\\u00");

sbr.append(Integer.toHexString(ch).toUpperCase(Locale.ENGLISH));

\} else if (ch < 32) \{

switch (ch) \{

case '\\b':

sbr.append('\\\\');

sbr.append('b');

break;

case '\\n':

sbr.append('\\\\');

sbr.append('n');

break;

case '\\t':

sbr.append('\\\\');

sbr.append('t');

break;

case '\\f':

sbr.append('\\\\');

sbr.append('f');

break;

case '\\r':

sbr.append('\\\\');

sbr.append('r');

break;

default:

if (ch > 0xf) \{

sbr.append("\\\\u00");

sbr.append(Integer.toHexString(ch).toUpperCase(Locale.ENGLISH));

\} else \{

sbr.append("\\\\u000");

sbr.append(Integer.toHexString(ch).toUpperCase(Locale.ENGLISH));

break;

\} else \{

switch (ch) \{

case '\\'':

sbr.append("\\\\u0027");

break;

case '"':

case '\\\\':

sbr.append("\\\\");

sbr.append(ch);

break;

default:

sbr.append(ch);

break;

return sbr.toString();

//解码

public static String decode(String unicode) \{

char\[\] chars = unicode.toCharArray();

StringBuilder buffer = new StringBuilder();

for (int i = 0, len = chars.length; i < len;) \{

char c = chars\[i++\];

switch (c) \{

case 0:

case '\\n':

case '\\r':

break;

case '\\\\':

c = chars\[i++\];

switch (c) \{

case 'b':

buffer.append('\\b');

break;

case 't':

buffer.append('\\t');

break;

case 'n':

buffer.append('\\n');

break;

case 'f':

buffer.append('\\f');

break;

case 'r':

buffer.append('\\r');

break;

case 'u':

buffer.append((char) Integer.parseInt(new String(new char\[\] \{//

chars\[i++\], chars\[i++\], chars\[i++\], chars\[i++\] //

\}), 16));//

break;

case 'x':

buffer.append((char) Integer.parseInt(new String(new char\[\] \{//

chars\[i++\], chars\[i++\] //

\}), 16));//

break;

default:

buffer.append(c);

break;

default:

buffer.append(c);

return buffer.toString();

/\*\*

\* 方法2

\* @param unicodeStr

\* @return

\*/

public static String unicodeToString(String unicodeStr) \{

Pattern pattern = Pattern.compile("(\\\\\\\\u(\\\\p\{XDigit\}\{4\}))");

Matcher matcher = pattern.matcher(unicodeStr);

char ch;

while (matcher.find()) \{

ch = (char) Integer.parseInt(matcher.group(2), 16);

unicodeStr = unicodeStr.replace(matcher.group(1), ch + "");

return unicodeStr;

public static void main(String\[\] args) \{

String unicode = encode("你好Unicode");

System.out.println(unicode);

StringBuilder sbr = new StringBuilder();

for (int i = 0; i < 1000; i++) \{

sbr.append(unicode);

unicode = sbr.toString();

//System.out.println(decode(unicode));

long l = System.currentTimeMillis();

for (int i = 0; i < 10000; i++) \{

decode(unicode);

//unicodeToString(unicode);

System.out.println(System.currentTimeMillis() - l);

unicode java转换_JAVA转化Unicode编码

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