汉字转UniCode

来源：互联网发布：上海地区大学知乎编辑：程序博客网时间：2024/05/22 14:20
public class Test1 {private static final char[] hexDigit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',        'B', 'C', 'D', 'E', 'F' };private static char toHex(int nibble) {        return hexDigit[(nibble & 0xF)];    }/** * 将字符串编码成 Unicode 形式的字符串. 如 "黄" to "\u9EC4" *  * Converts unicodes to encoded \\uxxxx and escapes *  * special characters with a preceding slash * @param theString *            待转换成Unicode编码的字符串。 * @param escapeSpace *            是否忽略空格，为true时在空格后面是否加个反斜杠。 * @return 返回转换后Unicode编码的字符串。 */public static String toEncodedUnicode(String theString, boolean escapeSpace) {int len = theString.length();int bufLen = len * 2;if (bufLen < 0) {bufLen = Integer.MAX_VALUE;}StringBuffer outBuffer = new StringBuffer(bufLen);for (int x = 0; x < len; x++) {char aChar = theString.charAt(x);// Handle common case first, selecting largest block that// avoids the specials belowif ((aChar > 61) && (aChar < 127)) {if (aChar == '\\') {outBuffer.append('\\');outBuffer.append('\\');continue;}outBuffer.append(aChar);continue;}switch (aChar) {case ' ':if (x == 0 || escapeSpace)outBuffer.append('\\');outBuffer.append(' ');break;case '\t':outBuffer.append('\\');outBuffer.append('t');break;case '\n':outBuffer.append('\\');outBuffer.append('n');break;case '\r':outBuffer.append('\\');outBuffer.append('r');break;case '\f':outBuffer.append('\\');outBuffer.append('f');break;case '=': // Fall throughcase ':': // Fall throughcase '#': // Fall throughcase '!':outBuffer.append('\\');outBuffer.append(aChar);break;default:if ((aChar < 0x0020) || (aChar > 0x007e)) {// 每个unicode有16位，每四位对应的16进制从高位保存到低位outBuffer.append('\\');outBuffer.append('u');outBuffer.append(toHex((aChar >> 12) & 0xF));outBuffer.append(toHex((aChar >> 8) & 0xF));outBuffer.append(toHex((aChar >> 4) & 0xF));outBuffer.append(toHex(aChar & 0xF));} else {outBuffer.append(aChar);}}}return outBuffer.toString();}public static void main(String[] args) {System.out.println(DateUtil.praseDate("2014-02-24"));}}
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