计算精度问题带根号√ ³√
UNICODE字符表
package util;import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** radical* 根号√运算问题 Unicode * * @author ZengWenFeng* @email 117791303@qq.com* @date 2015.04.07*/
public class UnicodeUtil
{/*** 字符串转Unicode* * @author ZengWenFeng* @email 117791303@qq.com* @date 2015.04.07* @param string* @return*/public static String encode(String string){char[] utfBytes = string.toCharArray();String unicodeBytes = "";for (int i = 0; i < utfBytes.length; i++){String hexB = Integer.toHexString(utfBytes[i]);if (hexB.length() <= 2){hexB = "00" + hexB;}unicodeBytes = unicodeBytes + "\\u" + hexB;}return unicodeBytes;}/*** Unicode转字符串* * @author ZengWenFeng* @email 117791303@qq.com* @date 2015.04.07* @param unicode* @return*/public static String decode(String unicode){Pattern pattern = Pattern.compile("(\\\\u(\\p{XDigit}{4}))");Matcher matcher = pattern.matcher(unicode);char ch;while (matcher.find()){ch = (char) Integer.parseInt(matcher.group(2), 16);unicode = unicode.replace(matcher.group(1), ch + "");}return unicode;}public static void main(String[] args){String str = "文锋";String unicode = encode(str);System.out.println(str + " ---> " + unicode); // \u6587\u950bString zh_cn = decode(unicode);System.out.println(unicode + " ---> " + zh_cn);zh_cn = decode("\u2713");System.out.println(zh_cn);//³√unicode = encode("3³√");System.out.println(unicode);// \u0033\u00b3\u221a}}
