java,js 解unicode

 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 public class UnicodeDecodeDataConverter
 {
     private String decodeUnicode( final String dataStr ) {
         int start = 0;
         int end = 0;
         final StringBuffer buffer = new StringBuffer();
         while( start > -1 ) {
         end = dataStr.indexOf( "\\\\u", start + 2 );
         String charStr = "";
         if( end == -1 ) {
         charStr = dataStr.substring( start + 2, dataStr.length() );
         } else {
         charStr = dataStr.substring( start + 2, end);
         }
         char letter = (char) Integer.parseInt( charStr, 16 ); // 16进制parse整形字符串。
         buffer.append( new Character( letter ).toString() );
         start = end;
         }
         return buffer.toString();
         }

   public String execute(String inputString)
   {
         Pattern    pattern = Pattern.compile("\\\\\\w{5}");
         Matcher matcher = pattern.matcher(inputString);
         int start=0;
         while (matcher.find(start)){
             String code = matcher.group();
         //    System.out.print(code + " " + slog.decodeUnicode(code));
             inputString = inputString.replace(code, decodeUnicode(code));
             start = matcher.end();
         }
        return inputString;
   }
 }

下面还有个方法也可以实现

/**
	 * 将包含unicode码的字符串转成汉字
	 * @param str
	 * @return
	 */
	public static String ascii2Native(String str) {
		StringBuilder sb = new StringBuilder();
		int begin = 0;
		int index = str.indexOf("\\u");
		while (index != -1) {
			sb.append(str.substring(begin, index));
			sb.append(ascii2Char(str.substring(index, index + 6)));
			begin = index + 6;
			index = str.indexOf("\\u", begin);
		}
		sb.append(str.substring(begin));
		return sb.toString();
	}

	/**
	 * 将单个unicode转成汉字
	 * @param str
	 * @return
	 */
	private static char ascii2Char(String str) {
		if (str.length() != 6) {
			throw new IllegalArgumentException(
					"Ascii string of a native character must be 6 character.");
		}
		if (!"\\u".equals(str.substring(0, 2))) {
			throw new IllegalArgumentException(
					"Ascii string of a native character must start with \"\\u\".");
		}
		String tmp = str.substring(2, 4);
		int code = Integer.parseInt(tmp, 16) << 8;
		tmp = str.substring(4, 6);
		code += Integer.parseInt(tmp, 16);
		return (char) code;
	}

js Unicode编码转换

var decToHex = function(str) {
    var res=[];
    for(var i=0;i < str.length;i++)
        res[i]=("00"+str.charCodeAt(i).toString(16)).slice(-4);
    return "\\u"+res.join("\\u");
}
var hexToDec = function(str) {
    str=str.replace(/\\/g,"%");
    return unescape(str);
}
var str=decToHex("decToHex unicode 编码转换");
alert("编码后："+str+"\n\n解码后："+hexToDec(str));