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+"

解码后："+hexToDec(str));