Java编码和解码Unicode

package zack;

public class UnicodeUtil {
    //解码
    public static String unicodetoString(String unicode) {
        if (unicode == null || "".equals(unicode)) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        int i = -1;
        int pos = 0;
        while ((i = unicode.indexOf("\\u", pos)) != -1) {
            sb.append(unicode.substring(pos, i));
            if (i + 5 < unicode.length()) {
                pos = i + 6;
                sb.append((char) Integer.parseInt(unicode.substring(i + 2, i + 6), 16));
            }
        }
        return sb.toString();
    }
    //编码
    public static String stringtoUnicode(String string) {
        if (string == null || "".equals(string)) {
            return null;
        }
        StringBuffer unicode = new StringBuffer();
        for (int i = 0; i < string.length(); i++) {
            char c = string.charAt(i);
            unicode.append("\\u" + Integer.toHexString(c));
        }
        return unicode.toString();
    }

    public static void main(String[] args) {  
        // TODO Auto-generated method stub  
        String s = stringtoUnicode("测试");  
        System.out.println("编码："+s);  
        String s1 = unicodetoString(s);  
        System.out.println("解码："+s1);  

    }  
}