/**

      * unicode编码转换为汉字

      * @param unicodeStr 待转化的编码

      * @return 返回转化后的汉子

      */

     public static String UnicodeToCN(String unicodeStr) {

         Pattern pattern = Pattern.compile("(\\\\u(\\p{XDigit}{4}))");

         Matcher matcher = pattern.matcher(unicodeStr);

         char ch;

         while (matcher.find()) {

             //group

             String group = matcher.group(2);

             //ch:'李四'

             ch = (char) Integer.parseInt(group, 16);

             //group1

             String group1 = matcher.group(1);

             unicodeStr = unicodeStr.replace(group1, ch + "");

         }

         return unicodeStr.replace("\\", "").trim();

     }

/**

     * 汉字转化为Unicode编码

     * @param CN 待转化的中文

     * @return 返回转化之后的unicode编码

     */

    public static String CNToUnicode(String CN) {

        try {

            StringBuffer out = new StringBuffer("");

            //直接获取字符串的unicode二进制

            byte[] bytes = CN.getBytes("unicode");

            //然后将其byte转换成对应的16进制表示即可

            for (int i = 0; i < bytes.length - 1; i += 2) {

                out.append("\\u");

                String str = Integer.toHexString(bytes[i + 1] & 0xff);

                for (int j = str.length(); j < 2; j++) {

                    out.append("0");

                }

                String str1 = Integer.toHexString(bytes[i] & 0xff);

                out.append(str1);

                out.append(str);

            }

            return out.toString();

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

            return null;

        }

 public static void main(String[] args) {

         String Unicodestr = "\\u674e\\u56db";

         System.out.println("unicode为\\u674e\\u56db对应的中文是："+Util.UnicodeToCN(Unicodestr));

         String CNStr = "李四";

         System.out.println("李四对应的Unicode编码是："+Util.CNToUnicode(CNStr));

     }