java Unicode转码

    //中文转UNICODE
    public static String chinaToUnicode(String str) {
        String result = "";
        for (int i = 0; i < str.length(); i++) {
            int chr1 = (char) str.charAt(i);
            if (chr1 >= 19968 && chr1 <= 171941) {// 汉字范围 \u4e00-\u9fa5 (中文)
                result += "\\u" + Integer.toHexString(chr1);
            } else {
                result += str.charAt(i);
            }
        }
        return result;
    }

    //UNICODE转中文
    public static String unicodeToChina(String str) throws Exception{
        byte[] byteArr = str.getBytes("UTF-8");
        String chinese=new String(byteArr,"UTF-8");
        return chinese;
    }