js和java转码

转为ASCII形式：

Java代码

 

String str="你是";
  try {
   System.out.println(URLEncoder.encode(str, "UTF-8"));  //结果为你是
   System.out.println(URLDecoder.decode("你是","UTF-8"));  //结果为你是     这个里面的字符为URLEncoder.encode(str, "UTF-8")产生
   System.out.println(URLDecoder.decode("你是","UTF-8"));  //结果为你是     这个里面的字符为javascript中encodeURI('你是')产生
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  }

HTML中的Js代码：

 <script type="text/javascript">
   function test_encodeURI(){
   alert(encodeURI('你是')); // 到jsp页面中解码的话用URLDecoder.decode即可，具体参看类URLEncodeTest.java
   document.write(encodeURI('你是')+"<br>");
   alert(decodeURI('你是')); // encodeURIComponent
   document.write(encodeURI('www.cup.edu.cn')+"<br>");
   document.write(encodeURIComponent('http://www.cup.edu.cn')+"<br>");   //http://www.cup.edu.cn
   document.write(decodeURI('www.cup.edu.cn')+"<br>");
   document.write(decodeURIComponent('http://www.cup.edu.cn')+"<br>");  //http://www.cup.edu.cn
   }
</script>

<script type="text/javascript">

        var GB2312UnicodeConverter = {

            ToUnicode:function (str) {

                return escape(str).toLocaleLowerCase().replace(/%u/gi,'\\u');

            }

            , ToGB2312: function (str) {

                return unescape(str.replace(/\\u/gi,'%u'));

            }

        };

 

        var str = '上海', unicode;

        document.write(str + '<br/>');

        unicode = GB2312UnicodeConverter.ToUnicode(str);

        document.write('汉字转换为Unicode代码：' + unicode + '<br/><br/>');

        document.write('Unicode代码转换为汉字：' + GB2312UnicodeConverter.ToGB2312(unicode));

    </script>

　　

?

/// <summary>

        /// 汉字转换为Unicode编码

        /// </summary>

        /// <param name="str">要编码的汉字字符串</param>

        /// <returns>Unicode编码的的字符串</returns>

        public static string ToUnicode(string str)

        {

            byte[] bts = Encoding.Unicode.GetBytes(str);

            string r = "";

            for (int i = 0; i < bts.Length; i += 2) r += "\\u" + bts[i + 1].ToString("x").PadLeft(2,'0') + bts[i].ToString("x").PadLeft(2,'0');

            return r;

        }

        /// <summary>

        /// 将Unicode编码转换为汉字字符串

        /// </summary>

        /// <param name="str">Unicode编码字符串</param>

        /// <returns>汉字字符串</returns>

        public static string ToGB2312(string str)

        {

            string r = "";

            MatchCollection mc = Regex.Matches(str, @"\\u([\w]{2})([\w]{2})", RegexOptions.Compiled | RegexOptions.IgnoreCase);

            byte[] bts = new byte[2];

            foreach (Match m in mc)

            {

                bts[0] = (byte)int.Parse(m.Groups[2].Value, NumberStyles.HexNumber);

                bts[1] = (byte)int.Parse(m.Groups[1].Value, NumberStyles.HexNumber);

                r += Encoding.Unicode.GetString(bts);

            }

            return r;

        }