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;
        }