Ajax中文參數亂碼解決方案

方案一
================
[頁面傳參方式:]
例: "aaa.do?val="+encodeURI(encodeURI("要傳的值"))
[參數擷取方式:]
String val=request.getParameter("val");
val=java.net.URLDecoder.decode(val,"utf-8");

方案二
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[頁面傳參方式:]
例: "aaa.do?val="+escape(escape("要傳的值"))
[參數擷取方式:]
String val=request.getParameter("val");
val=Escape.unescape(val);

其中:Escape的實現如下:
public class Escape {
    private final static String[] hex = { "00", "01", "02", "03", "04", "05",   
            "06", "07", "08", "09", "0A", "0B", "0C", "0D", "0E", "0F", "10",   
     "11", "12", "13", "14", "15", "16", "17", "18", "19", "1A", "1B",   
     "1C", "1D", "1E", "1F", "20", "21", "22", "23", "24", "25", "26",   
     "27", "28", "29", "2A", "2B", "2C", "2D", "2E", "2F", "30", "31",   
     "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C",   
     "3D", "3E", "3F", "40", "41", "42", "43", "44", "45", "46", "47",   
     "48", "49", "4A", "4B", "4C", "4D", "4E", "4F", "50", "51", "52",   
     "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D",   
     "5E", "5F", "60", "61", "62", "63", "64", "65", "66", "67", "68",   
     "69", "6A", "6B", "6C", "6D", "6E", "6F", "70", "71", "72", "73",   
     "74", "75", "76", "77", "78", "79", "7A", "7B", "7C", "7D", "7E",   
     "7F", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89",   
     "8A", "8B", "8C", "8D", "8E", "8F", "90", "91", "92", "93", "94",   
     "95", "96", "97", "98", "99", "9A", "9B", "9C", "9D", "9E", "9F",   
     "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "AA",   
     "AB", "AC", "AD", "AE", "AF", "B0", "B1", "B2", "B3", "B4", "B5",   
     "B6", "B7", "B8", "B9", "BA", "BB", "BC", "BD", "BE", "BF", "C0",   
     "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "CA", "CB",   
     "CC", "CD", "CE", "CF", "D0", "D1", "D2", "D3", "D4", "D5", "D6",   
     "D7", "D8", "D9", "DA", "DB", "DC", "DD", "DE", "DF", "E0", "E1",   
     "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "EA", "EB", "EC",   
     "ED", "EE", "EF", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7",   
     "F8", "F9", "FA", "FB", "FC", "FD", "FE", "FF" }; 
 
    private final static byte[] val = { 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x00, 0x01,   
   0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,   
   0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F };    

    public static String escape(String s) {   
        StringBuffer sbuf = new StringBuffer();   
  int len = s.length();   
  for (int i = 0; i < len; i++) {   
      int ch = s.charAt(i);   
      if ('A' <= ch && ch <= 'Z') {   
          sbuf.append((char) ch);   
      } else if ('a' <= ch && ch <= 'z') {   
          sbuf.append((char) ch);   
      } else if ('0' <= ch && ch <= '9') {          
          sbuf.append((char) ch);   
      } else if (ch == '-' || ch == '_' || ch == '.'
                               || ch == '!' || ch == '~' || ch == '*'   
                 || ch == '/'' || ch == '(' || ch == ')') {   
          sbuf.append((char) ch);   
      } else if (ch <= 0x007F) {   
          sbuf.append('%');   
          sbuf.append(hex[ch]);   
      } else {   
          sbuf.append('%');   
          sbuf.append('u');   
          sbuf.append(hex[(ch >>> 8)]);   
          sbuf.append(hex[(0x00FF & ch)]);   
      }   
     }   
  return sbuf.toString();   
    }
    public static String unescape(String s) {
        StringBuffer sbuf = new StringBuffer();
        int i = 0;
        int len = s.length();
        while (i < len) {
            int ch = s.charAt(i);
            if (ch == '+') {                        // + : map to ' '
                sbuf.append(' ');
            } else if ('A' <= ch && ch <= 'Z') {    // 'A'..'Z' : as it was
                sbuf.append((char)ch);
            } else if ('a' <= ch && ch <= 'z') {    // 'a'..'z' : as it was
                sbuf.append((char)ch);
            } else if ('0' <= ch && ch <= '9') {    // '0'..'9' : as it was
                sbuf.append((char)ch);
            } else if (ch == '-' || ch == '_'       // unreserved : as it was
                || ch == '.' || ch == '!'
                || ch == '~' || ch == '*'
                || ch == '/'' || ch == '('
                || ch == ')') {
                sbuf.append((char)ch);
            } else if (ch == '%') {
                int cint = 0;
                if ('u' != s.charAt(i+1)) {         // %XX : map to ascii(XX)
                    cint = (cint << 4) | val[s.charAt(i+1)];
                    cint = (cint << 4) | val[s.charAt(i+2)];
                    i+=2;
                } else {                            // %uXXXX : map to unicode(XXXX)
                    cint = (cint << 4) | val[s.charAt(i+2)];
                    cint = (cint << 4) | val[s.charAt(i+3)];
                    cint = (cint << 4) | val[s.charAt(i+4)];
                    cint = (cint << 4) | val[s.charAt(i+5)];
                    i+=5;
                }
                sbuf.append((char)cint);
            }
            i++;
        }
        return sbuf.toString();
    }
}

將上述實現作為一個類加入項目中去，之後調用其unescape方法，即可完成解碼;

以上兩種方案,推薦第一種，原因很簡單，就是:他是通過js自身的函數和java自身的API來完成功能的，不涉及第三方的類，更為安全可靠。