1.前台JS
1 <script type="text/javascript"> 2 $(function() { 3 $("#btn").click(function() { 4 var username = encode64($("#username").val()); //对数据加密 5 var password = encode64($("#password").val()); 6 $("#username").val(username); 7 $("#password").val(password); 8 document.fm.submit(); //fm为form表单name 9 }) 10 }) 11 12 // base64加密开始 13 var keyStr = "ABCDEFGHIJKLMNOP" + "QRSTUVWXYZabcdef" + "ghijklmnopqrstuv" 14 + "wxyz0123456789+/" + "="; 15 16 function encode64(input) { 17 18 var output = ""; 19 var chr1, chr2, chr3 = ""; 20 var enc1, enc2, enc3, enc4 = ""; 21 var i = 0; 22 do { 23 chr1 = input.charCodeAt(i++); 24 chr2 = input.charCodeAt(i++); 25 chr3 = input.charCodeAt(i++); 26 enc1 = chr1 >> 2; 27 enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); 28 enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); 29 enc4 = chr3 & 63; 30 if (isNaN(chr2)) { 31 enc3 = enc4 = 64; 32 } else if (isNaN(chr3)) { 33 enc4 = 64; 34 } 35 output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) 36 + keyStr.charAt(enc3) + keyStr.charAt(enc4); 37 chr1 = chr2 = chr3 = ""; 38 enc1 = enc2 = enc3 = enc4 = ""; 39 } while (i < input.length); 40 41 return output; 42 } 43 // base64加密结束 44 </script>
2、后台java代码
1 private static char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D', 2 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 3 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 4 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 5 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', 6 '4', '5', '6', '7', '8', '9', '+', '/', }; 7 8 private static byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1, 9 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 11 -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 12 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 13 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, 14 -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 15 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, 16 -1, -1 }; 17 18 /** 19 * 解密 20 * @param str 21 * @return 22 */ 23 public static byte[] decode(String str) { 24 byte[] data = str.getBytes(); 25 int len = data.length; 26 ByteArrayOutputStream buf = new ByteArrayOutputStream(len); 27 int i = 0; 28 int b1, b2, b3, b4; 29 30 while (i < len) { 31 do { 32 b1 = base64DecodeChars[data[i++]]; 33 } while (i < len && b1 == -1); 34 if (b1 == -1) { 35 break; 36 } 37 38 do { 39 b2 = base64DecodeChars[data[i++]]; 40 } while (i < len && b2 == -1); 41 if (b2 == -1) { 42 break; 43 } 44 buf.write((int) ((b1 << 2) | ((b2 & 0x30) >>> 4))); 45 46 do { 47 b3 = data[i++]; 48 if (b3 == 61) { 49 return buf.toByteArray(); 50 } 51 b3 = base64DecodeChars[b3]; 52 } while (i < len && b3 == -1); 53 if (b3 == -1) { 54 break; 55 } 56 buf.write((int) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2))); 57 58 do { 59 b4 = data[i++]; 60 if (b4 == 61) { 61 return buf.toByteArray(); 62 } 63 b4 = base64DecodeChars[b4]; 64 } while (i < len && b4 == -1); 65 if (b4 == -1) { 66 break; 67 } 68 buf.write((int) (((b3 & 0x03) << 6) | b4)); 69 } 70 return buf.toByteArray(); 71 } 72 73 74 System.out.println(new String(decode(username))); // 使用decode()方法进行解密
