造成这个现象的原因是：js加密前未对中文字符进行UTF-8转码；
解决方案1：
直接使用CryptoJS的MD5包加密即可：
下载地址：https://code.google.com/archive/p/crypto-js/downloads
console.log('hex_md5', CryptoJS.MD5('加密字符').toString());
解决方案2：
直接使用下面的JS代码进行加密即可：
1 function md5(string) { 2 function md5_RotateLeft(lValue, iShiftBits) { 3 return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits)); 4 } 5 6 function md5_AddUnsigned(lX, lY) { 7 var lX4, lY4, lX8, lY8, lResult; 8 lX8 = (lX & 0x80000000); 9 lY8 = (lY & 0x80000000); 10 lX4 = (lX & 0x40000000); 11 lY4 = (lY & 0x40000000); 12 lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF); 13 if (lX4 & lY4) { 14 return (lResult ^ 0x80000000 ^ lX8 ^ lY8); 15 } 16 if (lX4 | lY4) { 17 if (lResult & 0x40000000) { 18 return (lResult ^ 0xC0000000 ^ lX8 ^ lY8); 19 } else { 20 return (lResult ^ 0x40000000 ^ lX8 ^ lY8); 21 } 22 } else { 23 return (lResult ^ lX8 ^ lY8); 24 } 25 } 26 27 function md5_F(x, y, z) { 28 return (x & y) | ((~x) & z); 29 } 30 31 function md5_G(x, y, z) { 32 return (x & z) | (y & (~z)); 33 } 34 35 function md5_H(x, y, z) { 36 return (x ^ y ^ z); 37 } 38 39 function md5_I(x, y, z) { 40 return (y ^ (x | (~z))); 41 } 42 43 function md5_FF(a, b, c, d, x, s, ac) { 44 a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_F(b, c, d), x), ac)); 45 return md5_AddUnsigned(md5_RotateLeft(a, s), b); 46 }; 47 48 function md5_GG(a, b, c, d, x, s, ac) { 49 a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_G(b, c, d), x), ac)); 50 return md5_AddUnsigned(md5_RotateLeft(a, s), b); 51 }; 52 53 function md5_HH(a, b, c, d, x, s, ac) { 54 a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_H(b, c, d), x), ac)); 55 return md5_AddUnsigned(md5_RotateLeft(a, s), b); 56 }; 57 58 function md5_II(a, b, c, d, x, s, ac) { 59 a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_I(b, c, d), x), ac)); 60 return md5_AddUnsigned(md5_RotateLeft(a, s), b); 61 }; 62 63 function md5_ConvertToWordArray(string) { 64 var lWordCount; 65 var lMessageLength = string.length; 66 var lNumberOfWords_temp1 = lMessageLength + 8; 67 var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64; 68 var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16; 69 var lWordArray = Array(lNumberOfWords - 1); 70 var lBytePosition = 0; 71 var lByteCount = 0; 72 while (lByteCount < lMessageLength) { 73 lWordCount = (lByteCount - (lByteCount % 4)) / 4; 74 lBytePosition = (lByteCount % 4) * 8; 75 lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition)); 76 lByteCount++; 77 } 78 lWordCount = (lByteCount - (lByteCount % 4)) / 4; 79 lBytePosition = (lByteCount % 4) * 8; 80 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition); 81 lWordArray[lNumberOfWords - 2] = lMessageLength << 3; 82 lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29; 83 return lWordArray; 84 }; 85 86 function md5_WordToHex(lValue) { 87 var WordToHexValue = "", 88 WordToHexValue_temp = "", 89 lByte, lCount; 90 for (lCount = 0; lCount <= 3; lCount++) { 91 lByte = (lValue >>> (lCount * 8)) & 255; 92 WordToHexValue_temp = "0" + lByte.toString(16); 93 WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2); 94 } 95 return WordToHexValue; 96 }; 97 98 function md5_Utf8Encode(string) { 99 string = string.replace(/\r\n/g, "\n"); 100 var utftext = ""; 101 for (var n = 0; n < string.length; n++) { 102 var c = string.charCodeAt(n); 103 if (c < 128) { 104 utftext += String.fromCharCode(c); 105 } else if ((c > 127) && (c < 2048)) { 106 utftext += String.fromCharCode((c >> 6) | 192); 107 utftext += String.fromCharCode((c & 63) | 128); 108 } else { 109 utftext += String.fromCharCode((c >> 12) | 224); 110 utftext += String.fromCharCode(((c >> 6) & 63) | 128); 111 utftext += String.fromCharCode((c & 63) | 128); 112 } 113 } 114 return utftext; 115 }; 116 var x = Array(); 117 var k, AA, BB, CC, DD, a, b, c, d; 118 var S11 = 7, 119 S12 = 12, 120 S13 = 17, 121 S14 = 22; 122 var S21 = 5, 123 S22 = 9, 124 S23 = 14, 125 S24 = 20; 126 var S31 = 4, 127 S32 = 11, 128 S33 = 16, 129 S34 = 23; 130 var S41 = 6, 131 S42 = 10, 132 S43 = 15, 133 S44 = 21; 134 string = md5_Utf8Encode(string); 135 x = md5_ConvertToWordArray(string); 136 a = 0x67452301; 137 b = 0xEFCDAB89; 138 c = 0x98BADCFE; 139 d = 0x10325476; 140 for (k = 0; k < x.length; k += 16) { 141 AA = a; 142 BB = b; 143 CC = c; 144 DD = d; 145 a = md5_FF(a, b, c, d, x[k + 0], S11, 0xD76AA478); 146 d = md5_FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756); 147 c = md5_FF(c, d, a, b, x[k + 2], S13, 0x242070DB); 148 b = md5_FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE); 149 a = md5_FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF); 150 d = md5_FF(d, a, b, c, x[k + 5], S12, 0x4787C62A); 151 c = md5_FF(c, d, a, b, x[k + 6], S13, 0xA8304613); 152 b = md5_FF(b, c, d, a, x[k + 7], S14, 0xFD469501); 153 a = md5_FF(a, b, c, d, x[k + 8], S11, 0x698098D8); 154 d = md5_FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF); 155 c = md5_FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1); 156 b = md5_FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE); 157 a = md5_FF(a, b, c, d, x[k + 12], S11, 0x6B901122); 158 d = md5_FF(d, a, b, c, x[k + 13], S12, 0xFD987193); 159 c = md5_FF(c, d, a, b, x[k + 14], S13, 0xA679438E); 160 b = md5_FF(b, c, d, a, x[k + 15], S14, 0x49B40821); 161 a = md5_GG(a, b, c, d, x[k + 1], S21, 0xF61E2562); 162 d = md5_GG(d, a, b, c, x[k + 6], S22, 0xC040B340); 163 c = md5_GG(c, d, a, b, x[k + 11], S23, 0x265E5A51); 164 b = md5_GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA); 165 a = md5_GG(a, b, c, d, x[k + 5], S21, 0xD62F105D); 166 d = md5_GG(d, a, b, c, x[k + 10], S22, 0x2441453); 167 c = md5_GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681); 168 b = md5_GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8); 169 a = md5_GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6); 170 d = md5_GG(d, a, b, c, x[k + 14], S22, 0xC33707D6); 171 c = md5_GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87); 172 b = md5_GG(b, c, d, a, x[k + 8], S24, 0x455A14ED); 173 a = md5_GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905); 174 d = md5_GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8); 175 c = md5_GG(c, d, a, b, x[k + 7], S23, 0x676F02D9); 176 b = md5_GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A); 177 a = md5_HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942); 178 d = md5_HH(d, a, b, c, x[k + 8], S32, 0x8771F681); 179 c = md5_HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122); 180 b = md5_HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C); 181 a = md5_HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44); 182 d = md5_HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9); 183 c = md5_HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60); 184 b = md5_HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70); 185 a = md5_HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6); 186 d = md5_HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA); 187 c = md5_HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085); 188 b = md5_HH(b, c, d, a, x[k + 6], S34, 0x4881D05); 189 a = md5_HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039); 190 d = md5_HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5); 191 c = md5_HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8); 192 b = md5_HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665); 193 a = md5_II(a, b, c, d, x[k + 0], S41, 0xF4292244); 194 d = md5_II(d, a, b, c, x[k + 7], S42, 0x432AFF97); 195 c = md5_II(c, d, a, b, x[k + 14], S43, 0xAB9423A7); 196 b = md5_II(b, c, d, a, x[k + 5], S44, 0xFC93A039); 197 a = md5_II(a, b, c, d, x[k + 12], S41, 0x655B59C3); 198 d = md5_II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92); 199 c = md5_II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D); 200 b = md5_II(b, c, d, a, x[k + 1], S44, 0x85845DD1); 201 a = md5_II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F); 202 d = md5_II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0); 203 c = md5_II(c, d, a, b, x[k + 6], S43, 0xA3014314); 204 b = md5_II(b, c, d, a, x[k + 13], S44, 0x4E0811A1); 205 a = md5_II(a, b, c, d, x[k + 4], S41, 0xF7537E82); 206 d = md5_II(d, a, b, c, x[k + 11], S42, 0xBD3AF235); 207 c = md5_II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB); 208 b = md5_II(b, c, d, a, x[k + 9], S44, 0xEB86D391); 209 a = md5_AddUnsigned(a, AA); 210 b = md5_AddUnsigned(b, BB); 211 c = md5_AddUnsigned(c, CC); 212 d = md5_AddUnsigned(d, DD); 213 } 214 return (md5_WordToHex(a) + md5_WordToHex(b) + md5_WordToHex(c) + md5_WordToHex(d)).toLowerCase(); 215 }