【前端】js前端加密，java后端解密详解

我会带着你远行 2022-12-05 10:27 250阅读 0赞

### 前端js ###

*  前端 aes.min.js 压缩文件
    
        !function(t,n){
              "object"==typeof exports?module.exports=exports=n():"function"==typeof define&&define.amd?define([],n):t.CryptoJS=n()}(this,function(){
              var t=t||function(t,n){
              var i=Object.create||function(){
              function t(){
              }return function(n){
              var i;return t.prototype=n,i=new t,t.prototype=null,i}}(),e={
              },r=e.lib={
              },o=r.Base=function(){
              return{
              extend:function(t){
              var n=i(this);return t&&n.mixIn(t),n.hasOwnProperty("init")&&this.init!==n.init||(n.init=function(){
              n.$super.init.apply(this,arguments)}),n.init.prototype=n,n.$super=this,n},create:function(){
              var t=this.extend();return t.init.apply(t,arguments),t},init:function(){
              },mixIn:function(t){
              for(var n in t)t.hasOwnProperty(n)&&(this[n]=t[n]);t.hasOwnProperty("toString")&&(this.toString=t.toString)},clone:function(){
              return this.init.prototype.extend(this)}}}(),s=r.WordArray=o.extend({
              init:function(t,i){
              t=this.words=t||[],i!=n?this.sigBytes=i:this.sigBytes=4*t.length},toString:function(t){
              return(t||c).stringify(this)},concat:function(t){
              var n=this.words,i=t.words,e=this.sigBytes,r=t.sigBytes;if(this.clamp(),e%4)for(var o=0;o<r;o++){
              var s=i[o>>>2]>>>24-o%4*8&255;n[e+o>>>2]|=s<<24-(e+o)%4*8}else for(var o=0;o<r;o+=4)n[e+o>>>2]=i[o>>>2];return this.sigBytes+=r,this},clamp:function(){
              var n=this.words,i=this.sigBytes;n[i>>>2]&=4294967295<<32-i%4*8,n.length=t.ceil(i/4)},clone:function(){
              var t=o.clone.call(this);return t.words=this.words.slice(0),t},random:function(n){
              for(var i,e=[],r=function(n){
              var n=n,i=987654321,e=4294967295;return function(){
              i=36969*(65535&i)+(i>>16)&e,n=18e3*(65535&n)+(n>>16)&e;var r=(i<<16)+n&e;return r/=4294967296,r+=.5,r*(t.random()>.5?1:-1)}},o=0;o<n;o+=4){
              var a=r(4294967296*(i||t.random()));i=987654071*a(),e.push(4294967296*a()|0)}return new s.init(e,n)}}),a=e.enc={
              },c=a.Hex={
              stringify:function(t){
              for(var n=t.words,i=t.sigBytes,e=[],r=0;r<i;r++){
              var o=n[r>>>2]>>>24-r%4*8&255;e.push((o>>>4).toString(16)),e.push((15&o).toString(16))}return e.join("")},parse:function(t){
              for(var n=t.length,i=[],e=0;e<n;e+=2)i[e>>>3]|=parseInt(t.substr(e,2),16)<<24-e%8*4;return new s.init(i,n/2)}},u=a.Latin1={
              stringify:function(t){
              for(var n=t.words,i=t.sigBytes,e=[],r=0;r<i;r++){
              var o=n[r>>>2]>>>24-r%4*8&255;e.push(String.fromCharCode(o))}return e.join("")},parse:function(t){
              for(var n=t.length,i=[],e=0;e<n;e++)i[e>>>2]|=(255&t.charCodeAt(e))<<24-e%4*8;return new s.init(i,n)}},f=a.Utf8={
              stringify:function(t){
              try{
              return decodeURIComponent(escape(u.stringify(t)))}catch(t){
              throw new Error("Malformed UTF-8 data")}},parse:function(t){
              return u.parse(unescape(encodeURIComponent(t)))}},h=r.BufferedBlockAlgorithm=o.extend({
              reset:function(){
              this._data=new s.init,this._nDataBytes=0},_append:function(t){
              "string"==typeof t&&(t=f.parse(t)),this._data.concat(t),this._nDataBytes+=t.sigBytes},_process:function(n){
              var i=this._data,e=i.words,r=i.sigBytes,o=this.blockSize,a=4*o,c=r/a;c=n?t.ceil(c):t.max((0|c)-this._minBufferSize,0);var u=c*o,f=t.min(4*u,r);if(u){
              for(var h=0;h<u;h+=o)this._doProcessBlock(e,h);var p=e.splice(0,u);i.sigBytes-=f}return new s.init(p,f)},clone:function(){
              var t=o.clone.call(this);return t._data=this._data.clone(),t},_minBufferSize:0}),p=(r.Hasher=h.extend({
              cfg:o.extend(),init:function(t){
              this.cfg=this.cfg.extend(t),this.reset()},reset:function(){
              h.reset.call(this),this._doReset()},update:function(t){
              return this._append(t),this._process(),this},finalize:function(t){
              t&&this._append(t);var n=this._doFinalize();return n},blockSize:16,_createHelper:function(t){
              return function(n,i){
              return new t.init(i).finalize(n)}},_createHmacHelper:function(t){
              return function(n,i){
              return new p.HMAC.init(t,i).finalize(n)}}}),e.algo={
              });return e}(Math);return t});
        //# sourceMappingURL=core.min.js.map
        !function(e,t,i){
              "object"==typeof exports?module.exports=exports=t(require("./core.min"),require("./sha1.min"),require("./hmac.min")):"function"==typeof define&&define.amd?define(["./core.min","./sha1.min","./hmac.min"],t):t(e.CryptoJS)}(this,function(e){
              return function(){
              var t=e,i=t.lib,r=i.Base,n=i.WordArray,o=t.algo,a=o.MD5,c=o.EvpKDF=r.extend({
              cfg:r.extend({
              keySize:4,hasher:a,iterations:1}),init:function(e){
              this.cfg=this.cfg.extend(e)},compute:function(e,t){
              for(var i=this.cfg,r=i.hasher.create(),o=n.create(),a=o.words,c=i.keySize,f=i.iterations;a.length<c;){
              s&&r.update(s);var s=r.update(e).finalize(t);r.reset();for(var u=1;u<f;u++)s=r.finalize(s),r.reset();o.concat(s)}return o.sigBytes=4*c,o}});t.EvpKDF=function(e,t,i){
              return c.create(i).compute(e,t)}}(),e.EvpKDF});
        //# sourceMappingURL=evpkdf.min.js.map
        !function(r,e){
              "object"==typeof exports?module.exports=exports=e(require("./core.min")):"function"==typeof define&&define.amd?define(["./core.min"],e):e(r.CryptoJS)}(this,function(r){
              return function(){
              function e(r,e,t){
              for(var n=[],i=0,o=0;o<e;o++)if(o%4){
              var f=t[r.charCodeAt(o-1)]<<o%4*2,c=t[r.charCodeAt(o)]>>>6-o%4*2;n[i>>>2]|=(f|c)<<24-i%4*8,i++}return a.create(n,i)}var t=r,n=t.lib,a=n.WordArray,i=t.enc;i.Base64={
              stringify:function(r){
              var e=r.words,t=r.sigBytes,n=this._map;r.clamp();for(var a=[],i=0;i<t;i+=3)for(var o=e[i>>>2]>>>24-i%4*8&255,f=e[i+1>>>2]>>>24-(i+1)%4*8&255,c=e[i+2>>>2]>>>24-(i+2)%4*8&255,s=o<<16|f<<8|c,h=0;h<4&&i+.75*h<t;h++)a.push(n.charAt(s>>>6*(3-h)&63));var p=n.charAt(64);if(p)for(;a.length%4;)a.push(p);return a.join("")},parse:function(r){
              var t=r.length,n=this._map,a=this._reverseMap;if(!a){
              a=this._reverseMap=[];for(var i=0;i<n.length;i++)a[n.charCodeAt(i)]=i}var o=n.charAt(64);if(o){
              var f=r.indexOf(o);f!==-1&&(t=f)}return e(r,t,a)},_map:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="}}(),r.enc.Base64});
        //# sourceMappingURL=enc-base64.min.js.map
        !function(e,t,r){
              "object"==typeof exports?module.exports=exports=t(require("./core.min"),require("./evpkdf.min")):"function"==typeof define&&define.amd?define(["./core.min","./evpkdf.min"],t):t(e.CryptoJS)}(this,function(e){
              e.lib.Cipher||function(t){
              var r=e,i=r.lib,n=i.Base,c=i.WordArray,o=i.BufferedBlockAlgorithm,s=r.enc,a=(s.Utf8,s.Base64),f=r.algo,p=f.EvpKDF,d=i.Cipher=o.extend({
              cfg:n.extend(),createEncryptor:function(e,t){
              return this.create(this._ENC_XFORM_MODE,e,t)},createDecryptor:function(e,t){
              return this.create(this._DEC_XFORM_MODE,e,t)},init:function(e,t,r){
              this.cfg=this.cfg.extend(r),this._xformMode=e,this._key=t,this.reset()},reset:function(){
              o.reset.call(this),this._doReset()},process:function(e){
              return this._append(e),this._process()},finalize:function(e){
              e&&this._append(e);var t=this._doFinalize();return t},keySize:4,ivSize:4,_ENC_XFORM_MODE:1,_DEC_XFORM_MODE:2,_createHelper:function(){
              function e(e){
              return"string"==typeof e?B:x}return function(t){
              return{
              encrypt:function(r,i,n){
              return e(i).encrypt(t,r,i,n)},decrypt:function(r,i,n){
              return e(i).decrypt(t,r,i,n)}}}}()}),h=(i.StreamCipher=d.extend({
              _doFinalize:function(){
              var e=this._process(!0);return e},blockSize:1}),r.mode={
              }),u=i.BlockCipherMode=n.extend({
              createEncryptor:function(e,t){
              return this.Encryptor.create(e,t)},createDecryptor:function(e,t){
              return this.Decryptor.create(e,t)},init:function(e,t){
              this._cipher=e,this._iv=t}}),l=h.CBC=function(){
              function e(e,r,i){
              var n=this._iv;if(n){
              var c=n;this._iv=t}else var c=this._prevBlock;for(var o=0;o<i;o++)e[r+o]^=c[o]}var r=u.extend();return r.Encryptor=r.extend({
              processBlock:function(t,r){
              var i=this._cipher,n=i.blockSize;e.call(this,t,r,n),i.encryptBlock(t,r),this._prevBlock=t.slice(r,r+n)}}),r.Decryptor=r.extend({
              processBlock:function(t,r){
              var i=this._cipher,n=i.blockSize,c=t.slice(r,r+n);i.decryptBlock(t,r),e.call(this,t,r,n),this._prevBlock=c}}),r}(),_=r.pad={
              },v=_.Pkcs7={
              pad:function(e,t){
              for(var r=4*t,i=r-e.sigBytes%r,n=i<<24|i<<16|i<<8|i,o=[],s=0;s<i;s+=4)o.push(n);var a=c.create(o,i);e.concat(a)},unpad:function(e){
              var t=255&e.words[e.sigBytes-1>>>2];e.sigBytes-=t}},y=(i.BlockCipher=d.extend({
              cfg:d.cfg.extend({
              mode:l,padding:v}),reset:function(){
              d.reset.call(this);var e=this.cfg,t=e.iv,r=e.mode;if(this._xformMode==this._ENC_XFORM_MODE)var i=r.createEncryptor;else{
              var i=r.createDecryptor;this._minBufferSize=1}this._mode&&this._mode.__creator==i?this._mode.init(this,t&&t.words):(this._mode=i.call(r,this,t&&t.words),this._mode.__creator=i)},_doProcessBlock:function(e,t){
              this._mode.processBlock(e,t)},_doFinalize:function(){
              var e=this.cfg.padding;if(this._xformMode==this._ENC_XFORM_MODE){
              e.pad(this._data,this.blockSize);var t=this._process(!0)}else{
              var t=this._process(!0);e.unpad(t)}return t},blockSize:4}),i.CipherParams=n.extend({
              init:function(e){
              this.mixIn(e)},toString:function(e){
              return(e||this.formatter).stringify(this)}})),m=r.format={
              },k=m.OpenSSL={
              stringify:function(e){
              var t=e.ciphertext,r=e.salt;if(r)var i=c.create([1398893684,1701076831]).concat(r).concat(t);else var i=t;return i.toString(a)},parse:function(e){
              var t=a.parse(e),r=t.words;if(1398893684==r[0]&&1701076831==r[1]){
              var i=c.create(r.slice(2,4));r.splice(0,4),t.sigBytes-=16}return y.create({
              ciphertext:t,salt:i})}},x=i.SerializableCipher=n.extend({
              cfg:n.extend({
              format:k}),encrypt:function(e,t,r,i){
              i=this.cfg.extend(i);var n=e.createEncryptor(r,i),c=n.finalize(t),o=n.cfg;return y.create({
              ciphertext:c,key:r,iv:o.iv,algorithm:e,mode:o.mode,padding:o.padding,blockSize:e.blockSize,formatter:i.format})},decrypt:function(e,t,r,i){
              i=this.cfg.extend(i),t=this._parse(t,i.format);var n=e.createDecryptor(r,i).finalize(t.ciphertext);return n},_parse:function(e,t){
              return"string"==typeof e?t.parse(e,this):e}}),g=r.kdf={
              },S=g.OpenSSL={
              execute:function(e,t,r,i){
              i||(i=c.random(8));var n=p.create({
              keySize:t+r}).compute(e,i),o=c.create(n.words.slice(t),4*r);return n.sigBytes=4*t,y.create({
              key:n,iv:o,salt:i})}},B=i.PasswordBasedCipher=x.extend({
              cfg:x.cfg.extend({
              kdf:S}),encrypt:function(e,t,r,i){
              i=this.cfg.extend(i);var n=i.kdf.execute(r,e.keySize,e.ivSize);i.iv=n.iv;var c=x.encrypt.call(this,e,t,n.key,i);return c.mixIn(n),c},decrypt:function(e,t,r,i){
              i=this.cfg.extend(i),t=this._parse(t,i.format);var n=i.kdf.execute(r,e.keySize,e.ivSize,t.salt);i.iv=n.iv;var c=x.decrypt.call(this,e,t,n.key,i);return c}})}()});
        //# sourceMappingURL=cipher-core.min.js.map
        !function(e,i){
              "object"==typeof exports?module.exports=exports=i(require("./core.min")):"function"==typeof define&&define.amd?define(["./core.min"],i):i(e.CryptoJS)}(this,function(e){
              !function(){
              var i=e,t=i.lib,n=t.Base,s=i.enc,r=s.Utf8,o=i.algo;o.HMAC=n.extend({
              init:function(e,i){
              e=this._hasher=new e.init,"string"==typeof i&&(i=r.parse(i));var t=e.blockSize,n=4*t;i.sigBytes>n&&(i=e.finalize(i)),i.clamp();for(var s=this._oKey=i.clone(),o=this._iKey=i.clone(),a=s.words,f=o.words,c=0;c<t;c++)a[c]^=1549556828,f[c]^=909522486;s.sigBytes=o.sigBytes=n,this.reset()},reset:function(){
              var e=this._hasher;e.reset(),e.update(this._iKey)},update:function(e){
              return this._hasher.update(e),this},finalize:function(e){
              var i=this._hasher,t=i.finalize(e);i.reset();var n=i.finalize(this._oKey.clone().concat(t));return n}})}()});
        //# sourceMappingURL=hmac.min.js.map
        !function(e,o,r){
              "object"==typeof exports?module.exports=exports=o(require("./core.min"),require("./cipher-core.min")):"function"==typeof define&&define.amd?define(["./core.min","./cipher-core.min"],o):o(e.CryptoJS)}(this,function(e){
              return e.mode.ECB=function(){
              var o=e.lib.BlockCipherMode.extend();return o.Encryptor=o.extend({
              processBlock:function(e,o){
              this._cipher.encryptBlock(e,o)}}),o.Decryptor=o.extend({
              processBlock:function(e,o){
              this._cipher.decryptBlock(e,o)}}),o}(),e.mode.ECB});
        //# sourceMappingURL=mode-ecb.min.js.map
        !function(e,r,i){
              "object"==typeof exports?module.exports=exports=r(require("./core.min"),require("./cipher-core.min")):"function"==typeof define&&define.amd?define(["./core.min","./cipher-core.min"],r):r(e.CryptoJS)}(this,function(e){
              return e.pad.Pkcs7});
        //# sourceMappingURL=pad-pkcs7.min.js.map
        !function(e,r,i){
              "object"==typeof exports?module.exports=exports=r(require("./core.min"),require("./enc-base64.min"),require("./md5.min"),require("./evpkdf.min"),require("./cipher-core.min")):"function"==typeof define&&define.amd?define(["./core.min","./enc-base64.min","./md5.min","./evpkdf.min","./cipher-core.min"],r):r(e.CryptoJS)}(this,function(e){
              return function(){
              var r=e,i=r.lib,n=i.BlockCipher,o=r.algo,t=[],c=[],s=[],f=[],a=[],d=[],u=[],v=[],h=[],y=[];!function(){
              for(var e=[],r=0;r<256;r++)r<128?e[r]=r<<1:e[r]=r<<1^283;for(var i=0,n=0,r=0;r<256;r++){
              var o=n^n<<1^n<<2^n<<3^n<<4;o=o>>>8^255&o^99,t[i]=o,c[o]=i;var p=e[i],l=e[p],_=e[l],k=257*e[o]^16843008*o;s[i]=k<<24|k>>>8,f[i]=k<<16|k>>>16,a[i]=k<<8|k>>>24,d[i]=k;var k=16843009*_^65537*l^257*p^16843008*i;u[o]=k<<24|k>>>8,v[o]=k<<16|k>>>16,h[o]=k<<8|k>>>24,y[o]=k,i?(i=p^e[e[e[_^p]]],n^=e[e[n]]):i=n=1}}();var p=[0,1,2,4,8,16,32,64,128,27,54],l=o.AES=n.extend({
              _doReset:function(){
              if(!this._nRounds||this._keyPriorReset!==this._key){
              for(var e=this._keyPriorReset=this._key,r=e.words,i=e.sigBytes/4,n=this._nRounds=i+6,o=4*(n+1),c=this._keySchedule=[],s=0;s<o;s++)if(s<i)c[s]=r[s];else{
              var f=c[s-1];s%i?i>6&&s%i==4&&(f=t[f>>>24]<<24|t[f>>>16&255]<<16|t[f>>>8&255]<<8|t[255&f]):(f=f<<8|f>>>24,f=t[f>>>24]<<24|t[f>>>16&255]<<16|t[f>>>8&255]<<8|t[255&f],f^=p[s/i|0]<<24),c[s]=c[s-i]^f}for(var a=this._invKeySchedule=[],d=0;d<o;d++){
              var s=o-d;if(d%4)var f=c[s];else var f=c[s-4];d<4||s<=4?a[d]=f:a[d]=u[t[f>>>24]]^v[t[f>>>16&255]]^h[t[f>>>8&255]]^y[t[255&f]]}}},encryptBlock:function(e,r){
              this._doCryptBlock(e,r,this._keySchedule,s,f,a,d,t)},decryptBlock:function(e,r){
              var i=e[r+1];e[r+1]=e[r+3],e[r+3]=i,this._doCryptBlock(e,r,this._invKeySchedule,u,v,h,y,c);var i=e[r+1];e[r+1]=e[r+3],e[r+3]=i},_doCryptBlock:function(e,r,i,n,o,t,c,s){
              for(var f=this._nRounds,a=e[r]^i[0],d=e[r+1]^i[1],u=e[r+2]^i[2],v=e[r+3]^i[3],h=4,y=1;y<f;y++){
              var p=n[a>>>24]^o[d>>>16&255]^t[u>>>8&255]^c[255&v]^i[h++],l=n[d>>>24]^o[u>>>16&255]^t[v>>>8&255]^c[255&a]^i[h++],_=n[u>>>24]^o[v>>>16&255]^t[a>>>8&255]^c[255&d]^i[h++],k=n[v>>>24]^o[a>>>16&255]^t[d>>>8&255]^c[255&u]^i[h++];a=p,d=l,u=_,v=k}var p=(s[a>>>24]<<24|s[d>>>16&255]<<16|s[u>>>8&255]<<8|s[255&v])^i[h++],l=(s[d>>>24]<<24|s[u>>>16&255]<<16|s[v>>>8&255]<<8|s[255&a])^i[h++],_=(s[u>>>24]<<24|s[v>>>16&255]<<16|s[a>>>8&255]<<8|s[255&d])^i[h++],k=(s[v>>>24]<<24|s[a>>>16&255]<<16|s[d>>>8&255]<<8|s[255&u])^i[h++];e[r]=p,e[r+1]=l,e[r+2]=_,e[r+3]=k},keySize:8});r.AES=n._createHelper(l)}(),e.AES});
        //# sourceMappingURL=aes.min.js.map
        !function(e,n){
              "object"==typeof exports?module.exports=exports=n(require("./core.min")):"function"==typeof define&&define.amd?define(["./core.min"],n):n(e.CryptoJS)}(this,function(e){
              return e.enc.Utf8});
        //# sourceMappingURL=enc-utf8.min.js.map
 *  前端js加密
    
        /**
         * 加密（需要先加载aes.min.js文件）
         * @param word
         * @returns {*}
         */
         function aesMinEncrypt(word){
              
             var _word = CryptoJS.enc.Utf8.parse(word),
                 _key = CryptoJS.enc.Utf8.parse("ihaierForTodoKey"),
                 _iv = CryptoJS.enc.Utf8.parse("ihaierForTodo_Iv");
             var encrypted = CryptoJS.AES.encrypt(_word, _key, {
              
                         iv: _iv,
                         mode: CryptoJS.mode.CBC,
                         padding: CryptoJS.pad.Pkcs7
                 });
             return encrypted.toString();
         }
 *  前端js解密
    
        /**
         * 解密（需要先加载aes.min.js文件）
         * @param word
         * @returns {*}
         */
        function aesDecrypt(word) {
              
            var _key = CryptoJS.enc.Utf8.parse("ihaierForTodoKey"),
                _iv = CryptoJS.enc.Utf8.parse("ihaierForTodo_Iv");
            var decrypted = CryptoJS.AES.decrypt(word, _key, {
              
                        iv: _iv,
                        mode: CryptoJS.mode.CBC,
                        padding: CryptoJS.pad.Pkcs7
                });
            return decrypted.toString(CryptoJS.enc.Utf8);
        }
    
     *  key：十六位作为密钥（前后端必须一致）
     *  iv：十六位作为密钥偏移量（前后端必须一致）
     *  算法：AES/CBC/PKCS7Padding
     *  注意点：Java本身不支持PKCS7，只支持PKCS5，但通过实验，两者即使不一样，也可以进行解密。

### 后端java解密 ###

*  需要导入的jar包
    
     *  org.apache.commons.codec.jar
     *  org.apache.commons.lang.jar

package com.founder.mrp.util;
    
    import javax.crypto.Cipher;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    
    import org.apache.commons.codec.binary.Base64;
    import org.apache.commons.lang.StringUtils;
    
    public class AesUtil {
        
        
        //密钥 (需要前端和后端保持一致)十六位作为密钥
        private static final String KEY = "ihaierForTodoKey";
    
        //密钥偏移量 (需要前端和后端保持一致)十六位作为密钥偏移量
        private static final String IV = "ihaierForTodo_Iv";
        
        //算法
        private static final String ALGORITHMSTR = "AES/CBC/PKCS5Padding";
        
        //SSO的TOKEN
        private static final String token = "4AaWABnPB5/1Z2EIEXwSfigudpiM4kzLkmIrKQPmS9w=";
        /** 
         * base 64 decode 
         * @param base64Code 待解码的base 64 code 
         * @return 解码后的byte[] 
         * @throws Exception 
         */
        public static byte[] base64Decode(String base64Code) throws Exception{
        
            /**sun.misc.BASE64Decoder是java内部类，有时候会报错，
             * 用org.apache.commons.codec.binary.Base64替代，效果一样。
             */
            //Base64 base64 = new Base64();
            //byte[] bytes = base64.decodeBase64(new String(base64Code).getBytes());
            //new BASE64Decoder().decodeBuffer(base64Code);
            return StringUtils.isEmpty(base64Code) ? null : new Base64().decodeBase64(new String(base64Code).getBytes());
        }
        
        /** 
         * AES解密 
         * @param encryptBytes 待解密的byte[] 
         * @return 解密后的String 
         * @throws Exception 
         */  
        public static String aesDecryptByBytes(byte[] encryptBytes) throws Exception {
        
    
            Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
            
            byte[] temp = IV.getBytes("UTF-8");
            IvParameterSpec iv = new IvParameterSpec(temp);
            
            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(KEY.getBytes(), "AES"), iv);
            byte[] decryptBytes = cipher.doFinal(encryptBytes);
            
            System.out.print(new String(decryptBytes));
            return new String(decryptBytes);
        }
    
        /** 
         * 将base 64 code AES解密 
         * @param encryptStr 待解密的base 64 code
         * @return 解密后的string
         * @throws Exception
         */ 
        public static String aesDecrypt(String encryptStr) throws Exception {
          
            return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr));  
        }
    
        public static void main(String[] args) throws Exception {
        
            aesDecrypt(token);
        }
    }

package com.founder.mrp.util;
    
    import org.apache.commons.codec.binary.Base64;
    import org.apache.commons.lang.StringUtils;
    import javax.crypto.Cipher;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    import java.nio.charset.StandardCharsets;
    
    /**
     * aes加密解密工具类
     * @author hanwl
     *  
     */
    
    public class AesUtil {
        
        
        //密钥 (需要前端和后端保持一致)十六位作为密钥
        private static final String KEY = "{g;,9~lde^[w`SR5";
    
        //密钥偏移量 (需要前端和后端保持一致)十六位作为密钥偏移量
        private static final String IV = "$JL<&*lZFsZ?:p#1";
        
        /**
         * base 64 decode 
         * @param base64Code 待解码的base 64 code 
         * @return 解码后的byte[]
         */
        public static byte[] base64Decode(String base64Code) {
        
            /* sun.misc.BASE64Decoder是java内部类，有时候会报错，
             * 用org.apache.commons.codec.binary.Base64替代，效果一样。
             */
            //Base64 base64 = new Base64();
            //byte[] bytes = base64.decodeBase64(new String(base64Code).getBytes());
            //new BASE64Decoder().decodeBuffer(base64Code);
            return StringUtils.isEmpty(base64Code) ? null : Base64.decodeBase64(base64Code.getBytes());
        }
        
        /** 
         * AES解密 
         * @param encryptBytes 待解密的byte[] 
         * @return 解密后的String 
         * @throws Exception 
         */  
        public static String aesDecryptByBytes(byte[] encryptBytes) throws Exception {
        
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            
            byte[] temp = IV.getBytes(StandardCharsets.US_ASCII);
            IvParameterSpec iv = new IvParameterSpec(temp);
            
            cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(KEY.getBytes(StandardCharsets.US_ASCII), "AES"), iv);
            byte[] decryptBytes = cipher.doFinal(encryptBytes);
            
            return new String(decryptBytes);
        }
    
        /** 
         * 将base 64 code AES解密 
         * @param encryptStr 待解密的base 64 code
         * @return 解密后的string
         * @throws Exception
         */ 
        public static String aesDecrypt(String encryptStr) throws Exception {
          
            return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr));  
        }
        
        @SuppressWarnings("unused")
        public static String aesEncrypt(String str) {
        
            try {
        
                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
                IvParameterSpec iv = new IvParameterSpec(IV.getBytes(StandardCharsets.US_ASCII));
                cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(KEY.getBytes(StandardCharsets.US_ASCII), "AES"), iv);
                byte[] encryptBytes = cipher.doFinal(str.getBytes(StandardCharsets.UTF_8));
    
                return new String(Base64.encodeBase64(encryptBytes),StandardCharsets.US_ASCII);
                //return java.util.Base64.getEncoder().encodeToString(encryptBytes);
            }
            catch (Exception e) {
        
                e.printStackTrace();
                return "";
            }
        }
            
        /** 
         * 生成一个可选长度的随机数列
         * @param 
         */
        public static String getRandomCode(int length){
        
            String[] arr = new String[]{
        "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", 
                                        "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", 
                                        "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", 
                                        "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};
            String str="";
            for (int i = 0; i < length; i++) {
        
                 int r = (int) (Math.random()*61);
                 str += arr[r];
              }
            return str;
        }
        
        public static void main(String[] args) {
        
            String a1=aesEncrypt("12345asdfg");
            System.out.println(a1);
            try {
        
                String a2 =aesDecrypt(a1);
                System.out.println(a2);
            } catch (Exception e) {
        
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

*  密钥和密钥偏移量必须和前端一致
 *  算法可以采用PKCS5（Java本身不支持PKCS7），如果想使用PKCS7，需要额外引入jar包。