国密 sm4 js 加密， java解密

sm4.js

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/**  * base64js  */ /**  * base64js  * base64js.toByteArray(d.input)  * base64js.fromByteArray(c);  * @author c.z.s  * @email 1048829253@qq.com  * @company  * @date 2018-07  *  */ (function(r){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=r()}else{if(typeof define===     "function"&&define.amd){define([],r)}else{var e;if(typeof window!=="undefined"){e=window}else{if(typeof global     !=="undefined"){e=global}else{if(typeof self!=="undefined"){e=self}else{e=this}}}e.base64js=r()}}})(function(){     var r,e,t;return function r(e,t,n){function o(i,a){if(!t[i]){if(!e[i]){var u=typeof require=="function"&&require;if(!a&&u){         return u(i,!0)}if(f){return f(i,!0)}var d=new Error("Cannot find module '"+i+"'");throw d.code="MODULE_NOT_FOUND",d}         var c=t[i]={exports:{}};e[i][0].call(c.exports,function(r){var t=e[i][1][r];return o(t?t:r)},c,c.exports,r,e,t,n)}return t[i].exports}         var f=typeof require=="function"&&require;for(var i=0;i<n.length;i++){o(n[i])}return o}({"/":[function(r,e,t){t.byteLength=c;             t.toByteArray=v;t.fromByteArray=s;var n=[];var o=[];var f=typeof Uint8Array!=="undefined"?Uint8Array:Array;             var i="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";for(var a=0,u=i.length;a<u;++a){n[a]=i[a];                 o[i.charCodeAt(a)]=a}o["-".charCodeAt(0)]=62;o["_".charCodeAt(0)]=63;function d(r){var e=r.length;if(e%4>0){                 throw new Error("Invalid string. Length must be a multiple of 4")}return r[e-2]==="="?2:r[e-1]==="="?1:0}             function c(r){return r.length*3/4-d(r)}function v(r){var e,t,n,i,a;var u=r.length;i=d(r);a=new f(u*3/4-i);t=i>0?u-4:u;                 var c=0;for(e=0;e<t;e+=4){n=o[r.charCodeAt(e)]<<18|o[r.charCodeAt(e+1)]<<12|o[r.charCodeAt(e+2)]<<6|o[r.charCodeAt(e+3)];                     a[c++]=n>>16&255;a[c++]=n>>8&255;a[c++]=n&255}if(i===2){n=o[r.charCodeAt(e)]<<2|o[r.charCodeAt(e+1)]>>4;a[c++]=n&255}                 else{if(i===1){n=o[r.charCodeAt(e)]<<10|o[r.charCodeAt(e+1)]<<4|o[r.charCodeAt(e+2)]>>2;a[c++]=n>>8&255;a[c++]=n&255}}return a}             function l(r){return n[r>>18&63]+n[r>>12&63]+n[r>>6&63]+n[r&63]}function h(r,e,t){var n;var o=[];for(var f=e;f<t;f+=3){                 n=(r[f]<<16)+(r[f+1]<<8)+r[f+2];o.push(l(n))}return o.join("")}function s(r){var e;var t=r.length;var o=t%3;var f="";var i=[];                 var a=16383;for(var u=0,d=t-o;u<d;u+=a){i.push(h(r,u,u+a>d?d:u+a))}if(o===1){e=r[t-1];f+=n[e>>2];f+=n[e<<4&63];f+="=="}else{if(o===2){                     e=(r[t-2]<<8)+r[t-1];f+=n[e>>10];f+=n[e>>4&63];f+=n[e<<2&63];f+="="}}i.push(f);return i.join("")}},{}]},{},[])("/")});     /**  * 国密SM4加密算法  * @author c.z.s  * @email 1048829253@qq.com  * @company GDT-ZWZX-DEV-PT  * @date 2018-07  */ function SM4_Context() {     this.mode=1;     this.isPadding = true;     this.sk = new Array(32); }   function SM4() {     this.SM4_ENCRYPT=1;     this.SM4_DECRYPT = 0;       var SboxTable = [0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05,         0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99,         0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62,         0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6,         0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8,         0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35,         0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87,         0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e,         0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1,         0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3,         0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f,         0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51,         0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8,         0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0,         0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84,         0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48];       var FK = [ 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc ];       var CK = [ 0x00070e15,0x1c232a31,0x383f464d,0x545b6269,         0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,         0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,         0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,         0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,         0x30373e45,0x4c535a61,0x686f767d,0x848b9299,         0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,         0x10171e25,0x2c333a41,0x484f565d,0x646b7279 ];       this.GET_ULONG_BE=function(b,i) {         return (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8) | (b[i + 3] & 0xff) & 0xffffffff;     }       this.PUT_ULONG_BE=function( n, b, i){         var t1=(0xFF & (n >> 24));         var t2=(0xFF & (n >> 16));         var t3=(0xFF & (n >> 8));         var t4=(0xFF & (n));         b[i] = t1>128?t1-256:t1;         b[i + 1] = t2>128?t2-256:t2;         b[i + 2] = t3>128?t3-256:t3;         b[i + 3] = t4>128?t4-256:t4;     }       this.SHL=function(x,n){         return (x & 0xFFFFFFFF) << n;     }       this.ROTL=function( x,  n){         var s =this.SHL(x, n);         var ss= x >> (32 - n);         return this.SHL(x, n) | x >> (32 - n);     }         this.sm4Lt=function(ka){         var bb = 0;         var c = 0;         var a = new Array(4);         var b = new Array(4);         this.PUT_ULONG_BE(ka, a, 0);         b[0] = this.sm4Sbox(a[0]);         b[1] = this.sm4Sbox(a[1]);         b[2] = this.sm4Sbox(a[2]);         b[3] = this.sm4Sbox(a[3]);         bb = this.GET_ULONG_BE(b, 0);         c = bb ^ this.ROTL(bb, 2) ^ this.ROTL(bb, 10) ^ this.ROTL(bb, 18) ^ this.ROTL(bb, 24);         return c;     }       this.sm4F=function( x0,  x1,  x2,  x3,  rk){         return x0 ^ this.sm4Lt(x1 ^ x2 ^ x3 ^ rk);     }       this.sm4CalciRK=function(ka){         var bb = 0;         var rk = 0;         var a = new Array(4);         var b = new Array(4);         this.PUT_ULONG_BE(ka, a, 0);         b[0] = this.sm4Sbox(a[0]);         b[1] = this.sm4Sbox(a[1]);         b[2] = this.sm4Sbox(a[2]);         b[3] = this.sm4Sbox(a[3]);         bb = this.GET_ULONG_BE(b, 0);         rk = bb ^ this.ROTL(bb, 13) ^ this.ROTL(bb, 23);         return rk;     }           this.sm4Sbox=function(inch){         var i = inch & 0xFF;         var retVal = SboxTable[i];         return  retVal>128?retVal-256:retVal;     }       this.sm4_setkey_enc = function(ctx, key){         if (ctx == null) {             alert("ctx is null!");             return false;         }         if (key == null || key.length != 16){             alert("key error!");             return false;         }         ctx.mode = this.SM4_ENCRYPT;         this.sm4_setkey(ctx.sk, key);       };       this.sm4_setkey = function(SK, key){         var MK = new Array(4);         var k =  new Array(36);         var i = 0;         MK[0] = this.GET_ULONG_BE(key, 0);         MK[1] = this.GET_ULONG_BE(key, 4);         MK[2] = this.GET_ULONG_BE(key, 8);         MK[3] = this.GET_ULONG_BE(key, 12);         k[0] = MK[0] ^  FK[0];         k[1] = MK[1] ^  FK[1];         k[2] = MK[2] ^  FK[2];         k[3] = MK[3] ^  FK[3];         for (var i=0; i < 32; i++){             k[(i + 4)] = (k[i] ^ this.sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ CK[i]));             SK[i] = k[(i + 4)];         }       }     this.padding=function(input,mode){         if (input == null){             return null;         }         var ret =  null;         if (mode == this.SM4_ENCRYPT){             var p = parseInt(16 - input.length % 16);             ret = input.slice(0);             for (var i = 0; i < p; i++){                 ret[input.length + i] = p;             }         }else{             var p = input[input.length - 1];             ret=input.slice(0,input.length - p);         }         return ret;     }     this.sm4_one_round=function(sk, input, output){         var  i = 0;         var ulbuf = new Array(36);         ulbuf[0] = this.GET_ULONG_BE(input, 0);         ulbuf[1] = this.GET_ULONG_BE(input, 4);         ulbuf[2] = this.GET_ULONG_BE(input, 8);         ulbuf[3] = this.GET_ULONG_BE(input, 12);         while (i < 32){             ulbuf[(i + 4)] = this.sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);             i++;         }         this.PUT_ULONG_BE(ulbuf[35], output, 0);         this.PUT_ULONG_BE(ulbuf[34], output, 4);         this.PUT_ULONG_BE(ulbuf[33], output, 8);         this.PUT_ULONG_BE(ulbuf[32], output, 12);       }           this.sm4_crypt_ecb=function(ctx,input){         if (input == null){             alert("input is null!");         }         if ((ctx.isPadding) && (ctx.mode == this.SM4_ENCRYPT)){             input = this.padding(input, this.SM4_ENCRYPT);         }           var i=0;         var length = input.length;         var bous = new Array();         for(; length > 0; length -= 16)         {             var out = new Array(16);             var ins=input.slice(i*16,(16*(i+1)));             this.sm4_one_round(ctx.sk, ins, out)             bous=bous.concat(out);             i++;         }           var output = bous;         if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT)         {             output = this.padding(output, this.SM4_DECRYPT);         }         for(var i=0;i<output.length;i++){             if(output[i]<0){                 output[i]=output[i]+256;             }         }         return output;     }       this.sm4_crypt_cbc=function(ctx, iv, input){         if (iv == null || iv.length != 16) {             alert("iv error!");         }           if (input == null){             alert("input is null!");         }           if (ctx.isPadding && ctx.mode == this.SM4_ENCRYPT) {             input = this.padding(input, this.SM4_ENCRYPT);         }           var i = 0;         var length = input.length;         var bous =new Array();         if (ctx.mode == this.SM4_ENCRYPT){             var k=0;             for(; length > 0; length -= 16){                 var out = new Array(16);                 var out1 = new Array(16);                 var ins=input.slice(k*16,(16*(k+1)));                   for (i = 0; i < 16; i++)                 {                     out[i] = (ins[i] ^ iv[i]);                 }                 this.sm4_one_round(ctx.sk, out, out1);                 iv=out1.slice(0,16);                 bous=bous.concat(out1);                 k++;             }         }         else         {             var temp = [];             var k=0;             for(; length > 0; length -= 16)             {                 var out = new Array(16);                 var out1 = new Array(16);                 var ins=input.slice(k*16,(16*(k+1)));                 temp=ins.slice(0,16);                 sm4_one_round(ctx.sk, ins, out);                 for (i = 0; i < 16; i++)                 {                     out1[i] = (out[i] ^ iv[i]);                 }                 iv=temp.slice(0,16);                 bous=bous.concat(out1);                 k++;             }         }           var output = bous;         if (ctx.isPadding && ctx.mode == this.SM4_DECRYPT)         {             output = this.padding(output, this.SM4_DECRYPT);         }           for(var i=0;i<output.length;i++){             if(output[i]<0){                 output[i]=output[i]+256;             }         }         return output;     } }     function SM4Util() {     this.secretKey="11HDESaAhiHHugDz";     this.iv = "";     this.hexString = false;       this.encryptData_ECB=function(plainText){         try{             var sm4 = new SM4();             var ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = sm4.SM4_ENCRYPT;             var keyBytes= stringToByte(this.secretKey);             sm4.sm4_setkey_enc(ctx, keyBytes);             var encrypted = sm4.sm4_crypt_ecb(ctx, stringToByte(plainText));             var cipherText = base64js.fromByteArray(encrypted);             if (cipherText != null && cipherText.trim().length > 0)             {                 cipherText.replace(/(\s*|\t|\r|\n)/g, "");             }             return cipherText;         }catch (e){             console.error(e);             return null;         }       }       this.encryptData_CBC=function(plainText){         try{             var sm4 = new SM4();             var ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = sm4.SM4_ENCRYPT;               var keyBytes = stringToByte(this.secretKey) ;             var ivBytes= stringToByte(this.iv) ;               sm4.sm4_setkey_enc(ctx, keyBytes);             var encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, stringToByte(plainText));             var cipherText = base64js.fromByteArray(encrypted);             if (cipherText != null && cipherText.trim().length > 0)             {                 cipherText.replace(/(\s*|\t|\r|\n)/g, "");             }             return cipherText;         }         catch ( e)         {             console.error(e);             return null;         }     }       stringToByte=function(str) {         var bytes = new Array();         var len, c;         len = str.length;         for(var i = 0; i < len; i++) {             c = str.charCodeAt(i);             if(c >= 0x010000 && c <= 0x10FFFF) {                 bytes.push(((c >> 18) & 0x07) | 0xF0);                 bytes.push(((c >> 12) & 0x3F) | 0x80);                 bytes.push(((c >> 6) & 0x3F) | 0x80);                 bytes.push((c & 0x3F) | 0x80);             } else if(c >= 0x000800 && c <= 0x00FFFF) {                 bytes.push(((c >> 12) & 0x0F) | 0xE0);                 bytes.push(((c >> 6) & 0x3F) | 0x80);                 bytes.push((c & 0x3F) | 0x80);             } else if(c >= 0x000080 && c <= 0x0007FF) {                 bytes.push(((c >> 6) & 0x1F) | 0xC0);                 bytes.push((c & 0x3F) | 0x80);             } else {                 bytes.push(c & 0xFF);             }         }         return bytes;     }         byteToString=function(arr) {         if(typeof arr === 'string') {             return arr;         }         var str = '',             _arr = arr;         for(var i = 0; i < _arr.length; i++) {             var one = _arr[i].toString(2),                 v = one.match(/^1+?(?=0)/);             if(v && one.length == 8) {                 var bytesLength = v[0].length;                 var store = _arr[i].toString(2).slice(7 - bytesLength);                 for(var st = 1; st < bytesLength; st++) {                     store += _arr[st + i].toString(2).slice(2);                 }                 str += String.fromCharCode(parseInt(store, 2));                 i += bytesLength - 1;             } else {                 str += String.fromCharCode(_arr[i]);             }         }         return str;     } };

　　SM4.java

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package com.ruoyi.common.utils;   import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream;   public class SM4 {     public static final int SM4_ENCRYPT = 1;       public static final int SM4_DECRYPT = 0;       private int GET_ULONG_BE(byte[] b, int i)     {         int n = (int)(b[i] & 0xff) << 24 | (int)((b[i + 1] & 0xff) << 16) | (int)((b[i + 2] & 0xff) << 8) | (int)(b[i + 3] & 0xff) & 0xffffffff;         return n;     }       private void PUT_ULONG_BE(int n, byte[] b, int i)     {         b[i] = (byte)(int)(0xFF & n >> 24);         b[i + 1] = (byte)(int)(0xFF & n >> 16);         b[i + 2] = (byte)(int)(0xFF & n >> 8);         b[i + 3] = (byte)(int)(0xFF & n);     }       private int SHL(int x, int n)     {         return (x & 0xFFFFFFFF) << n;     }       private int ROTL(int x, int n)     {         return SHL(x, n) | x >> (32 - n);     }       public static final byte[] SboxTable = { (byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe,             (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6,             0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67,             (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3,             (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06,             (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91,             (byte) 0xef, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43,             (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4,             (byte) 0xb3, 0x1c, (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8,             (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94, (byte) 0xfa,             0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7,             (byte) 0xfc, (byte) 0xf3, 0x73, 0x17, (byte) 0xba, (byte) 0x83,             0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8,             0x68, 0x6b, (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda,             (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70, 0x56,             (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1,             (byte) 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, (byte) 0x87,             (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27,             0x52, 0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4,             (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf, (byte) 0x8a,             (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3,             (byte) 0xf7, (byte) 0xf2, (byte) 0xce, (byte) 0xf9, 0x61, 0x15,             (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4,             (byte) 0x9b, 0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32,             0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3, 0x1d,             (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca,             0x60, (byte) 0xc0, 0x29, 0x23, (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f,             (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,             (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b,             0x51, (byte) 0x8d, 0x1b, (byte) 0xaf, (byte) 0x92, (byte) 0xbb,             (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41,             0x1f, 0x10, 0x5a, (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31,             (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d,             0x74, (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4,             (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a, 0x0c,             (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09,             (byte) 0xc5, 0x6e, (byte) 0xc6, (byte) 0x84, 0x18, (byte) 0xf0,             0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79,             (byte) 0xee, 0x5f, 0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48 };       public static final int[] FK = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };       public static final int[] CK = { 0x00070e15,0x1c232a31,0x383f464d,0x545b6269,             0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,             0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,             0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,             0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,             0x30373e45,0x4c535a61,0x686f767d,0x848b9299,             0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,             0x10171e25,0x2c333a41,0x484f565d,0x646b7279 };       private byte sm4Sbox(byte inch)     {         int i = inch & 0xFF;         byte retVal = SboxTable[i];         return retVal;     }       private int sm4Lt(int ka)     {         int bb = 0;         int c = 0;         byte[] a = new byte[4];         byte[] b = new byte[4];         PUT_ULONG_BE(ka, a, 0);         b[0] = sm4Sbox(a[0]);         b[1] = sm4Sbox(a[1]);         b[2] = sm4Sbox(a[2]);         b[3] = sm4Sbox(a[3]);         bb = GET_ULONG_BE(b, 0);         c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);         return c;     }       private int sm4F(int x0, int x1, int x2, int x3, int rk)     {         return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);     }       private int sm4CalciRK(int ka)     {         int bb = 0;         int rk = 0;         byte[] a = new byte[4];         byte[] b = new byte[4];         PUT_ULONG_BE(ka, a, 0);         b[0] = sm4Sbox(a[0]);         b[1] = sm4Sbox(a[1]);         b[2] = sm4Sbox(a[2]);         b[3] = sm4Sbox(a[3]);         bb = GET_ULONG_BE(b, 0);         rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);         return rk;     }       private void sm4_setkey(int[] SK, byte[] key)     {         int[] MK = new int[4];         int[] k = new int[36];         int i = 0;         MK[0] = GET_ULONG_BE(key, 0);         MK[1] = GET_ULONG_BE(key, 4);         MK[2] = GET_ULONG_BE(key, 8);         MK[3] = GET_ULONG_BE(key, 12);         k[0] = MK[0] ^ (int) FK[0];         k[1] = MK[1] ^ (int) FK[1];         k[2] = MK[2] ^ (int) FK[2];         k[3] = MK[3] ^ (int) FK[3];         for (; i < 32; i++)         {             k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (int) CK[i]));             SK[i] = k[(i + 4)];         }     }       private void sm4_one_round(int[] sk, byte[] input, byte[] output)     {         int i = 0;         int[] ulbuf = new int[36];         ulbuf[0] = GET_ULONG_BE(input, 0);         ulbuf[1] = GET_ULONG_BE(input, 4);         ulbuf[2] = GET_ULONG_BE(input, 8);         ulbuf[3] = GET_ULONG_BE(input, 12);         while (i < 32)         {             ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);             i++;         }         PUT_ULONG_BE(ulbuf[35], output, 0);         PUT_ULONG_BE(ulbuf[34], output, 4);         PUT_ULONG_BE(ulbuf[33], output, 8);         PUT_ULONG_BE(ulbuf[32], output, 12);     }       private byte[] padding(byte[] input, int mode)     {         if (input == null)         {             return null;         }           byte[] ret = (byte[]) null;         if (mode == SM4_ENCRYPT)         {             int p = 16 - input.length % 16;             ret = new byte[input.length + p];             System.arraycopy(input, 0, ret, 0, input.length);             for (int i = 0; i < p; i++)             {                 ret[input.length + i] = (byte) p;             }         }         else         {             int p = input[input.length - 1];             ret = new byte[input.length - p];             System.arraycopy(input, 0, ret, 0, input.length - p);         }         return ret;     }       public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception     {         if (ctx == null)         {             throw new Exception("ctx is null!");         }           if (key == null || key.length != 16)         {             throw new Exception("key error!");         }           ctx.mode = SM4_ENCRYPT;         sm4_setkey(ctx.sk, key);     }         public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception     {         if (input == null)         {             throw new Exception("input is null!");         }           if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT))         {             input = padding(input, SM4_ENCRYPT);         }           int length = input.length;         ByteArrayInputStream bins = new ByteArrayInputStream(input);         ByteArrayOutputStream bous = new ByteArrayOutputStream();         for(; length > 0; length -= 16)         {             byte[] in = new byte[16];             byte[] out = new byte[16];             bins.read(in);             sm4_one_round(ctx.sk, in, out);             bous.write(out);         }           byte[] output = bous.toByteArray();         if (ctx.isPadding && ctx.mode == SM4_DECRYPT)         {             output = padding(output, SM4_DECRYPT);         }         bins.close();         bous.close();         return output;     }         public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception     {         if (ctx == null)         {             throw new Exception("ctx is null!");         }           if (key == null || key.length != 16)         {             throw new Exception("key error!");         }           int i = 0;         ctx.mode = SM4_DECRYPT;         sm4_setkey(ctx.sk, key);         for (i = 0; i < 16; i++)         {             SWAP(ctx.sk, i);         }     }           private void SWAP(int[] sk, int i)     {         int t = sk[i];         sk[i] = sk[(31 - i)];         sk[(31 - i)] = t;     }             public byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input) throws Exception     {         if (iv == null || iv.length != 16)         {             throw new Exception("iv error!");         }           if (input == null)         {             throw new Exception("input is null!");         }           if (ctx.isPadding && ctx.mode == SM4_ENCRYPT)         {             input = padding(input, SM4_ENCRYPT);         }           int i = 0;         int length = input.length;         ByteArrayInputStream bins = new ByteArrayInputStream(input);         ByteArrayOutputStream bous = new ByteArrayOutputStream();         if (ctx.mode == SM4_ENCRYPT)         {             for(; length > 0; length -= 16)             {                 byte[] in = new byte[16];                 byte[] out = new byte[16];                 byte[] out1 = new byte[16];                   bins.read(in);                 for (i = 0; i < 16; i++)                 {                     out[i] = ((byte) (in[i] ^ iv[i]));                 }                 sm4_one_round(ctx.sk, out, out1);                 System.arraycopy(out1, 0, iv, 0, 16);                 bous.write(out1);             }         }         else         {             byte[] temp = new byte[16];             for(; length > 0; length -= 16)             {                 byte[] in = new byte[16];                 byte[] out = new byte[16];                 byte[] out1 = new byte[16];                   bins.read(in);                 System.arraycopy(in, 0, temp, 0, 16);                 sm4_one_round(ctx.sk, in, out);                 for (i = 0; i < 16; i++)                 {                     out1[i] = ((byte) (out[i] ^ iv[i]));                 }                 System.arraycopy(temp, 0, iv, 0, 16);                 bous.write(out1);             }         }           byte[] output = bous.toByteArray();         if (ctx.isPadding && ctx.mode == SM4_DECRYPT)         {             output = padding(output, SM4_DECRYPT);         }         bins.close();         bous.close();         return output;     }       }

　　

SM4_Context.java

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package com.ruoyi.common.utils;   public class SM4_Context {     public int mode;       public int[] sk;       public boolean isPadding;       public SM4_Context()     {         this.mode = 1;         this.isPadding = true;         this.sk = new int[32];     } }

　　

SM4Utils.java

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package com.ruoyi.common.utils;   import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder;   import java.io.UnsupportedEncodingException; import java.util.regex.Matcher; import java.util.regex.Pattern;   public class SM4Utils {     private String secretKey = "";     private String iv = "";     private boolean hexString = false;       public SM4Utils()     {     }       public String encryptData_ECB(String plainText)     {         try         {             SM4_Context ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = SM4.SM4_ENCRYPT;               byte[] keyBytes;             keyBytes = secretKey.getBytes();             SM4 sm4 = new SM4();             sm4.sm4_setkey_enc(ctx, keyBytes);             byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes("UTF-8"));             String cipherText = new BASE64Encoder().encode(encrypted);             if (cipherText != null && cipherText.trim().length() > 0)             {                 Pattern p = Pattern.compile("\\s*|\t|\r|\n");                 Matcher m = p.matcher(cipherText);                 cipherText = m.replaceAll("");             }             return cipherText;         }         catch (Exception e)         {             e.printStackTrace();             return null;         }     }       public String decryptData_ECB(String cipherText)     {         try         {             SM4_Context ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = SM4.SM4_DECRYPT;               byte[] keyBytes;             keyBytes = secretKey.getBytes();             SM4 sm4 = new SM4();             sm4.sm4_setkey_dec(ctx, keyBytes);             byte[] decrypted = sm4.sm4_crypt_ecb(ctx, new BASE64Decoder().decodeBuffer(cipherText));             return new String(decrypted, "UTF-8");         }         catch (Exception e)         {             e.printStackTrace();             return null;         }     }       public String encryptData_CBC(String plainText){         try{             SM4_Context ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = SM4.SM4_ENCRYPT;               byte[] keyBytes;             byte[] ivBytes;               keyBytes = secretKey.getBytes();             ivBytes = iv.getBytes();               SM4 sm4 = new SM4();             sm4.sm4_setkey_enc(ctx, keyBytes);             byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes("UTF-8"));             String cipherText = new BASE64Encoder().encode(encrypted);             if (cipherText != null && cipherText.trim().length() > 0)             {                 Pattern p = Pattern.compile("\\s*|\t|\r|\n");                 Matcher m = p.matcher(cipherText);                 cipherText = m.replaceAll("");             }             return cipherText;         }         catch (Exception e)         {             e.printStackTrace();             return null;         }     }       public String decryptData_CBC(String cipherText)     {         try         {             SM4_Context ctx = new SM4_Context();             ctx.isPadding = true;             ctx.mode = SM4.SM4_DECRYPT;               byte[] keyBytes;             byte[] ivBytes;             if (hexString)             {                 keyBytes = Util.hexStringToBytes(secretKey);                 ivBytes = Util.hexStringToBytes(iv);             }             else             {                 keyBytes = secretKey.getBytes();                 ivBytes = iv.getBytes();             }               SM4 sm4 = new SM4();             sm4.sm4_setkey_dec(ctx, keyBytes);             byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, new BASE64Decoder().decodeBuffer(cipherText));             return new String(decrypted, "UTF-8");         }         catch (Exception e)         {             e.printStackTrace();             return null;         }     }       public String getSecretKey() {         return secretKey;     }       public void setSecretKey(String secretKey) {         this.secretKey = secretKey;     }       public String getIv() {         return iv;     }       public void setIv(String iv) {         this.iv = iv;     }       public static void main(String[] args) throws UnsupportedEncodingException {         String plainText ="ssda撒了ii&$$^##)*&6223';.,[]";         SM4Utils sm4 = new SM4Utils();         sm4.secretKey = "11HDESaAhiHHugDz";         sm4.iv = "";         plainText.getBytes("UTF-8");         System.out.println("ECB模式");         String cipherText = sm4.encryptData_ECB(plainText);         System.out.println("密文: " + cipherText);         System.out.println("");           plainText = sm4.decryptData_ECB(cipherText);         System.out.println("明文: " + plainText);         System.out.println("");           System.out.println("CBC模式");         sm4.iv = "UISwD9fW6cFh9SNS";         cipherText = sm4.encryptData_CBC(plainText);         System.out.println("密文: " + cipherText);         System.out.println("");           plainText = sm4.decryptData_CBC(cipherText);         System.out.println("明文: " + plainText);         }   }

　　Util.java

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package com.ruoyi.common.utils;   import java.math.BigInteger;   public class Util {     /**      * 整形转换成网络传输的字节流（字节数组）型数据      *      * @param num 一个整型数据      * @return 4个字节的自己数组      */     public static byte[] intToBytes(int num)     {         byte[] bytes = new byte[4];         bytes[0] = (byte) (0xff & (num >> 0));         bytes[1] = (byte) (0xff & (num >> 8));         bytes[2] = (byte) (0xff & (num >> 16));         bytes[3] = (byte) (0xff & (num >> 24));         return bytes;     }       /**      * 四个字节的字节数据转换成一个整形数据      *      * @param bytes 4个字节的字节数组      * @return 一个整型数据      */     public static int byteToInt(byte[] bytes)     {         int num = 0;         int temp;         temp = (0x000000ff & (bytes[0])) << 0;         num = num | temp;         temp = (0x000000ff & (bytes[1])) << 8;         num = num | temp;         temp = (0x000000ff & (bytes[2])) << 16;         num = num | temp;         temp = (0x000000ff & (bytes[3])) << 24;         num = num | temp;         return num;     }       /**      * 长整形转换成网络传输的字节流（字节数组）型数据      *      * @param num 一个长整型数据      * @return 4个字节的自己数组      */     public static byte[] longToBytes(long num)     {         byte[] bytes = new byte[8];         for (int i = 0; i < 8; i++)         {             bytes[i] = (byte) (0xff & (num >> (i * 8)));         }           return bytes;     }       /**      * 大数字转换字节流（字节数组）型数据      *      * @param n      * @return      */     public static byte[] byteConvert32Bytes(BigInteger n)     {         byte tmpd[] = (byte[])null;         if(n == null)         {             return null;         }           if(n.toByteArray().length == 33)         {             tmpd = new byte[32];             System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);         }         else if(n.toByteArray().length == 32)         {             tmpd = n.toByteArray();         }         else         {             tmpd = new byte[32];             for(int i = 0; i < 32 - n.toByteArray().length; i++)             {                 tmpd[i] = 0;             }             System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);         }         return tmpd;     }       /**      * 换字节流（字节数组）型数据转大数字      *      * @param b      * @return      */     public static BigInteger byteConvertInteger(byte[] b)     {         if (b[0] < 0)         {             byte[] temp = new byte[b.length + 1];             temp[0] = 0;             System.arraycopy(b, 0, temp, 1, b.length);             return new BigInteger(temp);         }         return new BigInteger(b);     }       /**      * 根据字节数组获得值(十六进制数字)      *      * @param bytes      * @return      */     public static String getHexString(byte[] bytes)     {         return getHexString(bytes, true);     }       /**      * 根据字节数组获得值(十六进制数字)      *      * @param bytes      * @param upperCase      * @return      */     public static String getHexString(byte[] bytes, boolean upperCase)     {         String ret = "";         for (int i = 0; i < bytes.length; i++)         {             ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);         }         return upperCase ? ret.toUpperCase() : ret;     }       /**      * 打印十六进制字符串      *      * @param bytes      */     public static void printHexString(byte[] bytes)     {         for (int i = 0; i < bytes.length; i++)         {             String hex = Integer.toHexString(bytes[i] & 0xFF);             if (hex.length() == 1)             {                 hex = '0' + hex;             }             System.out.print("0x" + hex.toUpperCase() + ",");         }         System.out.println("");     }       /**      * Convert hex string to byte[]      *      * @param hexString      *            the hex string      * @return byte[]      */     public static byte[] hexStringToBytes(String hexString)     {         if (hexString == null || hexString.equals(""))         {             return null;         }           hexString = hexString.toUpperCase();         int length = hexString.length() / 2;         char[] hexChars = hexString.toCharArray();         byte[] d = new byte[length];         for (int i = 0; i < length; i++)         {             int pos = i * 2;             d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));         }         return d;     }       /**      * Convert char to byte      *      * @param c      *            char      * @return byte      */     public static byte charToByte(char c)     {         return (byte) "0123456789ABCDEF".indexOf(c);     }       /**      * 用于建立十六进制字符的输出的小写字符数组      */     private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5',             '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};       /**      * 用于建立十六进制字符的输出的大写字符数组      */     private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5',             '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};       /**      * 将字节数组转换为十六进制字符数组      *      * @param data byte[]      * @return 十六进制char[]      */     public static char[] encodeHex(byte[] data) {         return encodeHex(data, true);     }       /**      * 将字节数组转换为十六进制字符数组      *      * @param data        byte[]      * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式      * @return 十六进制char[]      */     public static char[] encodeHex(byte[] data, boolean toLowerCase) {         return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);     }       /**      * 将字节数组转换为十六进制字符数组      *      * @param data     byte[]      * @param toDigits 用于控制输出的char[]      * @return 十六进制char[]      */     protected static char[] encodeHex(byte[] data, char[] toDigits) {         int l = data.length;         char[] out = new char[l << 1];         // two characters form the hex value.         for (int i = 0, j = 0; i < l; i++) {             out[j++] = toDigits[(0xF0 & data[i]) >>> 4];             out[j++] = toDigits[0x0F & data[i]];         }         return out;     }       /**      * 将字节数组转换为十六进制字符串      *      * @param data byte[]      * @return 十六进制String      */     public static String encodeHexString(byte[] data) {         return encodeHexString(data, true);     }       /**      * 将字节数组转换为十六进制字符串      *      * @param data        byte[]      * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式      * @return 十六进制String      */     public static String encodeHexString(byte[] data, boolean toLowerCase) {         return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);     }       /**      * 将字节数组转换为十六进制字符串      *      * @param data     byte[]      * @param toDigits 用于控制输出的char[]      * @return 十六进制String      */     protected static String encodeHexString(byte[] data, char[] toDigits) {         return new String(encodeHex(data, toDigits));     }       /**      * 将十六进制字符数组转换为字节数组      *      * @param data 十六进制char[]      * @return byte[]      * @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常      */     public static byte[] decodeHex(char[] data) {         int len = data.length;           if ((len & 0x01) != 0) {             throw new RuntimeException("Odd number of characters.");         }           byte[] out = new byte[len >> 1];           // two characters form the hex value.         for (int i = 0, j = 0; j < len; i++) {             int f = toDigit(data[j], j) << 4;             j++;             f = f | toDigit(data[j], j);             j++;             out[i] = (byte) (f & 0xFF);         }           return out;     }       /**      * 将十六进制字符转换成一个整数      *      * @param ch    十六进制char      * @param index 十六进制字符在字符数组中的位置      * @return 一个整数      * @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常      */     protected static int toDigit(char ch, int index) {         int digit = Character.digit(ch, 16);         if (digit == -1) {             throw new RuntimeException("Illegal hexadecimal character " + ch                     + " at index " + index);         }         return digit;     }       /**      * 数字字符串转ASCII码字符串      *      * @param String      *            字符串      * @return ASCII字符串      */     public static String StringToAsciiString(String content) {         String result = "";         int max = content.length();         for (int i = 0; i < max; i++) {             char c = content.charAt(i);             String b = Integer.toHexString(c);             result = result + b;         }         return result;     }       /**      * 十六进制转字符串      *      * @param hexString      *            十六进制字符串      * @param encodeType      *            编码类型4：Unicode，2：普通编码      * @return 字符串      */     public static String hexStringToString(String hexString, int encodeType) {         String result = "";         int max = hexString.length() / encodeType;         for (int i = 0; i < max; i++) {             char c = (char) hexStringToAlgorism(hexString                     .substring(i * encodeType, (i + 1) * encodeType));             result += c;         }         return result;     }       /**      * 十六进制字符串装十进制      *      * @param hex      *            十六进制字符串      * @return 十进制数值      */     public static int hexStringToAlgorism(String hex) {         hex = hex.toUpperCase();         int max = hex.length();         int result = 0;         for (int i = max; i > 0; i--) {             char c = hex.charAt(i - 1);             int algorism = 0;             if (c >= '0' && c <= '9') {                 algorism = c - '0';             } else {                 algorism = c - 55;             }             result += Math.pow(16, max - i) * algorism;         }         return result;     }       /**      * 十六转二进制      *      * @param hex      *            十六进制字符串      * @return 二进制字符串      */     public static String hexStringToBinary(String hex) {         hex = hex.toUpperCase();         String result = "";         int max = hex.length();         for (int i = 0; i < max; i++) {             char c = hex.charAt(i);             switch (c) {                 case '0':                     result += "0000";                     break;                 case '1':                     result += "0001";                     break;                 case '2':                     result += "0010";                     break;                 case '3':                     result += "0011";                     break;                 case '4':                     result += "0100";                     break;                 case '5':                     result += "0101";                     break;                 case '6':                     result += "0110";                     break;                 case '7':                     result += "0111";                     break;                 case '8':                     result += "1000";                     break;                 case '9':                     result += "1001";                     break;                 case 'A':                     result += "1010";                     break;                 case 'B':                     result += "1011";                     break;                 case 'C':                     result += "1100";                     break;                 case 'D':                     result += "1101";                     break;                 case 'E':                     result += "1110";                     break;                 case 'F':                     result += "1111";                     break;             }         }         return result;     }       /**      * ASCII码字符串转数字字符串      *      * @param String      *            ASCII字符串      * @return 字符串      */     public static String AsciiStringToString(String content) {         String result = "";         int length = content.length() / 2;         for (int i = 0; i < length; i++) {             String c = content.substring(i * 2, i * 2 + 2);             int a = hexStringToAlgorism(c);             char b = (char) a;             String d = String.valueOf(b);             result += d;         }         return result;     }       /**      * 将十进制转换为指定长度的十六进制字符串      *      * @param algorism      *            int 十进制数字      * @param maxLength      *            int 转换后的十六进制字符串长度      * @return String 转换后的十六进制字符串      */     public static String algorismToHexString(int algorism, int maxLength) {         String result = "";         result = Integer.toHexString(algorism);           if (result.length() % 2 == 1) {             result = "0" + result;         }         return patchHexString(result.toUpperCase(), maxLength);     }       /**      * 字节数组转为普通字符串（ASCII对应的字符）      *      * @param bytearray      *            byte[]      * @return String      */     public static String byteToString(byte[] bytearray) {         String result = "";         char temp;           int length = bytearray.length;         for (int i = 0; i < length; i++) {             temp = (char) bytearray[i];             result += temp;         }         return result;     }       /**      * 二进制字符串转十进制      *      * @param binary      *            二进制字符串      * @return 十进制数值      */     public static int binaryToAlgorism(String binary) {         int max = binary.length();         int result = 0;         for (int i = max; i > 0; i--) {             char c = binary.charAt(i - 1);             int algorism = c - '0';             result += Math.pow(2, max - i) * algorism;         }         return result;     }       /**      * 十进制转换为十六进制字符串      *      * @param algorism      *            int 十进制的数字      * @return String 对应的十六进制字符串      */     public static String algorismToHEXString(int algorism) {         String result = "";         result = Integer.toHexString(algorism);           if (result.length() % 2 == 1) {             result = "0" + result;           }         result = result.toUpperCase();           return result;     }       /**      * HEX字符串前补0，主要用于长度位数不足。      *      * @param str      *            String 需要补充长度的十六进制字符串      * @param maxLength      *            int 补充后十六进制字符串的长度      * @return 补充结果      */     static public String patchHexString(String str, int maxLength) {         String temp = "";         for (int i = 0; i < maxLength - str.length(); i++) {             temp = "0" + temp;         }         str = (temp + str).substring(0, maxLength);         return str;     }       /**      * 将一个字符串转换为int      *      * @param s      *            String 要转换的字符串      * @param defaultInt      *            int 如果出现异常,默认返回的数字      * @param radix      *            int 要转换的字符串是什么进制的,如16 8 10.      * @return int 转换后的数字      */     public static int parseToInt(String s, int defaultInt, int radix) {         int i = 0;         try {             i = Integer.parseInt(s, radix);         } catch (NumberFormatException ex) {             i = defaultInt;         }         return i;     }       /**      * 将一个十进制形式的数字字符串转换为int      *      * @param s      *            String 要转换的字符串      * @param defaultInt      *            int 如果出现异常,默认返回的数字      * @return int 转换后的数字      */     public static int parseToInt(String s, int defaultInt) {         int i = 0;         try {             i = Integer.parseInt(s);         } catch (NumberFormatException ex) {             i = defaultInt;         }         return i;     }       /**      * 十六进制串转化为byte数组      *      * @return the array of byte      */     public static byte[] hexToByte(String hex)             throws IllegalArgumentException {         if (hex.length() % 2 != 0) {             throw new IllegalArgumentException();         }         char[] arr = hex.toCharArray();         byte[] b = new byte[hex.length() / 2];         for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {             String swap = "" + arr[i++] + arr[i];             int byteint = Integer.parseInt(swap, 16) & 0xFF;             b[j] = new Integer(byteint).byteValue();         }         return b;     }       /**      * 字节数组转换为十六进制字符串      *      * @param b      *            byte[] 需要转换的字节数组      * @return String 十六进制字符串      */     public static String byteToHex(byte b[]) {         if (b == null) {             throw new IllegalArgumentException(                     "Argument b ( byte array ) is null! ");         }         String hs = "";         String stmp = "";         for (int n = 0; n < b.length; n++) {             stmp = Integer.toHexString(b[n] & 0xff);             if (stmp.length() == 1) {                 hs = hs + "0" + stmp;             } else {                 hs = hs + stmp;             }         }         return hs.toUpperCase();     }       public static byte[] subByte(byte[] input, int startIndex, int length) {         byte[] bt = new byte[length];         for (int i = 0; i < length; i++) {             bt[i] = input[i + startIndex];         }         return bt;     } }