一、环境搭建：

1、先安装开发工具：

推荐idea,下载macOS操作系统

idea激活码点击这里汇聚了很多

2、安装Java环境jdk

下载链接

2.1、一路双击，继续安装，输入密码就可以安装成功。2.2、检查终端Java是否安装成功

3、安装go环境

官网下载安装包

安装完毕会在home目录下usr/local/go默认的安装目录。然后这个时候可以配置下环境变量

~/.bash_profile
export GOPATH=$HOME/go
保存退出，然后激活配置文件
source ~/.bash_profile
测试下是否安装成功
这里注意如果提示你权限不够的话需要使用sudo去执行
比如你现在创建个文件夹在go的安装目录s r c下面
sudo mkdir test
sudo vim hello.go
sudo build hello.go
sudo go run hello.go
然后可以看到输出了hello world。

4、开发加密Java类

package com.xcxyz.cipher;

import javax.crypto.Cipher;
import java.security.Key;
import java.security.Security;

public class CipherEncryptUtil {
    private Cipher encryptCipher = null;

    public static String byteArr2HexStr(byte[] arrB) throws Exception {
        int iLen = arrB.length;
        StringBuilder sb = new StringBuilder(iLen * 2);
        for (int i = 0; i < iLen; i++) {
            int intTmp = arrB[i];
            while (intTmp < 0) {
                intTmp = intTmp + 256;
            }
            if (intTmp < 16) {
                sb.append("0");
            }
            sb.append(Integer.toString(intTmp, 16));
        }
        return sb.toString();
    }

    public CipherEncryptUtil(String strKey) throws Exception {
        Security.addProvider(new com.sun.crypto.provider.SunJCE());
        Key key = getKey(strKey.getBytes());
        encryptCipher = Cipher.getInstance("DES");
        encryptCipher.init(Cipher.ENCRYPT_MODE, key);
    }

    public byte[] encrypt(byte[] arrB) throws Exception {
        return encryptCipher.doFinal(arrB);
    }

    public String encrypt(String strIn) throws Exception {
        return byteArr2HexStr(encrypt(strIn.getBytes()));
    }

    private Key getKey(byte[] arrBTmp) throws Exception {
        byte[] arrB = new byte[8];
        for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
            arrB[i] = arrBTmp[i];
        }
        Key key = new javax.crypto.spec.SecretKeySpec(arrB, "DES");
        return key;
    }

    public static void main(String[] args) throws Exception {
        CipherEncryptUtil desUtils = new CipherEncryptUtil("秘钥");
        String encryptStr = desUtils.encrypt("加密字符串");
        System.out.println(encryptStr);
    }
}

5、开发解密Java类

package com.xcxyz.cipher;

import javax.crypto.Cipher;
import java.security.Key;
import java.security.Security;

public class CipherDecruptUtil {
    private Cipher decryptCipher = null;

    public static byte[] hexStr2ByteArr(String strIn) throws Exception {
        byte[] arrB = strIn.getBytes();
        int iLen = arrB.length;
// 两个字符表示一个字节，所以字节数组长度是字符串长度除以2
        byte[] arrOut = new byte[iLen / 2];
        for (int i = 0; i < iLen; i = i + 2) {
            String strTmp = new String(arrB, i, 2);
            arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
        }
        return arrOut;
    }

    public CipherDecruptUtil(String strKey) throws Exception {
        Security.addProvider(new com.sun.crypto.provider.SunJCE());
        Key key = getKey(strKey.getBytes());
        decryptCipher = Cipher.getInstance("DES");
        decryptCipher.init(Cipher.DECRYPT_MODE, key);
    }

    public byte[] decrypt(byte[] arrB) throws Exception {
        return decryptCipher.doFinal(arrB);
    }

    public String decrypt(String strIn) throws Exception {
        return new String(decrypt(hexStr2ByteArr(strIn)));
    }


    private Key getKey(byte[] arrBTmp) throws Exception {
        byte[] arrB = new byte[8];
        for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
            arrB[i] = arrBTmp[i];
        }
        Key key = new javax.crypto.spec.SecretKeySpec(arrB, "DES");
        return key;
    }


    public static void main(String[] args) throws Exception {
        CipherDecruptUtil desUtils = new CipherDecruptUtil("秘钥");
        String encryptStr = desUtils.decrypt("bfffa5db87cf3cdd1d75d86e3738ff6f");
        System.out.println(encryptStr);
    }
}

6、写一个main函数

package com.xcxyz;

import com.xcxyz.cipher.CipherEncryptUtil;

public class Main {

    public static void main(String[] args) throws Exception{
	// write your code here
        if (args.length != 2){
            throw new Exception("must input two args for key and strIn");
        }
        CipherEncryptUtil encrypUtils = new CipherEncryptUtil(args[0]);
        String encryptStr = encrypUtils.encrypt(args[1]);
        System.out.println(encryptStr);

//        CipherEncryptUtil encrypUtils = new CipherEncryptUtil("秘钥");
//        String encryptStr = encrypUtils.encrypt("加密字符串");
//        System.out.println(encryptStr);
//
//        CipherDecruptUtil decruptUtils = new CipherDecruptUtil("秘钥");
//        String decryptStr = decruptUtils.decrypt(encryptStr);
//        System.out.println(decryptStr);
    }
}

7、执行idea导出Java可执行jar包

1、首先点开File文件下的Project Structure
2、选择Artifacts—->点击蓝色的“+”
3、选中jar—>From modules with dependencies
4、注意Main Class的添加，此处就是选择你要生成的jar包的工程文件
5、.MF文件就是你生成jar包生成的签名信息，第一次生成jar包，会生成相应的.MF签名文件，若第二次再生成jar包，会报错，说已经存在，只需将.MF文件删除即可
6、选择输出的目录，即Output Directory
7.勾选Build on make 点击ok
8、Build——>Make Project

验证jar包执行结果

8、将该jar包放入go项目的文件下如下图我的go项目名称TheWayToGo

执行成功，则加密完成，解密同样道理，快去试试吧。