AES加解密工具类

悠悠 2024-03-30 08:45 72阅读 0赞

#### 1、加载pom依赖 ####

<dependency>
                <groupId>commons-configuration</groupId>
                <artifactId>commons-configuration</artifactId>
                <version>1.9</version>
            </dependency>
    
    
            <dependency>
                <groupId>commons-codec</groupId>
                <artifactId>commons-codec</artifactId>
                <version>1.9</version>
            </dependency>

#### 2、配置文件配置token ####

application.yml

#AES加解密所需token，自定义16位字符串
    encry.token: 1234567890123456

#### 3、编写工具类 ####

PropUtils.java

package com.zwt.utils.properties;
    
    import org.apache.commons.configuration.ConfigurationException;
    import org.apache.commons.configuration.PropertiesConfiguration;
    
    /**
     * 加载配置文件工具类
     */
    public class PropUtils {
        
        private PropertiesConfiguration props = null;
    
        private static class LazyHolder {
        
            public static final PropUtils instance = new PropUtils();
        }
    
        public static PropUtils getInstance() {
        
            return LazyHolder.instance;
        }
    
        private PropUtils() {
        
            try {
        
            //加载application.yml配置文件，这里需要根据项目替换
                props = new PropertiesConfiguration("application.yml");
                props.setThrowExceptionOnMissing(true);
            } catch (ConfigurationException e) {
        
                throw new RuntimeException(String.format("Failed to load application.yml.[exception = %s]", e.getMessage()), e);
            }
        }
    
        public String getString(String key) {
        
            return props.getString(key);
        }
    
        public String getString(String key, String defaultValue) {
        
            return props.getString(key, defaultValue);
        }
    
        public int getInt(String key) {
        
            return props.getInt(key);
        }
    
        public int getInt(String key, int defaultValue) {
        
            return props.getInt(key, defaultValue);
        }
    
        public String[] getStringArray(String key) {
        
            return props.getStringArray(key);
        }
    
        public boolean getBoolean(String key, boolean defaultValue) {
        
            return props.getBoolean(key, defaultValue);
        }
    
        public short getShort(String key, Short defaultValue) {
        
            return props.getShort(key, defaultValue);
        }
    
        public Object getProperty(String key){
        
            return props.getProperty(key);
        }
    }

EncryptUtils.java

package com.zwt.utils;
    
    import com.zwt.utils.properties.PropUtils;
    import java.util.Scanner;
    import javax.crypto.Cipher;
    import javax.crypto.spec.SecretKeySpec;
    import org.apache.commons.codec.binary.Base64;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    
    /**
     * AES加解密工具类
     */
    public class EncryptUtils {
        
    
        private static final Logger log = LoggerFactory.getLogger(EncryptUtils.class);
    
        private static String TOKEN;
    
        static {
        
            PropUtils config = PropUtils.getInstance();
            TOKEN = config.getString("encry.token");
            if (TOKEN == null || TOKEN.trim().length() != 16) {
        
                TOKEN = null;
                throw new RuntimeException(
                        "Invalid token string! Token can't be blank and length must be 16!");
            }
        }
    
        private static final SecretKeySpec key = new SecretKeySpec(TOKEN.trim().getBytes(), "AES");
    
        private static String encodeBase64(byte[] msg) {
        
            Base64 encoder = new Base64();
            return encoder.encodeToString(msg);
        }
    
        private static byte[] decodeBase64(String msg) {
        
            Base64 decoder = new Base64();
            return decoder.decode(msg);
        }
    
        /**
         * 加密
         * @param p 明文
         * @return
         * @throws Exception
         */
        public static String encrypt(String p) throws Exception {
        
            if (TOKEN == null) {
        
                throw new RuntimeException("Can't encrypt password because token is invalid!");
            }
            Cipher cipher = Cipher.getInstance("AES");
            byte[] byteContent = p.getBytes("UTF-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] result = cipher.doFinal(byteContent);
            return encodeBase64(result);
        }
    
        /**
         * 解密
         * @param p 密文
         * @return
         * @throws Exception
         */
        public static String decrypt(String p) throws Exception {
        
            if (TOKEN == null) {
        
                throw new RuntimeException("Can't decrypt password because token is invalid!");
            }
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);
            return new String(cipher.doFinal(decodeBase64(p)), "UTF-8");
        }
    
        /**
         * 加密
         * @param p 原文
         * @param token
         * @return
         * @throws Exception
         */
        public static String encrypt(String p, String token) throws Exception {
        
            SecretKeySpec key = new SecretKeySpec(token.trim().getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES");
            byte[] byteContent = p.getBytes("UTF-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] result = cipher.doFinal(byteContent);
            return encodeBase64(result);
        }
    
        /**
         * 解密
         * @param p 密文
         * @param token
         * @return
         * @throws Exception
         */
        public static String decrypt(String p, String token) throws Exception {
        
            SecretKeySpec key = new SecretKeySpec(token.trim().getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);
            return new String(cipher.doFinal(decodeBase64(p)), "UTF-8");
        }
    
        // 测试
        public static void main(String[] args) throws Exception {
        
    
            log.info("Please input original password: ");
            //原始字符串
            try (Scanner in = new Scanner(System.in)) {
        
                // 加密后
                String encryptedStr = encrypt(in.nextLine());
                log.info("Encrypted password: {}", encryptedStr);
    
                //解密后：
                log.info("Original password: {}", decrypt(encryptedStr));
            } catch (Exception e) {
        
                log.error("Encrypt/Decrypt error:{}", e.getMessage());
            }
    
        }
    }

#### 4、运行结果 ####

![在这里插入图片描述][41d31b8c48e2482186f7d0d2eca17447.png]

[41d31b8c48e2482186f7d0d2eca17447.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/7eb98ffa4867477c9cbb1bcd343ddcc8.png