java实现AES256对称加解密工具类-编程知识

java实现AES256对称加解密工具类

一、引入依赖包

引入相关依赖包

<dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk15on</artifactId><version>1.70</version>
</dependency>
<!--lombok用于简化实体类开发-->
<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional>
</dependency>

二、AES256对称加解密工具类

AES256对称加解密工具类代码

package com.xz.util;import lombok.extern.slf4j.Slf4j;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Base64;import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.Security;/*** @author: xz* @since: 2024/1/11 23:03* @description:*/
@Slf4j
public class AES256Util {/*** 32位长度随机密码key*/private static final String PASSWORD = "MEqLCnG2Q0IfauMDbZq1lP46uP4BHsiv";/*** AES256加密* @param content* @return*/public static String encrypt(String content) {try {if(content == null) {return "";}//根据给定的字节数组构造一个密钥。enCodeFormat：密钥内容；"AES"：与给定的密钥内容相关联的密钥算法的名称SecretKeySpec key = new SecretKeySpec(PASSWORD.getBytes(StandardCharsets.UTF_8), "AES");//将提供程序添加到下一个可用位置Security.addProvider(new BouncyCastleProvider());//创建一个实现指定转换的 Cipher对象，该转换由指定的提供程序提供。//"AES/ECB/PKCS7Padding"：转换的名称；"BC"：提供程序的名称Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, key);byte[] byteContent = content.getBytes("utf-8");byte[] cryptograph = cipher.doFinal(byteContent);return new String(Base64.encode(cryptograph));} catch (Exception e) {log.error("AES256 加密失败：", e.getMessage());}return null;}/*** AES256解密* @param cryptograph* @return*/public static String decrypt(String cryptograph) {try {if(cryptograph == null) {return "";}SecretKeySpec key = new SecretKeySpec(PASSWORD.getBytes(StandardCharsets.UTF_8), "AES");Security.addProvider(new BouncyCastleProvider());Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, key);byte[] content = cipher.doFinal(Base64.decode(cryptograph));return new String(content);} catch (Exception e) {log.error("AES256 解密失败：", e.getMessage());}return null;}
}

三、测试类

测试代码

package com.xz.util;
/*** @author: xz* @since: 2024/1/11 23:07* @description:*/
public class AES256UtilTest {public static void main(String[] args) {String str="hello 编号 007！";System.out.println("原始内容："+str);String encrypt = AES256Util.encrypt(str);System.out.println("加密后的内容："+encrypt);String decrypt = AES256Util.decrypt(encrypt);System.out.println("解密后的内容："+decrypt);}
}