最近项目需要选择一套对称加密算法，来满足前后端之间的加解密操作。初步打算前端使用crypto-js来实现，后端使用java本身的加密算法实现,但遇到了一个问题：java本身只支持NoPadding和PKCS5Padding,而crypto-js提供的padding方式没有PKCS5Padding，所以不得以，前后端最终使用PKCS7Padding来实现功能.因此只能通过引入第三方jar包的方式让jave支持pkcs7padding

引入依赖

<dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk16</artifactId> <version>1.46</version> </dependency>

完整代码

package com.hzjd.miniapp.util;import java.security.Security;import java.security.spec.AlgorithmParameterSpec;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;import org.bouncycastle.jce.provider.BouncyCastleProvider;import com.sun.istack.internal.NotNull;public class AESUtil { private static final String CHARSET_NAME = "UTF-8"; private static final String AES_NAME = "AES"; // 加密模式 public static final String ALGORITHM = "AES/CBC/PKCS7Padding"; // 密钥 public static final String KEY = "1954682168745975"; // 偏移量 public static final String IV = "1954682168745975"; static { Security.addProvider(new BouncyCastleProvider()); } /** * 加密 * * @param content * @param key * @return */ public String encrypt(@NotNull String content) { byte[] result = null; try { Cipher cipher = Cipher.getInstance(ALGORITHM); SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(CHARSET_NAME), AES_NAME); AlgorithmParameterSpec paramSpec = new IvParameterSpec(IV.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, keySpec, paramSpec); result = cipher.doFinal(content.getBytes(CHARSET_NAME)); } catch (Exception e) { e.printStackTrace(); } return Base64.encodeBase64String(result); } /** * 解密 * * @param content * @param key * @return */ public String decrypt(@NotNull String content) { try { Cipher cipher = Cipher.getInstance(ALGORITHM); SecretKeySpec keySpec = new SecretKeySpec(KEY.getBytes(CHARSET_NAME), AES_NAME); AlgorithmParameterSpec paramSpec = new IvParameterSpec(IV.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keySpec, paramSpec); return new String(cipher.doFinal(Base64.decodeBase64(content)), CHARSET_NAME); } catch (Exception e) { e.printStackTrace(); } return StringUtils.EMPTY; } public static void main(String[] args) { AESUtil aes = new AESUtil(); String contents = "121456465"; String encrypt = aes.encrypt(contents); System.out.println("加密后:" + encrypt); String decrypt = aes.decrypt(encrypt); System.out.println("解密后:" + decrypt); }}

总结

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