java AES加密

使用JDK8引入的 java.util.Base64 负责base64转码
Base64Tools 工具类，AES加密要用到它，负责 byte 数组的base64编码，base64 编码的目的是消除乱码

import java.io.UnsupportedEncodingException;
import java.util.Base64;
public class Base64Tools {
    private final static Base64.Decoder decoder = Base64.getDecoder();
    private final static Base64.Encoder encoder = Base64.getEncoder();

    public static byte[] encode(byte[] content) throws UnsupportedEncodingException {
        return encoder.encode(content);
    }

    public static byte[] decode(byte[] content) throws UnsupportedEncodingException {
        return decoder.decode(content);
    }
}

AESTools 工具类，负责对 byte 数组加密和解密

import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;

public class AESTools {
    private static final Base64.Decoder decoder = Base64.getDecoder();
    private static final Base64.Encoder encoder = Base64.getEncoder();
	public static byte[] AESEncode(String password, byte[] content) {
		try {
			KeyGenerator keygen = KeyGenerator.getInstance("AES");
			SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
			random.setSeed(password.getBytes());
			keygen.init(128, random);
			SecretKey originalKey = keygen.generateKey();
			SecretKey key = new SecretKeySpec(originalKey.getEncoded(), "AES");
			Cipher cipher = Cipher.getInstance("AES");
			cipher.init(Cipher.ENCRYPT_MODE, key);
			return Base64Tools.encode(cipher.doFinal(content)); // 加密后用base64编码
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		}
		return null;
	}

	public static byte[] AESDecode(String password, byte[] content) {
		try {
			KeyGenerator keygen = KeyGenerator.getInstance("AES");
			SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
			random.setSeed(password.getBytes());
			keygen.init(128, random);
			SecretKey originalKey = keygen.generateKey();
			SecretKey key = new SecretKeySpec(originalKey.getEncoded(), "AES");
			Cipher cipher = Cipher.getInstance("AES");
			cipher.init(Cipher.DECRYPT_MODE, key);
			return cipher.doFinal(Base64Tools.decode(content));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		}
		return null;
	}

}

测试用例我从网上找了一段文字，将它加密后再解密，和原文进行对比

public class Main {
    public static void main(String[] args) throws Exception {
		String password = "passwordwhateveryouwant";
		String content = "We hold these truths to be self-evident, that all men are created equal\n我们认为下述真理是不言而喻的：人人生而平等";

		System.out.println(content);
		String encryptedString = new String(AESTools.AESEncode(password, content.getBytes()));
		System.out.println(encryptedString);
		String decryptedString = new String(AESTools.AESDecode(password, encryptedString.getBytes()));
		System.out.println(decryptedString);
		if (content.equals(decryptedString)) System.out.printf("原文和加密后再解密的结果相等");
		else System.out.printf("原文和加密后再解密的结果不相等");
    }
}

运行结果