Java加密解密工具类

package com.sjzx.common.util;

import java.lang.reflect.Method;
import java.security.Key;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * Java加密解密工具.3DES SHA1 MD5 BASE64编码 AES加密 Title: EnDecryptUtil.java
 * Description:
 * 
 * @author xwp
 * @date 2017年4月10日下午1:20:19
 * @version 1.0
 */
public class EnDecryptUtil {
	// 无需创建对象
	private EnDecryptUtil() {
		
	}

	public static void main(String[] args) {
//		byte[] arr1 = new byte[] { 1, 2, 3, 4, 5, 6, 7, 22 };
//		System.out.println("SHA1 加密 ： " + SHA1Bit(arr1));
//		System.out.println("SHA1 解密 ： " + SHA1("arr1"));
//		System.out.println("MD5 加密 ： " + MD5Bit(arr1));
//		System.out.println("MD5 加密 ： " + MD5("arr1"));// 54f04b52a75382a157f69457810c41bd
//		System.out.println("BASE64 加密 ： " + encodeBASE64("arr1"));
//		System.out.println("BASE64 解密 ： " + decodeBASE64(encodeBASE64("arr1")));
//		System.out.println("3DES 加密 ： " + d3esEncode("arr1"));
//		System.out.println("d3esDecode(decodeBASE64(encodeBASE64(d3esEncode('arr1')))) = "
//				+ d3esDecode(decodeBASE64(encodeBASE64(d3esEncode("arr1")))));
//		System.out.println("3DES 解密 ： " + d3esDecode(d3esEncode("arr1")));
//		System.out.println("AES 加密 ： " + encryptBitAES(arr1, "arr1"));
//		System.out.println("AES 解密 ： " + decryptBitAES(encryptBitAES(arr1, "arr1"), "arr1"));
		String password = EnDecryptUtil.encodeBASE64(EnDecryptUtil.d3esEncode("111111"));
		System.out.println(password);

	}

	/**
	 * SHA1加密Bit数据
	 * 
	 * @param source
	 *            byte数组
	 * @return 加密后的byte数组
	 */
	public static byte[] SHA1Bit(byte[] source) {
		try {
			MessageDigest sha1Digest = MessageDigest.getInstance("SHA-1");
			sha1Digest.update(source);
			byte targetDigest[] = sha1Digest.digest();
			return targetDigest;
		} catch (NoSuchAlgorithmException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * SHA1加密字符串数据
	 * 
	 * @param source
	 *            要加密的字符串
	 * @return 加密后的字符串
	 */
	public static String SHA1(String source) {
		return byte2HexStr(SHA1Bit(source.getBytes()));
	}

	/**
	 * MD5加密Bit数据
	 * 
	 * @param source
	 *            byte数组
	 * @return 加密后的byte数组
	 */
	public static byte[] MD5Bit(byte[] source) {
		try {
			// 获得MD5摘要算法的 MessageDigest对象
			MessageDigest md5Digest = MessageDigest.getInstance("MD5");
			// 使用指定的字节更新摘要
			md5Digest.update(source);
			// 获得密文
			return md5Digest.digest();
		} catch (NoSuchAlgorithmException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * MD5加密字符串,32位长
	 * 
	 * @param source
	 *            要加密的内容
	 * @return 加密后的内容
	 */
	public static String MD5(String source) {
		return byte2HexStr(MD5Bit(source.getBytes()));
	}

	/**
	 * BASE64编码
	 * 
	 * @param source
	 *            要编码的字符串
	 * @return 编码过的字符串
	 */
	public static String encodeBASE64(String source) {
		Class clazz = null;
		Method encodeMethod = null;
		try {// 优先使用第三方库
			clazz = Class.forName("org.apache.commons.codec.binary.Base64");
			encodeMethod = clazz.getMethod("encodeBase64", byte[].class);
			System.out.println("encodeBASE64-->" + clazz);
			System.out.println("encodeMethod-->" + encodeMethod);
			// 反射方法 静态方法执行无需对象
			return new String((byte[]) encodeMethod.invoke(null, source.getBytes()));
		} catch (ClassNotFoundException e) {
			String vm = System.getProperty("java.vm.name");
			System.out.println(vm);
			try {
				if ("Dalvik".equals(vm)) {// Android
					clazz = Class.forName("android.util.Base64");
					// byte[] Base64.encode(byte[] input,int flags)
					encodeMethod = clazz.getMethod("encode", byte[].class, int.class);
					System.out.println("encodeBASE64-->" + clazz);
					System.out.println("encodeMethod-->" + encodeMethod);
					return new String((byte[]) encodeMethod.invoke(null, source.getBytes(), 0));
				} else {// JavaSE/JavaEE
					clazz = Class.forName("sun.misc.BASE64Encoder");
					encodeMethod = clazz.getMethod("encode", byte[].class);
					System.out.println("encodeBASE64-->" + clazz);
					System.out.println("encodeMethod-->" + encodeMethod);
					return (String) encodeMethod.invoke(clazz.newInstance(), source.getBytes());
				}
			} catch (ClassNotFoundException e1) {
				return null;
			} catch (Exception e1) {
				return null;
			}
		} catch (Exception e) {
			return null;
		}
	}

	/**
	 * BASE64解码
	 * 
	 * @param encodeSource
	 *            编码过的字符串
	 * @return 编码前的字符串
	 */
	public static String decodeBASE64(String encodeSource) {
		Class clazz = null;
		Method decodeMethod = null;

		try {// 优先使用第三方库
			clazz = Class.forName("org.apache.commons.codec.binary.Base64");
			decodeMethod = clazz.getMethod("decodeBase64", byte[].class);
			System.out.println("decodeBASE64-->" + clazz);
			System.out.println("decodeMethod-->" + decodeMethod);
			// 反射方法 静态方法执行无需对象
			return new String((byte[]) decodeMethod.invoke(null, encodeSource.getBytes()));
		} catch (ClassNotFoundException e) {
			String vm = System.getProperty("java.vm.name");
			System.out.println(vm);
			try {
				if ("Dalvik".equals(vm)) {// Android
					clazz = Class.forName("android.util.Base64");
					// byte[] Base64.decode(byte[] input, int flags)
					decodeMethod = clazz.getMethod("decode", byte[].class, int.class);
					System.out.println("decodeBASE64-->" + clazz);
					System.out.println("decodeMethod-->" + decodeMethod);
					return new String((byte[]) decodeMethod.invoke(null, encodeSource.getBytes(), 0));
				} else { // JavaSE/JavaEE
					clazz = Class.forName("sun.misc.BASE64Decoder");
					decodeMethod = clazz.getMethod("decodeBuffer", String.class);
					System.out.println("decodeBASE64-->" + clazz);
					System.out.println("decodeMethod-->" + decodeMethod);
					return new String((byte[]) decodeMethod.invoke(clazz.newInstance(), encodeSource));
				}
			} catch (ClassNotFoundException e1) {
				return null;
			} catch (Exception e1) {
				return null;
			}
		} catch (Exception e) {
			return null;
		}
	}

	/**
	 * AES加密
	 * 
	 * @param content
	 *            待加密的内容
	 * @param password
	 *            加密密码
	 * @return
	 */
	public static byte[] encryptBitAES(byte[] content, String password) {
		try {
			Cipher encryptCipher = Cipher.getInstance("AES/ECB/PKCS5Padding");// 创建密码器
			encryptCipher.init(Cipher.ENCRYPT_MODE, getKey(password));// 初始化
			byte[] result = encryptCipher.doFinal(content);
			return result; // 加密
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		// return null;
	}

	/**
	 * AES解密
	 * 
	 * @param content
	 *            待解密内容
	 * @param password
	 *            解密密钥
	 * @return
	 */
	public static byte[] decryptBitAES(byte[] content, String password) {
		try {
			Cipher decryptCipher = Cipher.getInstance("AES/ECB/PKCS5Padding");// 创建密码器
			decryptCipher.init(Cipher.DECRYPT_MODE, getKey(password));// 初始化
			byte[] result = decryptCipher.doFinal(content);
			return result; // 加密结果
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		// return null;
	}

	/**
	 * AES字符串加密
	 * 
	 * @param content
	 *            待加密的内容
	 * @param password
	 *            加密密码
	 * @return
	 */
	public static String encryptAES(String content, String password) {
		return byte2HexStr(encryptBitAES(content.getBytes(), password));
	}

	/**
	 * AES字符串解密
	 * 
	 * @param content
	 *            待解密内容
	 * @param password
	 *            解密密钥
	 * @return
	 */
	public static String decryptAES(String content, String password) {
		return new String(decryptBitAES(hexStr2Bytes(content), password));
	}

	/**
	 * 从指定字符串生成密钥
	 * 
	 * @param password
	 *            构成该秘钥的字符串
	 * @return 生成的密钥
	 * @throws NoSuchAlgorithmException
	 */
	private static Key getKey(String password) throws NoSuchAlgorithmException {
		SecureRandom secureRandom = new SecureRandom(password.getBytes());
		// 生成KEY
		KeyGenerator kgen = KeyGenerator.getInstance("AES");
		kgen.init(128, secureRandom);
		SecretKey secretKey = kgen.generateKey();
		byte[] enCodeFormat = secretKey.getEncoded();
		// 转换KEY
		SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
		return key;
	}

	/**
	 * 将byte数组转换为表示16进制值的字符串. 如：byte[]{8,18}转换为：0812 和 byte[]
	 * hexStr2Bytes(String strIn) 互为可逆的转换过程.
	 * 
	 * @param bytes
	 *            需要转换的byte数组
	 * @return 转换后的字符串
	 */
	public static String byte2HexStr(byte[] bytes) {
		int bytesLen = bytes.length;
		// 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍
		StringBuffer hexString = new StringBuffer(bytesLen * 2);
		for (int i = 0; i < bytesLen; i++) {
			// 将每个字节与0xFF进行与运算，然后转化为10进制，然后借助于Integer再转化为16进制
			String hex = Integer.toHexString(bytes[i] & 0xFF);
			if (hex.length() < 2) {
				hexString.append(0);// 如果为1位 前面补个0
			}
			hexString.append(hex);
		}
		return hexString.toString();
	}

	/**
	 * 将表示16进制值的字符串转换为byte数组, 和 String byte2HexStr(byte[] bytes) 互为可逆的转换过程.
	 * 
	 * @param bytes
	 * @return 转换后的byte数组
	 */
	public static byte[] hexStr2Bytes(String strIn) {
		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;
	}

	// 密钥
	private final static String secretKey = "liuyunqiang@lx100$#365#$";
	// 向量
	private final static String iv = "01234567";
	// 加解密统一使用的编码方式
	private final static String encoding = "utf-8";

	/**
	 * 3DES加密
	 * 
	 * @param plainText
	 *            普通文本
	 * @return
	 * @throws Exception
	 */
	public static String d3esEncode(String plainText) {
		Key deskey = null;
		byte[] encryptData = null;
		try {
			DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
			SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
			deskey = keyfactory.generateSecret(spec);

			Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
			IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
			cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
			encryptData = cipher.doFinal(plainText.getBytes(encoding));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return Base64.encode(encryptData);

	}

	/**
	 * 3DES解密
	 * 
	 * @param encryptText
	 *            加密文本
	 * @return
	 * @throws Exception
	 */
	public static String d3esDecode(String encryptText) {
		Key deskey = null;
		byte[] decryptData = null;
		String result = "";
		if (null != encryptText && !"".equals(encryptText)) {
			try {
				DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
				SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
				deskey = keyfactory.generateSecret(spec);
				Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
				IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
				cipher.init(Cipher.DECRYPT_MODE, deskey, ips);

				decryptData = cipher.doFinal(Base64.decode(encryptText));
				result = new String(decryptData, encoding);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return result;
	}

}