DESUtils.java
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/**
* Copyright 2015-2025 FLY的狐狸(email:jflyfox@sina.com qq:369191470).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.jflyfox.util.encrypt;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
/**
* DES加密
*/
public class DESUtils {
// 指定DES加密解密所用的密钥
private static Key key;
/**
* 加密key为空
*/
public DESUtils() {
setkey("flyoffox");
}
/**
* 设置加密key
*
* @param keyStr
* 加密key值
*/
public DESUtils(String keyStr) {
setkey(keyStr);
}
/**
* 设置加密的校验码
*
* @Date:2012-10-16 下午04:25:13
* @ClassDescription:
*/
private void setkey(String keyStr) {
try {
DESKeySpec objDesKeySpec = new DESKeySpec(keyStr.getBytes("UTF-8"));
SecretKeyFactory objKeyFactory = SecretKeyFactory.getInstance("DES");
key = objKeyFactory.generateSecret(objDesKeySpec);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
// 对字符串进行DES加密，返回BASE64编码的加密字符串
public final String encryptString(String str) {
byte[] bytes = str.getBytes();
try {
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptStrBytes = cipher.doFinal(bytes);
return new String(Base64.encodeBase64(encryptStrBytes), "UTF-8");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
// 对BASE64编码的加密字符串进行解密，返回解密后的字符串
public final String decryptString(String str) {
try {
byte[] bytes = Base64.decodeBase64(str.getBytes("UTF-8"));
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
bytes = cipher.doFinal(bytes);
return new String(bytes);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 测试
*
* 2014年6月9日 下午12:37:59
* flyfox 330627517@qq.com
* @param args
*/
public static void main(String[] args) {
DESUtils des = new DESUtils("aaaaaaaa");
String test = des.encryptString("你好123123asdasdasd阿三大声大声道，。，，。，");
System.out.println(test);
System.out.println(des.decryptString(test));
}
}