DES通用加密方法。首先，创建一个该工具类对象：如

DES des = new DES(key),其中key为位数大于8的密钥

其次，对原始信息data进行加密，直接调用encrypt方法，得到加密后的字符串，如

String encryptResult = des.encrypt(data) //得到加密后的数据字符串

最后，对加密后的字符串encryptResult解密，直接调用decrypt方法，可得到与原始数据data一致的字符串，如

String decryptResult = des.decrypt(encryptResult) //得到解密后的数据字符串

解密后的字符串decryptResult，与原始信息data一致。-General DES encryption method. First, create a class object of the tool: If DES des = new DES (key), where key is the key followed by more than 8 bits, the original information data is encrypted, encrypt method called directly to get the encrypted string such as String encryptResult = des.encrypt (data) // get the encrypted data string last, to decrypt the encrypted string encryptResult direct call decrypt method, available data consistent with the original data string, such as String decryptResult = des.decrypt (encryptResult) // get the decrypted data string decrypted string decryptResult, consistent with the original information data.