1.為什么出現加密的過程： 就是因為防止信息被一些手段進行破解
2.如何自定義對信息進行加密處理
2.1借助于sun包
2.2 static{
Try{
KeyGenerator generator = KeyGenerator.getInstance(“DES”)
Generator.init(new SecureRandom(Key_STR.getBytes()))
Key = generator.geneartekey();
generator =null
}catch(Exceptipon o){
Throw new RuntimeException()
}
}
//加密的方法
public static String getEncryptString(String str){
BASE64Encodeer base64Encoder = new BASE64Encoder();
try{
byte[] strbytes = str.getBytes(“UTF-8”)
Cipjer cipher = Cipher.getInstance(“DES”)
cipjer.init(Cipher.ENCRYPT_MODE,key)
byte[] encryptStrBytes =cipher.doFinal()
return base64Encoder.encode(encryptStrBytes)
}catch(Exception e){
Throw new RuntimeException();
}
}
//解密的方法
public static String getDecryptString(String str){
BASE64Decoder base64Decoder = new BASE64Decoder();
Try{
byte[] strBytes = base64Decoder.decodeBuffer(str)
Cipher cipher = Cipher.getInstance(“DES”)
cipher.init(Cipher.DECRYPT_MODE,key)
byte[] decryptStrBytes = cipher.doFinal(strBytes)
return new String(decryptStrBytes,”UTF-8”)
}catch(Exception e){
}
}
