將加密應用于字符串后我遇到了問題，我想將該 encrypted_string 解密為普通字符串，但這些示例均無效。此外，他們正在為字節數組代碼工作，Byte_array 加密和解密非常好，但我需要它為字符串工作。例如，我已經嘗試過， How to encrypt and decrypt String with my passphrase in Java (Pc not mobile platform)?public static String encrypt(String strClearText,String strKey) throws Exception{ String strData=""; try { SecretKeySpec skeyspec=new SecretKeySpec(strKey.getBytes(),"Blowfish"); Cipher cipher=Cipher.getInstance("Blowfish"); cipher.init(Cipher.ENCRYPT_MODE, skeyspec); byte[] encrypted=cipher.doFinal(strClearText.getBytes()); strData=new String(encrypted); } catch (Exception e) { e.printStackTrace(); throw new Exception(e); } return strData;}public static String decrypt(String strEncrypted,String strKey) throws Exception{ String strData=""; try { SecretKeySpec skeyspec=new SecretKeySpec(strKey.getBytes(),"Blowfish"); Cipher cipher=Cipher.getInstance("Blowfish"); cipher.init(Cipher.DECRYPT_MODE, skeyspec); byte[] decrypted=cipher.doFinal(strEncrypted.getBytes()); strData=new String(decrypted); } catch (Exception e) { e.printStackTrace(); throw new Exception(e); } return strData;}Stringbyte[]然后轉換不能byte[]正常string工作？
2 回答
白衣非少年
TA貢獻1155條經驗 獲得超0個贊
您可以使用 Base64 enocde 和解碼。
例子：
package test;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
public class Test2 {
public static void main(String[] args) throws Exception {
String key = "abc123!";
String encrypted = encrypt("test", key);
System.out.println(encrypted);
String decrypted = decrypt(encrypted, key);
System.out.println(decrypted);
}
public static String encrypt(String strClearText, String strKey) throws Exception {
String strData = "";
try {
SecretKeySpec skeyspec = new SecretKeySpec(strKey.getBytes(), "Blowfish");
Cipher cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.ENCRYPT_MODE, skeyspec);
byte[] encrypted = cipher.doFinal(Base64.getDecoder().decode(strClearText));
strData = Base64.getEncoder().encodeToString(encrypted);
} catch (Exception e) {
e.printStackTrace();
throw new Exception(e);
}
return strData;
}
public static String decrypt(String strEncrypted, String strKey) throws Exception {
String strData = "";
try {
SecretKeySpec skeyspec = new SecretKeySpec(strKey.getBytes(), "Blowfish");
Cipher cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.DECRYPT_MODE, skeyspec);
byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(strEncrypted));
strData = Base64.getEncoder().encodeToString(decrypted);
} catch (Exception e) {
e.printStackTrace();
throw new Exception(e);
}
return strData;
}
}
輸出：
fsmwp8c1n9w=
測試
四季花海
TA貢獻1811條經驗 獲得超5個贊
這里簡單的編解碼（上面kitkat）
寫這個類，只調用方法
class EncodeDecode
{
public String encodeString(String text)
{
String b64;
byte[] data=new byte[0];
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT)
{
data=text.getBytes(StandardCharsets.UTF_8);
b64=Base64.encodeToString(data,Base64.DEFAULT);
}
return b64;
}
public String decodeString(String text)
{
String deString;
if(android.os.Build.VERSION.SDK_INT>=android.os.Build.VERSION_CODES.KITKAT)
{
byte[] data2=Base64.decode(base64,Base64.DEFAULT);
deString=new String (data2,StandardCharsets.UTF_8);
}
return deString;
}
}
我希望這個答案能幫助你..
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