pri_encrypter.java

非常有用的加密解密程序

package ss.logic;

import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

public class Pri_Encrypter {
	public static void main(String[] args) throws Exception{
		a.encrypt("ADDFDFDF");
		a.decrypt("sdsd");
	}
	
	static Pri_Encrypter a = new Pri_Encrypter();
	
	
	
	public void encrypt(String plainTextString) throws Exception{
		plainTextStr = plainTextString;
		plainText = plainTextStr.getBytes("UTF8");
		System.out.println(plainTextStr);
	
		keyGen = KeyGenerator.getInstance("AES");
		keyGen.init(128);
		key = keyGen.generateKey();

		cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
   
		cipher.init(Cipher.ENCRYPT_MODE,key);
		realCipherText = cipher.doFinal(plainText);
		System.out.println(new String(realCipherText, "UTF8"));
	}
	
	public void decrypt(String cipherString) throws Exception{
		
			cipherText = cipherString.getBytes();	
			cipher.init(Cipher.DECRYPT_MODE,key);
			newPlainText = cipher.doFinal(cipherText);
			newPlainTextStr = new String(newPlainText, "UTF8");
			System.out.println(newPlainTextStr);

	}
	
	private String plainTextStr;
	private byte[] plainText;
	private KeyGenerator keyGen;
	private Key key;
	private Cipher cipher;
	private byte[] cipherText;
	private byte[] realCipherText;
	private byte[] newPlainText;
	private String newPlainTextStr;

	public String getRealCipherText(){
		return new String(realCipherText);
	}

	public String getNewPlainTextStr() {
		return newPlainTextStr;
	}
	
}