字符串加密方法

cxw928
等级:
可用分等级：长工
总技术分：111
总技术分排名：83869

发表于：2008-08-22 14:57:305楼得分:50

我做过类似的项目

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;

public class test {
public static void main(String[] args) {
try {
test t = new test();
Cipher cip = Cipher.getInstance("DES");
//"12345678"是密码
cip.init(Cipher.ENCRYPT_MODE,t.getKey("12345678"));
System.out.println("hello!");

byte[] bstr = cip.doFinal("hello!".getBytes());
System.out.println("加密后的内容："+bstr);

cip.init(Cipher.DECRYPT_MODE, t.getKey("12345678"));
String unStr = new String(cip.doFinal(bstr));
System.out.println("解密后的内容"+unStr);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BadPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public SecretKey getKey(String password){
DESKeySpec spec;
SecretKey key = null;
try {
spec = new DESKeySpec(password.getBytes("UTF-8"));
SecretKeyFactory kf = SecretKeyFactory.getInstance("DES");
key = kf.generateSecret(spec);
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidKeySpecException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return key;

}

}

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