package com.text;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class DESUtils {
private static Key key;
private static String KEY_STR = "myKey";
static {
try {
KeyGenerator generator = KeyGenerator.getInstance("DES");
generator.init(new SecureRandom(KEY_STR.getBytes()));
key = generator.generateKey();
generator = null;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 对str进行DES加密
*
* @param str
* @return
*/
public static String getEncryptString(String str) {
BASE64Encoder base64en = new BASE64Encoder();
try {
byte[] strBytes = str.getBytes("UTF8");
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptStrBytes = cipher.doFinal(strBytes);
return base64en.encode(encryptStrBytes);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 对str进行DES解密
*
* @param str
* @return
*/
public static String getDecryptString(String str) {
BASE64Decoder base64De = new BASE64Decoder();
try {
byte[] strBytes = base64De.decodeBuffer(str);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decryptStrBytes = cipher.doFinal(strBytes);
return new String(decryptStrBytes, "UTF8");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) throws Exception {
if (args == null || args.length < 1) {
System.out.println("请输入要加密的字符，用空格分隔.");
} else {
for (String arg : args) {
System.out.println(arg + ":" + getEncryptString(arg));
}
}
//System.out.println(getDecryptString("WnplV/ietfQ="));
//System.out.println(getDecryptString("gJQ9O+q34qk="));
}
}
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