DES 加密

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * 
Title: URL 参数加密解密 
 *
 * 
Description: 
 *
 * 
Company: 
 *
 * @author 
 * 
 * @since：2020-7-28 下午02:30:59
 * 
 */

public class DESEncryptionUtils {
	// 密码
	public static final String PWD = "abcd9527";
	// 1 加密
	public static final int FLAG_1 = 1;
    // 2 解密
	public static final int FLAG_2 = 2;
	
    public static String crypt(String content,String password,int i){
        try {
            KeyGenerator generator = KeyGenerator.getInstance("AES");
            generator.init(new SecureRandom(password.getBytes()));
            Key key = generator.generateKey();
            generator = null;
            if(i == 1){
            	// 在明文后面加个时间戳
            	content = content + "_" + System.currentTimeMillis();
                return getEncString(content,key);
            }
            else if(i == 2){
                return getDesString(content,key);
            }
        } catch (Exception e) {
            return null;
        }
        return null;
    }

    /**
     * 加密String明文输入,String密文输出
     *
     * @param strMing
     * @return
     */
    private static String getEncString(String strMing,Key key) {
        byte[] byteMi = null;
        byte[] byteMing = null;
        String strMi = "";
        BASE64Encoder base64en = new BASE64Encoder();
        try {
            byteMing = strMing.getBytes("UTF8");
            byteMi = getEncCode(byteMing,key);
            strMi = base64en.encode(byteMi);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            base64en = null;
            byteMing = null;
            byteMi = null;
        }
        return strMi;
    }

    /**
     * 解密 以String密文输入,String明文输出
     *
     * @param strMi
     * @return
     */
    private static String getDesString(String strMi, Key key) {
        BASE64Decoder base64De = new BASE64Decoder();
        byte[] byteMing = null;
        byte[] byteMi = null;
        String strMing = "";
        try {
            byteMi = base64De.decodeBuffer(strMi);
            byteMing = getDesCode(byteMi,key);
            strMing = new String(byteMing, "UTF8");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            base64De = null;
            byteMing = null;
            byteMi = null;
        }
        return strMing;
    }

    /**
     * 加密以byte[]明文输入,byte[]密文输出
     *
     * @param byteS
     * @return
     */
    private static byte[] getEncCode(byte[] byteS,Key key) {
        byte[] byteFina = null;
        Cipher cipher;
        try {
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byteFina = cipher.doFinal(byteS);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    /**
     * 解密以byte[]密文输入,以byte[]明文输出
     *
     * @param byteD
     * @return
     */
    private static byte[] getDesCode(byte[] byteD,Key key) {
        Cipher cipher;
        byte[] byteFina = null;
        try {
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);
            byteFina = cipher.doFinal(byteD);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cipher = null;
        }
        return byteFina;
    }

    public static void main(String[] args) {
        System.out.println(DESEncryptionUtils.crypt("uno=system1_112121", "bbbbb", 1));
        System.out.println(DESEncryptionUtils.crypt("EmX/Uae0owcwL74HoVw0gQ==", "bbbb", 2));
    }

}