用java实现3des加密
import java.security.Key;import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESedeKeySpec;import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;/** * 加密解密工具 */public class DesEncrypt {private Key key;private static final String KEY_ALGORITHM = "DESede";private static final String CIPHER_ALGORITHM = "DESede/ECB/PKCS5Padding";/** * 默认构造函数 */public DesEncrypt() {}/** * 构造函数,初始化Key * @param keyStore */public DesEncrypt(String keyStore) {this.toKey(keyStore);}/** * 初始化Key对象 * @param keyText * @return */public void toKey(String keyText) {DESedeKeySpec dks;SecretKeyFactory factory =null;if(check(keyText)){try {dks = new DESedeKeySpec(keyText.getBytes());factory= SecretKeyFactory.getInstance(KEY_ALGORITHM);this.key = factory.generateSecret(dks);} catch (Exception e) {e.printStackTrace();}}}/** * * @param 密钥keyText * @return 校验密钥格式是否通过 */public boolean check(String keyText){boolean flag = false ;if(keyText!=null&&!"".equals(keyText.trim())){if(keyText.trim().length()>=24){flag = true ;}}return flag ;}/** * 加密 * @param 明文 inputText * @return 密文 outputText */public String getEncString(String inputText) {Cipher cipher = null;String outputText = null ;try {cipher =Cipher.getInstance(CIPHER_ALGORITHM) ;cipher.init(Cipher.ENCRYPT_MODE, this.key) ;outputText= Base64.encode(cipher.doFinal(inputText.getBytes("UTF8")));} catch (Exception e) {e.printStackTrace();}finally{cipher= null;}return outputText;}/** * 解密 * @param 密文 inputText * @return 明文 outputText */public String getDesString(String inputText) {Cipher cipher = null;String outputText = null ;try {cipher =Cipher.getInstance(CIPHER_ALGORITHM) ;cipher.init(Cipher.DECRYPT_MODE, this.key) ;outputText= new String(cipher.doFinal(Base64.decode(inputText)));} catch (Exception e) {e.printStackTrace();}finally{cipher= null;}return outputText;}}