错误提示：
[javac] /opt/tep/QUI-6082/src/org/eredlab/g4/ccl/util/G4Utils.java:31: 错误: 程序包javax.crypto不存在
[javac] import javax.crypto.Cipher;
[javac] ^
[javac] /opt/tep/QUI-6082/src/org/eredlab/g4/ccl/util/G4Utils.java:32: 错误: 程序包javax.crypto不存在
[javac] import javax.crypto.SecretKey;
[javac] ^
[javac] /opt/tep/QUI-6082/src/org/eredlab/g4/ccl/util/G4Utils.java:33: 错误: 程序包javax.crypto不存在
[javac] import javax.crypto.SecretKeyFactory;
[javac] ^
[javac] /opt/tep/QUI-6082/src/org/eredlab/g4/ccl/util/G4Utils.java:34: 错误: 程序包javax.crypto.spec不存在
[javac] import javax.crypto.spec.DESKeySpec;
[javac] ^