扩展zip4j内存加密压缩包(二)
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
}
}
}
}
private void checkParameters(ZipParameters parameters) throws ZipException {
if (parameters == null) {
throw new ZipException("cannot validate zip parameters");
}
if ((parameters.getCompressionMethod() != Zip4jConstants.COMP_STORE) &&
parameters.getCompressionMethod() != Zip4jConstants.COMP_DEFLATE) {
throw new ZipException("unsupported compression type");
}
if (parameters.getCompressionMethod() == Zip4jConstants.COMP_DEFLATE) {
if (parameters.getCompressionLevel() < 0 && parameters.getCompressionLevel() >
9) {
throw new ZipException("invalid compression level. compression level dor deflate should be in the range of 0-9");
}
}
if (parameters.isEncryptFiles()) {
if (parameters.getEncryptionMethod() != Zip4jConstants.ENC_METHOD_STANDARD &&
parameters.getEncryptionMethod() != Zip4jConstants.ENC_METHOD_AES) {
throw new ZipException("unsupported encryption method");
}
if (parameters.getPassword() == null || parameters.getPassword().length <= 0) {
throw new ZipException("input password is empty or null");
}
} else {
parameters.setAesKeyStrength(-1);
parameters.setEncryptionMethod(-1);
}
}
}