import org.springframework.security.crypto.keygen.StringKeyGenerator; //导入依赖的package包/类
public static StringKeyGenerator withBitLength(int length) {
    return new Base64StringKeyGenerator(KeyGenerators.secureRandom(length));
}
 

import org.springframework.security.crypto.keygen.StringKeyGenerator; //导入依赖的package包/类
/**
 * Generates password with 16 characters length with Spring standard key generator.
 *
 * @return  password with 16 characters
 */
public static String generatePassword() {

    StringKeyGenerator generator = KeyGenerators.string();

    return generator.generateKey();
}
 

import org.springframework.security.crypto.keygen.StringKeyGenerator; //导入依赖的package包/类
/**
 * Creates a {@link StringKeyGenerator} that hex-encodes {@link SecureRandom} keys of 8 bytes in length. The
 * hex-encoded string is keyLength * 2 characters in length.
 */
public static StringKeyGenerator string() {
	return new HexEncodingStringKeyGenerator(secureRandom());
}