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magic-tools 是一个小而全的Java工具类库，通过静态方法封装，降低相关API的学习成本，提高工作效率，使Java拥有函数式语言般的优雅，让Java语言也可以“甜甜的”。

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package com.magictools.crypto;

import java.security.Provider;

/**
 * 全局单例的 org.bouncycastle.jce.provider.BouncyCastleProvider 对象
 *
 * @author looly
 */
public enum GlobalBouncyCastleProvider {
	INSTANCE;

	private Provider provider;
	private static boolean useBouncyCastle = true;

	GlobalBouncyCastleProvider() {
		try {
			this.provider = ProviderFactory.createBouncyCastleProvider();
		} catch (NoClassDefFoundError e) {
			// ignore
		}
	}

	/**
	 * 获取{@link Provider}
	 *
	 * @return {@link Provider}
	 */
	public Provider getProvider() {
		return useBouncyCastle ? this.provider : null;
	}

	/**
	 * 设置是否使用Bouncy Castle库

	 * 如果设置为false，表示强制关闭Bouncy Castle而使用JDK
	 *
	 * @param isUseBouncyCastle 是否使用BouncyCastle库
	 * @since 4.5.2
	 */
	public static void setUseBouncyCastle(boolean isUseBouncyCastle) {
		useBouncyCastle = isUseBouncyCastle;
	}
}