加密工具类导致内存溢出

    /**
     * 私钥解密
     * @desc
     * @param data
     * @param privateKey
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPrivateKey(byte[] data,
                                             RSAPrivateKey privateKey) throws Exception {
        //每次都是new一个对象
        Cipher cipher = Cipher.getInstance(TRANSFORMATION,new BouncyCastleProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        return cipher.doFinal(data);
    }

 new BouncyCastleProvider() 是静态方法中的， new一个多一个，GC不回收， 慢慢就宕机。

改成单例模式

import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class SingletonBouncyCastleProvider {
	
	
	public SingletonBouncyCastleProvider() {}
	
	private static BouncyCastleProvider singleton=null;
	
	public static BouncyCastleProvider getInstance() {
		if(singleton==null) {
			synchronized(SingletonBouncyCastleProvider.class){
				if(singleton==null) {
					return new BouncyCastleProvider();
				}
			}
		}
		return singleton;
	}

}

Cipher cipher = Cipher.getInstance(TRANSFORMATION,SingletonBouncyCastleProvider.getInstance());