tomcat敏感数据加密实现方案

在Tomcat中实现敏感数据的加密，可以通过自定义LifecycleListener来在Tomcat启动时进行解密操作。以下是一个简化的实现方案：

1. 使用Java的KeyStore管理密钥。
2. 使用Cipher进行加密和解密。
3. 自定义LifecycleListener来在Tomcat启动时解密敏感配置。

以下是一个简化的ServerLifecycleListener实现示例：

import org.apache.catalina.core.StandardServer;
import org.apache.catalina.startup.Catalina;
import org.apache.catalina.startup.LifecycleListener;
 
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.KeyStore;
 
public class SensitiveDataServerLifecycleListener implements LifecycleListener {
 
    private static final String KEYSTORE_PATH = "/path/to/keystore";
    private static final String KEY_ALIAS = "encryptionKey";
    private static final String CIPHER_ALGORITHM = "AES";
    private static final String TRANSFORMATION = "AES/ECB/PKCS5Padding";
 
    private KeyStore keystore;
    private Cipher cipher;
 
    public SensitiveDataServerLifecycleListener() throws Exception {
        keystore = KeyStore.getInstance(KeyStore.getDefaultType());
        keystore.load(new FileInputStream(KEYSTORE_PATH), null);
        cipher = Cipher.getInstance(TRANSFORMATION);
        SecretKeySpec keySpec = new SecretKeySpec(keystore.getKey(KEY_ALIAS, null).getEncoded(), CIPHER_ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, keySpec);
    }
 
    @Override
    public void lifecycleEvent(String event) {
        if (event.equals(Lifecycle.CONFIGURE_START_EVENT)) {
            try {
                // 假设有一个加密的敏感数据文件
                File encryptedFile = new File("/path/to/encryptedData.ser");
                ObjectInputStream ois = new ObjectInputStream(new F