EncryptablePropertyPlaceholderConfigurer的工作原理

我在数据库中有一个加密的密码,在application.properties中有一个占位符 分贝

KPW=ENC(somebigencryptedpwd=)

应用程序.属性

KPW=${KPW}

豆: @豆子

public static PlaceholderManager getPropertyConfigurer() throws IOException{
    PlaceholderManager propUtils = new PlaceholderManager(); //this class extends PropertyPlaceholderConfigurer and override postProcessBeanFactory
    propUtils.setDataSourceName("DSXA");
    propUtils.setLocalOverride(true);
    return propUtils;
}

@Bean
public static EnvironmentStringPBEConfig environmentVariablesConfiguration() {
    EnvironmentStringPBEConfig environmentVariablesConfiguration = new EnvironmentStringPBEConfig();
    environmentVariablesConfiguration.setAlgorithm("PBEWithMD5AndDES");
    environmentVariablesConfiguration.setPasswordEnvName("APP_ENCRYPTION_PASSWORD");
    return environmentVariablesConfiguration;
}

@Bean
public static PBEStringEncryptor configurationEncryptor() {
    StandardPBEStringEncryptor encryptor = new StandardPBEStringEncryptor();
    encryptor.setConfig(environmentVariablesConfiguration());  
    return encryptor;
}

 @Bean
 public static PropertyPlaceholderConfigurer propertyConfigurer() {
     EncryptablePropertyPlaceholderConfigurer propertyConfigurer = new EncryptablePropertyPlaceholderConfigurer(configurationEncryptor());
     propertyConfigurer.setLocation(new ClassPathResource("application.properties"));
     // propertyConfigurer.setLocation(resource);
     return propertyConfigurer;
 }

用法:

<bean id="keSender" class="org.springframework.ws.transport.http.HttpComponentsMessageSender">
        <property name="credentials">
            <bean class="org.apache.http.auth.UsernamePasswordCredentials">
                <constructor-arg value="${KID}"/>
                <constructor-arg value="${KPW}"/>
            </bean>
        </property>
    </bean>

如果我使用@Value注入KPW并使用端点返回它,我将从DB获取该值。但是我如何在加密的占位符后打印密码,看它是否被解密并且是正确的