拦截Druid数据源自动注入帐密解密实现详解

Not registered via @EnableConfigurationProperties, 
marked as Spring component, 
or scanned via @ConfigurationPropertiesScan 

@Component
@ConfigurationProperties("spring.datasource.druid")
@ConditionalOnProperty(prefix = "spring.datasource",name = "encrypted", havingValue = "impossible")
public class MyEncryptedDatasourceWrapper extends DruidDataSource implements InitializingBean {
    @Autowired
    private DataSourceProperties basicProperties;
    public MyEncryptedDatasourceWrapper() {
    }
    @Override
    public void afterPropertiesSet() {
        if (super.getUsername() == null) {
            super.setUsername(this.basicProperties.determineUsername());
        }
        if (super.getPassword() == null) {
            super.setPassword(this.basicProperties.determinePassword());
        }
        if (super.getUrl() == null) {
            super.setUrl(this.basicProperties.determineUrl());
        }
        if (super.getDriverClassName() == null) {
            super.setDriverClassName(this.basicProperties.getDriverClassName());
        }
    }
    @Autowired(
            required = false
    )
    public void autoAddFilters(List<Filter> filters) {
        super.filters.addAll(filters);
    }
    @Override
    public void setMaxEvictableIdleTimeMillis(long maxEvictableIdleTimeMillis) {
        try {
            super.setMaxEvictableIdleTimeMillis(maxEvictableIdleTimeMillis);
        } catch (IllegalArgumentException var4) {
            super.maxEvictableIdleTimeMillis = maxEvictableIdleTimeMillis;
        }
    }
}

@Configuration
@EnableConfigurationProperties({DruidStatProperties.class, DataSourceProperties.class})
@Import({DruidSpringAopConfiguration.class, DruidStatViewServletConfiguration.class, DruidWebStatFilterConfiguration.class, DruidFilterConfiguration.class})
public class MyEncryptedDatasourceWrapperConfig {
    /**
     * 该属性封装了 spring.datasource 属性，需要对它的帐号、密码属性进行解密
     */
    @Autowired
    private DataSourceProperties basicProperties;
    /**
     * 使用数据源配置信息，解密帐号和密码后创建数据库连接池
     * @return
     */
    @Bean
    public DataSource dataSource() {
        // TODO 对密码解密并设置回去
        basicProperties.setPassword(password);
        return new MyEncryptedDatasourceWrapper();
    }
}

@Configuration
@EnableConfigurationProperties(DataSourceProperties.class)
public class MyAutoConfig {
    @Autowired
    private DataSourceProperties basicProperties;
    public MyAutoConfig() {
        System.out.println("My Auto config");
    }
    @Bean
    public DataSourceProperties basicProperties() {
        // TODO 解密配置
        System.out.println("username " + basicProperties.getUsername());
        return basicProperties;
    }
}