Spring Boot 在启动时进行配置文件加解密，springboot如何加载配置文件

ゝ一纸荒年。 2022-09-02 13:46 123阅读 0赞

### 网上好多都是copy的，而且有些类已经过时，我自己完善了些，有问题，请留言 ###

一共需要两步  
**1 写一个配置类**

package com.xxl.job.admin.afterconfig;
    
    import com.xxl.job.admin.util.EncryptAesUtil;
    import org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor;
    import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
    import org.springframework.boot.context.event.ApplicationPreparedEvent;
    import org.springframework.context.ApplicationEvent;
    import org.springframework.context.event.SmartApplicationListener;
    import org.springframework.core.Ordered;
    import org.springframework.core.env.ConfigurableEnvironment;
    
    /** * 解密配置文件的信息 * * @author liHu * @version 1.0 * @date 2021/8/3 17:05 * @since JDK 1.8 */
    public class AfterConfigListener implements SmartApplicationListener, Ordered { 
    
        /** * 复制的ConfigFileApplicationListener文件内容 * @param eventType * @return */
        @Override
        public boolean supportsEventType(Class<? extends ApplicationEvent> eventType) { 
            return ApplicationEnvironmentPreparedEvent.class.isAssignableFrom(eventType) || ApplicationPreparedEvent.class.isAssignableFrom(eventType);
        }
    
        @Override
        public void onApplicationEvent(ApplicationEvent event) { 
            // ApplicationEnvironmentPreparedEvent 是加载配置文件，初始化日志系统的事件。
            if (event instanceof ApplicationEnvironmentPreparedEvent) { 
                // 获得原来的password内容
                ConfigurableEnvironment environment = ((ApplicationEnvironmentPreparedEvent) event).getEnvironment();
                String url = environment.getProperty("spring.datasource.url");
                String username = environment.getProperty("spring.datasource.username");
                String password = environment.getProperty("spring.datasource.password");
                // 进行密码的解密
                System.setProperty("spring.datasource.url", EncryptAesUtil.aesDecrypt(url));
                System.setProperty("spring.datasource.username", EncryptAesUtil.aesDecrypt(username));
                System.setProperty("spring.datasource.password", EncryptAesUtil.aesDecrypt(password));
            }
            if (event instanceof ApplicationPreparedEvent) { 
            }
        }
    
        @Override
        public int getOrder() { 
            // 设置该监听器 在加载配置文件之后执行
            return ConfigDataEnvironmentPostProcessor.ORDER + 1;
        }
    }

**2 启动项读取这个配置类**

package com.xxl.job.admin;
    
    import com.xxl.job.admin.afterconfig.AfterConfigListener;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /** * @author xuxueli 2018-10-28 00:38:13 */
    @SpringBootApplication
    public class XxlJobAdminApplication { 
    
    	public static void main(String[] args) { 
    // SpringApplication.run(XxlJobAdminApplication.class, args); // 这个是之前的启动代码
    		// 加上下面三行，
    		SpringApplication springApplication = new SpringApplication(XxlJobAdminApplication.class);
    		// 加载自定义的、重写后的、获取配置文件信息的类
    		springApplication.addListeners(new AfterConfigListener());
    		springApplication.run(args);
    	}
    
    }

EncryptAesUtil类请看这篇文章  
加解密工具  
https://blog.csdn.net/lh155136/article/details/119348435