mybatis-plus的SafetyEncryptProcessor安全加密处理示例解析
作者:codecraft
序
本文主要研究一下mybatis-plus的SafetyEncryptProcessor
SafetyEncryptProcessor
mybatis-plus-boot-starter/src/main/java/com/baomidou/mybatisplus/autoconfigure/SafetyEncryptProcessor.java
public class SafetyEncryptProcessor implements EnvironmentPostProcessor { @Override public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) { /** * 命令行中获取密钥 */ String mpwKey = null; for (PropertySource<?> ps : environment.getPropertySources()) { if (ps instanceof SimpleCommandLinePropertySource) { SimpleCommandLinePropertySource source = (SimpleCommandLinePropertySource) ps; mpwKey = source.getProperty("mpw.key"); break; } } /** * 处理加密内容 */ if (StringUtils.isNotBlank(mpwKey)) { HashMap<String, Object> map = new HashMap<>(); for (PropertySource<?> ps : environment.getPropertySources()) { if (ps instanceof OriginTrackedMapPropertySource) { OriginTrackedMapPropertySource source = (OriginTrackedMapPropertySource) ps; for (String name : source.getPropertyNames()) { Object value = source.getProperty(name); if (value instanceof String) { String str = (String) value; if (str.startsWith("mpw:")) { map.put(name, AES.decrypt(str.substring(4), mpwKey)); } } } } } // 将解密的数据放入环境变量,并处于第一优先级上 if (CollectionUtils.isNotEmpty(map)) { environment.getPropertySources().addFirst(new MapPropertySource("custom-encrypt", map)); } } } }
SafetyEncryptProcessor实现了EnvironmentPostProcessor接口,在postProcessEnvironment方法中先是找到mpw.key,然后遍历所有PropertySource的所有属性,找到mpw:开头的,然后进行解密并替换到密文,最后放在environment的第一个PropertySource
spring.factories
mybatis-plus-boot-starter/src/main/resources/META-INF/spring.factories
# Auto Configure org.springframework.boot.env.EnvironmentPostProcessor=\ com.baomidou.mybatisplus.autoconfigure.SafetyEncryptProcessor
小结
之前的文章聊聊springboot的EnvironmentPostProcessor提到springboot提供了EnvironmentPostProcessor接口,该接口有postProcessEnvironment方法,其中envrionment参数类型为ConfigurableEnvironment,即应用可以通过实现这个接口进行env环境变量的操作。而mybatis-plus的SafetyEncryptProcessor正是一个实战的好例子。
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