1 @ConfigurationProperties说明
在编写项目代码时，我们要求更灵活的配置，更好的模块化整合。在 Spring Boot 项目中，为满足以上要求，我们将大量的参数配置在 application.properties 或 application.yml 文件中，通过 @ConfigurationProperties 注解，我们可以方便的获取这些参数值
2 使用@ConfigurationProperties
ConfigurationPropertiesTest.java
/** * @desc: @ConfigurationProperties * @author: YanMingXin * @create: 2021/7/27-17:36 **/ @ConfigurationProperties(prefix = "student") @Component public class ConfigurationPropertiesTest { private String name; private String age; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } } 复制代码
SpringUtil.java
/** * @desc: SpringUtil * @author: YanMingXin * @create: 2021/7/27-17:55 **/ @Component public class SpringUtil implements ApplicationContextAware { private static ApplicationContext applicationContext; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if (SpringUtil.applicationContext == null) { SpringUtil.applicationContext = applicationContext; } } /** * 获取applicationContext * * @return */ public static ApplicationContext getApplicationContext() { return applicationContext; } /** * 通过name获取 Bean * * @param name * @return */ public static Object getBean(String name) { return getApplicationContext().getBean(name); } /** * 通过class获取Bean * * @param clazz * @param <T> * @return */ public static <T> T getBean(Class<T> clazz) { return getApplicationContext().getBean(clazz); } /** * 通过name,以及Clazz返回指定的Bean * * @param name * @param clazz * @param <T> * @return */ public static <T> T getBean(String name, Class<T> clazz) { return getApplicationContext().getBean(name, clazz); } } 复制代码
application.properties
student.name=zs student.age=23 复制代码
测试：
@Test void contextLoads() { ConfigurationPropertiesTest bean = (ConfigurationPropertiesTest) SpringUtil.getBean("configurationPropertiesTest"); System.out.println(bean.getAge()); } 复制代码
输出：
23
