spring-ioc的基本配置(BeanPostProcessor)

最新推荐文章于 2023-07-11 10:56:09 发布

最新推荐文章于 2023-07-11 10:56:09 发布 · 82 阅读

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#java

本文展示了一个实现 Spring BeanPostProcessor 接口的示例类 OtherFactory，该类用于演示如何在 Bean 初始化前后进行处理。文章包括了如何通过反射设置 Bean 的属性值，并展示了如何在 Bean 初始化的不同阶段进行操作。

import java.lang.reflect.AccessibleObject; import java.lang.reflect.Field; import org.springframework.beans.BeansException; import org.springframework.beans.factory.config.BeanPostProcessor; import org.springframework.context.ApplicationEvent; public class OtherFactory implements BeanPostProcessor { public static IOther getOther() { return new Other(); } private String string; public IOther getIOther() { IOther other = new Other(); other.setString(string); return other; } public String getString() { return string; } @Override public Object postProcessAfterInitialization(Object object, String string) throws BeansException { Field[] fields = object.getClass().getDeclaredFields(); AccessibleObject.setAccessible(fields, true); for (Field field : fields) { if (String.class.equals(field.getType())) { try { field.set(object, field.get(object)); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } } } return object; } @Override public Object postProcessBeforeInitialization(Object object, String string) throws BeansException { return postProcessAfterInitialization(object, string); } public void setString(String string) { this.string = string; System.out.println(string); } }