Java @Autowired注解自动注入bean
annotationWire.xml （一定记得配置context:annotation-config/）
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <context:annotation-config/> <bean id="order" class="com.annotationWire.pojo.Order" p:order="202020124546" /> <bean id="user" class="com.annotationWire.pojo.User" /></beans>
User类
package com.annotationWire.pojo;import lombok.Data;import org.springframework.beans.factory.annotation.Autowired;@Datapublic class User { private String name; @Autowired private Order order;}
Order类
package com.annotationWire.pojo;import lombok.Data;@Datapublic class Order { private String order;}
测试类
package com.annotationWire;import com.annotationWire.pojo.User;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class TestAnnotation { @Test public void test(){ ApplicationContext applicationContext = new ClassPathXmlApplicationContext("annotationWire.xml"); User student = applicationContext.getBean(User.class); System.out.println(student); }}
java配置spring，无法@Autowired自动注入bean的问题
要在配置类上加上@ComponentScan
同时在RootConfigure和ServletConfig两个类上scan的对象是不同的
ServletConfig是用来注册DispatcherServlet的，它只是用来扫描controller层的
RootConfigure用来注册ContextLoaderListener，他扫描的范围是除了controller以外的bean，例如dao，service，bean实体。
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
夫妇一条心，泥土变黄金。
