6_Spring_Bean的自动装配
bean自动装配
通过property标签可以手动指定给属性进行注入
我们也可以通过自动转配,完成属性的自动注入,就是自动装配,可以简化DI的配置
准备实体类
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package com.msb.bean;
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/**
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- @Author: Ma HaiYang
-
- @Description: MircoMessage:Mark_7001
-
*/
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public class Dept {
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}
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package com.msb.bean;
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/**
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- @Author: Ma HaiYang
-
- @Description: MircoMessage:Mark_7001
-
*/
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public class Emp {
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private Dept dept;
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@Override
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public String toString() {
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return "Emp{" +
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"dept=" + dept +
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'}';
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}
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public Dept getDept() {
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return dept;
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}
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public void setDept(Dept dept) {
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this.dept = dept;
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}
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public Emp() {
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}
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public Emp(Dept dept) {
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this.dept = dept;
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}
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}
配置文件
- <beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:p="http://www.springframework.org/schema/p"
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xmlns:c="http://www.springframework.org/schema/c"
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xsi:schemaLocation="http://www.springframework.org/schema/beans
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http://www.springframework.org/schema/beans/spring-beans.xsd">
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<bean id="dept" class="com.msb.bean.Dept"></bean>
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<!--
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autowire 属性控制自动将容器中的对象注入到当前对象的属性上
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byName 根据目标id值和属性值注入,要保证当前对象的属性值和目标对象的id值一致
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byType 根据类型注入,要保证相同类型的目标对象在容器中只有一个实例
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-->
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<bean id="emp" class="com.msb.bean.Emp" autowire="byName"></bean>
测试代码
- package com.msb.test;
- import com.msb.bean.Emp;
- import com.msb.bean.User;
- import org.junit.Test;
- import org.springframework.context.support.ClassPathXmlApplicationContext;
- /**
-
- @Author: Ma HaiYang
-
- @Description: MircoMessage:Mark_7001
- */
- public class Test2 {
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@Test
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public void testGetBean(){
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ClassPathXmlApplicationContext("applicationContext2.xml");ClassPathXmlApplicationContext context =new
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Emp emp = context.getBean("emp", Emp.class);
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System.out.println(emp);
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}
- }
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标签:装配,www,Spring,springframework,dept,Bean,Emp,org,public From: https://www.cnblogs.com/01way/p/17591273.html