spring 管理bean

Posted 2021-01-29 那天ws

目录结构：

Person.java

 1 package com.wss.entity;
 2 
 3 import com.wss.service.doHomeWork;
 4 
 5 public class Person {
 6 
 7     private String name;
 8     private int age;
 9     private doHomeWork dohomework;
10     
11     public void setDoHomeWork(doHomeWork dohomework) {
12         this.dohomework = dohomework;
13     }
14     public doHomeWork getDoHomeWork() {
15         return this.dohomework;
16     }
17     public String getName() {
18         return name;
19     }
20     public void setName(String name) {
21         this.name = name;
22     }
23     public int getAge() {
24         return age;
25     }
26     public void setAge(int age) {
27         this.age = age;
28     }
29     @Override
30     public String toString() {
31         return "Person [name=" + name + ", age=" + age + ", dohomework=" + dohomework + "]";
32     }
33 }

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doHomeWork.java

1 package com.wss.service;
2 
3 public class doHomeWork {
4     
5     public String write() {
6         return new String("write");
7     }
8 }

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PersonTest.java

 1 package com.wss.test;
 2 
 3 import org.junit.Test;
 4 import org.springframework.context.ApplicationContext;
 5 import org.springframework.context.support.ClassPathXmlApplicationContext;
 6 
 7 import com.wss.entity.Person;
 8 
 9 public class PersonTest {
10 
11     @Test
12     public void test1() {
13         ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
14         Person person = context.getBean("person", Person.class);
15         System.out.println(person.toString());
16         System.out.println(person.getDoHomeWork().write());
17     }
18 }

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spring-config.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" 
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 4        xsi:schemaLocation="http://www.springframework.org/schema/beans  
 5                            http://www.springframework.org/schema/beans/spring-beans.xsd">
 6     <!-- 配置person实例，其实现类是Person -->
 7     <bean id="person" class="com.wss.entity.Person">
 8         <property name="name" value="wss"></property>
 9         <property name="age" value="24"></property>
10         <!-- 驱动调用person的setDoHomeWork()方法，将容器中的stoneAxe作为参数传入 -->
11         <property name="doHomeWork" ref="dohomework"></property>
12     </bean>
13     <!-- 配置dohomework实例，其实现类是doHomeWork -->
14     <bean id="dohomework" class="com.wss.service.doHomeWork"></bean>
15 </beans>

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运行结果：

 两种注入方式：