一，通過屬性注入 1. 在beans.xml中，定義id為 people2 ，class屬性不變的bean，並給bean的屬性賦值。 xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd"

> <bean id="people" class="com.cruise.entity.People">bean> <bean id="people2" class="com.cruise.entity.People">     <property name="id" value="2">property>     <property name="name" value="張三">property>     <property name="age" value="22">property> bean> beans>2. 在people類中結尾新增 toString方法， @Override     public String toString() {        return "People [id=" + id + ", name=" + name + ", age=" + age + "]";     }3. 在Test2類中，新增程式碼獲取people2，執行-測試package com.cruise.test;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.cruise.entity.People;public class Test2 {     public static void main(String[] args) {        ClassPathXmlApplicationContext CA = new ClassPathXmlApplicationContext("beans.xml");        People people = (People)CA.getBean("people");        System.out.println(people);                People people2 = (People)CA.getBean("people2");        System.out.println(people2);     } }二，通過構造注入 1. 在people類結尾處新增全參建構函式和無參建構函式，public People(int id, String name, int age) {        super();        this.id = id;        this.name = name;        this.age = age;     }2. 在beans.xml中，在同樣的位置新增：定義id為people3，class屬性同上的bean，並通過構造的型別給屬性賦值。 <bean id="people3" class="com.cruise.entity.People">     <constructor-arg type="int" value="3">constructor-arg>     <constructor-arg type="String" value="李四">constructor-arg>     <constructor-arg type="int" value="33">constructor-arg> bean>3. 在Test2中，在同樣的位置新增程式碼獲取people3，執行-測試        People people3 = (People)CA.getBean("people3");        System.out.println(people3);

1. 在beans.xml中，定義id為people4，class屬性不變的bean，並通過構造的順序給屬性賦值。 <bean id="people4" class="com.cruise.entity.People">     <constructor-arg index="0" value="4">constructor-arg>     <constructor-arg index="1" value="王五">constructor-arg>     <constructor-arg index="2" value="44">constructor-arg> bean>2. 在Test2中，新增程式碼獲取people4，執行-測試        People people4 = (People)CA.getBean("people4");        System.out.println(people4);

1. 在beans.xml中，定義id為people5，class屬性不變的bean，並通過構造的順序和構造的型別聯合給屬性賦值。 <bean id="people5" class="com.cruise.entity.People">     <constructor-arg index="0" type="int" value="5">constructor-arg>     <constructor-arg index="1" type="String" value="趙六">constructor-arg>     <constructor-arg index="2" type="int" value="55">constructor-arg> bean>2. 在Test2中，新增程式碼獲取people5，執行-測試        People people5 = (People)CA.getBean("people5");        System.out.println(people5);三，通過工廠方法注入 1. 新建一個包：com.cruise.factory ，新建類：PeopleFactory,寫返回值型別為People的createPeople()方法：new People(),設定屬性，返回例項，package com.cruise.factory;import com.cruise.entity.People;public class PeopleFactory {     public People createPeople(){                People people = new People();        people.setId(6);        people.setName("小七");        people.setAge(66);        return people;     } }2. 在beans.xml中，定義id為peopleFactory ，class為com.cruise.factory.PeopleFactory的bean; 再定義一個工廠bean，指令id為people6，指定工廠名為peopleFactory(保持一致)，指定工廠裡的方法createPeople(保持一致) <bean id="peopleFactory" class="com.cruise.factory.PeopleFactory"></bean> <bean id="people6" factory-bean="peopleFactory" factory-method="createPeople"></bean>3. 在Test2類中新增程式碼，獲取people6，執行-測試，這是一個非靜態的工廠        People people6 = (People)CA.getBean("people6");         System.out.println(people6);

1. 新建類：PeopleFactory2,寫返回值型別為People的createPeople()靜態方法：new People(),設定屬性，返回例項，package com.cruise.factory;import com.cruise.entity.People;public class PeopleFactory2 {     public static People createPeople(){                People people = new People();        people.setId(7);        people.setName("老八");        people.setAge(77);        return people;     } }2. 在beans.xml中，定義id為peopleFactory ，class為com.cruise.factory.PeopleFactory的bean; 再定義一個工廠bean，指令id為people7，不需要指定工廠名為peopleFactory，直接指定工廠裡的方法createPeople(保持一致) <bean id="people7" class="com.cruise.factory.PeopleFactory2" factory-method="createPeople"></bean>3. 在Test2類中新增程式碼，獲取people7，執行-測試，這是一個靜態的工廠        People people7 = (People)CA.getBean("people7");         System.out.println(people7);