1、建立Java專案：File -> New -> Java Project

2、引入必要jar包，專案結構如下

3、建立People實體類People.java

package com.spring.model;

public class People {

    private int id;
    private String name;

    public People() {
        super();
        System.out.println("Create People");
    }

    public int getId
 
() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "People [id=" + id + ", name="
 
 + name + "]";
    }

}

4、建立spring配置檔案applicationContext.xml

<?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"
 
>

    <!--非單例模式，未呼叫前不例項化物件-->
    <bean id="prototypePeople" class="com.spring.model.People" scope="prototype">
        <property name="id" value="0"></property>
        <property name="name" value="prototypePeople"></property>
    </bean>

    <!--單例模式，載入applicationContext.xml時初始化物件-->
    <bean id="singletonPeople" class="com.spring.model.People" scope="singleton">
        <property name="id" value="0"></property>
        <property name="name" value="singletonPeople"></property>
    </bean>

</beans>

5、建立Spring測試類SpringUnit.java

package com.spring.junit;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringUnit {

    ClassPathXmlApplicationContext ctx = null;

    @Before
    public void setUp() throws Exception {
        ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
    }

    @Test
    public void test() {

        System.out.println(ctx.getBean("prototypePeople") == ctx.getBean("prototypePeople"));
        System.out.println(ctx.getBean("singletonPeople") == ctx.getBean("singletonPeople"));
    }

    @After
    public void tearDown() throws Exception {
        ctx.close();
    }

}

6、測試結果

... 省略Spring日誌資訊 ...

Create People
Create People
Create People
false
true

... 省略Spring日誌資訊 ...