通過無參的構造方法來創建：

User.java

 1 package com.yikuan.vo;
 2 
 3 public class User {
 4     public User() {
 5         System.out.println("user的無參構造方法！");
 6     }
 7     private String name;
 8     public void setName(String name) {
 9         this.name = name;
10     }
11     public void show(){
12         System.out
 
.println("name："+name);
13     }
14 }

beans.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">
 

        <!-- bean就是java對象，由spring容器來創建和管理 -->
        <bean id="user" class="com.yikuan.vo.User">
            <property name="name" value="張三"></property>
        </bean>
</beans>

Test1.java

package com.yikuan.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;
 
import com.yikuan.vo.User;

public class Test1 {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml");
        User user = (User) ac.getBean("user");
        user.show();
    }
}

使用ioc創建對象的方式之一(通過無參的構造方法來創建：)