spring-02-hellospring

 

目錄結構：

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring-study</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-02-hellospring</artifactId>


</project>

Hello

package com.kuang.pojo;

public class Hello {
    private String str;

    public String getStr() {
        return str;
    }

    public void setStr(String str) {
        this.str = str;
    }

    @Override
    public String toString() {
        return "Hello{" +
                "str='" + str + '\'' +
                '}';
    }

}

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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--使用Spring來創建對象，在Spring中這些都稱爲bean-->
    <bean id="hello" class="com.kuang.pojo.Hello">
        <property name="str" value="Spring"/>
    </bean>

</beans>

MyTest

import com.kuang.pojo.Hello;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    public static void main(String[] args) {
        //獲取Spring的上下文對象
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        //我們的對象現在都在Spring中管理了，我們要使用，直接取出來即可！
        Hello hello = (Hello) context.getBean("hello");
        System.out.println(hello.toString());
    }
}