Spring5入门之Hellospring

1.编写Hello类

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 + '\'' +
                '}';
    }
}

2.编写bean.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">
    <!--Hello hello =new Hello();-->
    <bean id="hello" class="com.zhu.pojo.Hello">
        <!-- 在这里写 bean 的配置和相关引用 -->
        <property name="str" value="hello,spring"></property>
    </bean>
</beans>

Hello hello =new Hello();
      id         class

name:变量名
value：赋值具体值

3.测试

public class Mytest {
    public static void main(String[] args) {
       ApplicationContext context = new ClassPathXmlApplicationContext("bean.xml");//读取xml文件
        Hello hello = (Hello) context.getBean("hello");//对应xml中的id,也就是new出来的对象名。
        System.out.println(hello.toString());//对象名调用方法
    }
}