Hello Spring 第一个Spring程序

package com.yyf.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 + ''' +
                '}';
    }
}

2.配置applicationContext.xml   创建bean  并为str属性赋值 Spring

3.测试类

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

public class MyTest {
    public static void main(String[] args) {
        //获取Spring的上下文对象
        ApplicationContext context = new ClassPathXmlApplicationContext ("beans.xml");
        //我们的对象都在spring中管理了，要使用直接去里面拿就好了
        Hello hello =(Hello) context.getBean ("hello");
        System.out.println (hello.toString ());
    }
}