spring之Holle World项目

1、在IDEA中新建一个java项目，在里面新建lib包和在src下新建com包和cxt包（包名随便）。

2、spring官网上下载最新的spring框架，复制进lib中

3、添加必需的库

4、编写Bean文件，xml文件，main文件

Bean文件：

package com.bean;

public class TestDemo {
    private String name;
    private String msg;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getMsg() {
        System.out.println("测试执行："+msg);
        return msg;
    }
    public void setMsg(String msg) {
        this.msg = msg;
    }
}

xml文件：

<?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 id="testDemo" class="com.bean.TestDemo"></bean>
</beans>

main文件：通过ApplicationContext接口的方式

package com.cxt;

import com.bean.TestDemo;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class Spring_demo1 {
    public static void main(String[] args) {
        // 通过xml名字加载bean
        ApplicationContext context = new ClassPathXmlApplicationContext("bean1.xml");
        TestDemo testDemo = context.getBean("testDemo", TestDemo.class);
        testDemo.setMsg("这是一个测试的demo");
        testDemo.getMsg();

        // 通过路径加载Bean,地址是绝对地址
        FileSystemXmlApplicationContext con = new FileSystemXmlApplicationContext("D:/workspace/Spring_demo1/src/bean1.xml");
        TestDemo testDemo1 = con.getBean("testDemo", TestDemo.class);
        testDemo1.setMsg("通过地址");
        testDemo1.getMsg();
    }
}

5、程序运行结果