1.先导入spring中的核心jar包如图所示：
2，我们建立个配置文件，点击new创建一个file文件（是在src目录下创建），可以默认命名为application.Context.xml
然后我们可以看到，在这里，配置的xml文件变成了绿色的叶子，这里表示可执行文件，当然这个文件咱们可以随便取名，当xml有可执行的文件 时就会变为绿色，
3,我们先来个实体类 User:
package com.qingmang.test;
public class User {
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
创建好实体类之后，我们现在来xml中配置我们需要使用到的对象；
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xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xmlns:p="https://www.springframework.org/schema/p" xmlns:context="https://www.springframework.org/schema/context" xmlns:aop="https://www.springframework.org/schema/aop" xmlns:tx="https://www.springframework.org/schema/tx" xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd https://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd https://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd https://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd">
配置好之后我们来个AppDemo测试下;
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package com.qingmang.test;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class AppDemo {
public static void main(String[] args) {
//spring 操作时对象的创建交给spring去操作；
//如何去获取对象
Resource resource=new ClassPathResource("applicationContext.xml");
//创建工厂对象
BeanFactory bf=new XmlBeanFactory(resource);
User user= (User) bf.getBean("user");//你当前需要使用的id
System.out.println(user);
}
}
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显示如下：
2016-12-8 11:20:26 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [applicationContext.xml]
com.qing.test.User@44050988
这样我们就创建了了，我们要使用的对象，相当于new了一个对象
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配置文件中的一个节点，scope里默认是singleton，也就是单例模式
xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xmlns:p="https://www.springframework.org/schema/p" xmlns:context="https://www.springframework.org/schema/context" xmlns:aop="https://www.springframework.org/schema/aop" xmlns:tx="https://www.springframework.org/schema/tx" xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd https://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd https://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd https://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd">
我们更改了默认的属性，改为非单例模式：prototype
显示结果如下：
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2016-12-8 12:32:04 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@2c41d05d: startup date [Thu Dec 08 12:32:04 CST 2016]; root of context hierarchy 2016-12-8 12:32:04 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [applicationContext.xml] 2016-12-8 12:32:04 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@291946c2: defining beans [user]; root of factory hierarchy com.qing.test.User@290fd7f6 com.qing.test.User@4f2b6c89
