Spring 通过2种方式管理bean
首先要导入Spring的包，（Spring.jar和commonslogging.jar） 或加载分开的...
在src目录下建立applicationContext.xml (Spring 管理 bean的配置文件)
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPEING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans> <bean id="user" class="com.cc8w.entiey.User"/> </beans>
1.使用BeanFactory管理bean
2.使用ApplicationContext管理bean
package com.cc8w; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.core.io.ClassPathResource; import org.springframework.core.io.Resource; import com.cc8w.entiey.User; public class TestBean { public static void main(String[] args) { //BeanFactory 管理bean Resource resource = new ClassPathResource("applicationContext.xml"); BeanFactory factory =new XmlBeanFactory(resource); User user = (User) factory.getBean("user"); System.out.println(user); //applicationContext 管理bean ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); User user1 = (User)context.getBean("user"); System.out.println(user1); } }
java的数据类型
package com.cc8w.entiey; public class User { private String name; private int age; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }
结果：
呃.. 写错了，应该时entity.
Spring 控制反转 依赖注入 （配置初始化参数-实例化参数）
1.接口注入
2.Setter注入（推荐）
3.构造器注入
原文：http://www.cnblogs.com/fps2tao/p/7225091.html