spring配置详解-三种对象创建方式_

package com.learn.bean;/*** @author Leon.Sun*/
public class User {public User() {System.out.println("User空参构造方法");}private String name;private Integer age;public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}}

package com.learn.a_hello;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.learn.bean.User;public class Demo {@Testpublic void fun1() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user");/*** 打印user对象*/System.out.println(u);}}

package com.learn.b_create;import com.learn.bean.User;public class UserFactory {public static User createUser() {System.out.println("静态工厂创建User");return new User();}
}

package com.learn.a_hello;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.learn.bean.User;public class Demo {/*** 创建方式1:空参构造*/@Testpublic void fun1() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user");/*** 打印user对象*/System.out.println(u);}/*** 创建方式2:静态工厂*/@Testpublic void fun2() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user2");/*** 打印user对象*/System.out.println(u);}	}

package com.learn.b_create;import com.learn.bean.User;public class UserFactory {public static User createUser() {System.out.println("静态工厂创建User");return new User();}public User createUser2() {System.out.println("实例工厂创建User");return new User();}
}

package com.learn.a_hello;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.learn.bean.User;public class Demo {/*** 创建方式1:空参构造*/@Testpublic void fun1() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user");/*** 打印user对象*/System.out.println(u);}/*** 创建方式2:静态工厂*/@Testpublic void fun2() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user2");/*** 打印user对象*/System.out.println(u);}/*** 创建方式2:动态工厂*/@Testpublic void fun3() {/*** 1.创建容器*/ApplicationContext ac = new ClassPathXmlApplicationContext("com/learn/b_create/applicationContext.xml");/*** 2.向容器要"user"对象*/User u = (User)ac.getBean("user3");/*** 打印user对象*/System.out.println(u);}}

这是实例工厂,这就是第三种创建方式,后面两种看看,以后基本上不用

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