VIP31/spring-demo/src/test/java/com/sf/ioc/TestUser.java

package com.sf.ioc;

import com.sf.ioc.helloworld.Role;
import com.sf.ioc.helloworld.User;
import org.junit.jupiter.api.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * src/main/java/com/sf
 * src/test/java/com/sf
 * 编写一个对user的测试类
 */
public class TestUser {

    @Test
    public void test() {
        // 先引入spring容器  然后查找user的bean
        // ApplicationContext 是应用上下文  容器的意思
        ApplicationContext context = new ClassPathXmlApplicationContext("ioc/spring-beans.xml");
        User user = (User) context.getBean("user");
        System.out.println(user);

        User user1 = (User) context.getBean("user1");
        System.out.println(user1);

        User user2 = (User) context.getBean("user2");
        System.out.println(user2);

        User user3 = (User) context.getBean("user3");
        System.out.println(user3);

        User user4 = (User) context.getBean("user4");
        System.out.println(user4);

        Role role = (Role) context.getBean("role");
        System.out.println(role);
    }


    @Test
    public void testNew() {
        ApplicationContext context = new ClassPathXmlApplicationContext("ioc/spring-beans-new.xml");
        User user = (User) context.getBean("user");
        System.out.println(user);

        User user1 = (User) context.getBean("user1");
        System.out.println(user1);

        User user2 = (User) context.getBean("user2");
        System.out.println(user2);

        // role只被创建一次 比较不同user的role对象  是同一个
        System.out.println(user.getRole() == user1.getRole());

        Role role = (Role) context.getBean("role1");
        System.out.println(role);

        Role role2 = (Role) context.getBean("role2");
        System.out.println(role2);

        Role role4 = (Role) context.getBean("role4");
        System.out.println(role4);
    }

    @Test
    public void test1(){
//        User user = new User("wangwu","sth");
//        Role role = new Role("admin");
//        user.setRole(role);


//        Role role = new Role("admin");
//        User user = new User("wangwu","sth",role);
        // 在配置文件中生效
        // 声明一个对象 对应一个bean标签

        //  <bean class="com.sf.helloworld.Role">
        //     <constructor-arg name="name" value="admin"/>
        //  </bean>

        // 包裹为构造器的参数
        // <constructor-arg name="name" value="wangwu"></constructor-arg>
        // <constructor-arg name="role">
        //    <bean class="com.sf.helloworld.Role">
        //         <constructor-arg name="name" value="admin"/>
        //    </bean>
        //  </constructor-arg>

        // 变成调用全参构造器
        //   <bean id="user1" class="com.sf.helloworld.User">
        //        <constructor-arg name="name" value="wangwu"></constructor-arg>
        //        <constructor-arg name="desc" value="普通用户"></constructor-arg>
        //        <constructor-arg name="role">
        //            <bean class="com.sf.helloworld.Role">
        //                <constructor-arg name="name" value="admin"/>
        //            </bean>
        //        </constructor-arg>
        //    </bean>


    }
}