作业一

作业一

标签（空格分隔）： 未分类

Student

package com.niit.quickstart.bean;

import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Configuration;

@Configurationpublic class Student {

@Value("张三")

private String name;

​

@Value("#{20-2}")

private String age;

​

public String getName() {

   return name;

}

​

public String getAge() {

   return age;

}

​

@Override

public String toString() {

   return "Student{" +

           "name='" + name + '\'' +

           ", age='" + age + '\'' +

           '}';

}

}

Teacherpackage com.niit.quickstart.bean;

import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Configuration;

@Configurationpublic class Teacher {

@Value("许老师")

private String name;

​

@Value("Spring Boot")

private String subject;

​

public String getName() {

   return name;

}

​

public String getSubject() {

   return subject;

}

​

@Override

public String toString() {

   return "Teacher{" +

           "name='" + name + '\'' +

           ", subject='" + subject + '\'' +

           '}';

}

}

Courserpackage com.niit.quickstart.bean;

import org.springframework.stereotype.Component;

import javax.annotation.Resource;

@Componentpublic class Course {    @Resource    private Student student;

@Resource Teacher teacher;

​

@Override

public String toString() {

   return "Course{" +

           "student=" + student +

           ", teacher=" + teacher +

           '}';

}

}

Applicationpackage com.niit.quickstart;

import com.niit.quickstart.bean.Course;import com.niit.quickstart.bean.Student;import com.niit.quickstart.bean.Teacher;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.ApplicationContext;

@SpringBootApplicationpublic class DemoApplication {

public static void main(String[] args) {

   ApplicationContext ac = SpringApplication.run(DemoApplication.class,args);

   System.out.println("使用Spring Boot开始注入Course的bean,它由Teacher和Student的bean装配而成:");

//        Student student = (Student) ac.getBean("student");//        Teacher teacher = (Teacher) ac.getBean("teacher");

   Course course = (Course) ac.getBean("course");

​

   System.out.println(course.toString());

}

}