Spring_day02_2(注入的方式)

在Spring中属性的注入分为两种

构造函数的注入：
  1.无参构造函数
  2.有参构造函数
Set方式的注入：
  创建set方法。

构造方法属性注入：
public class Student {
	private int number;
	private String name;
	// 无参构造函数
	public Student(){
	}
	// 有参构造函数
	public Student(int number,String name){
		this.name = name;
		this.number = number;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return "Student [number=" + number + ", name=" + name + "]";
	}
	
}

1.无参函数的
	@Test
	public void demo4(){
		ApplicationContext ac = new ClassPathXmlApplicationContext("application_context.xml");
		Student student = ac.getBean("student",Student.class);
		System.out.println(student);
    }

	

2.有参构造函数
	
    	
    	
    

	
	Student student = ac.getBean("student1",Student.class);
        System.out.println(student);

Set方法属性注入：

    
    	
    	
    
	
	Student student = ac.getBean("student2",Student.class);
     System.out.println(student);