SpringIOC创建对象的两种方式

public class User {
  private String name;

  public User() {
    System.out.println("执行了User类的无参构造方法~");
  }

  public User(String name){
    this.name = name;
    System.out.println("执行了User类的有参构造方法");
  }

  //使用无参构造方法时，必须要设置set方法，因为注入时 需要通过set方法注入
  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String toString() {
    return "User{" +
        "name='" + name + '\'' +
        '}';
  }
}

<&＃63;xml version="1.0" encoding="UTF-8"&＃63;>


  
    
  

public class MyTest {
  public static void main(String[] args) {
    ApplicationContext cOntext= new ClassPathXmlApplicationContext("applicationContext.xml");
    User user = context.getBean("user", User.class);
    System.out.println(user);
  }
}