引用传递及基本应用---一对一关系_引用传递中一对多关系-优快云博客

本文探讨了Java中使用ORM框架进行对象关系映射和数据持久化的实现方式，详细介绍了如何通过ORM框架简化数据库操作，提高开发效率。

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class Person{
	private int age;
	private String name;
	private Book book;
	public Person(String name, int age){
		this.setName(name);
		this.setAge(age);
	}
	public String getName(){
		return name;
	}
	public void setName(String name){
		this.name = name;
	}
	public int getAge(){
		return age;
	}
	public void setAge(int age){
		this.age = age;
	}
	public Book getBook(){
		return book;
	}
	public void setBook(Book book){
		this.book = book;
	}
}

class Book{
	private float price;
	private String title;
	private Person person;
	public Book(String title, float price){
		this.setTitle(title);
		this.setPrice(price);
	}
	public String getTitle(){
		return title;
	}
	public void setTitle(String title){
		this.title = title;
	}
	public float getPrice(){
		return price;
	}
	public void setPrice(float price){
		this.price = price;
	}
	public Person getPerson(){
		return person;
	}
	public void setPerson(Person person){
		this.person = person;
	}	
}

public class OneToOne{
	public static void main(String []args){
		Person p = new Person("Mary",18);
		Book b = new Book("别相信任何人",25.0f);
		p.setBook(b);
		b.setPerson(p);
		//方法后面必须跟"()"
		System.out.println("从人找书：\n"+"人名："+p.getName()+"\t年龄："+p.getAge()+"\n书名："+p.getBook().getTitle()+"\t书的价格："+p.getBook().getPrice());
		System.out.println("从书找人：\n"+"书名："+b.getTitle()+"\t书的价格："+b.getPrice()+"\n人名："+b.getPerson().getName()+"\t年龄："+b.getPerson().getAge());
	}
}

运行结果：