hibernate--一对一联合主键外键关联

刺骨的言语ヽ痛彻心扉 2024-02-18 14:48 7阅读 0赞

annotation注解开发：

以person 和 personID为例：

Person.java:

package com.bean;
    
    import javax.persistence.Entity;
    import javax.persistence.Id;
    import javax.persistence.IdClass;
    import javax.persistence.OneToOne;
    
    @Entity
    @IdClass(value=PersonPK.class)
    public class Person {
    	private int id;
    	private String name;
    	private int age;
    
    	public int getAge() {
    		return age;
    	}
    
    	public void setAge(int age) {
    		this.age = age;
    	}
    
    	@Id
    	public int getId() {
    		return id;
    	}
    
    	public void setId(int id) {
    		this.id = id;
    	}
    
    	@Id
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    }

PersonPK.java:（联合主键类）

package com.bean;
    
    import java.io.Serializable;
    
    public class PersonPK implements Serializable{
    	private int id;
    	private String name;
    
    	public int getId() {
    		return id;
    	}
    
    	public void setId(int id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@Override
    	public int hashCode() {
    		return this.name.hashCode();
    	}
    
    	@Override
    	public boolean equals(Object obj) {
            if(obj instanceof PersonPK){
            	PersonPK personPK = (PersonPK)obj;
            	if(this.id == personPK.id && this.name.equals(personPK.name)){
            		return true;
            	}
            }
    		return false;
    	}
    
    }

PersonID.java:

package com.bean;
    
    import javax.persistence.Entity;
    import javax.persistence.Id;
    import javax.persistence.JoinColumn;
    import javax.persistence.JoinColumns;
    import javax.persistence.OneToOne;
    
    @Entity
    public class PersonID {
    	private int id;
    	private String name;
    	Person person;
    
    	@Id
    	public int getId() {
    		return id;
    	}
    
    	public void setId(int id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@OneToOne
    	@JoinColumns(  //自定义数据库中字段名称
    			{
    				@JoinColumn(name="WifeId",referencedColumnName="id"),
    				@JoinColumn(name="wifeName",referencedColumnName="name")
    			}
    			)
    	public Person getPerson() {
    		return person;
    	}
    
    	public void setPerson(Person person) {
    		this.person = person;
    	}
    
    }