hibernate组件映射

package com.oracle.hibernate;

/**
 * wife是husband的一部分
 * wife示husband属性表的一部分，
 *所以wife没有id
 */

public class Wife {

    /**
     * 注意wife类里的属性名不能和husband类里的属性名冲突
     * 如果属性名一样，可以在getName()上加@Column指定映射的表里的字段名
     */
    
    private String wifeName;
    private int wifeage;

    public String getWifeName() {
        return wifeName;
    }
    public void setWifeName(String wifeName) {
        this.wifeName = wifeName;
    }
    public int getWifeage() {
        return wifeage;
    }
    public void setWifeage(int wifeage) {
        this.wifeage = wifeage;
    }
    
    
}

package com.oracle.hibernate;

import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import javax.persistence.OneToOne;

@Entity
public class Husband {

    private int id;
    private String name;
    private Wife  wife;
    
    @Id    //主键id
    @GeneratedValue    //自动生成
    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;
    }
    /**
     * Wife是husband的一部分，wife是husband表的一部分
     * 比如学生证信息，完全可以写在学生表里，作为属性的一部分，
     * 能写在一张表里就不必单独再弄一张表
     * 
     * 用@Embedded，嵌入的
     */
    @Embedded
    public Wife getWife() {
        return wife;
    }
    public void setWife(Wife wife) {
        this.wife = wife;
    }
}