hibernate one-to-one实例

 

 首先新建两张表:person(id,name)和perauthor(id,alias)表,其中,person的ID为主键,perauthor的ID为既为主键也为外键

person文件:

package org.onetoone;

import java.util.HashSet;
import java.util.Set;
/** *//**
 * Person generated by MyEclipse - Hibernate Tools
 */

public class Person  implements java.io.Serializable ...{


    // Fields    

     private String id;
     private String name;
     private Perauthor perauthor;


    // Constructors

    /** *//** default constructor */
    public Person() ...{
    }

 /** *//** minimal constructor */
    public Person(String name) ...{
        this.name = name;
    }
    
    /** *//** full constructor */
   
    // Property accessors

    public String getId() ...{
        return this.id;
    }
    
    public void setId(String id) ...{
        this.id = id;
    }

    public String getName() ...{
        return this.name;
    }
    
    public void setName(String name) ...{
        this.name = name;
    }

 public Perauthor getPerauthor() ...{
  return perauthor;
 }

 public void setPerauthor(Perauthor perauthor) ...{
  this.perauthor = perauthor;
 }

}

Perauthor.java文件

package org.onetoone;

/** *//**
 * Perauthor generated by MyEclipse - Hibernate Tools
 */

public class Perauthor  implements java.io.Serializable ...{


    // Fields    

     private String id;
     private Person person;
     private String alias;


    // Constructors

    /** *//** default constructor */
    public Perauthor() ...{
    }

    
    /** *//** full constructor */
    public Perauthor(Person person, String alias) ...{
        this.person = person;
        this.alias = alias;
    }

   
    // Property accessors

    public String getId() ...{
        return this.id;
    }
    
    public void setId(String id) ...{
        this.id = id;
    }

    public Person getPerson() ...{
        return this.person;
    }
    
    public void setPerson(Person person) ...{
        this.person = person;
    }

    public String getAlias() ...{
        return this.alias;
    }
    
    public void setAlias(String alias) ...{
        this.alias = alias;
    }
   
}

person.hmb.xml文件:

 

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse - Hibernate Tools
-->
<hibernate-mapping>
    <class name="org.onetoone.Person" table="PERSON" schema="SYSTEM">
        <id name="id" type="java.lang.String">
            <column name="ID" length="10" />
            <generator class="assigned" />
        </id>
        <property name="name" type="java.lang.String">
            <column name="NAME" length="50" not-null="true" />
        </property>
       <one-to-one name="perauthor" class="org.onetoone.Perauthor" cascade="all"/>//cascade为级联
    </class>
</hibernate-mapping>

perauthor.hbm.xml文件

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse - Hibernate Tools
-->
<hibernate-mapping>
    <class name="org.onetoone.Perauthor" table="PERAUTHOR" schema="SYSTEM">
        <id name="id" type="java.lang.String">
            <column name="ID" length="10" />
            <generator class="foreign" >
            <param name="property">person</param>
            </generator>
        </id>
        <one-to-one name="person" class="org.onetoone.Person" cascade="all"/>
        <property name="alias" type="java.lang.String">
            <column name="ALIAS" length="50" not-null="true" />
        </property>
    </class>
</hibernate-mapping>