休眠与持久性列的Java问题

Question

我不断收到此错误，并找不到如何解决它。 无法确定类型：org.digitalcorpse.pirates.Pirate，对于列：[org.hibernate.mapping.Column（海盗）]

package org.digitalcorpse.pirates; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.OneToOne; 

@Entity 
public class Pirate { 
    @Id 
    @GeneratedValue 
    private String login; 
    private String password; 
    private String name; 
    private int skillSailing; 
    private int skillCannons; 
    private int skillMaps; 
    private int skillLeadership; 
    private int skillFixing; 
    private float gold; 
    private int karma; 
    @OneToOne 
    private Parrot parrot; 
    @OneToOne 
    private Fleet fleet; 

    public Pirate() { 
    } 

    public Pirate(String login, String password) { 
     this.login = login; 
     this.password = password; 
    } 

    public Fleet getFleet() { 
     return fleet; 
    } 

    public void setFleet(Fleet fleet) { 
     this.fleet = fleet; 
    } 

    public float getGold() { 
     return gold; 
    } 

    public void setGold(float gold) { 
     this.gold = gold; 
    } 

    public int getKarma() { 
     return karma; 
    } 

    public void setKarma(int karma) { 
     this.karma = karma; 
    } 

    public String getLogin() { 
     return login; 
    } 

    public void setLogin(String login) { 
     this.login = login; 
    } 

    public String getName() { 
     return name; 
    } 

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

    public Parrot getParrot() { 
     return parrot; 
    } 

    public void setParrot(Parrot parrot) { 
     this.parrot = parrot; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public int getSkillCannons() { 
     return skillCannons; 
    } 

    public void setSkillCannons(int skillCannons) { 
     this.skillCannons = skillCannons; 
    } 

    public int getSkillFixing() { 
     return skillFixing; 
    } 

    public void setSkillFixing(int skillFixing) { 
     this.skillFixing = skillFixing; 
    } 

    public int getSkillLeadership() { 
     return skillLeadership; 
    } 

    public void setSkillLeadership(int skillLeadership) { 
     this.skillLeadership = skillLeadership; 
    } 

    public int getSkillMaps() { 
     return skillMaps; 
    } 

    public void setSkillMaps(int skillMaps) { 
     this.skillMaps = skillMaps; 
    } 

    public int getSkillSailing() { 
     return skillSailing; 
    } 

    public void setSkillSailing(int skillSailing) { 
     this.skillSailing = skillSailing; 
    } 


} 

而我的持久性单元

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> 
    <persistence-unit name="piratesPU" transaction-type="RESOURCE_LOCAL"> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <class>org.digitalcorpse.pirates.Battle</class> 
    <class>org.digitalcorpse.pirates.Fleet</class> 
    <class>org.digitalcorpse.pirates.Looting</class> 
    <class>org.digitalcorpse.pirates.Parrot</class> 
    <class>org.digitalcorpse.pirates.Pirate</class> 
    <class>org.digitalcorpse.pirates.Ship</class> 
    <class>org.digitalcorpse.pirates.Store</class> 
    <class>org.digitalcorpse.pirates.TreasureHunt</class> 
    <properties> 
     <property name="hibernate.connection.username" value="piratesPU"/> 
     <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> 
     <property name="hibernate.connection.password" value="pirates"/> 
     <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/piratesPU"/> 
     <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/> 
     <property name="hibernate.hbm2ddl.auto" value="update"/> 
    </properties> 
    </persistence-unit> 
</persistence> 

感谢提前！

Answer 1

你应该对表和列添加这样的映射 @Table（name = “my_pirate_table”）

@Column(name="fleet_column_in_your_table_name", nullable=false) 
public Fleet getFleet() {   
    return fleet;  
}