如何使用hibernate 4.1.10.Final插入？ [英] How to insert using hibernate 4.1.10.Final?

问题描述

我使用hibernate 4.1.10.Final将数据插入到数据库中，但它会抛出以下异常：

我有三个表，即开发地址。 / p>

开发本身具有地址对象。

  INFO：HCANN000001 ：Hibernate Commons Annotations {4.0.1.Final} 
 INFO：HHH000412：Hibernate Core {4.1.10.Final} 
 INFO：HHH000206：找不到hibernate.properties 
 INFO：HHH000021：Bytecode提供程序名称：javassist 
 INFO：HHH000043：从资源配置：/hibernate.cfg.xml 
 INFO：HHH000040：配置资源：/hibernate.cfg.xml 
 INFO：HHH000041：配置的SessionFactory： null 
 SEVERE：java.lang.NullPointerException $ b $ org.hibernate.mapping.PersistentClass.createPrimaryKey（PersistentClass.java:327）
 at org.hibernate.cfg.CreateKeySecondPass.doSecondPass（CreateKeySecondPass。 java：48）
在org.hibernate.cfg.Configuration.processSecondPassesOfType（Configuration.java:1386） 
 at org.hibernate.cfg.Configuration.secondPassCompile（Configuration.java:1341）
 at org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1730）
 at com.myproject .util.HibernateUtil.configureSessionFactory（HibernateUtil.java:23）
 at com.myproject.util.HibernateUtil.getSessionFactory（HibernateUtil.java:34）
 at com.myproject.model.ConstructionModel.addDevelopment（ConstructionModel .java：185）
 at com.myproject.controller.Construction.addDevelopment（Construction.java:135）
 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）
 at sun.reflect .NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）
 at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）
 at java.lang.reflect.Method.invoke（Method.java:601 ）
 ...... 
  

我的密码

development.java

  @Entity 
 @Table（name =development）
 public class Development实现Serializable {
 
 private int id; 
私人地址; 
 
 public Development（）{
 
} 
 @Id 
 @GeneratedValue 
 @Column（name =id）
 public int getId（）{
 return id; 
} 
 
 public void setId（int id）{
 this.id = id; 
 
 
 @OneToOne（cascade = CascadeType.ALL）
 @PrimaryKeyJoinColumn 
 public Address getAddress（）{
 return this.address; 
} 
 
 public void setAddress（Address address）{
 this.address = address; 
} 
 
 
} 
  

address.java

  @Entity 
 @Table（name =address）
 public class Address实现Serializable {
 
 private int id; 
私人字符串单位; 
 
公共地址（）{
 
} 
 
 
 @Id 
 @GeneratedValue 
 @OneToOne（mappedBy =address）
 @JoinColumn（name =addid）
 public int getId（）{
 return id; 
 
 
 $ b @Column（name =unit）
 public String getUnit（）{
 return unit; 
} 
 
 public void setId（int id）{
 this.id = id; 
} 
 
 
 public void setUnit（String unit）{
 this.unit = unit; 
} 
 
 
} 
  

解决方案

删除 @GeneratedValue @OneToOne（mappedBy =development）@JoinColumn（name =Developer）和 @GeneratedValue @OneToOne（mappedBy =address）@JoinColumn（name =addid）来自开发人员和地址的Id字段。

I am using hibernate 4.1.10.Final to insert data into database, but it throws the following exception,

I have three tables, development and address .

Development has an object of address in itself.

INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
INFO: HHH000412: Hibernate Core {4.1.10.Final}
INFO: HHH000206: hibernate.properties not found
INFO: HHH000021: Bytecode provider name : javassist
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
INFO: HHH000041: Configured SessionFactory: null
SEVERE: java.lang.NullPointerException
    at org.hibernate.mapping.PersistentClass.createPrimaryKey(PersistentClass.java:327)
    at org.hibernate.cfg.CreateKeySecondPass.doSecondPass(CreateKeySecondPass.java:48)
    at org.hibernate.cfg.Configuration.processSecondPassesOfType(Configuration.java:1386)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1341)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1730)
    at com.myproject.util.HibernateUtil.configureSessionFactory(HibernateUtil.java:23)
    at com.myproject.util.HibernateUtil.getSessionFactory(HibernateUtil.java:34)
    at com.myproject.model.ConstructionModel.addDevelopment(ConstructionModel.java:185)
    at com.myproject.controller.Construction.addDevelopment(Construction.java:135)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
      ......

My code

development.java

@Entity
@Table(name="development")
public class Development implements Serializable{

    private int id;
    private Address address;

    public Development(){

    }
    @Id
    @GeneratedValue
    @Column(name="id")
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @OneToOne(cascade = CascadeType.ALL)
    @PrimaryKeyJoinColumn 
    public Address getAddress() {
        return this.address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }


}

address.java

@Entity
@Table(name="address")
public class Address implements Serializable{

    private int id;
    private String unit;

    public Address(){

    }


    @Id
    @GeneratedValue
    @OneToOne(mappedBy="address")
    @JoinColumn(name="addid")
    public int getId() {
        return id;
    }


    @Column (name="unit")
    public String getUnit() {
        return unit;
    }

    public void setId(int id) {
        this.id = id;
    }


    public void setUnit(String unit) {
        this.unit = unit;
    }


}

解决方案

Remove @GeneratedValue @OneToOne(mappedBy="development") @JoinColumn(name="Developer") and @GeneratedValue @OneToOne(mappedBy="address") @JoinColumn(name="addid") from Id fields of Developer and Address.

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