我有 2 个类,即与 Address 类有 ManyToOne 关系的 Person 类。当我试图获取人员时,地址对象内部有空元素,为什么会发生这种情况?懒惰的配置不起作用?我可以级联保存带有地址的人员对象。
这是我的代码:
人物类:
public class Person implements java.io.Serializable {
private int idPerson;
private String name;
private String surname;
private String dni;
private Date dateBirth;
private String cellPhone;
private String landPhone;
private String email;
private String discr;
private Address address ;
public Person() {
}
// ¡gett
ers 和 setters } 我的地址类:
public class Address implements java.io.Serializable {
private int idAddress;
private City city;
private String street;
private String number;
private Integer apartament;
private int level;
public Address() {
}
//getters an setters
}
我的两个映射文件:
<hibernate-mapping>
<class name="com.efix.model.enterprise.Address" table="address" schema="public">
<id name="idAddress" type="int">
<column name="id_address" />
<generator class="assigned" />
</id>
<many-to-one name="city" class="com.efix.model.enterprise.City" cascade="all" lazy="false">
<column name="id_city" not-null="true" />
</many-to-one>
<property name="street" type="string">
<column name="street" length="60" not-null="true" />
</property>
<property name="number" type="string">
<column name="number" length="6" />
</property>
<property name="apartament" type="java.lang.Integer">
<column name="apartament" />
</property>
<property name="level" type="int">
<column name="level" not-null="true" />
</property>
</class>
</hibernate-mapping>
上面是地址映射,这是我的人映射:
<!-- Sublcase cliente -->
<subclass name="com.efix.model.enterprise.Client" discriminator-value="Client">
<property name="notes" type="string">
<column name="notes" />
</property>
</subclass>
</class>
</hibernate-mapping>
我的 NullPointerException 在这段代码中抛出:
ClientServiceImpl serviceImpl = new ClientServiceImpl();
for (Client cli : serviceImpl.findAll()) {
System.out.println(cli.getAddress().getNumber());
先谢谢了!!