Java 错误org.hibernate.property.BasicPropertyAccessor-IllegalArgumentException

我正在使用XML映射。我尝试在发票和产品之间建立多对多关联（一张发票可以包含许多产品，一个产品可以属于许多发票）。我的方法是创建一个名为“发票行”的关联，该关联将包含单个产品、其数量和总数，并且该发票行将属于单个发票。 -一张发票有许多发票行 -InvoiceLine具有许多产品，并且具有一个属性，该属性是与发票对应的发票Id 在寻找一种实现这种映射的方法时，我发现不能用一个额外的列创建多对多关联，我需要创建2个一对多关联来替换多对多关联。 这是我尝试过的，但我不断得到错误：

19359 [http-nio-8088-exec-3] ERROR org.hibernate.property.BasicPropertyAccessor - IllegalArgumentException in class: model.InvoiceLine, getter method of property: Product
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of model.InvoiceLine.Product
    at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:195)
    at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:87)
    at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValues(AbstractComponentTuplizer.java:93)
    at org.hibernate.tuple.component.PojoComponentTuplizer.getPropertyValues(PojoComponentTuplizer.java:109)
    at org.hibernate.type.serComponentType.getPropertyValues(ComponentType.java:376)
    at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:207)
    at org.hibernate.engine.EntityKey.generateHashCode(EntityKey.java:126)
    at org.hibernate.engine.EntityKey.<init>(EntityKey.java:70)
    at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:184)
    at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:144)
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
    at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
    at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
    at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
    at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562)
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550)
    at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
    at com.sun.proxy.$Proxy5.save(Unknown Source)
    at dao.GenericDaoHibernateImpl.add(GenericDaoHibernateImpl.java:49)
    at dao.InvoiceLineDaoImpl.ajouter(InvoiceLineDaoImpl.java:12)
    at services.InvoiceLineServiceImpl.ajouter(InvoiceLineServiceImpl.java:25)
    at controller.InvoiceLineServlet.doPost(InvoiceLineServlet.java:123)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:169)
    ... 50 more

引发错误的行是：

        invoiceLineServiceImpl.add(invoiceLine);

add方法是从这个GenericDao继承的：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="model.InvoiceLine" table="INVOICE_LINE">

            <composite-id name="id" class="model.InvoiceLine">

            <key-many-to-one name="Product" entity-name="model.Product"
                column="CODE_PRODUCT" />
            <key-many-to-one name="Invoice" entity-name="model.Invoice"
                column="ID_INVOICE"/>


        </composite-id>

        <property name="qte" column="quantity" />
        <property name="total" column="TOTAL" />


    </class>
</hibernate-mapping>

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping>
   <class name="model.Product" table="PRODUCT">
      <meta attribute="class-description">
      </meta>
      <id name="codeProduct" column="CODE_PRODUCT">
         <generator class="native"/>
      </id>
      <property name="name" column="NAME" />
      <property name="description" column="DESCRIPTION" />
      <property name="price" column="PRICE" />
      <property name="quantityStock" column="QUANTITY_STOCK" />
      <many-to-one name="category" class="model.category" fetch="select" update="true">
            <column name="CODE_CATEGORY" not-null="true" />
      </many-to-one>


                  <set name="invoiceline" table="INVOICE_LINE" inverse="true"
            fetch="select" cascade="all">
            <key>
                <column name="CODE_PRODUCT" not-null="true" />
            </key>
            <one-to-many class="model.InvoiceLine" />
        </set>


   </class>
</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping>
   <class name="model.Invoice" table="INVOICE">
      <meta attribute="class-description">
      </meta>
      <id name="id" column="ID_INVOICE">
         <generator class="native"/>
      </id>
      <property name="date" column="DATE" />
            <property name="total" column="TOTAL" />

      <many-to-one name="client" class="model.Client" fetch="select" update="true">
            <column name="ID_CLIENT" not-null="true" />
      </many-to-one>

                  <set name="InvoiceLine" table="INVOICE_LINE" inverse="true"
            fetch="select" cascade="all">
            <key>
                <column name="ID_INVOICE" not-null="true" />
            </key>
            <one-to-many class="model.InvoiceLine" />
        </set>


   </class>
</hibernate-mapping>

package dao;

import java.io.Serializable;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

@SuppressWarnings("unchecked")
public abstract class GenericDaoHibernateImpl<E, PK extends Serializable> implements GenericDao<E, PK> {
    /**
     * By defining this class as abstract, we prevent Spring from creating
     * instance of this class If not defined as abstract,
     * getClass().getGenericSuperClass() would return Object. There would be
     * exception because Object class does not hava constructor with parameters.
     */
    protected Class<? extends E> daoType;
    public static SessionFactory sessionFactory;

    @SuppressWarnings("rawtypes")
    public GenericDaoHibernateImpl() {
        Type t = getClass().getGenericSuperclass();
        ParameterizedType pt = (ParameterizedType) t;
        daoType = (Class) pt.getActualTypeArguments()[0];
    }

    static {
        try {
            sessionFactory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    public static SessionFactory getSession() {
        return sessionFactory;
    }

    protected Session currentSession() {
        return getSession().getCurrentSession();
    }

    @Override
    public void add(E entity) {
        currentSession().beginTransaction();
        currentSession().save(entity);
        currentSession().getTransaction().commit();

    }

    @Override
    public void update(E entity) {
        currentSession().beginTransaction();
        currentSession().update(entity);
        currentSession().getTransaction().commit();
    }

    @Override
    public void remove(E entity) {
        currentSession().beginTransaction();
        // E oldEntity = (E) currentSession().l;
        currentSession().delete(entity);
        currentSession().getTransaction().commit();
    }

    @Override
    public E find(PK key) {
        currentSession().beginTransaction();
        return (E) currentSession().get(daoType, key);
    }

    @Override
    public List<E> getAll() {
        currentSession().beginTransaction();
        return currentSession().createCriteria(daoType).list();
    }

}

产品实体

package model;

import java.io.Serializable;

public class InvoiceLine implements Serializable{
    private long id;
    private double total;
    public double getTotal() {
        return total;
    }
    public void setTotal(double total) {
        this.total = total;
    }
    public long getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    private Product product;
    private Invoice invoice;
    private int quantity;

    public InvoiceLine() {
        super();
    }
    public InvoiceLine(int quantity) {
        super();

        this.quantity= quantity;
    }

    public Product getProduct() {
        return product;
    }
    public void setProduct(Product product) {
        this.product = product;
    }
    public Invoice getInvoice() {
        return invoice;
    }
    public void setInvoice(Invoice invoice) {
        this.invoice= invoice;
    }
    public int getQuantity() {
        return quantity;
    }
    public void setQuantity(int quantity) {
        this.quantity= quantity;
    }



}

package model;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

public class Product implements Serializable{

    private int codeProduct;
    private String name;
    private String description;
    private Double price;
    private int quantityStock;
    private Category category;
    private Set<InvoiceLine> invoiceLine= new HashSet<InvoiceLine>();

    public Set<InvoiceLine> getInvoiceLine() {
        return invoiceLine;
    }

    public void setInvoiceLine(Set<InvoiceLine> invoiceLine) {
        this.invoiceLine= invoiceLine;
    }

    public Product() {
    }

    public Product(String name, String description, Double price, int quantityStock) {
        this.name = name;
        this.description = description;
        this.price = price;
        this.quantityStock = quantityStock;
    }

    // getters and setters
    public int getCodeProduct() {
        return codeProduct;
    }

    public void setCodeProduct(int codeProduct) {
        this.codeProduct = codeProduct;
    }

    public String getName() {
        return name;
    }

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

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Double getPrice() {
        return price;
    }

    public void setPrice(Double price) {
        this.price= price;
    }

    public Category getCategory() {
        return category;
    }

    public void setCategory(Category category) {
        this.category = category;
    }

    public int getQuantityStock() {
        return quantityStock;
    }

    public void setQuantityStock(int quantityStock) {
        this.quantityStock = quantityStock;
    }

}

包模型；
导入java.io.Serializable；
导入java.util.HashSet；
导入java.util.Set；
公共类产品实现可序列化{
私人产品；
私有字符串名称；
私有字符串描述；
私人双价；
私人股票；
私人类别；
private Set invoiceLine=new HashSet（）；
公共集getInvoiceLine（）{
返回发票行；
}
公共作废设置发票行（设置发票行）{
this.invoiceLine=invoiceLine；
}
公共产品（）{
}
公共产品（字符串名称、字符串描述、双倍价格、整数数量股票）{
this.name=名称；
this.description=描述；
这个价格=价格；
this.quantityStock=quantityStock；
}
//接球手和接球手
public int getCodeProduct（）{
返回代码产品；
}
公共无效setCodeProduct（int codeProduct）{
this.codeProduct=codeProduct；
}
公共字符串getName（）{
返回名称；
}
公共void集合名（字符串名）{
this.name=name；
}
公共字符串getDescription（）{
返回说明；
}
公共void集合描述（字符串描述）{
this.description=描述；
}
公开双价{
退货价格；
}
公共定价（双倍价格）{
这个。价格=价格；
}
公共类别getCategory（）{
退货类别；
}
公共无效集合类别（类别）{
this.category=类别；
}
public int getQuantityStock（）{
退货数量库存；
}
公共无效setQuantityStock（int quantityStock）{
this.quantityStock=quantityStock；
}
}

尝试使用 product.hbm.xml中的

及

在InvoiceLine.hbm.xml中尝试使用 product.hbm.xml中的

及

---

在InvoiceLine.hbm.xml中，您是否可以尝试使用

更改您的定义？我担心这并不能解决此错误。是否有任何特定原因在我使用的此定义中使用实体名称属性以及相同的错误显示您尝试使用
更改您的定义？我担心这并不能解决此错误。是否有任何特定的原因在这个定义中使用entity name属性的原因我使用了和和，同样的错误显示很抱歉，这不是我已经在做的吗？我看不到你对代码所做的更改。我已经在Product.hbm.xml中有了行，在InvoiceLine.hbm.xmlclass=“model.Category”中的复合id中也有了行，这里的类名以正楷开头，而name=“Product”这里的对象名以小写字母开头，很抱歉，这不是我正在做的吗？我看不到你对代码所做的更改。我已经在Product.hbm.xml中有行，在InvoiceLine.hbm.xmlclass=“model.Category”中的复合id中有行，这里的类名以正楷开头，而name=“Product”这里的对象名以小写字母开头
package model;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

public class Product implements Serializable{

    private int codeProduct;
    private String name;
    private String description;
    private Double price;
    private int quantityStock;
    private Category category;
    private Set<InvoiceLine> invoiceLine= new HashSet<InvoiceLine>();

    public Set<InvoiceLine> getInvoiceLine() {
        return invoiceLine;
    }

    public void setInvoiceLine(Set<InvoiceLine> invoiceLine) {
        this.invoiceLine= invoiceLine;
    }

    public Product() {
    }

    public Product(String name, String description, Double price, int quantityStock) {
        this.name = name;
        this.description = description;
        this.price = price;
        this.quantityStock = quantityStock;
    }

    // getters and setters
    public int getCodeProduct() {
        return codeProduct;
    }

    public void setCodeProduct(int codeProduct) {
        this.codeProduct = codeProduct;
    }

    public String getName() {
        return name;
    }

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

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Double getPrice() {
        return price;
    }

    public void setPrice(Double price) {
        this.price= price;
    }

    public Category getCategory() {
        return category;
    }

    public void setCategory(Category category) {
        this.category = category;
    }

    public int getQuantityStock() {
        return quantityStock;
    }

    public void setQuantityStock(int quantityStock) {
        this.quantityStock = quantityStock;
    }

}

 <key-many-to-one name="product" entity-name="model.Product"
                column="CODE_PRODUCT" />