org.hibernate.MappingException:未知实体：domain.ShoppingCart$Proxy$\u$$\ uWeldClientProxy

我遇到了一个奇怪的错误，我无法调试。如果你能详细介绍一下细节并给我一些建议，我将不胜感激，我的朋友们

我正在使用JBossServer7.1

Web应用程序适用于所有模块。但当我在购物车中处理完产品并进行“结帐”时，就会出现异常

我提供了几乎所有需要的信息，如果你还需要什么，请告诉我。我真的很感激你的善意回应。非常感谢查看我的请求

我在项目中包含的库（JBoss自己包含的库除外）

HibernateUtil.java

public static SessionFactory getSessionFactory() {
        try{
            Configuration conf=new Configuration();
            conf.configure("/com/webshop/hb/config/mycfg-mysql.xml");
             sessionFactory =conf.buildSessionFactory(); 
            }catch(Exception e){
                e.printStackTrace();
            }
        return sessionFactory;
}

package domain;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import javax.enterprise.context.SessionScoped;
import javax.inject.Named;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import java.io.Serializable;

@Named
@SessionScoped
@Entity
public class ShoppingCart implements Serializable { private static long currentId =1;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name="ID")
    private long id;
    @Column(name="date")
    private Date date;
    @ManyToOne
    @JoinColumn(name="user")
    private User user;

    @ElementCollection
    private Map<Product, Integer> orders = new HashMap<Product, Integer>();

    @Column(name="status")
    private OrderStatus status; // String 

    public ShoppingCart() {
        this(new Date());
    }

    public ShoppingCart(Date date) {
        super();
        this.id = currentId++; // Simple way of getting an unique id. To be deferred to the DBMS later.
        this.date = date;
        this.status = OrderStatus.EMPTY;
    }

    public ShoppingCart(Date date, User user) {
        this(date);
        this.user = user;
    }

    public ShoppingCart(Date date, User user, OrderStatus status) {
        this(date, user);
        if (((status == OrderStatus.COMPLETED) || (status == OrderStatus.PAID)) && (this.getUser() == null)) {
            throw new IllegalStateException("No user specified for complete or paid orders");
        }
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Map<Product, Integer> getOrders() {
        return orders;
    }

    public void setOrders(Map<Product, Integer> orders) {
        this.orders = orders;
    }

    public OrderStatus getStatus() {
        return status;
    }

    public void setCompleted(OrderStatus status) throws IllegalStateTransitionException {
        if ((status == OrderStatus.COMPLETED) && (this.getUser() == null)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.COMPLETED.toString(), "Customer empty");
        }
        if ((status == OrderStatus.PAID) && (this.getUser() == null)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.PAID.toString(), "Customer empty");
        }
        if ((status == OrderStatus.PAID) && (this.getStatus() != OrderStatus.COMPLETED)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.PAID.toString(), "Can only go to paid for completed orders");
        }
        this.status = status;
    }

    public long getId() {
        return id;
    }

    public void addToCart(Product product, int amountSelected) {
        if (orders.containsKey(product)) {
            int amount = orders.get(product);
            amount +=amountSelected;
            orders.put(product, amount);
        }
        else {
            orders.put(product, amountSelected);
        }
    }

    public void removeFromCart(Product product) {
        if (orders.containsKey(product)) {
            int amount = orders.get(product);
            amount --;
            if (amount <= 0) {
                orders.remove(product);
            }
            else {
                orders.put(product, amount);
            }
        }
    }

    public int getNumberOfItems() {
        Set<Product> uniqueProducts = orders.keySet();
        int amount = 0;
        for (Product aProduct: uniqueProducts) {
            amount += orders.get(aProduct);
        }
        return amount;
    }

    @Override
    public String toString() {
        DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
        Calendar cal = Calendar.getInstance();
        return "Order of " + this.user + ", date " + dateFormat.format(cal.getTime());
    }
}

ShoppingCart.java

public static SessionFactory getSessionFactory() {
        try{
            Configuration conf=new Configuration();
            conf.configure("/com/webshop/hb/config/mycfg-mysql.xml");
             sessionFactory =conf.buildSessionFactory(); 
            }catch(Exception e){
                e.printStackTrace();
            }
        return sessionFactory;
}

package domain;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import javax.enterprise.context.SessionScoped;
import javax.inject.Named;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import java.io.Serializable;

@Named
@SessionScoped
@Entity
public class ShoppingCart implements Serializable { private static long currentId =1;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name="ID")
    private long id;
    @Column(name="date")
    private Date date;
    @ManyToOne
    @JoinColumn(name="user")
    private User user;

    @ElementCollection
    private Map<Product, Integer> orders = new HashMap<Product, Integer>();

    @Column(name="status")
    private OrderStatus status; // String 

    public ShoppingCart() {
        this(new Date());
    }

    public ShoppingCart(Date date) {
        super();
        this.id = currentId++; // Simple way of getting an unique id. To be deferred to the DBMS later.
        this.date = date;
        this.status = OrderStatus.EMPTY;
    }

    public ShoppingCart(Date date, User user) {
        this(date);
        this.user = user;
    }

    public ShoppingCart(Date date, User user, OrderStatus status) {
        this(date, user);
        if (((status == OrderStatus.COMPLETED) || (status == OrderStatus.PAID)) && (this.getUser() == null)) {
            throw new IllegalStateException("No user specified for complete or paid orders");
        }
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Map<Product, Integer> getOrders() {
        return orders;
    }

    public void setOrders(Map<Product, Integer> orders) {
        this.orders = orders;
    }

    public OrderStatus getStatus() {
        return status;
    }

    public void setCompleted(OrderStatus status) throws IllegalStateTransitionException {
        if ((status == OrderStatus.COMPLETED) && (this.getUser() == null)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.COMPLETED.toString(), "Customer empty");
        }
        if ((status == OrderStatus.PAID) && (this.getUser() == null)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.PAID.toString(), "Customer empty");
        }
        if ((status == OrderStatus.PAID) && (this.getStatus() != OrderStatus.COMPLETED)) {
            throw new IllegalStateTransitionException(this.getStatus().toString(), OrderStatus.PAID.toString(), "Can only go to paid for completed orders");
        }
        this.status = status;
    }

    public long getId() {
        return id;
    }

    public void addToCart(Product product, int amountSelected) {
        if (orders.containsKey(product)) {
            int amount = orders.get(product);
            amount +=amountSelected;
            orders.put(product, amount);
        }
        else {
            orders.put(product, amountSelected);
        }
    }

    public void removeFromCart(Product product) {
        if (orders.containsKey(product)) {
            int amount = orders.get(product);
            amount --;
            if (amount <= 0) {
                orders.remove(product);
            }
            else {
                orders.put(product, amount);
            }
        }
    }

    public int getNumberOfItems() {
        Set<Product> uniqueProducts = orders.keySet();
        int amount = 0;
        for (Product aProduct: uniqueProducts) {
            amount += orders.get(aProduct);
        }
        return amount;
    }

    @Override
    public String toString() {
        DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
        Calendar cal = Calendar.getInstance();
        return "Order of " + this.user + ", date " + dateFormat.format(cal.getTime());
    }
}

---

对我来说，原因很明显：您的

ShoppingCart

实体也是一个CDI管理的bean。我几乎可以肯定，您正在将

shoppingcart

注入方法

confirmOrder

上方的某个位置：

@Inject
ShoppingCart shoppingcart;

我说得对吗？如果是，那么这就是原因

通常JPA实体作为CDIBeans。这背后的原因是防止BeanManager执行可能导致JPA提供程序中断的操作（因为这会导致异常）

因此，请尝试以下方法：

package domain;

@Entity
public class ShoppingCart implements Serializable {
     // ...
}

然后定义另一个类，该类保存上述实体：

package com.some_package;

@Named
@SessionScoped
public class ShoppingCartWrapper {

     ShoppingCart store = new ShoppingCart(); // this is your entity
}

这个类可以被注入到任何你想要的地方。然后保存看起来像：

public String confirmOrder() throws IllegalStateTransitionException {

      // ...
      Session session = HibernateUtil.getSessionFactory().openSession();
      session.beginTransaction();
      session.save(shoppingCartWrapper.getStore()); 
      session.close();
      // ...
}

顺便说一句：个人提示：像这样管理事务-我的意思是“手工”，没有拦截器很容易出错，并且不会使代码变得干净