org.hibernate.hql.ast.QuerySyntaxException:产品未映射[来自产品]

时间:2010-08-30 21:40:05

标签: hibernate netbeans

我当天真气的问题是:

我正在尝试使用Hibernate来访问数据库。经过一系列错误的启动后,我放弃了我的特定项目,并选择使用Netbeans 6.9附带的示例数据库和向导。

我启动了Netbeans,启动了示例Derby数据库,并按照本教程中的说明进行操作:http://netbeans.org/kb/docs/java/hibernate-java-se.html,跳过有关MySQL数据库的信息,并在适当的情况下用Derby sample数据库替换信息。

我的所有谷歌搜索都告诉我,我正在犯一个菜鸟的错误并提到表名而不是类名。我确信自己并非如此[1]。引用课程的方法很多。除此之外,我很困惑。我只使用了向导,我使用了示例数据库,我找不到任何其他可能搞砸的东西。

我右键点击hibernate.cfg.xml,选择Run HQL Query(就像在教程中一样)并在运行查询from Product

时在上面的问题标题中获取例外

请在肝脏放出之前帮助我。

[1]这是你们其中一个人会证明我错的地方。

hibernate.cfg.xml中

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 <hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property>
    <property name="hibernate.connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>
    <property name="hibernate.connection.url">jdbc:derby://localhost:1527/sample</property>
    <property name="hibernate.connection.username">app</property>
    <property name="hibernate.connection.password">app</property>
<property name="hibernate.show_sql">true</property>
<mapping resource="sample/db/PurchaseOrder.hbm.xml"/>
<mapping resource="sample/db/Customer.hbm.xml"/>
<mapping resource="sample/db/MicroMarket.hbm.xml"/>
<mapping resource="sample/db/ProductCode.hbm.xml"/>
<mapping resource="sample/db/Product.hbm.xml"/>
<mapping resource="sample/db/Manufacturer.hbm.xml"/>
<mapping resource="sample/db/DiscountCode.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

Product.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Aug 30, 2010 3:57:50 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
  <class name="sample.db.Product" schema="APP" table="PRODUCT">
    <id name="productId" type="int">
      <column name="PRODUCT_ID"/>
      <generator class="assigned"/>
    </id>
    <property name="manufacturerId" type="int">
      <column name="MANUFACTURER_ID" not-null="true"/>
    </property>
    <property name="productCode" type="string">
      <column length="2" name="PRODUCT_CODE" not-null="true"/>
    </property>
    <property name="purchaseCost" type="big_decimal">
      <column name="PURCHASE_COST" precision="12"/>
    </property>
    <property name="quantityOnHand" type="java.lang.Integer">
      <column name="QUANTITY_ON_HAND"/>
    </property>
    <property name="markup" type="big_decimal">
      <column name="MARKUP" precision="4"/>
    </property>
    <property name="available" type="string">
      <column length="5" name="AVAILABLE"/>
    </property>
    <property name="description" type="string">
      <column length="50" name="DESCRIPTION"/>
    </property>
  </class>
</hibernate-mapping>

Product.java

package sample.db;
// Generated Aug 30, 2010 3:57:50 PM by Hibernate Tools 3.2.1.GA


import java.math.BigDecimal;

/**
 * Product generated by hbm2java
 */
public class Product  implements java.io.Serializable {


     private int productId;
     private int manufacturerId;
     private String productCode;
     private BigDecimal purchaseCost;
     private Integer quantityOnHand;
     private BigDecimal markup;
     private String available;
     private String description;

    public Product() {
    }


    public Product(int productId, int manufacturerId, String productCode) {
        this.productId = productId;
        this.manufacturerId = manufacturerId;
        this.productCode = productCode;
    }
    public Product(int productId, int manufacturerId, String productCode, BigDecimal purchaseCost, Integer quantityOnHand, BigDecimal markup, String available, String description) {
       this.productId = productId;
       this.manufacturerId = manufacturerId;
       this.productCode = productCode;
       this.purchaseCost = purchaseCost;
       this.quantityOnHand = quantityOnHand;
       this.markup = markup;
       this.available = available;
       this.description = description;
    }

    public int getProductId() {
        return this.productId;
    }

    public void setProductId(int productId) {
        this.productId = productId;
    }
    public int getManufacturerId() {
        return this.manufacturerId;
    }

    public void setManufacturerId(int manufacturerId) {
        this.manufacturerId = manufacturerId;
    }
    public String getProductCode() {
        return this.productCode;
    }

    public void setProductCode(String productCode) {
        this.productCode = productCode;
    }
    public BigDecimal getPurchaseCost() {
        return this.purchaseCost;
    }

    public void setPurchaseCost(BigDecimal purchaseCost) {
        this.purchaseCost = purchaseCost;
    }
    public Integer getQuantityOnHand() {
        return this.quantityOnHand;
    }

    public void setQuantityOnHand(Integer quantityOnHand) {
        this.quantityOnHand = quantityOnHand;
    }
    public BigDecimal getMarkup() {
        return this.markup;
    }

    public void setMarkup(BigDecimal markup) {
        this.markup = markup;
    }
    public String getAvailable() {
        return this.available;
    }

    public void setAvailable(String available) {
        this.available = available;
    }
    public String getDescription() {
        return this.description;
    }

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




}

2 个答案:

答案 0 :(得分:0)

Netbeans HQL Query运行器似乎已被打破。我按照Pascal Thivent的建议,一切正常。

如果其他人发现自己遇到了同样的问题并提出了修复方法,请在此处发布,我会将其标记为答案。

答案 1 :(得分:0)

我遇到了同样的问题 - 让[classname]没有映射来自hibernate的异常。

但是我在阅读你的帖子后发现的一个不同之处是,当你通过右键单击hibernate.cfg.xml运行时,我没有得到异常,从NB中选择Run HQL Query。查询运行时没有任何错误/警告。

然后我检查了我的代码,发现我的代码中的config.addClass()行中存在愚蠢的拼写错误。纠正这解决了我的问题。