org.hibernate.hql.internal.ast.QuerySyntaxException：表未映射

Question

我有示例Web应用程序Hibernate 4.3.5 + Derby数据库10.10.1.1+具有IDE NetBeans 8.0Beta的Glassfish4.0。

我有一个异常：

Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: CUSTOMERV is not mapped 
at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:189) 
at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:109) 
at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:95) 
at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:331) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3633) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3522) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299) 
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247) 
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:278) 
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206) 
... 72 more 

从的index.xhtml

<h:panelGrid id="panel1" columns="2" border="1" 
       cellpadding="5" cellspacing="1"> 
     <f:facet name="header"> 
      <h:outputText value="Add Customer Information"/> 
     </f:facet> 
     <h:outputLabel value="First Name:"/> 
     <h:inputText value="#{customer.firstName}" id="fn"/> 
     <h:outputLabel value="Last Name:"/> 
     <h:inputText value="#{customer.lastName}" id="ln"/> 
     <h:outputLabel value="Email:"/> 
     <h:inputText value="#{customer.email}" id="eml"/> 
     <h:outputLabel value="Date of Birth:"/> 
     <h:inputText value="#{customer.sd}" id="s"/> 
     <f:facet name="footer"> 
      <h:outputLabel value="#{customer.msg}" id="msg" styleClass="msg"/> 
      <h:commandButton value="Save" action="#{customer.saveCustomer}"> 
      </h:commandButton> 
     </f:facet> 
    </h:panelGrid> 

表Customer.java

package com.javaknowledge.entity; 

    import com.javaknowledge.dao.CustomerDao; 
    import java.text.ParseException; 
    import java.text.SimpleDateFormat; 
    import java.util.ArrayList; 
    import java.util.Date; 
    import java.util.List; 
    import javax.faces.bean.ManagedBean; 
    import javax.faces.bean.SessionScoped; 
    import javax.persistence.*;  

    @ManagedBean 
    @SessionScoped 

    public class Customer implements java.io.Serializable { 

    private Integer custId; 
    private String firstName; 
    private String lastName; 
    private String email; 
    private Date dob; 
    private String sd, msg, selectedname; 
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 


    public Customer() { 
    } 

    public Customer(String firstName, String lastName, String email, Date dob) { 
     this.firstName = firstName; 
     this.lastName = lastName; 
     this.email = email; 
     this.dob = dob; 
    } 

    public String getSd() { 
     return sd; 
    } 

    public void setSd(String sd) { 
     this.sd = sd; 
    } 

    public Integer getCustId() { 
     return this.custId; 
    } 

    public void setCustId(Integer custId) { 
     this.custId = custId; 
    } 

    public String getFirstName() { 
     return this.firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getLastName() { 
     return this.lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 
    @Column(name = "EMAIL") 
    public String getEmail() { 
     return this.email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    @Column(name = "DOB") 
    public Date getDob() { 
     return this.dob; 
    } 

    public void setDob(Date dob) { 
     this.dob = dob; 
    } 

    public String getMsg() { 
     return msg; 
    } 

    public void setMsg(String msg) { 
     this.msg = msg; 
    } 

    public String getSelectedname() { 
     return selectedname; 
    } 

    public void setSelectedname(String selectedname) { 
     this.selectedname = selectedname; 
    } 

    public void saveCustomer() { 
     try { 
      Date d = sdf.parse(sd); 
      System.out.println(d); 
      this.dob = d; 
     } catch (ParseException e) { 
      e.printStackTrace(); 
     } 
     CustomerDao dao = new CustomerDao(); 
     dao.addCustomer(this); 
     this.msg = "Member Info Saved Successfull!"; 
     clearAll(); 
    } 
    public void updateCustomer() { 
     try { 
      Date d = sdf.parse(sd); 
      System.out.println(d); 
      this.dob = d; 
     } catch (ParseException e) { 
      e.printStackTrace(); 
     } 
     CustomerDao dao = new CustomerDao(); 
     dao.updateCustomer(this); 
     this.msg = "Member Info Update Successfull!"; 
     clearAll(); 
    } 
    public void deleteCustomer() { 
     CustomerDao dao = new CustomerDao(); 
     dao.deleteCustomer(custId); 
     this.msg = "Member Info Delete Successfull!"; 
     clearAll(); 
    } 

    public List<Customer> getAllCustomers() { 
     List<Customer> users = new ArrayList<Customer>(); 
     CustomerDao dao = new CustomerDao(); 
     users = dao.getAllCustomers(); 
     return users; 
    } 

    public void fullInfo() { 
     CustomerDao dao = new CustomerDao(); 
     List<Customer> lc = dao.getCustomerById(selectedname); 
     System.out.println(lc.get(0).firstName); 
     this.custId = lc.get(0).custId; 
     this.firstName = lc.get(0).firstName; 
     this.lastName = lc.get(0).lastName; 
     this.email = lc.get(0).email; 
     this.dob = lc.get(0).dob; 
     this.sd = sdf.format(dob); 
    } 

    private void clearAll() { 
     this.firstName = ""; 
     this.lastName = ""; 
     this.sd = ""; 
     this.email = ""; 
     this.custId=0; 
    } 

    } 

的hibernate.cfg.xml

<?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/derbyDB</property> 
    <property name="hibernate.connection.username">user1</property> 
    <property name="hibernate.connection.password">user1</property> 
    <property name="hibernate.hbm2ddl.auto">create</property> 

    <property name="c3p0.min_size">1</property> 
    <property name="c3p0.max_size">5</property> 
    <property name="c3p0.timeout">300</property> 
    <property name="c3p0.max_statements">50</property> 
    <property name="c3p0.idle_test_period">300</property> 

    <mapping class="com.javaknowledge.entity.Customer" resource="com/javaknowledge/entity/Customer.hbm.xml"/> 
    </session-factory> 
</hibernate-configuration> 

Customer.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"> 
<hibernate-mapping> 
    <class name="com.javaknowledge.entity.Customer" table="CUSTOMERV" schema="APP"> 
     <id name="custId" type="java.lang.Integer"> 
      <column name="cust_id" /> 
      <generator class="increment" /> 
     </id> 
     <property name="firstName" type="string"> 
      <column name="first_name" length="45" not-null="true" /> 
     </property> 
     <property name="lastName" type="string"> 
      <column name="last_name" length="45" not-null="true" /> 
     </property> 
     <property name="email" type="string"> 
      <column name="email" length="45" not-null="true" /> 
     </property> 
     <property name="dob" type="date"> 
      <column name="dob" length="10" not-null="true" /> 
     </property> 
    </class> 
</hibernate-mapping> 

Answer 1

最后，我发现了一个错误！希望这对某人有用。在向数据库发出请求时（在我的情况下是Apache Derby），基本名称需要以小写字母写第一个字母大写。

这是错误的查询：

session.createQuery("select first_name from CUSTOMERV"). 

这是有效的查询

session.createQuery("select first_name from Customerv"). 

和类实体必须是相同的名称数据库，但我不知道。

Answer 2

问题部分地得到了解决。除了创建jdbc /资源（DB Derby）之外，还必须在Glassfish管理控制台中为db资源创建JDBC连接池，并在ping中检查它。现在所有的CRUD操作都可以正常工作。我检查，对象Customer在数据库添加正确，更新和删除。但在Glassfish的输出日志具有相同的异常：

SEVERE: org.hibernate.hql.internal.ast.QuerySyntaxException: CUSTOMERV is not mapped [select concat(first_name, ' ', last_name) as name from CUSTOMERV] 
    at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:96) 
    at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:120) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:234) 
    ....... 

Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: CUSTOMERV is not mapped 
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:189) 
    at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:109) 

Answer 3

可能这会使它更清晰，当然也是有意义的。

@Entity 
@Table(name = "users") 

/** 
* 
* @author Ram Srinvasan 
* Use class name in NamedQuery 
* Use table name in NamedNativeQuery 
*/ 
@NamedQueries({ @NamedQuery(name = "findUserByName", query = "from User u where u.name= :name") }) 

@NamedNativeQueries({ @NamedNativeQuery(name = "findUserByNameNativeSQL", query = "select * from users u where u.name= :name", resultClass = User.class) }) 
public class User implements Principal { 
... 
} 

Answer 4

有更多的机会得到这个例外，甚至我们使用的类名，即如果我们有两个班在不同的包相同的名称。我们会得到这个问题。

我觉得休眠可能会模糊和抛出此异常，因此该解决方案是使用完全合格的名称（如com.test.Customerv）

我说这个答案，因为我提到，将在场景中帮助。我得到了同样的情况被卡住了一段时间。

Answer 5

hibernate.cfg.xml文件应该具有如下表格的映射。检查你的文件是否丢失。

...... 
<hibernate-configuration> 
...... 
...... 
    <session-factory> 
...... 
<mapping class="com.test.bean.dbBean.testTableHibernate"/> 
...... 
</session-factory> 

</hibernate-configuration> 
..... 

Answer 6

在HQL查询不写表的名称在您的查询像 字符串s“从entity_cllass名” =写你的实体类名称; query qry = session.createUqery（s）;