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私はHibernateを初めて使用しています。org.hibernate.hql.internal.ast.QuerySyntaxException：ユーザーがマップされていません
Oracle 10g DB接続で、Hibernateを使用したオンラインユーザーアンケートを作成しようとしています。問題の突風を解決した後、私はこの問題で立ち往生されています：
HTTP Status 500 - org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [select max(users.id) from User users]
はここUserDAO.java
public class UserDAO {
Session session = HibernateUtil.getSessionFactory().openSession();
public void save(User user){
session.beginTransaction();
session.save(user);
session.getTransaction().commit();
session.close();
}
public Integer getId(){
String hql = "select max(users.id) from User users";
Query query = session.createQuery(hql);
List<Integer> results = query.list();
Integer userId = 1;
if (results.get(0) != null) {
userId = results.get(0) + 1;
}
return userId;
}
}
ここUser.javaがあるさ：ここでは
@Entity
@Table(name="User")
public class User {
@Column(name="firstname")
private String firstname;
@Column(name="lastname")
private String lastname;
@Column(name="address")
private String address;
@Column(name="city")
private String city;
@Column(name="state")
private String state;
@Column(name="zip")
private String zip;
@Column(name="phone")
private String phone;
@Id
@Column(name="email")
private String email;
@Column(name="date")
private Date todayDate;
@Column(name="semdate")
private Date semDate;
// ...
}
はHibernateUtilのです.java：
public class HibernateUtil {
private static SessionFactory sessionFactory ;
static {
Configuration configuration = new Configuration().configure();
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties());
sessionFactory = configuration.buildSessionFactory(builder.build());
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
彼女eはhibernate.cfg.xmlのです：
<?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.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@apollo.vse.gmu.edu:1521:ite10g</property>
<property name="hibernate.connection.username">name</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="hibernate.default_schema">name</property>
<property name="show_sql">true</property>
</session-factory>
</hibernate-configuration>
編集：私はここで素晴らしい人々が提案し何をした
、それがXMLファイルにマッピングクラスを追加することです。元のエラーは削除されました。しかし、今、私はいくつかの他のエラー直面しています： HTTPステータス500 - org.hibernate.exception.GenericJDBCException：
type Exception report
message org.hibernate.exception.GenericJDBCException: could not extract ResultSet
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.faces.el.EvaluationException: org.hibernate.exception.GenericJDBCException: could not extract ResultSet
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
org.hibernate.exception.GenericJDBCException: could not extract ResultSet
org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54)
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:89)
org.hibernate.loader.Loader.getResultSet(Loader.java:2065)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1862)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838)
org.hibernate.loader.Loader.doQuery(Loader.java:909)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
org.hibernate.loader.Loader.doList(Loader.java:2553)
org.hibernate.loader.Loader.doList(Loader.java:2539)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369)
org.hibernate.loader.Loader.list(Loader.java:2364)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387)
org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)
org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
com.pratikshinde.swe645.UserDAO.getId(UserDAO.java:18)
com.pratikshinde.swe645.StudentService.saveUser(StudentService.java:361)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:497)
org.apache.el.parser.AstValue.invoke(AstValue.java:247)
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.sql.SQLException: Io exception: Size Data Unit (SDU) mismatch
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:256)
oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:828)
oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1050)
oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:853)
oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1155)
oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3414)
oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3459)
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:80)
org.hibernate.loader.Loader.getResultSet(Loader.java:2065)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1862)
org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838)
org.hibernate.loader.Loader.doQuery(Loader.java:909)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
org.hibernate.loader.Loader.doList(Loader.java:2553)
org.hibernate.loader.Loader.doList(Loader.java:2539)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369)
org.hibernate.loader.Loader.list(Loader.java:2364)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387)
org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)
org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
com.pratikshinde.swe645.UserDAO.getId(UserDAO.java:18)
com.pratikshinde.swe645.StudentService.saveUser(StudentService.java:361)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:497)
org.apache.el.parser.AstValue.invoke(AstValue.java:247)
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
は親切に再びみんな手伝っ：
完全なスタックトレースがここにあるResultSetを抽出することができませんでした！ありがとう、トン！
Configuration configuration = new Configuration().configure();
へ：
Configuration configuration = new Configuration()
.addPackage("com.demo")
.addAnnotatedClass(User.class)
// add all other classes you want
.configure();
それは 'addPackage（ "com.demo"）' –