我是hibernate的新手，尝试使用hibernate注释将java类映射到表
我的pojo（Entity）类看起来像这样
package com.rasvek.smartpos.beans;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="studentdetails")
public class StudentLogin
{
public StudentLogin() {
}
public StudentLogin(String userName, String password, int id) {
//super();
this.userName = userName;
this.password = password;
this.id = id;
}
@Column(name="pwdl")
private String password;
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="studentId")
private int id;
@Column(name="userName")
private String userName;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "StudentLogin [userName=" + userName + ", password=" + password + ", id=" + id + "]";
}
}
我的表名是studentdetails
+-----------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+-------------+------+-----+---------+----------------+
| studentId | int(11) | NO | PRI | NULL | auto_increment |
| userName | varchar(45) | YES | | NULL | |
| pwdl | varchar(45) | YES | | NULL | |
+-----------+-------------+------+-----+---------+----------------+
我已经根据我的知识正确地映射了一切，但我仍然得到以下异常
org.hibernate.hql.ast.QuerySyntaxException: studentdetails is not mapped [from studentdetails where userName = :userName and pwdl= :pwdl]
at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:181)
at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:94)
at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:316)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3228)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3112)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:720)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:571)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:288)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:231)
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1651)
at com.rasvek.smartpos.hibernate.dao.impl.SpringFormLoginDAOImpl.authencateUser(SpringFormLoginDAOImpl.java:29)
at com.rasvek.smartpos.controller.SpringFormLoginController.authencateUser(SpringFormLoginController.java:27)
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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
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)
.cfg文件
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- JDBC Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/hb_student_tracker?useSSL=false</property>
<property name="connection.username">hbstudent</property>
<property name="connection.password">hbstudent</property>
<!-- JDBC connection pool settings ... using built-in test pool -->
<property name="connection.pool_size">1</property>
<!-- Select our SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Echo the SQL to stdout -->
<property name="show_sql">true</property>
<!-- Set the current session context -->
<property name="current_session_context_class">thread</property>
</session-factory>
</hibernate-configuration>
sessesion工厂
package com.rasvek.smartpos.hibernate.factory;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class SpringFormsSessionFactory
{
private static SessionFactory sessionFactory;
public static Configuration cfg;
static{
sessionFactory = new Configuration().configure("hibernateSpringForm.cfg.xml").buildSessionFactory();
}
/**
* @return the sessionFactory
*/
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
/**
* @param sessionFactory the sessionFactory to set
*/
public static void setSessionFactory(SessionFactory sessionFactory)
{
SpringFormsSessionFactory.sessionFactory = sessionFactory;
}
}
和实施
package com.rasvek.smartpos.hibernate.dao.impl;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.rasvek.smartpos.beans.StudentLogin;
import com.rasvek.smartpos.hibernate.dao.inter.SpringFormLoginDAOInter;
import com.rasvek.smartpos.hibernate.factory.SmartPOSSessionFactory;
import com.rasvek.smartpos.hibernate.factory.SpringFormsSessionFactory;
public class SpringFormLoginDAOImpl implements SpringFormLoginDAOInter
{
Session session=null;
public boolean authencateUser(String userName, String password)
{
session = SpringFormsSessionFactory.getSessionFactory().openSession();
boolean userStatus=false;
try {
if(userName !=null && password !=null)
{
System.out.println("before");
List<StudentLogin> list=session.createQuery("from studentdetails where userName = :userName and pwdl= :pwdl").setParameter(1, userName)
.setParameter(2, password).list();
if(!list.isEmpty())
{
userStatus=true;
}
System.out.println("after");
}
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if(session!=null)
session.close();
}
return userStatus;
}
}
请查看我的项目结构 please check it .cfg file location
请帮我解决这个问题。
答案 0 :(得分：0)
HQL使用Java类中定义的名称，而不是您定义的SQL表名。
因此，该表在您的HQL查询中称为StudentLogin而不是studentdetails，因此交换这些名称应该有效。
您的查询中pdwl也应该是password。
答案 1 :(得分：0)
from studentdetails where userName = :userName and pwdl= :pwdl
应修改为
from StudentLogin where userName = :userName and pwdl= :password
Hibernate mappers类名，而不是表名。
答案 2 :(得分：0)
实际上我的项目是spring MVC project。
1. 我没有在spring-servlet.xml文件中配置hibernate connection pool
2. 我没有设置Hibernate会话工厂
和hibernate关联我在文件中没有提到的配置。
需要在spring-servlet.xml文件中添加与hibernate相关的所有配置
