我正在构建一个示例spring hibernate application.Spring部分工作正常。在hibernate中我已经映射了bean类和table.Still我得到一个错误，说bean类没有映射。请找到附加的代码以供参考。需要你的帮助解决这个问题。
Circle.java
package re.test;
import javax.persistence.Entity;
import javax.persistence.Id;
import org.hibernate.annotations.*;
import javax.persistence.Table;
@Entity
@Table(name = "EmployeeMaster1")
public class Circle {
@Id
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
HibernateDAOImpl.java
package re.test;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@Repository
public class HibernateDAOImpl {
@Autowired
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public SessionFactory getSessionFactory()
{
return sessionFactory;
}
public int getTableCount()
{
System.out.println("test");
String varSql = "from Circle";
Query query = getSessionFactory().openSession().createQuery(varSql);
return ((Long) query.uniqueResult()).intValue();
}
}
JDBCDemo.java
package re.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class JDBCDemo {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("Spring.xml");
HibernateDAOImpl dao = ctx.getBean("hibernateDaoImpl",HibernateDAOImpl.class);
int cnt = dao.getTableCount();
}
}
spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.directwebremoting.org/schema/spring-dwr
http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd">
<context:annotation-config />
<context:component-scan base-package = "re.test" />
<bean id="circle" class="re.test.Circle" autowire="byName">
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" autowire="byName">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=JAVADB"/>
<property name="username" value="sa"/>
<property name="password" value="dbadmin@234"/>
</bean>
<bean id="hibernateDaoImpl" class="re.test.HibernateDAOImpl"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="hibernateProperties">
<props>
<prop key="dialect">org.hibernate.dialect.SQLServerDialect</prop>
</props>
</property>
</bean>
</beans>
Following is the stack trace
Aug 08, 2016 4:53:10 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1077fc9: startup date [Mon Aug 08 16:53:10 IST 2016]; root of context hierarchy
Aug 08, 2016 4:53:10 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [Spring.xml]
Aug 08, 2016 4:53:11 PM org.springframework.jdbc.datasource.DriverManagerDataSource setDriverClassName
INFO: Loaded JDBC driver: com.microsoft.sqlserver.jdbc.SQLServerDriver
Aug 08, 2016 4:53:12 PM org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.3.Final}
Aug 08, 2016 4:53:12 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.3.11.Final}
Aug 08, 2016 4:53:12 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Aug 08, 2016 4:53:12 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Aug 08, 2016 4:53:12 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.SQLServer2008Dialect
Aug 08, 2016 4:53:12 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
Aug 08, 2016 4:53:12 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
test
**Exception in thread "main" org.hibernate.hql.internal.ast.QuerySyntaxException: Circle is not mapped [from Circle]
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)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:131)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:93)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1836)
at re.test.HibernateDAOImpl.getTableCount(HibernateDAOImpl.java:26)
at re.test.JDBCDemo.main(JDBCDemo.java:14)
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: Circle 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:338)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3678)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3567)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:708)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:564)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:249)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:278)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206)
... 9 more**
答案 0 :(得分：1)
Spring是这个错误，因为你的bean没有在spring.xml中注册。当您使用基于xml的配置时，请检查spring类。它应该类似于：
<beans:bean id="hibernate4AnnotatedSessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="annotatedClasses">
<beans:list>
<beans:value>com.mypackage.model.Person</beans:value>
</beans:list>
</beans:property>
<beans:property name="hibernateProperties">
<beans:props>
<beans:prop key="hibernate.dialect">
org. hibernate.dialect. MySQLDialect
</beans:prop>
<beans:prop key="hibernate.show_sql">true</beans:prop>
</beans:props>
</beans:property>
</beans:bean>