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在整合Spring+Hibernate时报该错误，sessionFactory配置如下：
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> ....... <!-- 自动扫描注解方式配置的hibernate类文件 --> <property name="packagesToScan"> //最后发现是该处的错误 <list> <value>sys.model</value> </list> </property>
....... </bean>
正如上面XML配置的那样，packageToScan是配置以注解方式配置Hibernate类，即如下这样的方式：
package sys.model;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "User")
public class UserInfo implements Serializable {
private static final long serialVersionUID = 8427996478439081619L;
// Fields
private String id;
private String name;
private String pwd;
private Date createdatetime;
private Date modifydatetime;
/** full constructor */
public UserInfo(String id, String name, String pwd, Date createdatetime, Date modifydatetime) {
this.id = id;
this.name = name;
this.pwd = pwd;
this.createdatetime = createdatetime;
this.modifydatetime = modifydatetime;
}
@Id
@Column(name = "ID", unique = true, nullable = false, length = 36)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
@Column(name = "NAME", unique = true, nullable = false, length = 100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "PWD", nullable = false, length = 32)
public String getPwd() {
return this.pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Temporal(TemporalType.TIMESTAMP)
// 如果这里是这种TemporalType.DATE，那么时间在数据库中存的时候会是"2015-07-16 00:00:00"这种形式，时分秒都为零
@Column(name = "CREATEDATETIME", length = 7)
public Date getCreatedatetime() {
return this.createdatetime;
}
public void setCreatedatetime(Date createdatetime) {
this.createdatetime = createdatetime;
}
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "MODIFYDATETIME", length = 7)
public Date getModifydatetime() {
return this.modifydatetime;
}
public void setModifydatetime(Date modifydatetime) {
this.modifydatetime = modifydatetime;
}
@Override
public String toString() {
return "[ID:" + id + " Name:" + name + " PassWord:" + pwd + " Createdatetime:" + createdatetime + " Modifydatetiem:" + modifydatetime + "]";
}
}
但是我整合式采用的*.hbm.xml的方式
这种方式最方便的方式是采用“mappingDirectoryLocations”
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> ....... <property name="mappingDirectoryLocations"> <list> <value>classpath:com/vrv/paw/domain</value> </list> </property>
</bean>
扩展：
mappingResources、mappingLocations、mappingDirectoryLocations
他们的区别：
1. mappingResources：指定classpath下具体映射文件名
<property name="mappingResources"> <value>petclinic.hbm.xml </value> </property>
2. mappingLocations：可以指定任何文件路径，并且可以指定前缀：classpath、file等
<property name="mappingLocations"> <value>/WEB-INF/petclinic.hbm.xml </value> </property>
<property name="mappingLocations"> <value>classpath:/com/company/domain/petclinic.hbm.xml </value> </property>
也可以用通配符指定，‘*‘指定一个文件(路径)名，‘**‘指定多个文件(路径)名，例如：
<property name="mappingLocations"> <value>classpath:/com/company/domainmaps/*.hbm.xml </value> </property>
上面的配置是在com/company/domain包下任何maps路径下的hbm.xml文件都被加载为映射文件
3. mappingDirectoryLocations：指定映射的文件路径
<property name="mappingDirectoryLocations"> <list> <value>WEB-INF/HibernateMappings</value> </list> </property>
也可以通过classpath来指出
<property name="mappingDirectoryLocations"> <list> <value>classpath:/XXX/package/</value> </list> </property>
总结:注解方式配置的hibernate类 与 *.hbm.xml 方式配置的类，在配置SessionFactory时配置方式是不同的，这是我以前没有注意的
no persistent classes found for query class: FROM com.vrv.paw.domain.User
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原文地址：http://www.cnblogs.com/liaojie970/p/5156949.html
