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

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RcwbxjgMgud4kzlJaglNyYdwwK2eUuRYZSEI5kpiWYdwwI2eX2P0M55wkl5h2DQna5MUMJGNnlxgwlYGSXGzOUgJFdbgQwKDcCFpQbAQvKjYAF5UbAgnIjYJFdbsxQAkZ2uaO3DiXmFXxDdrmLzVA6FLSuBFkoKLdvyC53sRlKlLsMkF3uYjOUKHcZILvcxWYoveT2XjiEbsWuLkntGWOUfiC73MVmKN3lFq866cxNcqtL0o0xRukPsstdbIbS48jNBbrccpNuMw1MmvmG7HL7kaEkhIijwS6rTrrsQbAjlHtByC53sRlKNtjIJrmEq07yuUnOV4xRlgDZ5S42Q0kIO93gf7uEO58UnGPOW26MUc4X2eXGDCVgZJcbM5SAkV1uzFACRna5EcCg3AhY/g+fwimj+8WqCQAAAABJRU5ErkJggg==" alt="" />

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

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