Spring整合Hibernate之AnnotationSessionFactoryBean与LocalSessionFactoryBean

Spring集成Hibernate由两种形式

1、继续使用Hibernate的映射文件*.hbm.xml

2、使用jpa形式的pojo对象， 去掉*.hbm.xml文件

一、继续使用Hibernate的映射文件*.hbm.xml

此时Spring的配置文件中的SeesionFactory需要使用org.springframework.orm.hibernate.LocalSessionFactoryBean

	
	
		
			org.hibernate.dialect.SQLServerDialect
			true
			true
		
	

LocalSessionFactoryBean可以用如下几个属性来寻找*hbm.xml文件

mappingResources、mappingLocations、mappingDirectoryLocations与mappingJarLocations 

1、mappingResources：指定classpath下具体映射文件名 

	/**
	 * Set Hibernate mapping resources to be found in the class path,
	 * like "example.hbm.xml" or "mypackage/example.hbm.xml".
	 * Analogous to mapping entries in a Hibernate XML config file.
	 * Alternative to the more generic setMappingLocations method.
	 * 
Can be used to add to mappings from a Hibernate XML config file,
	 * or to specify all mappings locally.
	 * @see #setMappingLocations
	 * @see org.hibernate.cfg.Configuration#addResource
	 */
	public void setMappingResources(String... mappingResources) {
		this.mappingResources = mappingResources;
	}

src根目录下的example.hbm.xml文件

	example.hbm.xml 

src/mypackage目录下的example.hbm.xml文件

	mypackage/example.hbm.xml

2、mappingLocations，可以指定映射文件的路径，可以指定classpath路径下和其他文件夹下的映射文件

	/**
	 * Set locations of Hibernate mapping files, for example as classpath
	 * resource "classpath:example.hbm.xml". Supports any resource location
	 * via Spring's resource abstraction, for example relative paths like
	 * "WEB-INF/mappings/example.hbm.xml" when running in an application context.
	 * 
Can be used to add to mappings from a Hibernate XML config file,
	 * or to specify all mappings locally.
	 * @see org.hibernate.cfg.Configuration#addInputStream
	 */
	public void setMappingLocations(Resource... mappingLocations) {
		this.mappingLocations = mappingLocations;
	}

指定WEB-INF/mappings目录下的example.hbm.xml映射文件文件

	WEB-INF/mappings/example.hbm.xml 

指定classpath下的example.hbm.xml映射文件

	classpath:example.hbm.xml 

也可以使用*作为通配符

3、mappingDirectoryLocations，指定包含映射文件的文件夹的目录

	/**
	 * Set locations of directories that contain Hibernate mapping resources,
	 * like "WEB-INF/mappings".
	 * 
Can be used to add to mappings from a Hibernate XML config file,
	 * or to specify all mappings locally.
	 * @see org.hibernate.cfg.Configuration#addDirectory(java.io.File)
	 */
	public void setMappingDirectoryLocations(Resource... mappingDirectoryLocations) {
		this.mappingDirectoryLocations = mappingDirectoryLocations;
	}

包含WEB-INF/mappings目录下的所有*hbm.xml映射文件

	
		WEB-INF/mappings
	

也可以通过classpath来指出,此处包含classpath路径下的hbm包下的所有*.hbm.xml文件   

	
		classpath:hbm/
	

4、mappingJarLocations ，指定加载的映射文件在jar文件中 

	/**
	 * Set locations of jar files that contain Hibernate mapping resources,
	 * like "WEB-INF/lib/example.hbm.jar".
	 * 
Can be used to add to mappings from a Hibernate XML config file,
	 * or to specify all mappings locally.
	 * @see org.hibernate.cfg.Configuration#addJar(java.io.File)
	 */
	public void setMappingJarLocations(Resource... mappingJarLocations) {
		this.mappingJarLocations = mappingJarLocations;
	}

例如：

     WEB-INF/lib/example.hbm.jar

二、使用jpa形式的pojo对象， 去掉*.hbm.xml文件

此时Spring的配置文件中的SeesionFactory需要使用org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean

AnnotationSessionFactoryBean中查找jpa注解形式的pojo映射对象的属性有：annotatedClasses、packagesToScan

1、annotatedClasses：指定classpath下指定的注解映射实体类的类名

/**
 * Specify annotated classes, for which mappings will be read from
 * class-level annotation metadata.
 * @see org.hibernate.cfg.AnnotationConfiguration#addAnnotatedClass(Class)
 */
public void setAnnotatedClasses(Class... annotatedClasses) {
     this.annotatedClasses = annotatedClasses;
}

 

  com.anyview.entities.ClassTable com.anyview.entities.ClassStudentTable  

2、 packagesToScan指定映射文件的包名

        /**
	 * Specify packages to search using Spring-based scanning for entity classes in
	 * the classpath. This is an alternative to listing annotated classes explicitly.
	 * 
Default is none. Specify packages to search for autodetection of your entity
	 * classes in the classpath. This is analogous to Spring's component-scan feature
	 * ({@link org.springframework.context.annotation.ClassPathBeanDefinitionScanner}).
	 */
	public void setPackagesToScan(String... packagesToScan) {
		this.packagesToScan = packagesToScan;
	}