Spring 方式处理 Clob、Blob 大字段

1、在 applicationContext.xml 文件中增加如下配置：

< bean  id =  "nativeJdbcExtractor"  class = "org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor"  lazy-init =  "true" > bean  > < bean  id =  "lobHandler"  class = "org.springframework.jdbc.support.lob.OracleLobHandler"  lazy-init = "true"  >         < property  name = "nativeJdbcExtractor"  ref = "nativeJdbcExtractor"  /> bean >

2、在  sessionFactory 中增加如下红色字的配置：

< bean  id =  "sessionFactory"  class = "org.springframework.orm.hibernate3.LocalSessionFactoryBean"  >         < property  name = "dataSource"  ref = "dataSource"  />                 <property name="lobHandler" ref="lobHandler"/>         < property  name = "mappingResources"  >               < list >                     < value >  com/test/model/Announcement.hbm.xml  value >               list >         property >         < property  name = "hibernateProperties"  >               < props >                     < prop  key = "hibernate.dialect"  > $[hibernate.dialect]   prop >                     < prop  key = "hibernate.cache.provider_class"  > org.hibernate.cache.EhCacheProvider   prop >                     < prop  key = "hibernate.cache.use_query_cache"  > true   prop >                     < prop  key = "hibernate.show_sql"  > true   prop >                     < prop  key = "hibernate.bytecode.use_reflection_optimizer"  > true   prop >                     < prop  key = "hibernate.hbm2ddl.auto"  > $[hibernate.hbm2ddl.auto]   prop >               props >         property > bean >

3、Clob字段处理， *.hbm.xml 文件配置如下：

< property  name = "content"  type = "org.springframework.orm.hibernate3.support.ClobStringType"  >      < column  name = "CONTENT"  /> property >

4、对应的实体类中相关的字段用String 接受

5、Blob字段处理，*.hbm.xml 文件配置如下：

<  property   name  = "content"  type  = "org.springframework.orm.hibernate3.support.BlobByteArrayType"  >      < column  name =  "CONTENT"   />  property >

6、对应的实体类中相关的字段用 byte[] 数组接受