Hibernate replaces a mapping file with annotations

1. First delete the original mapping file and add annotations to the entity Class:

@Entity//declares that the current class is hibernate-mapped to an entity class in the database@Table (name= "news")//declaring the name of the table public classNews {@Id//declares this column as the primary key, as the identifier for the mapped object    /*** @GeneratedValue Annotations to define a build strategy * Generationtype.tables The value of the current primary key is saved separately into a table in a database * generationtype.sequence leverage the underlying     The database provides the sequence generation identifier * Generationtype.identity takes the Database's self-increment policy * Generationtype.auto automatically chooses the appropriate ID generation scheme based on different databases, MySQL is used here for incremental */@GeneratedValue (strategy=generationtype.auto)PrivateInteger id; @Column (name= "title", nullable=false)    PrivateString title; @Column (name= "content", nullable=false)    PrivateString content; @Column (name= "begintime", nullable=false)    PrivateDate begintime; @Column (name= "username", nullable=false)    PrivateString username;  publicNews () {Super(); }         publicInteger getId () {returnid; }     public voidsetId (Integer Id) { this. ID =id; }         publicString getTitle () {returntitle; }     public voidsettitle (String Title) { this. title =title; }         publicString getcontent () {returncontent; }     public voidsetcontent (String Content) { this. Content =content; }         publicDate getbegintime () {returnbegintime; }     public voidsetbegintime (Date Begintime) { this. BeginTime =begintime; }         publicString getusername () {returnusername; }     public voidsetusername (String Username) { this. Username =username; }        }

To find out how hibernate annotations are used, refer to my previous blog post

Http://www.cnblogs.com/qq1272850043/p/5960365.html

2. After adding the annotations, go to the Applicationcontext.xml file to delete the property that found the corresponding mapping File.

<!--Delete This. -< propertyname= "mappingresources">    <List>        <value>News/entity/news.hbm.xml</value>    </List></ property>

3. Then add this in the Applicationcontext.xml.

<!--scan entity class packages to resolve annotations for entity classes -< propertyname= "packagestoscan">    <List>        <!--This value adds the package containing the entity class -        <value>News.entity</value>    </List></ property>

Hibernate replaces a mapping file with annotations