Hibernatetemplate and Hibernatedaosupport two methods to realize and delete good

spring+hibernate Two kinds of methods to realize and delete change and check

First, define a customer bean class and set the Customer.hbm.xml file. Again define a DAO interface. Prepare a jdbc.properties file.

The first method:

Define an object of the Hibernatetemplate class in the DAO class, using the object to invoke the Hibernatetemplate template encapsulation method, as follows: Java code/*** * Hibernatetemplate's transfer mode/publ IC class Customerdaoimpl implements Customerdao {//Set hibernatetemplate properties private Hibernatetemplate Hibernate Template;  The Set method must be set to public void Sethibernatetemplate (Hibernatetemplate hibernatetemplate) {This.hibernatetemplat e = hibernatetemplate;    }          //  Insert Method         @Override        public void insert (customer entity)  {            hibernatetemplate.save (entity);       }           //  Delete method (delete according to question)         @Override        public void delete (customer entity)  {           hibernatetemplate.delete (entity);          }          //  Delete method, deleted by ID, this method is unsuccessful         @Override        public void deletebyid (int  id)  {           // hibernateTemplate.    &NBSP;&NBSP;&NBsp; }          //  query all records        @ override       public list<customer> selectall ()  {            // todo auto-generated method stub            List<Customer> entities =  Hibernatetemplate.find ("From customer");            return entities;       }          //   Find records by ID         @Override        public  Customer selectbyid (int id)  {           //  TODO Auto-generated method stub            list<customer> entitise = hibernatetemplate                    .find ("from customer where id="  + id) ;           if  (Entitise.size ()  > 0)  {                Customer entity  = entitise.get (0);                return entity;           }            return null;       }          //  Update Methods         @Override         public void update (customer entity)  {            // todo auto-generated method stub            hibernatetemplate.update (Entity);       }     }   

Some of the code in the

XML is as follows:

Java code   <!--  decentralized configuration  -->       <context:property-placeholder  location= "Jdbc.properties"  />          <!--  C3P0 data source  -->       <bean id= "DataSource"  class= " Com.mchange.v2.c3p0.ComboPooledDataSource ">           < !--  driver  -->           <property name= " Driverclass ">               <value >${jdbc.driverClass}</value>           </property >              <!--  Connection URL address  -->            <property name= "Jdbcurl" >               <value>${jdbc.url}</value>            </property>               <!--  Connected user name  -->            <property name= "User" >                <value>${jdbc.user}</value>            </property>              <!--   Connection Password  -->           <property name= " Password ">               <value> ${jdbc.password}</value>           </property>     &nbsP         <!--  Max pool number  -->            <property name= "Maxpoolsize" >                <value>${c3p0.pool.max}</value>            </property>               <!--  Minimum pool number  -->            <property name= "Minpoolsize" >                <value>${c3p0.pool.min}</value>            </property>           <!--  Default initialized pool count  -->           <property name= " Initialpoolsize ">               <value>${c3p0.pool.init} </value>           </property>        </bean>             <bean id= " Sessionfactory "           class=" Org.springframework.orm.hibernate3.LocalSessionFactoryBean ">            <!--  Setting data sources  -->            <property name= "DataSource"  ref= "DataSource"  />            <!--  Property settings  -->            <property name= "Hibernateproperties" >                <props>                   < prop key= "Hibernate.show_sql" >${hibernate.show_sql}</prop>                    <prop key= " Hibernate.hbm2ddl.auto ">${hibernate.hbm2ddl.auto}</prop>                </props>            </property>           <!--  mapping file configuration  -- >           <property name= "Mappingresources" >                <list>                   <value> Cn/csdn/domain/customer.hbm.xml</value>               </list >           </property>          </bean>            <!--  Hibernate templates  -->       <bean id= "Hibernatetemplate"  class= " Org.springframework.orm.hibernate3.HibernateTemplate ">            <property name= "Sessionfactory"  ref= "Sessionfactory"  />        </bean>        <!-- dao Operations bean -->        <bean id= "Customerdaoimpl"  class= "Cn.csdn.dao.CustomerDaoImpl" >   <!--injection dependency template--><property name= "Hibernatetemplate" ref= "Hibernatetemplate"/></bean>

The second method:

The DAO implementation class inherits the Hibernatedaosupport class, which is an abstract class that has a hibernatetemplate property that passes through This.gethibernatetemplate () You can get an object for a Hibernatetemplate class.

The code in the DAO implementation class is as follows:

Java code  /**   *  Inheritance Hibernatedaosupport class, Hibernatedaosupport class encapsulates a hibernatetemplate variable    */   public class customerdaoimpl1 extends hibernatedaosupport  implements           CustomerDao {           //  Add records         @Override         public void insert (customer entity)  {            this.gethibernatetemplate (). Save (entity);       }           //  Delete records (delete by entity)        @ override       public void delete (customer entity)  {            // todo auto-generated method stub    &NBSP;&NBSP;&NBsp;     this.gethibernatetemplate (). Delete (entity);           }          //  Delete record (deleted by ID), unsuccessful         //        @Override        public  void deletebyid (int id)  {           //  TODO Auto-generated method stub            // this.gethibernatetemplate (). Delete (entity);       }          //  query all records         @Override        public list<customer> selectall ()  {            // TODO Auto-generated method stub        &nbsP;   list<customer> entities = this.gethibernatetemplate (). Find (                     "from  customer ");           return entities;       }     //   find records by ID        @ override       public customer selectbyid (int id)  {            // todo auto-generated method stub            list<customer> entities= This.gethibernatetemplate (). Find ("from customer where id=" +id);            if (Entities.size () >0) {                cuStomer entity=entities.get (0);                return entity;           }            return null;       }     //   Update method         @Override         public void update (customer entity)  {            // TODO Auto-generated method stub            this.gethibernatetemplate (). Update (entity);       }           }    

Part of the code in  xml:

Java code   <!--  decentralized configuration  -->       <context:property-placeholder  location= "Jdbc.properties"  />          <!--  C3P0 data source  -->       <bean id= "DataSource"  class= " Com.mchange.v2.c3p0.ComboPooledDataSource ">           < !--  driver  -->           <property name= " Driverclass ">               <value >${jdbc.driverClass}</value>           </property >              <!--  Connection URL address  -->            <property name= "Jdbcurl" >               <value>${jdbc.url}</value>            </property>               <!--  Connected user name  -->            <property name= "User" >                <value>${jdbc.user}</value>            </property>              <!--   Connection Password  -->           <property name= " Password ">               <value> ${jdbc.password}</value>           </property>     &nbsP         <!--  Max pool number  -->            <property&n