在使用jsf+Spring+Hibernate做项目时,发现配置Hibernate的实体映射文件相当繁琐.前段时间做EJB时,一直采用的是JPA的注解方式.相比较之下,少写不少代码.于是花了些时间.将项目中原来使用xml配置的方式转成使用Annotation方式.记录如下:

注:为了使用Annotation,需将原HibernateSessionFactory.xml中sessionFactory的实现类改成:org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean

             
             
                 
                      
       
        com.singtel.system.model.Customer
                   
              
     

注:原来使用mappingResources来配对hbm.xml文件,现用annotatedClasses来直接映射到指定Class.

Or:也可通过通配符来自动扫描类包

            
                  
       
        com.singtel.system.model.*
               
            
     

注:packagesToScan是Spring 2.5.6新特性(推荐)

接下来要做的就是在java实体中增加注解.

package com.singtel.system.model;import java.io.Serializable;import java.util.Date;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;import javax.persistence.Temporal;import javax.persistence.TemporalType;@Entity(name="Customer")@Table(name="CUSTOMER_LWC")public class Customer implements Serializable{    @Id    @Column(name="CUSTOMER_ID",columnDefinition = "Integer")    @GeneratedValue(strategy = GenerationType.AUTO)    public long customerId;        @Column(name="CUSTOMER_ADDRESS",columnDefinition = "varchar2(255)", nullable = false)    public String address;        @Column(name="CUSTOMER_PASSWORD",columnDefinition = "varchar2(45)", nullable = false)    public String password;        @Column(name = "CREATED_DATE", nullable = false)    @Temporal(TemporalType.TIMESTAMP)    public Date createdDate;        public long getCustomerId() {        return customerId;    }    public void setCustomerId(long customerId) {        this.customerId = customerId;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public Date getCreatedDate() {        return createdDate;    }    public void setCreatedDate(Date createdDate) {        this.createdDate = createdDate;    }    }

删除原有hbm.xml.Ok