一、Srping 与 Hibnernate 的整合
（4）开发
这里采用自底向上的开发模式。
（a）底层的开发
打开DB Explorer，连接上数据库，找到我们所需要的表，然后点击右键选择【Hibernate reverse Engineering】
Id Generator选择native，如果是Oracle可以选择increment
生成的代码如下：Employee.java
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package cn.zhang.crm.model.pojo;
/**
*Employeeentity.@authorMyEclipsePersistenceTools
*/
publicclass Employee implements java.io.Serializable {
privatestaticfinallongserialVersionUID = 4740966089797222237L;
private Integer id;
private String name;
private String address;
private String phone;
// Constructors
/**defaultconstructor*/
public Employee() {
}
/**fullconstructor*/
public Employee(String name, String address, String phone) {
this.name = name;
this.address = address;
this.phone = phone;
}
// Property accessors
public Integer getId() {
returnthis.id;
}
publicvoid setId(Integer id) {
this.id = id;
}
public String getName() {
returnthis.name;
}
publicvoid setName(String name) {
this.name = name;
}
public String getAddress() {
returnthis.address;
}
publicvoid setAddress(String address) {
this.address = address;
}
public String getPhone() {
returnthis.phone;
}
publicvoid setPhone(String phone) {
this.phone = phone;
}
}
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Employee.hbm.xml
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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="cn.zhang.crm.model.pojo.Employee" table="employee" catalog="test">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="native"></generator>
</id>
<property name="name" type="java.lang.String">
<column name="name" />
</property>
<property name="address" type="java.lang.String">
<column name="address" />
</property>
<property name="phone" type="java.lang.String">
<column name="phone" />
</property>
</class>
</hibernate-mapping>
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同时我们需要将Employee.hbm.xml的路径放到applicationContext中。
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<property name="mappingResources">
<list>
<value>cn/zhang/crm/model/pojo/Employee.hbm.xml</value>
</list>
</property>
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（b）DAO接口
实现CRUD方法，具体的EmployeeDao.java代码如下：
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package cn.zhang.crm.dao;
import java.util.List;
import cn.zhang.crm.model.pojo.Employee;
publicinterface EmployeeDao {
publicvoid add(Employee e);
public Employee getEmployee(int id);
public List getEmployees();
publicvoid update(Employee e);
publicvoid delete(int id);
}
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（c）实现DAO接口方法
实现EmployeeDao接口方法，同时要继承HibernateDaoSupport类，EmployeeDaoImpl.java的具体代码如下：
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package cn.zhang.crm.dao.hibernate;
import java.util.List;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import cn.zhang.crm.dao.EmployeeDao;
import cn.zhang.crm.model.pojo.Employee;
public class EmployeeDaoImpl extends HibernateDaoSupport implements EmployeeDao {
public void add(Employee e) {
getHibernateTemplate().save(e);
}
public void delete(int id) {
getHibernateTemplate().delete(getEmployee(id));
}
public Employee getEmployee(int id) {
return (Employee)getHibernateTemplate().get(Employee.class, id);
}
public List getEmployees() {
//这里一定要写Employee，千万不要误写成employee，因为Hibernate是从对象中读取数据的
return getHibernateTemplate().find("from Employee");
}
public void update(Employee e) {
getHibernateTemplate().update(e);
}
}
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（d）service（或business）Manager服务层，主要是事务处理，利用的是代码生成技术（具体作用是什么现在还不是很清楚，在今后的学习中再好好的体会）
EmployeeManager.java（它是一个接口）代码如下：
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package cn.zhang.crm.service;
import java.util.List;
import cn.zhang.crm.model.pojo.Employee;
publicinterface EmployeeManager {
publicvoid addEmployee(Employee e);
public Employee getEmployee(int id);
public List listEmployee();
publicvoid updateEmployee(Employee e);
publicvoid deleteEmployee(int id);
}
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实现这个接口EmployeeManagerImpl.java：
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package cn.zhang.crm.service.impl;
import java.util.List;
import cn.zhang.crm.dao.EmployeeDao;
import cn.zhang.crm.model.pojo.Employee;
import cn.zhang.crm.service.EmployeeManager;
publicclass EmployeeManagerImpl implements EmployeeManager {
private EmployeeDao employeeDao;
publicvoid setEmployeeDao(EmployeeDao employeeDao) {
this.employeeDao = employeeDao;
}
publicvoid addEmployee(Employee e) {
employeeDao.add(e);
}
publicvoid deleteEmployee(int id) {
employeeDao.delete(id);
}
public Employee getEmployee(int id) {
returnemployeeDao.getEmployee(id);
}
public List listEmployee() {
returnemployeeDao.getEmployees();
}
publicvoid updateEmployee(Employee e) {
employeeDao.update(e);
}
}
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上述完成后，我们就需要在spring中注册类了。打开applicationContext.xml，然后注册<bean>
增加的代码如下：
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<bean id="employeeDao"
class="cn.zhang.crm.dao.hibernate.EmployeeDaoHibernate">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="employeeManager"
class="cn.zhang.crm.service.impl.EmployeeManagerImpl">
<property name="employeeDao">
<ref bean="employeeDao" />
</property>
</bean>
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到此完成了Spring和Hibernate的整合。