初学S2SH搭建(二)

一、Srping 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



初学S2SH搭建(二)_第1张图片
 

生成的代码如下:Employee.java

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;

    }

}

Employee.hbm.xml

<?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>

同时我们需要将Employee.hbm.xml的路径放到applicationContext中。

<property name="mappingResources">

           <list>

              <value>cn/zhang/crm/model/pojo/Employee.hbm.xml</value>

           </list>

</property>

bDAO接口

实现CRUD方法,具体的EmployeeDao.java代码如下:

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);

}

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:

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);

       }

}

dservice(或businessManager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:

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);

}

实现这个接口EmployeeManagerImpl.java

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);

    }

}

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:

<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>

到此完成了SpringHibernate的整合。

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