基于Annotation的Strust2,Spring,Hibernate的整合，利用Struts2 convention插件

在这里，我主要讲解怎么利用Struts2 convention插件的加入后怎么处理和spring的整合。
首先创建实体类，Customer

@Entity
public class Customer implements Serializable {
	private static final long serialVersionUID = 6961371108792430359L;
	
	private Integer id;
	private String name;
	private String address;
	private Date createDate;
	
	public Customer() {
		
	}

	public Customer(String name, String address, Date createDate) {
		this.name = name;
		this.address = address;
		this.createDate = createDate;
	}

	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	@Column(name="name",length=45,nullable=false)
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	@Temporal(TemporalType.TIMESTAMP)
	@Column(name="create_date")
	public Date getCreateDate() {
		return createDate;
	}

	public void setCreateDate(Date createDate) {
		this.createDate = createDate;
	}
	

}

在配置sping sessionFactory bean的时候，sessionFactory的实现类应该为AnnotationSessionFactoryBean，然后再配置一下要spiring扫描的实体类的所在包
<property name="packagesToScan">
<list>
       <value>org.clong.domain</value>
</list>
</property>
第二步，完成对dao的设计：

package org.clong.dao;

import java.util.List;

import org.clong.domain.Customer;

public interface CustomerDao {
	
	public void save(Customer customer);
	
	public List<Customer> findAllCustomers();
	
}

dao实现类如下：

package org.clong.dao.impl;

import java.util.List;

import org.clong.dao.CustomerDao;
import org.clong.dao.SuperDaoSupport;
import org.clong.domain.Customer;
import org.springframework.stereotype.Repository;

@Repository("customerDao")
public class CustomerDaoImpl extends SuperDaoSupport implements CustomerDao {
	

	@SuppressWarnings("unchecked")
	@Override
	public List<Customer> findAllCustomers() {
		return getHibernateTemplate().find("from Customer");
	}

	@Override
	public void save(Customer customer) {
		getHibernateTemplate().save(customer);
	}

}

在这里我是利用了spring提供的HibernateDaoSupport这个来实现sessionFactory的注入，由于不想在每个dao中都设置sessionFactory的注入，所以写了一个父类用来被子类继承，在父类中注入sessionFactory。由于HibernateDaoSupport的setSessionFactory(SessionFactory sessionFactory)z方法是final类型的，所以子类不能覆盖，而且又不是使用配置文件，所以写了一个辅助类，

import javax.annotation.Resource;

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;


public class SuperDaoSupport extends HibernateDaoSupport {
	private SessionFactory sessionFactory;

	@Resource(name="sessionFactory")
	public void setSuperSessionFactory(SessionFactory sessionFactory) {
		super.setSessionFactory(sessionFactory);
	}
	
}

第三步，设计服务层

import java.util.List;

import org.clong.domain.Customer;

public interface CustomerBo {
	void addCustomer(Customer customer);
	List<Customer> listCustomer();

}

实现类为：

import java.util.List;

import javax.annotation.Resource;

import org.clong.bo.CustomerBo;
import org.clong.dao.CustomerDao;
import org.clong.domain.Customer;
import org.springframework.stereotype.Service;

@Service("customerBo")
public class CustomerBoImpl implements CustomerBo {
	private CustomerDao customerDao;
	
	@Resource
	public void setCustomerDao(CustomerDao customerDao) {
		this.customerDao = customerDao;
	}

	@Override
	public void addCustomer(Customer customer) {
		customerDao.save(customer);

	}

	@Override
	public List<Customer> listCustomer() {
		return customerDao.findAllCustomers();
	}

}

第四步，设计action

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.annotation.Resource;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.clong.bo.CustomerBo;
import org.clong.domain.Customer;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;


public class CustomerAction extends ActionSupport implements ModelDriven<Customer>,Preparable {
	private static final long serialVersionUID = -4411234960652825984L;

	private Customer customer;
	private List<Customer> customerList=new ArrayList<Customer>();
	private CustomerBo customerBo;
	
	public Customer getCustomer() {
		return customer;
	}


	public List<Customer> getCustomerList() {
		return customerList;
	}

	@Resource
	public void setCustomerBo(CustomerBo customerBo) {
		this.customerBo = customerBo;
	}


	@Override
	public Customer getModel() {
		if(customer==null){
			customer=new Customer();
		}
		return customer;
	}
	
	
	@Action(value="addCustomer",
			results={
				@Result(name="success",type="redirectAction",params={"actionName","listCustomer","namespace","/customer"}),
				@Result(name="input",location="customer.jsp")
				})
	public String addCustomer() throws Exception{
		//save it
		customer.setCreateDate(new Date());
		customerBo.addCustomer(customer);
 
		//reload the customer list
//		customerList = null;
		customerList = customerBo.listCustomer();
 
		return "success";
 
	}
 
	
	@Action(value="listCustomer",results={@Result(name="success",location="customer.jsp")})
	public String listCustomer() throws Exception{
 
		return "success";
 
	}
	
	@Override
	public void prepare() throws Exception {
		customerList = customerBo.listCustomer();
		
	}

}

在这里，利用struts2提供的验证框架，简单的进行一下服务端验证
我们对CustomerAction这个类中的addCustomer这个action进行验证（验证文件名需要满足一定的规则,具体请参见Struts2官方文档中的内容），我们这里的验证文件名为CustomerAction-addCustomer-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
  		"-//OpenSymphony Group//XWork Validator 1.0.3//EN"
  		"http://www.opensymphony.com/xwork/xwork-validator-1.0.3.dtd">
  		
<validators>
	<field name="name">
		<field-validator type="requiredstring">
			<message>name cann't be empty</message>
		</field-validator>
	</field>
</validators>  

注意这里action并不需要像没用convention插件那样加上类级别的@Controller注解
最后来个页面展示一下customer.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>Add Customer</h2>
<s:form action="addCustomer" namespace="/customer">
  <s:textfield name="name" label="Name" value="" />
  <s:textarea name="address" label="Address" value="" cols="50" rows="5" />
  <s:submit />
</s:form>

<h2>All Customers</h2>

<s:if test="customerList.size() > 0">
<table border="1px" cellpadding="8px">
	<tr>
		<th>Customer Id</th>
		<th>Name</th>
		<th>Address</th>
		<th>Created Date</th>
	</tr>
	<s:iterator value="customerList" status="userStatus">
		<tr>
			<td><s:property value="id" /></td>
			<td><s:property value="name" /></td>
			<td><s:property value="address" /></td>
			<td><s:date name="createDate" format="yyyy-MM-dd" /></td>
		</tr>
	</s:iterator>
</table>
</s:if>
<br/>
<br/>
</body>
</html>

最后提供一下完整的源代码供下载(Struts2 2.2.1，Spring2.5.6，Hibernate3.6.0的jar包没有提供)