在上篇文章中，我们已经把struts2+hibernate3.2+spring2.0的开发环境搭建成功，这篇我们接着上篇，继续讲解struts2+hibernate3.2+spring2.0的整合过程。

   步骤二：在MySQL数据库中创建数据库、数据表，建表语句：

create database mytest;
use mytest;

CREATE TABLE users (
  id int(11) NOT NULL,
  firstname varchar(50) NOT NULL,
  lastname varchar(50) NOT NULL,
  age int(11) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

   步骤三：建立hibernate对数据表的持久层访问。

   在com.tgb.bean包中建立User.java和User.hbm.xml文件，用于建立和数据表users的映射。

   User.java

package com.tgb.bean;

public class User {
	private Integer id;
	private String firstname;
	private String lastname;
	private int age;

	public Integer getId() {
		return id;
	}

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

	public String getFirstname() {
		return firstname;
	}

	public void setFirstname(String firstname) {
		this.firstname = firstname;
	}

	public String getLastname() {
		return lastname;
	}

	public void setLastname(String lastname) {
		this.lastname = lastname;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
	<class name="com.tgb.bean.User" table="users">
		<id name="id" type="java.lang.Integer" column="id">
			<generator class="increment"></generator>
		</id>

		<property name="firstname" type="string" column="firstname"
			length="50"></property>
		<property name="lastname" type="string" column="lastname"
			length="50"></property>
		<property name="age" type="java.lang.Integer" column="age"></property>

	</class>
</hibernate-mapping>

   在com.tgb.dao中创建操作User对象的接口

   UserDAO.java

package com.tgb.dao;

import java.util.List;

import com.tgb.bean.User;

public interface UserDAO {

	public void saveUser(User user);

	public void removeUser(User user);

	public User findUserById(Integer id);

	public List<User> findAllUsers();

	public void updateUser(User user);
}

    UserDAOImpl.java

package com.tgb.dao.impl;

import java.util.List;

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

import com.tgb.bean.User;
import com.tgb.dao.UserDAO;

public class UserDAOImpl extends HibernateDaoSupport implements UserDAO {

	@SuppressWarnings("unchecked")
	public List<User> findAllUsers() {
		String hql = "from User user order by user.id desc";
		return (List<User>) this.getHibernateTemplate().find(hql);
	}

	public User findUserById(Integer id) {
		User user = (User) this.getHibernateTemplate().get(User.class, id);
		return user;
	}

	public void removeUser(User user) {
		this.getHibernateTemplate().delete(user);
	}

	public void saveUser(User user) {
		this.getHibernateTemplate().save(user);
	}

	public void updateUser(User user) {
		this.getHibernateTemplate().update(user);
	}

}

    在com.tgb.service中创建调用UserDAO的接口

    UserService.java

package com.tgb.service;

import java.util.List;

import com.tgb.bean.User;

public interface UserService {
	
	public List<User> findAll();
	
	public void save(User user);
	
	public void delete(User user);
	
	public User findUserById(Integer id);
	
	public void update(User user);
}

   UserServiceImpl.java

package com.tgb.service.impl;

import java.util.List;

import com.tgb.bean.User;
import com.tgb.dao.UserDAO;
import com.tgb.service.UserService;

public class UserServiceImpl implements UserService {

	private UserDAO userDao;

	public UserDAO getUserDao() {
		return userDao;
	}

	public void setUserDao(UserDAO userDao) {
		this.userDao = userDao;
	}

	public void delete(User user) {
		this.userDao.removeUser(user);
	}

	public List<User> findAll() {
		return this.userDao.findAllUsers();
	}

	public User findUserById(Integer id) {
		return this.findUserById(id);
	}

	public void save(User user) {
		this.userDao.saveUser(user);
	}

	public void update(User user) {
		this.userDao.updateUser(user);
	}

}

    SaveUserAction.java

package com.tgb.action.user;

import com.opensymphony.xwork2.ActionSupport;
import com.tgb.bean.User;
import com.tgb.service.UserService;

public class SaveUserAction extends ActionSupport {

	private User user;
	private UserService userService;

	public UserService getUserService() {
		return userService;
	}

	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	@Override
	public String execute() throws Exception {
		this.userService.save(this.user);

		return SUCCESS;
	}
}

package com.tgb.action.user;

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.tgb.service.UserService;

public class ListUserAction extends ActionSupport {
	private UserService userService;

	public UserService getUserService() {
		return userService;
	}

	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	@Override
	public String execute() throws Exception {
		Map request = (Map) ActionContext.getContext().get("request");
		request.put("list", userService.findAll());

		return SUCCESS;
	}
}

    save.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href=http://www.mamicode.com/"">>         list.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href=http://www.mamicode.com/"">>      到此，各层之间的接口和实现类已经创建完毕，下篇我们将讲解如何通过spring管理类之间的依赖关系。
struts2+hibernate3.2+spring2.0整合篇（二）