struts2+hibernate3.2+spring2.0整合篇（二）

        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;

         在此我们需要说明各层之间的调用关系，action层-->service层-->dao层，调用关系我们在spring中配置。

  步骤三：创建hibernate对数据表的持久层访问。

  在com.tgb.bean包中创建User.java和User.hbm.xml文件，建立User对象和数据表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;}}

   User.hbm.xml

<?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>

        步骤四：创建操作User对象的接口和实现类。

  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);}

          在com.tgb.dao.impl中创建操作User对象的接口实现类

  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);}}

   步骤五：创建service层的接口和实现类

  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);}

  在com.tgb.service.impl中创建调用UserDAO的接口实现类   

  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);}}

         步骤六：创建action层的对于SavaUser和ListUser的处理类。

  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;}@Overridepublic String execute() throws Exception {this.userService.save(this.user);return SUCCESS;}}

    ListUserAction.java

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;}@Overridepublic String execute() throws Exception {Map request = (Map) ActionContext.getContext().get("request");request.put("list", userService.findAll());return SUCCESS;}}

         步骤七：创建用于保存用户的save.jsp页面和显示用户的list.jsp页面。

  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="<%=basePath%>"><title>Save User</title></head><body><h1><font color="red">Operation List</font></h1><s:form action="saveUser"><s:textfield name="user.firstname" label="%{getText('firstname')}"></s:textfield><s:textfield name="user.lastname" label="%{getText('lastname')}"></s:textfield><s:textfield name="user.age" label="age"></s:textfield><s:submit></s:submit></s:form></body></html>

         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="<%=basePath%>"><title>List User</title></head><body><h1><font color="red"><center>Users List</center> </font></h1><table><tr><td>序号</td><td>姓</td><td>名</td><td>年龄</td><td>删除</td><td>更新</td></tr><s:iterator value="#request.list" id="us"><tr><td><s:property value="#us.id" /></td><td><s:property value="#us.firstname" /></td><td><s:property value="#us.lastname" /></td><td><s:property value="#us.age" /></td><td><s:a href="deleteUser.action?user.id=%{#us.id}">delete</s:a></td><td><s:a href="updatePUser.action?user.id=%{#us.id}">update</s:a></td></tr></s:iterator></table></body></html>

     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。