Spring3+Hibernate+Struts2整合之注解整合

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软件要求：jdk7+eclipse+tomcat+PostgreSQL
SSH 环境配置：
一：配置hibernate
1）定义hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration>    <session-factory>    <!-- 1 基本4项 -->        <property name="connection.driver_class">            org.postgresql.Driver        </property>        <property name="connection.url">            jdbc:postgresql://localhost:5432/chapter17            </property>        <property name="connection.username">postgres</property>        <property name="connection.password">123456</property>        <!-- 2 方言 -->        <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>        <!-- 3 sql -->        <property name="show_sql">true</property>        <property name="format_sql">true</property>        <property name="hbm2ddl.auto">update</property>        <!-- 4 取消bean校验 -->        <property name="javax.persistence.validation.mode">none</property>        <!-- 5整合c3p0 -->        <property name="hibernate.connection.provider_class">            org.hibernate.connection.C3P0ConnectionProvider            </property>         <!-- 使用注解方式 -->        <mapping class="cn.itcast.domain.User"/>            </session-factory></hibernate-configuration>

二：配置spring管理hibernate。
配置applicationContext.xml文件（注:xml 文件可以相互引用）
主要ApplicationContext代码

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"    xsi:schemaLocation="http://www.springframework.org/schema/beans                         http://www.springframework.org/schema/beans/spring-beans.xsd                 http://www.springframework.org/schema/context                                http://www.springframework.org/schema/context/spring-context.xsd                 http://www.springframework.org/schema/tx                  http://www.springframework.org/schema/tx/spring-tx.xsd                 http://www.springframework.org/schema/aop                  http://www.springframework.org/schema/aop/spring-aop.xsd"><!--  使用hibernate.cfg.xml                 --><!--   <import resource="applicationContext1.xml"/> --><!-- 不使用hibernate.cfg.xml --><!--   <import resource="applicationContext2.xml"/> --><!--   使用注解方式 -->  <import resource="applicationContext3.xml"/></beans>

另外注解方式对应的的ApplicationContext3 配置

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"        "http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <!-- 开发模式 -->    <constant name="struts.devMode" value="true"></constant>    <!-- 开发模式 -->    <constant name="struts.devMode" value="true"></constant>    <package name="ssh" namespace="/" extends="struts-default">        <!-- action的创建交予Sping -->        <action name="userAction_*" class="userAction" method="{1}">            <result name="add">/success.jsp</result>        </action>    </package></struts>

我们先进行后台数据库插入操作。

一：实体和表对应
基本思路，通过给Entity注解，并且设置Table属性，可以将表和Entity一一对应。
@entity，在类之前加上这个表示这个是是对应表的实体类
@Table（name=“t_user”）

package cn.itcast.domain;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name="t_user")public class User1 {    @Id（表示ID）    @GeneratedValue(strategy=GenerationType.AUTO)（主键生成策略）    private Integer id;    @Column(name="username", length=50)（对应表中的列）    private String username;    private String password;（不写的话，表示默认，如果字符完全一样，那就可以不写）    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }}

上面的注解后，作用相当于配置User.hbm.xml 文件了。

二：注解dao层
增加@Respository
代码如下
接口层定义方法

package cn.itcast.dao;import java.util.List;import cn.itcast.domain.User;public interface UserDao {    public void saveUser(User user);    public void updateUser(User user);    public void deleteUser(User user);    public User findById(Integer id);    public List<User> findAllUser();}

定义类方法实现

package cn.itcast.dao.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.orm.hibernate3.HibernateTemplate;import org.springframework.stereotype.Repository;import cn.itcast.dao.UserDao;import cn.itcast.domain.User;@Repositorypublic class UserDaoImpl implements UserDao {    @Autowired    private HibernateTemplate hibernateTemplate;    @Override    public void saveUser(User user) {        // TODO Auto-generated method stub        this.hibernateTemplate.save(user);    }    @Override    public void updateUser(User user) {        // TODO Auto-generated method stub        this.hibernateTemplate.update(user);    }    @Override    public void deleteUser(User user) {        // TODO Auto-generated method stub        this.hibernateTemplate.delete(user);    }    @Override    public User findById(Integer id) {        // TODO Auto-generated method stub        return this.hibernateTemplate.get(User.class, id);    }    @Override    public List<User> findAllUser() {        // TODO Auto-generated method stub        return this.hibernateTemplate.find("from User");    }}

三：注解Service 层
接口方法定义代码：

package cn.itcast.service;import java.util.List;import cn.itcast.domain.User;public interface UserService {    public void saveUser(User user);    public void updateUser(User user);    public void deleteUser(User user);    public User findById(Integer id);    public List<User> findAllUser();}

实现代码

package cn.itcast.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import cn.itcast.dao.UserDao;import cn.itcast.domain.User;import cn.itcast.service.UserService;@Servicepublic class UserServiceImpl implements UserService {    @Autowired     private UserDao userDao;    @Transactional    @Override    public void saveUser(User user) {        // TODO Auto-generated method stub        this.userDao.saveUser(user);    }    @Transactional    @Override    public void updateUser(User user) {        // TODO Auto-generated method stub        this.userDao.updateUser(user);    }    @Transactional    @Override    public void deleteUser(User user) {        // TODO Auto-generated method stub        this.userDao.deleteUser(user);    }    @Transactional(readOnly=true)    @Override    public User findById(Integer id) {        // TODO Auto-generated method stub        return this.userDao.findById(id);    }    @Transactional(readOnly=true)    @Override    public List<User> findAllUser() {        // TODO Auto-generated method stub        return this.userDao.findAllUser();    }}

四：注解Action层
代码如下

package cn.itcast.action;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.Namespace;import org.apache.struts2.convention.annotation.ParentPackage;import org.apache.struts2.convention.annotation.Result;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import cn.itcast.domain.User;import cn.itcast.service.UserService;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;@Namespace("/")@ParentPackage("struts-default")@Controllerpublic class UserAction extends ActionSupport implements ModelDriven<User>{    /**     *      */    private static final long serialVersionUID = 1L;    private User user = new User();    public User getModel() {        return this.user;    }    // *****************************    @Autowired    private UserService userService;    @Action(value = "userAction_add", results = { @Result(name = "add", location = "/success.jsp") })    public String add() {        this.userService.saveUser(user);        return "add";    }}

测试类定义：

package cn.itcast.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import cn.itcast.domain.User;import cn.itcast.service.UserService;public class AppTest {    @Test     public void demo()     {        User user = new User();        user.setUsername("cherry");        user.setPassword("12345678");        String xmlPath = "applicationContext.xml";        ApplicationContext applicationContext = new ClassPathXmlApplicationContext(                xmlPath);        UserService userService = applicationContext.getBean("userService",                UserService.class);        userService.saveUser(user);     }}

结果如下：
这里写图片描述

现在：链接前端和spring了

web.xml配置

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee         http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"    id="WebApp_ID" version="3.0">    <!-- 监听器 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!--配置Struts2核心控制器 -->    <filter>        <filter-name>struts2</filter-name>        <filter-class>            org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

设置好web 容器后，设置struts 相应的action

struts代码

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"        "http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <!-- 开发模式 -->    <constant name="struts.devMode" value="true"></constant>    <!-- 开发模式 -->    <constant name="struts.devMode" value="true"></constant>    <package name="ssh" namespace="/" extends="struts-default">        <!-- action的创建交予Sping -->        <action name="userAction_*" class="userAction" method="{1}">            <result name="add">/success.jsp</result>        </action>    </package></struts>

这时，配置好了前端和后端的动作了，可以直接写好前端，写好前端的action，就可以进行插入操作了
index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!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>添加用户</title></head><body>    <form action="${pageContext.request.contextPath}/userAction_add"        method="post">        用户名：<input type="text" name="username" /> <br/>         密&nbsp&nbsp&nbsp码：<input type="password" name="password" /> <br/>         <input type="submit" value="添加" />    </form></body></html>

插入成功页面

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!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>成功页面</title></head><body><p>insert successfully</p></body></html>

在服务器上运行项目，输入地址
http://localhost:8080/AnnotationCom/index.jsp
这里写图片描述

插入成功的话会出现下面的页面

这里写图片描述
数据库如下：

代码下载：地址
http://download.csdn.net/detail/u010714901/9680878

总结：对于SSH 整合来说，Spring 才是最重要的那个，因为他是管理者，管理Bean的创建，管理后台中所有的东西。在spring采用注解Annotation来管理的时候，struts.xml 文件需要改action中class属性的值，变成在spring中定义的类的id。
Spring是struts和hibernate的中转站。

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