基于注解的spring3+hibernate3的springMVC框架

时间:2022-11-17 07:56:01

          上一篇给大家讲到spring3搭建的简单的springMVC的测试例子,没有数据层。这篇给大家介绍下spring3+Hibernate3搭建一个springMVC框架,并且有数据层。废话不多说,直接上代码了。以后会给大家搭建spring3。当然我是初学者,有什么问题还请多多见谅。

          当然首先不能忘记jar包,jar包在这也不多说。在最后会给源码下载地址。在源码包里都有,本人用的是oracle数据库,并且用的是Eclipse开发。如何用Eclipse搭建web工程,将在以后的文章中贴出。

          首先当然是要新建一个web工程,我的工程名就是叫spring3hibernate3。下图是我的工程的架构。


            基于注解的spring3+hibernate3的springMVC框架


               

              包文件的展开图如下:

              基于注解的spring3+hibernate3的springMVC框架


              

下面进入正题,导入jar包,接下来就是配置web.xml。代码如下:


<?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">
  	
  	<display-name>spring3hibernate3</display-name>
  	
  	<!-- 引入spring的配置文件 -->
  	<context-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath*:/applicationContext.xml</param-value>
  	</context-param>
  	
  	<!-- 引入spring -->
  	<listener>
  		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  	</listener>
  	
  	<!-- 配置编码过滤器 -->
  	<filter>
  		<filter-name>characterEncodingFilter</filter-name>
  		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  		<init-param>
  			<param-name>encoding</param-name>
  			<param-value>utf-8</param-value>
  		</init-param>
  		<init-param>
  			<param-name>forceEncoding</param-name>
  			<param-value>true</param-value>
  		</init-param>
  	</filter>
  	<filter-mapping>
  		<filter-name>characterEncodingFilter</filter-name>
  		<url-pattern>*.jsp</url-pattern>
  		<url-pattern>*.html</url-pattern>
  	</filter-mapping>
  	
  	<!-- 配置spring的分发器 -->
  	<servlet>
  		<servlet-name>springMVC</servlet-name>
  		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  		<!-- 引入自己命名的springMVC文件 -->
  		<init-param>
  			<param-name>contextConfigLocation</param-name>
  			<param-value>/WEB-INF/spring-mvc.xml</param-value>
  		</init-param>
  		<!-- 服务启动时就加载 -->
  		<load-on-startup>1</load-on-startup>
  	</servlet>
  	<servlet-mapping>
  		<servlet-name>springMVC</servlet-name>
  		<!-- 拦截所有以.do结尾的请求 -->
  		<url-pattern>*.do</url-pattern>
  	</servlet-mapping>
  	
  	<!-- 欢迎页 -->
  	<welcome-file-list>
  		<welcome-file>index.jsp</welcome-file>
  	</welcome-file-list>
  	
</web-app>


接下来spring-mvc.xml的配置:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:mvc="http://www.springframework.org/schema/mvc" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/context 
 		http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 		
	<bean 
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
	</bean>
	
 	<context:annotation-config/>
	
	<!-- 扫描注解包 -->
	<context:component-scan base-package="com.json.dao" />
	<context:component-scan base-package="com.json.service" />
	<context:component-scan base-package="com.json.controller" />
	
	<!-- 视图配置 -->
	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/page/" />
		<property name="suffix" value=".jsp" />
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
	</bean>
 		 		
</beans>

在classpath下面的META-INF/路径下面有application.properties,是数据库的相关配置,其实就是键值对,刚开始学的时候,我们是自己解析properties文件,其实apache已经帮我们做了。以下是文件的内容:

jdbc.url=jdbc:oracle:thin:@localhost:1521:XE
jdbc.username=scott
jdbc.password=tiger

配置applicationContext.xml:

<?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"
	xsi:schemaLocation="
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.0.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
		
		<!-- 引入配置properties文件 -->
		<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
			<property name="fileEncoding" value="UTF-8" />
			<property name="locations">
				<list>
					<value>classpath*:/META-INF/application.properties</value>
				</list>
			</property>
		</bean>
		
		<!-- 配置数据源dataSource -->
		<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
			<!-- 数据库的驱动, url, username, password -->
			<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
			<property name="url" value="${jdbc.url}" />
			<property name="username" value="${jdbc.username}" />
			<property name="password" value="${jdbc.password}" />
			<!-- 连接池启动时创建的连接数量 -->
			<property name="initialSize" value="5" />
			<!-- 同一时间最多的连接数量,0表示没有限制 -->
			<property name="maxActive" value="0" />
			<!-- 池中不会被释放的最多空闲的连接数,0表示没有显示 -->
			<property name="maxIdle" value="20"/>
			<!-- 在不新建连接的条件下,池中保持空闲的最少连接数 -->
			<property name="minIdle" value="1" />
		</bean>
		
		<!-- 配置SessionFactory -->
		<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
			<property name="dataSource" ref="dataSource"/>
			<property name="hibernateProperties">
				<props>
					<!-- oracle数据库的方言 -->
					<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
					<!-- 是否显示sql语句 -->
					<prop key="hibernate.show_sql">true</prop>
					<prop key="hibernate.jdbc.batch_size">80</prop>
					<prop key="hibernate.cacheQueries">true</prop>
					<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>  
					<prop key="hibernate.cache.use_query_cache">true</prop>  
				</props>
			</property>
			<!-- 扫描实体包。不知道为什么,com.json.model.* 这样配置会报错 -->
			<property name="packagesToScan" value="com.json.*" />  
		</bean>
		
		<!-- 配置事务管理器 -->
	    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
			<property name="sessionFactory" ref="sessionFactory" />
		</bean>
		
		<!-- Annotation管理事务器 -->
		<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
		
</beans>


到这里我们的配置文件就完成了。然后就是代码的编写了。既然牵扯到数据层,那么肯定会有表。当然这里也是简单实现数据的一个流通。所以我们就用简单的通用的用户表来测试。表名为fq_user,以下是数据库的表创建代码:

drop table fq_user;

create table fq_user(
       user_id number(5) primary key,
       user_name varchar2(50),
       user_age number(3)
);

insert into fq_user(user_id, user_name, user_age) values(1,'hehe',23);
commit;

select * from fq_user;

数据库建好之后,就要实现相应的实体映射,这里全程用注解的形式。以下是实体User的代码:

package com.json.model;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="fq_user")
public class User implements Serializable{
	
	private static final long serialVersionUID = -2051600566896335425L;

	@Id
	@Column(name="user_id")
	private Long id;
	
	@Column(name="user_name")
	private String name;
	
	@Column(name="user_age")
	private Long age;

	public User(){}
	
	public Long getId() {
		return id;
	}

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

	public String getName() {
		return name;
	}

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

	public Long getAge() {
		return age;
	}

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

	public String toString(){
		return org.apache.commons.lang.builder.ReflectionToStringBuilder.toString(this);
	}
}

由上面的代码我们可以得知数据库中一条数据,我们就演示从数据中拿到这条数据。接口层的代码就不贴了。就贴实现层的。下面是dao层的BaseDAO.java的代码:

package com.json.dao.impl;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class BaseDAO extends HibernateDaoSupport{
	
	@Autowired  
    public void setSessionFactoryOverride(SessionFactory sessionFactory)   
    {   
  
        super.setSessionFactory(sessionFactory);   
    }
}

UserDAOImpl.java的代码:

package com.json.dao.impl;

import org.springframework.stereotype.Repository;

import com.json.dao.UserDAO;
import com.json.model.User;

@Repository("userDao")
public class UserDAOImpl extends BaseDAO implements UserDAO{

	@Override
	public User get(long id) {
		return this.getHibernateTemplate().get(User.class, id);
	}

}

UserServiceImpl.java的代码:

package com.json.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.json.dao.UserDAO;
import com.json.model.User;
import com.json.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService{
	
	@Resource(name="userDao")
	private UserDAO userDao;

	@Override
	public User get(long id) {
		
		return userDao.get(id);
		
	}

}

UserController.java的代码:

package com.json.controller;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.json.model.User;
import com.json.service.UserService;

@Controller
public class UserController {
	
	@Resource(name="userService")
	private UserService userService;
	
	@RequestMapping("/get")
	public String get(){
		User u = userService.get(1);
		System.out.println(u);
		return "get";
	}
}

在/WEB-INF/page/下面有新建一个get.jsp。内容如下:

<%@ 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>get.jsp</title>
</head>
<body>
	I am get.jsp
</body>
</html>

好的,我们的测试所有的代码就完成了。下面启动数据库,启动服务器。在地址栏中输入:http://localhost:8290/spring3hibernate3/get.do,页面会跳转到get.jsp。

基于注解的spring3+hibernate3的springMVC框架


控制台的输出如下:


基于注解的spring3+hibernate3的springMVC框架


由以上可以看出,我们拿到了数据。

以下是源代码的下载地址:http://download.csdn.net/detail/fanshujuntuan/7547253