[置顶] 基于spring3.0的采用XML配置的spring MVC项目

Spring MVC 框架

Spring 框架提供了构建 Web 应用程序的全功能 MVC 模块。使用 Spring 可插入的 MVC 架构,可以选择是使用内置的 Spring Web 框架还可以是 Struts 这样的 Web 框架。通过策略接口,Spring 框架是高度可配置的,而且包含多种视图技术,例如 JavaServer Pages(JSP)技术、Velocity、Tiles、iText 和 POI。Spring MVC 框架并不知道使用的视图,所以不会强迫您只使用 JSP 技术。Spring MVC 分离了控制器、模型对象、分派器以及处理程序对象的角色,这种分离让它们更容易进行定制。

常见MVC框架比较

运行性能上:

         Jsp+servlet>struts1>spring mvc>struts2+freemarker>>struts2,ognl,值栈。

开发效率上,基本正好相反。值得强调的是,spring mvc开发效率和struts2不相上下。

 Struts2的性能低的原因是因为OGNL和值栈造成的。所以,如果你的系统并发量高,可以使用freemaker进行显示,而不是采用OGNL和值栈。这样,在性能上会有相当大得提高。

基于spring3.0的采用XML配置的spring MVC项目

注:本项目全部基于XML配置。同时,集成了hibernate。采用的是:spring MVC+hibernate+spring的开发架构

1.  建立web项目

2.  导入jar(spring.jar, spring-webmvc.jar, commons-logging.jar。其他jar包为hibernate相关jar)

3. 修改web.xml如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">>
	<servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/hib-config.xml,/WEB-INF/web-config.xml,/WEB-INF/service-config.xml,/WEB-INF/dao-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>


4、 增加web-config.xml(这里包含spring mvc相关的相关配置)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	
	<!-- Controller方法调用规则定义 -->
    <bean id="paraMethodResolver"
        class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
        <property name="paramName" value="action"/>
        <property name="defaultMethodName" value="list"/>
    </bean>
  
   <!-- 页面View层基本信息设定 -->
    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView"/>
        <!--<property name="prefix" value="/myjsp/"/>-->
        <property name="suffix" value=".jsp"/>
    </bean>

<!-- servlet映射列表,所有控制层Controller的servlet在这里定义 -->
    <bean id="urlMapping"
          class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="user.do">userController</prop>
            </props>
        </property>
    </bean>

<bean id="userController" class="com.sxt.action.UserController">
	<property name="userService" ref="userService"></property>
</bean>
</beans>


5、在WEB-INF下增加service-config.xml(这里包含service层类的相关配置)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

	<bean id="userService" class="com.sxt.service.UserService">
		<property name="userDao" ref="userDao"></property>
	</bean>
	
</beans>


6、在WEB-INF下增加hib-config.xml(这里包含spring集成hibernate相关的配置)

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
  http://www.springframework.org/schema/context   
   http://www.springframework.org/schema/context/spring-context-2.5.xsd
">
	<context:component-scan  base-package="com.sxt"/>   
	<!-- 支持aop注解 -->
	<aop:aspectj-autoproxy />
	
		
	<bean id="dataSource"  
            class="org.apache.commons.dbcp.BasicDataSource">  
            <property name="driverClassName"  
                value="com.mysql.jdbc.Driver">  
            </property>  
            <property name="url" value="jdbc:mysql://localhost:3306/myhib"></property>  
            <property name="username" value="root"></property>  
            <property name="password" value="123456"></property>
    </bean>  

   <bean id="sessionFactory"  
       class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">  
           <property name="dataSource">  
               <ref bean="dataSource" />  
           </property>
           <property name="hibernateProperties">  
               <props>  
               	<!-- key的名字前面都要加hibernate. -->
                   <prop key="hibernate.dialect">  
                       org.hibernate.dialect.MySQLDialect  
                   </prop>  
                   <prop key="hibernate.show_sql">true</prop>
                   <prop key="hibernate.hbm2ddl.auto">update</prop>
               </props>
           </property>
		<property name="packagesToScan">
			<value>com.sxt.po</value>
		</property>
   </bean>  

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate" >
	<property name="sessionFactory" ref="sessionFactory"></property>
</bean>

<!--配置一个JdbcTemplate实例-->  
<bean id="jdbcTemplate"  class="org.springframework.jdbc.core.JdbcTemplate">   
     <property name="dataSource" ref="dataSource"/>   
</bean>  


<!-- 配置事务管理 -->
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" >
	<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:annotation-driven transaction-manager="txManager" />
<aop:config> 
	<aop:pointcut expression="execution(public * com.sxt.service.impl.*.*(..))" id="businessService"/> 
	<aop:advisor advice-ref="txAdvice" pointcut-ref="businessService" /> 
</aop:config> 
<tx:advice id="txAdvice" transaction-manager="txManager" > 
	<tx:attributes> 
		<tx:method name="find*"  read-only="true" propagation="NOT_SUPPORTED"  /> 
		<!-- get开头的方法不需要在事务中运行 。 
		有些情况是没有必要使用事务的,比如获取数据。开启事务本身对性能是有一定的影响的--> 
		<tx:method name="*"/>    <!-- 其他方法在实务中运行 --> 
	</tx:attributes> 
</tx:advice> 

</beans>


7、在WEB-INF下增加dao-config.xml(这里包含dao层类的相关配置)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	
	<bean id="userDao" class="com.sxt.dao.UserDao">
	  <property name="hibernateTemplate" ref="hibernateTemplate"></property>
	</bean>
</beans>


8、javaBean类

package com.sxt.po;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {
	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	private int id;
	private String uname;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUname() {
		return uname;
	}
	public void setUname(String uname) {
		this.uname = uname;
	}
}


9、dao类

package com.sxt.dao;

import org.springframework.orm.hibernate3.HibernateTemplate;

import com.sxt.po.User;

public class UserDao {
	private HibernateTemplate hibernateTemplate;
	
	public void add(User u){
		System.out.println("UserDao.add()");
		hibernateTemplate.save(u);
	}

	public HibernateTemplate getHibernateTemplate() {
		return hibernateTemplate;
	}

	public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
		this.hibernateTemplate = hibernateTemplate;
	}
	
}


10、service类

package com.sxt.service;

import com.sxt.dao.UserDao;
import com.sxt.po.User;

public class UserService {
	
	private UserDao userDao;
	
	public void add(String uname){
		System.out.println("UserService.add()");
		User u = new User();
		u.setUname(uname);
		userDao.add(u);
	}

	public UserDao getUserDao() {
		return userDao;
	}

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


11、control类

package com.sxt.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import com.sxt.service.UserService;

public class UserController implements Controller {

	private UserService userService;
	
	@Override
	public ModelAndView handleRequest(HttpServletRequest req,
			HttpServletResponse resp) throws Exception {
		System.out.println("HelloController.handleRequest()");
		req.setAttribute("a", "aaaa");
		userService.add(req.getParameter("uname")); 
		return new ModelAndView("index");
	}

	public UserService getUserService() {
		return userService;
	}

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

	
}

好了,基于配置文件的spring MVC就算完成了,配置文件还真多,不过项目结构很清晰,有经验的朋友一看就懂。

 

 

 

 

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