SpringMVC轻松学习-环境搭建（二）

基于spring2.5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包(spring.jar, spring-webmvc.jar, commons-logging.jar。其他jar包为hibernate相关jar包)

上面是SpringMVC的所有包，我将这些jar包放在了我的百度云盘中，当然你也可以去百度搜索，下面就是正文了。。。。

​下面我们先配置web.xml

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<?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>

配置说明：

• 核心控制器为org.springframework.web.servlet.DispatcherServlet
• 然后就是控制的是*.do的进行过滤，这些和Struts2的其实是一样的。
• 然后就是<init-param>里面的是Spring的配置文件
• <load-on-startup>项目被加载的时候就启动他的初始化方法
• 这里的配置文件web-config.xml其实和struts2-config.xml一样的作用

下面介绍web-config.xml文件

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<?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>

view层：包括前缀和后缀，其中后缀是说，我们返回一个如a，则后面就直接是.jsp，直接给你配置a.jsp；前缀的话，如返回的是a，则默认给你添加一个前缀为/myjsp/a.jsp，这些都是默认的

之后是service-config.xml，主要是配置业务逻辑层的bean

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<?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>

下面是hib-config.xml

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<?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>

dao-config.xml

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<?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>

包的结构为下面：

user.java

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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;     } }

UserDao.java

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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;     }       }

UserService.java

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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;     }       }

UserController.java 这里一般是叫controller，而且是实现controller接口

我们可以看见接口controller的实现是怎样的

其实controller是实现的HttpServletRequest和HttpServletResponse方法，很像servlet一样。

ModelAndView是MVC中的M和V就是数据和视图，比如我们跳转到ok.jsp中有页面还得有数据。

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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;     }         }

controller层中我们返回的是new ModelAndView("index")；这就对应我们之前说的前缀和后缀的问题，这里就会跳转到index.jsp中

    运行测试：

http://locahost:8080/springmvc01/user.do?uname=zhangsan。

 

结果：数据库中增加zhangsan的记录。页面跳转到index.jsp上，显示：

来自为知笔记(Wiz)