Spring MVC框架实例
Spring MVC 背景介绍
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,能够选择是使用内置的 Spring Web 框架还是 Struts 这种 Web 框架。通过策略接口。Spring 框架是高度可配置的。并且包括多种视图技术,比如 JavaServer Pages(JSP)技术、Velocity、Tiles、iText 和 POI。Spring MVC 框架并不知道使用的视图,所以不会强迫您仅仅使用 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easy进行定制。
下载源代码:Spring MVC框架实例
常见MVC框架比較
执行性能上:
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的性能低的原因是由于OGNL和值栈造成的。
所以,假设你的系统并发量高,能够使用freemaker进行显示,而不是採用OGNL和值栈。这样。在性能上会有相当大得提高。
基于spring2.5的採用XML配置的spring MVC项目
注:本项目所有基于XML配置。同一时候,集成了hibernate。採用的是: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。其它jar包为hibernate相关jar包)
3. 改动web.xml例如以下:
<? 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. 添加web-config.xml(这里包括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,全部控制层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下添加service-config.xml(这里包括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下添加hib-config.xml(这里包括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开头的方法不须要在事务中执行 。 有些情况是没有必要使用事务的,比方获取数据。开启事务本身对性能是有一定的影响的--> <tx:method name="*"/> <!-- 其它方法在实务中执行 --> </tx:attributes> </tx:advice>
</beans> |
7. 在WEB-INF下添加dao-config.xml(这里包括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. 建立相关类和包结构,例如以下图所看到的:
9. 各类代码例如以下:
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; } } |
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; } } |
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; } } |
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; }
} |
10. 执行測试:
http://locahost:8080/springmvc01/user.do?
结果:数据库中添加zhangsan的记录。页面跳转到index.jsp上,显示:
下载源代码:Spring MVC框架实例
posted on 2017-06-09 17:40 yjbjingcha 阅读(199) 评论(0) 编辑 收藏 举报