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我们采用sprng MVC开发项目时，通常都会采用注解的方式，这样可以大大提高我们的开发效率。实现零配置。下面我们从零开始重新做一个spring MVC的配置。这个项目完全采用注解的方式开发。
前面的建立项目导入jar包不再叙述。
1、 修改web.xml，文件内容如下：
[html] view plain copy <?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>springmvc</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/springmvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>2、springmvc-servlet.xml配置内容如下：
<?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:p="http://www.springframework.org/schema/p" 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/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <!-- 对web包中的所有类进行扫描，以完成Bean创建和自动依赖注入的功能 --> <context:component-scan base-package="com.sxt"/> <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> <!--对模型视图名称的解析，即在模型视图名称添加前后缀 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:suffix=".jsp"/> </beans>
3、 hib-config.xml(配置了spring集成hibernate)
<?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>
view plai co
4、javaBean类
[java] view plain copy 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; private String pwd; public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } 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; } }5、dao类
[java] view plain copy package com.sxt.dao; import javax.annotation.Resource; import org.springframework.orm.hibernate3.HibernateTemplate; import org.springframework.stereotype.Repository; import com.sxt.po.User; @Repository("userDao") public class UserDao { @Resource 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; } }6、service类
[java] view plain copy package com.sxt.service; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.sxt.dao.UserDao; import com.sxt.po.User; @Service("userService") public class UserService { @Resource 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; } }7、control类
[java] view plain copy package com.sxt.web; import javax.annotation.Resource; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.SessionAttributes; import com.sxt.po.User; import com.sxt.service.UserService; @Controller("userController") @RequestMapping("/user.do") public class UserController { @Resource private UserService userService; @RequestMapping(params="method=reg") public String reg(String uname) { System.out.println("HelloController.handleRequest()"); userService.add(uname); return "index"; } public UserService getUserService() { return userService; } public void setUserService(UserService userService) { this.userService = userService; } }8、WEB-INF下建立index.jsp。Index.jsp的内容如下：
<body> <h1>**********${params.uname}</h1> <h1>**********${requestScope.u}</h1> <h1>**********${requestScope.user}</h1> </body>
好了，基于spring3.0注解实现的spring MVC项目也已经完成了。相比配置xml更少一点，不过对于没有经验的朋友来说结构不是很清晰，建立没有经验的朋友先从配置xml学起，然后再学习注解方法。
