[置顶] 基于spring3.0注解实现的spring MVC项目

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：

<?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>

4、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;
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

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

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

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。