Spring MVC 学习笔记(一) 基于spring2.5的纯xml配置

写在前面的小尾巴 其实这个还有spring都是看尚学堂的视频 基本差不离 人家交的就是好 恩 这个就是做个学习笔记什么的 以上

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。

本篇基于xml配置 集成hibernate spring MVC+hibernate+spring的开发架构

建立web项目

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



3.在web—inf目录下配置web.xml文件 同时这里的其他的层xml配置文件采取同级目录

<?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> <!--自定义初始化的各种配置文件-->
</init-param>
<load-on-startup>1</load-on-startup> <!--在项目开启时自动初始化配置-->
</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 .建立相关类和包结构，如下图所示



9 .各类代码如下：

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;
}
}
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;
}

}
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;
}

}
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;
}

}