spring2.5学习笔记之一：IOC和MVC

　　　　　　　１spring2.５的使用在配置上已经有了很大的改进。特别在自动装配上面的改进最为明显。我的项目里用spring2.5和ibatis2.3来开发的，其中spring2.5就是用ioc,mvc,还有就是数据持久ibatis。现在贴一部分代码出来，分析分析。

　　　　　　　页面index.jsp

jsp页面写道 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>

<html>

<head>

<title>Insert title here</title>

</head>

<body>

<form name="form1" action="<c:url value='/userdao/checklogin.do '/>" method="post" >

<br>

</form>

</body>

</html>

　　上面的页面是一个测试的jsp页面，其中action提交请求到后台控制器,代码如下。

LoginController 写道 package com.spring.web;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

import com.spring.manageri.UserDaoManager;

@Controller

public class LoginController {

@Autowired

private UserDaoManager userDaoManager;

@SuppressWarnings("unchecked")

@RequestMapping(value="/userdao/checklogin.do ")

public ModelAndView checkLogin (HttpServletRequest request,HttpServletResponse response){

return new ModelAndView("/welcome");

}

在控制器里面的RequestMapping(value="/userdao/checklogin.do ")这个值和页面上的action 相对应。在页面提交的时候spring2.5容器便可以找到这个链接来处理请求（注意这个value="/userdao/checklogin.do "必须是全局唯一的。）　

　另外还有就是注解

　@Autowired

　private UserDaoManager userDaoManager;

UserDaoManager是一个接口，并且有它自己的实现类UserDaoManagerImpl，这个类用来处理业务逻辑。代码如下。

UserDaoManager 写道 package com.spring.manageri;

import java.util.List;

public interface UserDaoManager {

public abstract List getUserList();

} UserDaoManagerImpl 写道 package com.spring.impl;

import java.util.List;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Transactional;

import com.spring.common.IbatisDaoSupport;

import com.spring.manageri.UserDaoManager;

@Service

@Transactional

public class UserDaoManagerImpl extends IbatisDaoSupport implements UserDaoManager {

@Override

public List getUserLists() {

// TODO Auto-generated method stub

return null;

}

其中IbatisDaoSupport是一个自定类，代码如下。

IbatisDaoSupport 写道 package com.spring.common;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;

import com.ibatis.sqlmap.client.SqlMapClient;

public class IbatisDaoSupport extends SqlMapClientDaoSupport {

@Autowired

public void setSqlMapClientForAutowire(SqlMapClient sqlMapClient) {

super.setSqlMapClient(sqlMapClient);

}

这里采用这个类主要是为了避免每一次去操纵数据库都要去配置文件里注入sqlMapClient的问题，采用继承，业务逻辑的实现类只需要继承它即可。ibatis的配置文件。sqlmapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE sqlMapConfig

PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN"

"http://www.ibatis.com/dtd/sql-map-config-2.dtd">

<settings cacheModelsEnabled="true" lazyLoadingEnabled="true"

enhancementEnabled="true" errorTracingEnabled="true"

useStatementNamespaces="false" maxRequests="30" maxSessions="20"

maxTransactions="10" />

<sqlMap

resource="com/spring/domain/user.xml" />

</sqlMapConfig>

　com.spring.domain.user.xml这个文件就是ibatis的业务逻辑的实现文件，里面是对数据库的操作代码（sql）.还有就是user.xml对应的pojo，user.java：

User.java 写道 User.java 写道 package com.spring.domain;

import java.io.Serializable;

import java.util.Date;

public class User implements Serializable {

private static final long serialVersionUID = 1L;

private Integer id;

private String username;

private String password;

private String picture;

private String address;

private Integer trustlevel;

private String tel;

private String qq;

private String email;

private String ip;

private Date jointime;

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

..........................

}

　配置文件是这样的。

　首先是　applicationcontext-web.xml

applicationcontext-web.xml 写道 <?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">

<context:component-scan base-package="com.spring.web"/>

</bean>

<bean id="urlFilenameViewController"

class="org.springframework.web.servlet.mvc.UrlFilenameViewController"/>

</beans>

<context:component-scan base-package="com.spring.web"/>明确要扫描的控制包。

１<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>

２<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

其中１和２用来处理通过方法名称的映射。是页面请求提交到后台的路径的解释器。

Autowired 写道 <?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:aop="http://www.springframework.org/schema/aop"

xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee"

xmlns:tx="http://www.springframework.org/schema/tx"

xsi:schemaLocation="

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd

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

http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd

http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<context:annotation-config/>

<context:component-scan base-package="com.spring.impl" />

</beans>

这个配置文件指明了处理业务逻辑的包，这样Spring容器可以制动装配类对象。下面的配置文件用来连接数据库：并且把数据源注入到ibatis中

applicationContext-propertyConfigurer.xml 写道 <?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:aop="http://www.springframework.org/schema/aop"

xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee"

xmlns:tx="http://www.springframework.org/schema/tx"

xsi:schemaLocation="

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd

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

http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd

http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<!-- bean id="dataSource"

class="com.mchange.v2.c3p0.ComboPooledDataSource"

destroy-method="close" p:driverClass="${jdbc.driverClass}"

p:jdbcUrl="${jdbc.jdbcUrl}" p:user="${jdbc.user}"

p:password="${jdbc.password}">

<property name="initialPoolSize"

value="5" />

</bean-->

<bean id="dataSource"

class="com.mchange.v2.c3p0.ComboPooledDataSource"

destroy-method="close" p:driverClass="oracle.jdbc.driver.OracleDriver"

p:jdbcUrl="jdbc:oracle:thin:@127.0.0.1:1521:oracle9" p:user="dgdr"

p:password="dgdr">

<property name="initialPoolSize"

value="5" />

</bean>

<bean id="transactionManager"

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource" />

<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="lobHandler"

class="org.springframework.jdbc.support.lob.DefaultLobHandler" />

<bean id="sqlMapClient"

class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">

<property name="configLocation"

value="/WEB-INF/config/ibatis/sqlmap-config.xml">

</property>

</bean>

</beans>

<bean id="sqlMapClient"

class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">

<property name="configLocation"

value="/WEB-INF/config/ibatis/sqlmap-config.xml">

</property>

</bean>

把数据源注入到ibatis中。下面是web.xml的综合配置。

web.xml 写道 <?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

id="WebApp_ID" version="2.5">

<display-name>spring</display-name>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/config/applicationContext-propertyConfigurer.xml

/WEB-INF/config/applicationContext-business.xml

</param-value>

</context-param>

<context-param>

<param-name>log4jConfigLocation</param-name>

<param-value>/WEB-INF/config/log4j.properties</param-value>

</context-param>

<filter-name>Encoding</filter-name>

<filter-class>

org.springframework.web.filter.CharacterEncodingFilter

</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>UTF-8</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>Encoding</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

</listener>

<listener-class> org.springframework.web.context.ContextLoaderListener </listener-class>

</listener>

<servlet-name>spring</servlet-name>

<servlet-class>

org.springframework.web.servlet.DispatcherServlet

</servlet-class>

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/config/applicationContext-web.xml

</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>spring</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

<welcome-file-list>

<welcome-file>jsp/index.jsp</welcome-file>

</welcome-file-list>

</web-app>

spring2.5学习笔记之一：IOC和MVC

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