目前主流的Web MVC框架，除了Struts这个主力 外，还有Spring MVC，主要是由于Spring MVC配置比较简单，使用起来也十分明了，非常灵活，与Spring 集成较好，对RESTful API的支持也比struts要好。MyBatis是ibatis的升级版，作为hibernate的老对手，它 是一个可以自定义SQL、存储过程和高级映射的持久层框架。与hibernate的主要区别就是mybatis是半自动化的，而hibernate是全自动的，所以当应用需求越来越复杂的时候，自动化的sql显得比较笨拙。由于前段时间接了个项目要用springmvc做，所以我抱着练手的态度，又玩起了整合框架的游戏。经常搭框架的人应该都清楚，框架搭建的核心就是配置文件。所以我主要贴下几个配置文件的代码。还是那句话，我都是写好配置文件之后，运行报错再加jar。这里列一下我用的jar包（应该是最少的）：
备注：上图有一些额外的jar，比如我用的数据库连接池是阿里巴巴的druid、日志框架式logback，所以引入了相关jar。关于这两个框架的使用和配置都是非常简单的，所以这里就不细说。1.整合SpringMVCspringMybatis-servlet.xml：<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 启用spring mvc 注解--> <mvc:annotation-driven> </mvc:annotation-driven><!-- 自动扫描的包名 ，使Spring支持自动检测组件，如注解的Controller--> <context:component-scan base-package="com.alibaba.controller" /> <context:component-scan base-package="com.alibaba.service"/> <!-- 视图解析器:定义跳转的文件的前后缀 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> <!--可为空,方便实现自已的依据扩展名来选择视图解释类的逻辑 --> </bean> <!--配置拦截器, 多个拦截器,顺序执行 --> <mvc:interceptors> <mvc:interceptor> <!-- 匹配的是url路径 --><mvc:mapping path="/" /><mvc:mapping path="/user/**" /><mvc:mapping path="/test/**" /><bean class="com.alibaba.interceptor.CommonInterceptor"></bean> </mvc:interceptor><!-- 当设置多个拦截器时，先按顺序调用preHandle方法，然后逆序调用每个拦截器的postHandle和afterCompletion方法 --></mvc:interceptors> </beans>
2.整合Mybatis
spring-dao.xml:<?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:mybatis="http://mybatis.org/schema/mybatis-spring" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 该包下的类支持注解，表示会被当作{@code mybatis mapper}处理 配置了之后表示可以自动引入mapper类--> <mybatis:scan base-package="com.alibaba.dao"/> <!--引入属性文件 --> <context:property-placeholder location="classpath:configuration.properties"/> <!--数据库连接--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize"><value>1</value></property> <property name="maxActive"><value>5</value></property> <property name="minIdle"><value>1</value></property> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait"><value>60000</value></property> <!-- 配置监控统计拦截的filters --> <property name="filters"><value>stat</value></property> <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis"><value>60000</value></property> <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --> <property name="minEvictableIdleTimeMillis"><value>300000</value></property> <!-- <property name="validationQuery"><value>SELECT 'x'</value></property> <property name="testWhileIdle"><value>true</value></property> <property name="testOnBorrow"><value>false</value></property> <property name="testOnReturn"><value>false</value></property> <property name="poolPreparedStatements"><value>true</value></property> <property name="maxOpenPreparedStatements"><value>20</value></property> --> </bean> <!-- mybatis配置 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> </beans>
3.web.xml整合SpringMVC和Mybatis
<?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_3_0.xsd" version="3.0"> <!-- 该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目录，如原来访问 http://localhost/foo.css ,现在http://localhost/static/foo.css --> <!-- 不拦截静态文件 --> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>/js/*</url-pattern> <url-pattern>/css/*</url-pattern> <url-pattern>/images/*</url-pattern> <url-pattern>/fonts/*</url-pattern> </servlet-mapping> <!-- 配置字符集 --> <filter> <filter-name>encodingFilter</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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 初始化 DispatcherServlet时，该框架在 web应用程序WEB-INF目录中寻找一个名为[servlet-名称]-servlet.xml的文件，并在那里定义相关的Beans，重写在全局中定义的任何Beans --> <servlet> <servlet-name>springMybatis</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMybatis</servlet-name> <!-- 所有的的请求，都会被DispatcherServlet处理 --> <url-pattern>/</url-pattern> </servlet-mapping> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/config/spring-*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- druid web 监控 --> <servlet> <servlet-name>DruidStatView</servlet-name><servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DruidStatView</servlet-name> <url-pattern>/druid/*</url-pattern> </servlet-mapping> <error-page> <error-code>404</error-code> <location>/error/404.jsp</location> </error-page> <error-page> <error-code>500</error-code> <location>/error/500.jsp</location> </error-page></web-app>
4.logback.xml日志配置<?xml version="1.0" encoding="UTF-8"?><configuration> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <logger name="test.LogbackTest" level="TRACE"/> <logger name="com.alibaba.controller.TestController" level="TRACE"/> <logger name="org.springframework.web.servlet.DispatcherServlet" level="DEBUG" /> <logger name="druid.sql" level="INFO" /><!-- 如果spring-config里面没有配置slf4j,就不会显示sql日志，logback只是slf4j的一个实现 --> <root level="debug"> <appender-ref ref="STDOUT" /> </root></configuration>5.configuration.properties配置jdbc.url=jdbc\:mysql\://localhost\:3306/druid?useUnicode\=true&characterEncoding\=UTF-8&zeroDateTimeBehavior\=convertToNulljdbc.username=rootjdbc.password=123456
6.测试搭建是否成功，后台代码
首先是登录，用了加密，可以去掉
package com.alibaba.controller;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import org.apache.commons.codec.digest.DigestUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.alibaba.model.User;import com.alibaba.service.UserService;import com.alibaba.util.RequestUtil;/** * @author tfj * 2014-7-26 */@Controllerpublic class SystemController {private final Logger log = LoggerFactory.getLogger(SystemController.class);@Resourceprivate UserService userService;@RequestMapping(value = "/",method = RequestMethod.GET)public String home() {log.info("返回首页！");return "index";}@RequestMapping(value = "/test/hello",method = RequestMethod.GET) public String testHello() { log.info("执行了testHello方法！"); return "testHello"; } @RequestMapping(value = "/login",method = RequestMethod.POST) public String testLogin(HttpServletRequest request,@RequestParam String username, @RequestParam String password) { log.info("执行了testLogin方法！"); User user = userService.findUserByName(username); if(user!=null){ if(user.getPassword().equals(DigestUtils.md5Hex(password))){ request.getSession().setAttribute("userId", user.getId()); request.getSession().setAttribute("user", username); return "redirect:" + RequestUtil.retrieveSavedRequest();//跳转至访问页面 }else{ log.info("密码错误"); request.getSession().setAttribute("message", "用户名密码错误，请重新登录"); return "login"; } }else{ log.info("用户名不存在"); request.getSession().setAttribute("message", "用户名不存在，请重新登录"); return "login"; } }}关于service和model就不写了，写一下mybatis的mapper类映射<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.alibaba.dao.UserMapper"> <select id="findUserByName" resultType="com.alibaba.model.User">select id, username , password from sysuser where username = #{username} </select></mapper>7.前台jsp主要是登录和登录成功的页面，就不写了
贴一下截图：
到此，springmvc+mybatis整合成功。后续复杂的功能待添加
注意事项
1.框架中关于druid和logback的配置都是从官网上copy下来的，所以都是最基本的，读者可以忽略，也可以换成读者熟悉的数据库组件和日志框架，如c3p0和log4j。
2.代码里加入了权限管理，即访问前需登录，登录后跳转至待访问页面，关于springmvc的权限管理请看：http://blog.csdn.net/tonytfjing/article/details/39207551
3.本文是从我的测试代码里剥离出来的最简单的也是最基本的代码，有些没剥离干净的地方还请见谅
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