SpringMVC入门配置web.config及applicationContent-mvc.xml_web。config是哪个框架-优快云博客

本文详细介绍了如何使用SpringMVC框架与MyBatis持久层框架进行整合，包括配置文件、日志配置、数据库连接池、视图解析器及拦截器的设置，以及如何在整合过程中解决可能出现的问题。

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转：.net/tonytfjing/article/details/39203121

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SpringMVC
springMybatis-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\=convertToNull
jdbc.username=root
jdbc.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
 */
@Controller
public class SystemController {
	private final Logger log = LoggerFactory.getLogger(SystemController.class);
	@Resource
	private 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>