SpringMVC-Mybatis学习总结整理（上）

（一）web.xml文件配置

首先，在web.xml文件中配置spring文件位置,这样可以解析所有的spring-*.xml格式文件

<!--配置spring文件位置 -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:com/xxx/xxx/config/spring-*.xml</param-value>
</context-param>

继续Spring的Servlet在web.xml中的配置，url类型可以自定义

<!-- springMVC配置 -->
<servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:com/xxx/xxx/config/spring-servlet.xml</param-value>
        </init-param>
    <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>*.htm</url-pattern>
</servlet-mapping>

另外需要对url访问进行过滤，防止直接访问后台资源，这里拦截.htm访问，对一些前台需要用到的静态资源则可以跳过过滤不设拦截

<!-- 配置spring filter -->
<filter>
    <filter-name>permissionFilter</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    <init-param>
        <param-name>targetFilterLifecycle</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>permissionFilter</filter-name>
    <url-pattern>*.htm</url-pattern>
</filter-mapping>
<!--jpg,png,js,css 文件不进行过滤-->
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.jpg</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.png</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.css</url-pattern>
</servlet-mapping>

另外还可以配置项目的编码格式

<!-- 配置utf-8编码格式 -->
<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>

为了防止JavaBeans导致的内存泄露，我们可以使用一个名为org.springframework.web.util.IntrospectorCleanupListener的监听器，在web应用关闭的时候，清除JavaBeans Introspector的监听器。

<!-- 此监听器出用于主要为了解决java.beans.Introspector导致内存泄漏的问题 -->
<listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>

（二）配置spring-servlet.xml

 配置spring扫描注解包，完成请求和注解

<!-- 启动 spring mvc 注解 -->
<context:annotation-config/>    
<!-- 配置扫描注解的包-->
<context:component-scan base-package="com.xxx.xxx">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />    
</context:component-scan>
<!-- 启动SpringMVC的请求和注解 -->  
<bean  
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
    <property name="messageConverters">  
        <list>
            <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->  
        </list>  
    </property>  
</bean>  
<!-- 完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> 
　　　<property name="jndiName" value="java:xxx"/> 
</bean>
<!-- 对转向页面的路径解析。prefix：前缀， suffix：后缀 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
    p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
<!-- 默认的注解映射的支持 --> 
<mvc:annotation-driven />
<!-- 对静态资源的控制 -->
<mvc:default-servlet-handler/>

spring中配置mybatis，这里在spring中配置mybatis的sqlSessionFactory，这样在程序中就不需要直接使用 SqlSessionFactoryBean 或和其对应的 SqlSessionFactory

<!-- 在spring中配置mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
     <property name="dataSource" ref="dataSource" />  
     <!-- 自动扫描mapping.xml文件 -->  
     <property name="mapperLocations" value="classpath:com/xxx/xxx/mapping/*.xml"></property>
     <!-- MyBatis属性信息设置 -->
     <property name="configLocation" value="classpath:com/xxx/xxx/config/mybatis.xml"></property>  
 </bean>  
 <!-- DAO接口所在包名，Spring会自动查找其下的类 -->  
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
     <property name="basePackage" value="com.xxx.xxx.dao" />  
     <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
 </bean> 
 <!-- 定义事物 -->
 <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
     <property name="dataSource" ref="dataSource" />  
 </bean>
 <!--tx:annotation-driven transaction-manager="txManager" /-->
 <tx:advice id="txAdvice" transaction-manager="txManager">
     <tx:attributes>
         <tx:method name="query*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="select*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="get*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="modify*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="save*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="delete*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="update*" propagation="NOT_SUPPORTED" read-only="true"/>
         <tx:method name="*" propagation="REQUIRED"/>
     </tx:attributes>
 </tx:advice>

 另外mybatis需要导入两个jar包

Mybatis.xml文件配置,这里对数据类型的配置和其他属性配置不作赘述

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE configuration  
   PUBLIC "-//mybatis.org//DTDConfig 3.0//EN"  
  "http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>
    ... ...
</configuration>