SSM框架的基本配置

相信不少初学习SSM框架的同学被框架各个配置文件弄晕，这些配置文件有不少配置是整合Spring，SpringMVC，Mybatis的必须基本配置，这里作下总结。

先讲需要导入的jar包

asm-3.2.0.RELEASE.jar

asm-3.3.1.jar

c3p0-0.9.jar

cglib-2.2.2.jar

com.springsource.net.sf.cglib-2.2.0.jar

com.springsource.org.aopalliance-1.0.0.jar

com.springsource.org.apache.commons.logging-1.1.1.jar

com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar

jackson-core-asl-1.7.2.jar

jackson-mapper-asl-1.7.2.jar

javassist-3.17.1-GA.jar

javax.servlet.jsp.jstl.jar

jsf-api.jar

jsf-impl.jar

jstl-impl.jar

junit.jar

log4j-1.2.17.jar

mybatis-3.2.2.jar

mybatis-spring-1.2.0.jar

mysql-connector-java-5.1.26-bin.jar

org.hamcrest.core_1.1.0.v20090501071000.jar

org.springframework.transaction-3.2.2.RELEASE.jar

slf4j-api-1.7.5.jar

slf4j-log4j12-1.7.5.jar

spring-aop-3.2.0.RELEASE.jar

spring-beans-3.2.0.RELEASE.jar

spring-context-3.2.0.RELEASE.jar

spring-core-3.2.0.RELEASE.jar

spring-expression-3.2.0.RELEASE.jar

spring-jdbc-3.2.0.RELEASE.jar

spring-orm-3.2.0.RELEASE.jar

spring-test-3.2.0.RELEASE.jar

spring-web-3.2.0.RELEASE.jar

spring-webmvc-3.2.0.RELEASE.jar

首先是web.xml，这是项目的全局配置文件

这里负责：加载applicationContext.xml，springDispatcherServlet-servlet.xml

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>ssm-curd</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  
  <!-- 1，启动Spring容器 -->
  <!-- needed for ContextLoaderListener -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 这里就会加载classpath:applicationContext.xml -->
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- Bootstraps the root web application context before servlet initialization -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    
    
    <!-- 2，SpringMVC的前端控制器，拦截所有的请求 -->
    <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
    <servlet>
        <servlet-name>springDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
           <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:WEB-INF/springDispatcherServlet-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Map all requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>springDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <!-- 3，配置了前端控制器就顺便把字符编码拦截器顺便配上 -->
    <filter>
        <filter-name>CharacterEncodingFilter</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>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    
    <!-- 4，使用Rest风格的URI:将页面普通的post请求转化为指定的delete/put请求 -->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

然后是applicationContext.xml，这是Spring的配置文件

负责：数据库源，指定mybatis-config.xml（mybatis全局配置文件），指定mapper/*.xml（映射文件），事务控制

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        ">

<context:component-scan base-package="com.atguigu">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- Spring的配置文件，这里主要配置和业务逻辑有关的 -->
<!-- 数据源，事务控制。。。 -->
<context:property-placeholder location="classpath:dbconfig.properties"/>
<bean id="ComboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
    <property name="driverClass"  value="${jdbc.driverClass}"></property>
    <property name="user"  value="${jdbc.user}"></property>
    <property name="password"  value="${jdbc.password}"></property>
</bean>


<!-- =============================================== -->    


<!-- 配置和Mybatis的整合 -->
<bean id="SqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <!-- 指定配置mybatis全局配置文件的位置 -->
    <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    <!-- 指定Mybatis数据源 -->
    <property name="dataSource" value="ComboPooledDataSource"></property>
    <!-- 指定mybatis，mapper文件的位置 -->
    <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
</bean>

<!-- 配置扫描器，将mybatis接口实现到ioc容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 扫描所有的Dao接口的实现，加入到ioc容器中 -->
    <property name="basePackage" value="com.atguigu.curd.dao"></property>
</bean>
    

<!-- =============================================== -->    
    
    
<!-- 事务控制配置 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <!-- 控制住数据源 -->
    <property name="dataSource" ref="ComboPooledDataSource"></property>
</bean>
<!-- 开启基于注解的事务，推荐重要的事务用xml配置 -->
<aop:config>
    <!-- 切入点表达式 -->
    <aop:pointcut expression="execution(* com.atguigu.curd.service..*(..))" id="txPoint"/>
    <!-- 配置事务增强 -->
    <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
</aop:config>

<!-- 配置增强：事务如何切入 -->
<tx:advice id="txAdvice">
    <tx:attributes>
        <!-- 所有方法都是事务方法 -->
        <tx:method name="*"/>
        <!-- 以get开始的所有方法 -->
        <tx:method name="get*" read-only="true"/>
    </tx:attributes>
</tx:advice>


</beans>

mybatis-config.xml（mybatis全局配置文件）

通过package, 可以直接指定package的名字， mybatis会自动扫描你指定包下面的javabean,并且默认设置一个别名，默认的名字为非限定类名来作为它的别名。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
  
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <typeAliases>
        <package name="com.atguigu.curd.bean"/>
    </typeAliases>
</configuration>

springDispatcherServlet-servlet.xml，这是SpringMVC的配置文件：包含网站跳转逻辑的控制配置。

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        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-4.3.xsd">

    <!-- SpringMVC的配置文件：包含网站跳转逻辑的控制配置 -->
    <!-- 有关网站逻辑 都写-->
    
    <context:component-scan base-package="com.atguigu" use-default-filters="false">
        <!-- 只扫描控制器，禁用默认过滤规则 -->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器，方便页面返回 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <!-- 两个必须的标准配置 -->
    <!-- 将SpringMVC不能处理的请求交给tomcat -->
    <mvc:default-servlet-handler/>
    <!-- 能支持SpringMVC的更高级功能：基于JSR303校验，快捷的ajax，映射动态请求等 -->
    <mvc:annotation-driven/>
    
</beans>

参考资料https://www.cnblogs.com/zzb-yp/p/9295397.html

https://blog.csdn.net/jdbdh/article/details/83582815#2.5%E3%80%81db.properties

https://www.jianshu.com/p/eeb48046215f