关于SSM框架的整合

2020-07-16 SSM SSM 评论

SSM框架整合

更为具体的整合教程请看这篇。

首先明白SSM是什么，SSM就是 Spring , SpringMVC , Mybatis。

配置 Maven

我们首先要引入pom.xml文件，配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.skdjq</groupId>
    <artifactId>coolmeeting</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.23</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.28</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.11.1</version>
        </dependency>
    </dependencies>


    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>

</project>

我这里是采用了 freemarker 模板，具体的可根据自己的情况更换。

整合SSM

整合SSM是比较麻烦的，所以我们要有一个顺序，我的顺序是先整合 “SS”，即 Spring 和 SpringMVC，再整合 Mybatis。

首先对于 Spring 和 SpringMVC 有几个注意点：

Spring 扫描除了 Controller 以外的所有包。

SpringMVC 扫描 Controller 包。

Mybatis 在 Spring 中配置。

视图解析器在 SpringMVC 中配置。

Spring 和 SpringMVC 的配置文件最终要在 web.xml中加载。

接下来就是我们的配置文件：

applicationContext.xml

Spring —-> applicationContext.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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="com.skdjq" use-default-filters="true">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置Mybatis -->
    <context:property-placeholder location="classpath:db.properties"/>

    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <property name="url" value="${db.url}"/>
    </bean>

    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.skdjq.model"/>
        <property name="mapperLocations">
            <value>
                classpath*:com/skdjq/mapper/*.xml
            </value>
        </property>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="mapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"/>
        <!-- 接口文件位置 -->
        <property name="basePackage" value="com.skdjq.mapper"/>
    </bean>

    <!-- 事务配置 -->
    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 注意：tx:advice必须是结尾为"tx"的 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*"/>
            <tx:method name="update*"/>
            <tx:method name="delete*"/>
            <tx:method name="insert*"/>
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <aop:pointcut id="pcl" expression="execution(* com.skdjq.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pcl"/>
    </aop:config>
</beans>

spring-servlet.xml

SpringMVC —-> spring-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
       https://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:component-scan base-package="com.skdjq" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
<mvc:annotation-driven/>

    <mvc:resources mapping="/**" location="/"/>

    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/images/**"/>
            <mvc:exclude-mapping path="/styles/**"/>
            <bean class="com.skdjq.interceptor.PermissInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:freemarker-var.properties</value>
            </list>
        </property>
    </bean>

    <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
        <property name="templateLoaderPath" value="/WEB-INF/ftl/"/>
        <property name="defaultEncoding" value="UTF-8"/>
        <property name="freemarkerVariables">
            <map>
                <entry key="root" value="${root}"/>
            </map>
        </property>
        <property name="freemarkerSettings">
            <props>
                <prop key="template_update_delay">10</prop>
                <prop key="locale">zh_CN</prop>
                <prop key="datetime_format">yyyy-MM-dd HH:mm:ss</prop>
                <prop key="date_format">yyyy-MM-dd</prop>
                <prop key="time_format">HH:mm:ss</prop>
                <prop key="number_format">#.####</prop>
            </props>
        </property>
    </bean>
    <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView"/>
        <property name="suffix" value=".ftl"/>
        <property name="allowRequestOverride" value="true"/>
        <property name="allowSessionOverride" value="true"/>
        <property name="exposeSessionAttributes" value="true"/>
        <property name="exposeRequestAttributes" value="true"/>
        <property name="contentType" value="text/html;charset=utf-8"/>
    </bean>

</beans>

上面有很多是配置视图解析器的部分，大家可以根据情况做出调整。

web.xml

我们需要把 Spring 和 SpringMVC 的配置文件加载到web.xml中：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!-- 加载Spring配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 加载SpringMVC配置文件 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-servlet.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 编码过滤器 -->
    <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>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

其中，编码过滤器每次都可以固定使用。

以上，就是整合 SSM 框架的具体内容，如有错误，敬请指正，感谢您的阅读。

本文链接： http://skdjq.github.io/2020/07/16/guan-yu-ssm-kuang-jia-de-zheng-he/

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