• 整合配置SpringMVC+Spring+MyBatis


    1、包结构

    2、配置web.xml

    <!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns="http://xmlns.jcp.org/xml/ns/javaee"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
             id="WebApp_ID" version="3.1">
      <display-name>demo_CRUD</display-name>
    
      <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>index.html</welcome-file>
      </welcome-file-list>
    
      <!--配置Spring前端过滤器,处理中文乱码-->
      <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>forceEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
      </filter>
    
      <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    
      <!--配置Spring MVC核心控制器-->
      <servlet>
        <!--名称 -->
        <servlet-name>springmvc</servlet-name>
        <!-- Servlet类 -->
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 启动顺序,数字越小,启动越早 -->
        <load-on-startup>1</load-on-startup>
        <init-param>
          <!--SpringMVC配置参数文件的位置 -->
          <param-name>contextConfigLocation</param-name>
          <!--默认名称为ServletName-servlet.xml -->
          <param-value>
            /WEB-INF/springmvc-servlet.xml,
            /WEB-INF/di.xml
          </param-value>
        </init-param>
      </servlet>
    
      <!--所有请求都会被springmvc拦截 -->
      <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
    </web-app>

    3、SpringMVC的配置:springmvc-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:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        ">
    
        <!-- Spring MVC不处理静态资源 -->
        <mvc:default-servlet-handler />
        <!-- 支持mvc注解驱动 -->
        <mvc:annotation-driven />
    
        <!-- 视图解析器 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
                id="internalResourceViewResolver">
            <!-- 前缀 -->
            <property name="prefix" value="/" />
            <!-- 后缀 -->
            <property name="suffix" value=".jsp" />
        </bean>
    
        <!-- 全局异常处理 -->
        <bean
                class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
            <!-- 定义默认的异常处理页面,当该异常类型的注册时使用 -->
            <property name="defaultErrorView" value="error"></property>
            <!-- 定义异常处理页面用来获取异常信息的变量名,默认名为exception -->
            <property name="exceptionAttribute" value="ex"></property>
            <!-- 定义需要特殊处理的异常,用类名或完全路径名作为key,异常也页名作为值 -->
            <property name="exceptionMappings">
                <props>
                    <prop key="java.lang.Exception">error</prop>
                </props>
            </property>
        </bean>
    
        <!-- 配置文件上传 -->
        <!--200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常
        <bean id="multipartResolver"
              class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="maxUploadSize" value="209715200" />
            <property name="maxUploadSizePerFile" value="2097152"/>
            <property name="defaultEncoding" value="UTF-8" />
            <property name="resolveLazily" value="true" />
        </bean>
     -->
    </beans>

    4、di.xml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:aop="http://www.springframework.org/schema/aop"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-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
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd
        ">
        
        <!-- 开启注解 -->
        <context:annotation-config/>
        <!-- 设置扫描范围 -->
        <context:component-scan base-package="com.stu"/>
        <!-- 设置自动代理 -->
        <aop:aspectj-autoproxy/>
        
        <!-- 创建数据源(c3p0)-->
         <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
            destroy-method="close">
            <property name="driverClass" value="com.mysql.jdbc.Driver" />
            <property name="jdbcUrl"
            value="jdbc:mysql://localhost:3306/mydb?useUnicode=true&amp;characterEncoding=utf8" />
            <property name="user" value="root" />
            <property name="password" value="root"/>
         </bean>
    
        <!-- 配置SqlSessionFactory对象 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 注入数据库连接池 -->
            <property name="dataSource" ref="dataSource"/>
            <!-- 扫描entity包 使用别名 -->
            <property name="typeAliasesPackage" value="com.stu.entity"/>
            <!-- 扫描sql配置文件:mapping需要的xml文件 -->
            <property name="mapperLocations" value="classpath:mapping/*.xml"/>
        </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.stu.dao"/>
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        </bean>
    
        <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        <!-- 设置事务的传播级别 -->
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="*" propagation="REQUIRED"/>
            </tx:attributes>
        </tx:advice>
    
        <!-- 构建切面 -->
        <aop:config>
            <aop:pointcut expression="execution(* com.stu.service..*.*(..))" id="mycut"/>
            <aop:advisor advice-ref="txAdvice" pointcut-ref="mycut"/>
        </aop:config>
    
    </beans>

    配置好这三个文件之后,我们就可以动手做正事了!!

    Dao接口代码:

    然后是Service部分代码:

    我们可以看到@Resource引入Dao层依赖的时候,会有报错,但其实这不要紧,这是Idea自己干的事,可以忽略这个报错。

    接下来我们看Controller的部分代码:

    我们启动服务,看看,能不能取得数据:

    数据成功获取,Success!

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  • 原文地址:https://www.cnblogs.com/lark-/p/8377687.html
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