讲解SSM的xml文件

概述：这些配置文件很烦，建议直接复制粘贴

springMVC.xml文件

<?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">

    <context:component-scan base-package="edu.gyc"/>
    <mvc:annotation-driven/>
    <!--解决静态资源js css访问的问题-->
    <mvc:default-servlet-handler/>
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
</bean>
</beans>

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
        http://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
        http://www.springframework.org/schema/aop/spring-aop.xsd">

    <context:component-scan base-package="edu.gyc">

    </context:component-scan>
    <!-- 读取java配置文件，替换占位符数据 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <!-- 数据库基本信息配置 -->
        <property name="url" value="${druid.url}" />
        <property name="username" value="${druid.username}" />
        <property name="password" value="${druid.password}" />
        <property name = "driverClassName" value = "com.mysql.cj.jdbc.Driver" />

        <!-- 初始化连接数量 -->
        <property name="initialSize" value="${druid.initialSize}" />
        <!-- 最小空闲连接数 -->
        <property name="minIdle" value="${druid.minIdle}" />
        <!-- 最大并发连接数 -->
        <property name="maxActive" value="${druid.maxActive}" />
        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="${druid.maxWait}" />


    </bean>

    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入dataSource -->
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>

    </bean>

    <!-- 配置Mapper代理对象方式一：MapperFactoryBean（了解） -->
    <!-- 通过MapperFactoryBean生成的代理对象，一次只能针对一个接口进行生成 -->
    <!--<bean id="accountMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
        <property name="mapperInterface" value="top.alanshelby.mapper.AccountMapper"></property>
    </bean>-->

    <!-- 配置Mapper代理对象方式二：MapperScannerConfigurer -->
    <!-- 批量代理对象的生成 -->
    <!-- 注意事项：mapper接口类和mapper映射文件同包同名 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 指定需要生成代理的接口所在的包名 -->
        <property name="basePackage" value="edu.gyc.dao"/>
        <!-- 注意事项：千万不要配置SqlSessionFactory，要配置sqlSessionFactoryBeanName -->
        <!-- <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <!-- 配置平台事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="transfer*" propagation="REQUIRED" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>

    <!-- 实现注解的声明式事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" mode="proxy"/>
</beans>

在这个文件中就已经配置了sqlSessionFactory、MapperScannerConfigurer 。

一个用来与数据库进行交互的，一个用来扫描包的。

项目结构：

然后配置一下jdbc.properties

druid.driverClassName=com.mysql.cj.jdbc.Driver
druid.url=jdbc:mysql://127.0.0.1:3306/cyl?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
druid.username=root
druid.password=123456
druid.initialSize=10
druid.minIdle=6
druid.maxActive=50
druid.maxWait=60000

pom依赖：

<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.3.7</version>
    </dependency>
    <!-- mybatis依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.21</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.27</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>

    </dependency>

    <!-- 持久层依赖 begin -->
    <!-- spring ioc组件需要的依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <!-- spring 事务管理和JDBC依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <!-- mysql数据库驱动包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.27</version>
    </dependency>
    <!-- druid连接池的依赖包 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.0.29</version>
    </dependency>

    <!-- mybatis依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <!-- mybatis和spring的整合依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
    <!-- 持久层依赖 end -->

    <!-- 业务层依赖 begin -->
    <!-- 基于AspectJ的aop依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>1.0</version>
    </dependency>
    <!-- 业务层依赖 end -->

    <!-- 表现层依赖 begin -->
    <!-- SpringMVC 相关包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- 表现层依赖 end -->

    <!-- 单元测试依赖 begin -->
    <!-- spring 单元测试组件包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
    <!-- 单元测试Junit -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <!-- 单元测试依赖 end -->

    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.3.7</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.21</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.9</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.9</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.8.9</version>
    </dependency>

    <!--fastJson是一个JSON的处理工具包，由阿里巴巴公司研发推出。
    我们使用它将List或者Map转换成JSON对象-->
    <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.34</version>
    </dependency>
  </dependencies>