Spring+SpringMVC+Mybatis 环境搭建

一、环境 mac + Idea + 数据库 mysql

二、项目整合过程

1⃣️. 创建动态Web项目，请参考：https://www.cnblogs.com/KennyWang0314/p/12261890.html

2⃣️.引入 jar 包 === ***注意：c3p0包依赖 mchange-commons 记得导入

3⃣️.文件配置

web.xml

<?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">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:application-base.xml</param-value>
    </context-param>
    
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
</web-app>

在WEB-INF 下配置 spring-servlet.xml

*** 注意：通常为了让 MVC 独立管理，会配置 context:component-scan 属性为 use-default-filters="false"并配合 include-filter使用，但是当applicationContext.xml 该属性设置为 true并配合exclude-使用

具体情况会在之后说明

<?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-3.1.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.1.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
            http://www.springframework.org/schema/task
            http://www.springframework.org/schema/task/spring-task-3.1.xsd
            http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">
    <!-- 该配置只扫描控制器 -->
    <context:component-scan base-package="com.kenny.mybatis" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <mvc:annotation-driven></mvc:annotation-driven><!-- 正确处理动态资源 -->
    <mvc:default-servlet-handler></mvc:default-servlet-handler ><!-- 正确处理静态资源 -->


</beans>

配置 Mapp

***注意：使用Idea做开发，如果需要将mapp.xml做单独文件管理，需要放到src文件夹下，因此需要在 Idea 下创建一个文件夹，并且通过 Make Directory As 设置为 Sources Root

Mybatis 配置

<?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>
    <!--
    ********配置属性时，需要注意属性对顺序是有要求的，如果顺序不对，会报错
    -->
    <!-- settings 标签
        setting 用来设置每一个设置下，name设置项的名字，value设置项的取值
        mapUnderscroeToCamelCase 数据中字段默认按照驼峰规则与属性做映射

    -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <!-- 显示的指定需要设置的属性值，不要因为默认而不设置 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="aggressiveLazyLoading" value="false"/>
        <!--cacheEnable 是否开启二级缓存-->
        <setting name="cacheEnabled" value="true"/>
    </settings>

</configuration>

applicationContext.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:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mytabis-spring="http://mybatis.org/schema/mybatis-spring"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.1.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
            http://www.springframework.org/schema/task
            http://www.springframework.org/schema/task/spring-task-3.1.xsd
            http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">

    <!-- 希望管理所有的逻辑 -->
    <context:component-scan base-package="com.kenny.mybatis">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--  -->

    <context:property-placeholder location="classpath:dbconnection.properties"></context:property-placeholder>


    <!-- Spring用来控制业务逻辑。数据源，事物控制，aop -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
    </bean>

    <!-- -->
    <bean name="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <tx:annotation-driven transaction-manager="dataSourceTransactionManager"></tx:annotation-driven>


    <!-- 整合Mybatis
       1。Spring管理所有组建
             Service ===》Dao  @AutoWire:自动注入
       2。用Spring来管理事物
     -->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 配置 mybatis 的配置文件位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 指定mapper xml 文件的位置 -->
        <property name="mapperLocations" value="classpath:mybatis/mapper/*Mapper.xml" ></property>
    </bean>

    <!-- 扫描所有DAO接口 -->
    <mytabis-spring:scan base-package="com.kenny.mybatis.dao"></mytabis-spring:scan>



</beans>

### 创建完成 ###

来源：https://www.cnblogs.com/KennyWang0314/p/12261885.html

标签

MyBatis

xmlns

servlet

context

schema