刚学完Mybatis，Spring，SpringMVC
尝试进行一个整合开发，记录一下搭建流程
1.环境与开发工具
IDEA
MySQL 8.0.16
Tomcat 9.0.21
Maven 3.6.1
2.项目准备
1.创建一个maven工程
2.依赖注入
<dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.16</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.2.1</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.2</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.2</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.8.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.8.RELEASE</version></dependency></dependencies>3.配置静态资源导出
<build><resources><resource><directory>src/main/java</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource><resource><directory>src/main/resources</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource></resources></build>4.连接数据库
这里可能连接失败报错[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.
是因为系统默认的时区与IDEA连接数据库的时区 (MySQL默认时区为UTC) 不一致
按照格林威治的时间，我们属于东八区时间，领先UTC八个小时，所以说存在8小时的时差，需要修改
MySQL 8.0以上才存在此问题，如使用的是MySQL 5.7可以忽略
3.编写配置文件
1.applicationContext.xml
<?xml version="" encoding="UTF-8" ?><beans xmlns=""xmlns:xsi=""xsi:schemaLocation="/spring-beans.xsd"><import resource="classpath:"/><import resource="classpath:"/><import resource="classpath:"/></beans>2.
<?xml version="" encoding="UTF-8" ?><!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN"""><configuration><typeAliases><package name=""/></typeAliases><mappers><mapper class=""/></mappers></configuration>3.
4.编写Mybatis层
1.与数据表对应的简单实体类(pojo)
2.与各实体类对应的Mapper接口(dao)
3.各接口的实现类(service)
整合dao层
1.关联数据库配置文件()
<context:property-placeholder location="classpath:"/>2.连接池
<bean id="dataSource" class=""><property name="driver" value="${}"/><property name="url" value="${}"/><property name="username" value="${}"/><property name="password" value="${}"/></bean>这里使用的是Druid，也可以使用c3p0、dbcp等
3.sqlSessionFactory
<bean id="sqlSessionFactory" class=""><property name="dataSource" ref="dataSource"/><property name="configLocation" value="classpath:"/></bean>4.配置dao接口扫描包，动态实现dao接口注入到Spring容器
<bean class=""><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/><property name="basePackage" value=""/></bean>整合Service层
1.扫描service下的包
<context:component-scan base-package=""/>2.将业务类注入Spring(可注解实现)
3.声明式事务配置
<bean id="transactionManager" class=""><property name="dataSource" ref="dataSource"/></bean>7.整合SpringMVC
1.给maven项目增加web支持
2.在配置DispathcherServlet
<servlet><servlet-name>spring-mvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>spring-mvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping>3.配置乱码过滤
<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></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>注意：/和/*的区别，前者不会扫描.jsp文件，后者会。所以过滤器这里需要写/*，而DispathcherServlet核心分发器是/。
4.设置session过期时间
<session-config><session-timeout>15</session-timeout></session-config>5.配置(处理器映射器、处理器适配器、视图解析器)
其中，处理器映射器和处理器适配器在使用了注解驱动的情况下可以省略
<!--注解驱动--><mvc:annotation-driven/><!--静态资源过滤--><mvc:default-servlet-handler/><!--扫描controller--><context:component-scan base-package=""/><!--视图解析器--><bean class=""><property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/></bean>
