简介

在开始直接我们需要了什么是ssm？

1. spring：Spring框架分为多个模块。应用程序可以选择所需的模块。核心容器的模块是核心，包括配置模型和依赖项注入机制。除此之外，Spring框架还为不同的应用程序体系结构提供了基础支持，包括消息传递，事务性数据和持久性以及Web。它还包括基于Servlet的Spring MVC Web框架，以及并行的Spring WebFlux反应式Web框架。（官网复制）
2. springMVC：Spring Web MVC是基于Servlet API构建的原始Web框架，从一开始就已包含在Spring Framework中。正式名称Spring Web MVC来自其源模块（spring-webmvc）的名称，但它通常被称为Spring MVC。
3. mybatis：MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis 。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。

Maven项目搭建

搭建一个基础web项目，打开idea选择 file>new project>Maven

项目结构

1. controller：前端访问接口层
2. service：业务逻辑层
3. entity：实体
4. dao：数据访问层
   

项目配置

主要包括maven配置、spring的配置、springMVC配置、mybatis配置、日志配置、web.xml配置

maven配置

pom.xml需要添加的依赖

<dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- spring框架包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${srping.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${srping.version}</version></dependency><!-- mybatis框架包 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency><!-- mybatis框架包 --><!-- 数据库驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.35</version></dependency><!-- 日志 --><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-classic</artifactId><version>1.2.3</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-core</artifactId><version>1.2.2</version></dependency><!-- 连接池 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>${druid.version}</version></dependency><!--lombok代码生成--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.12</version><scope>provided</scope></dependency><!-- json配置 --><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.9.1</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId><version>2.9.0</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.9.9</version></dependency></dependencies>

spring配置

添加spring核心配置文件（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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsd"><!-- 加载properties文件 --><context:property-placeholder location="classpath:jdbc.properties"/><!-- 配置数据源 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"><property name="driverClassName" value="${driver}"/><property name="url" value="${url}"/><property name="username" value="${user}"/><property name="password" value="${password}"/></bean><!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="configLocation" value="classpath:mybatis-config.xml"/><!-- 扫描sql配置文件:mapper需要的xml文件--><property name="mapperLocations" value="classpath:mapper/*.xml"/></bean><!--配置扫描dao接口--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.xxx.ssm.dao"/><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean><!--开启注解配置，会自动扫描配置的包下面的service--><context:annotation-config/><context:component-scan base-package="com.xxx.ssm.service"/><!--事物配置-->
</beans>

springMVC配置

添加springmvc配置文件（spring-mvc.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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 批量扫描Controller包下的所有类, 使用IOC容器创建对象 --><!-- 自动扫描该包, 使SpringMVC认为包下用了@Controller注解的类是控制器 --><context:component-scan base-package="com.xxx.ssm.controller"/><!-- 配置注解形式的适配器和映射器 --><mvc:annotation-driven /></beans>

mybatis配置

添加mybatis-config.xml配置文件

<?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><!-- 这里配置Mybatis的类型别名，延迟加载，二级缓存等 --><!-- 配置类型别名 --><typeAliases><package name="com.xxx.ssm.entity"/></typeAliases>
</configuration>

日志配置

添加logback.xml日志配置文件

<configuration><appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"><!-- encoder 默认配置为PatternLayoutEncoder --><encoder><pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern></encoder></appender><appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>./log/%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>30</maxHistory></rollingPolicy><encoder><pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n</pattern></encoder></appender><root level="INFO"><appender-ref ref="STDOUT"/><appender-ref ref="FILE"/></root><logger name="com.xxx.ssm.dao" level="DEBUG"><appender-ref ref="STDOUT"/></logger><!-- spring 日志 --><logger name="org.springframework" level="INFO"><appender-ref ref="STDOUT"/></logger></configuration>

web.xml配置

修改web.xml文件

<!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><display-name>Archetype Created Web Application</display-name><!--项目的欢迎页，项目运行起来后访问的页面--><welcome-file-list><welcome-file>/index.jsp</welcome-file></welcome-file-list><!-- 注册ServletContext监听器，创建容器对象，并且将ApplicationContext对象放到Application域中 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 指定spring核心配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><!-- 解决乱码的过滤器 --><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><!-- 防止Spring内存溢出的监听器 --><listener><listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class></listener><servlet><servlet-name>SpringMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 指定配置文件位置和名称 如果不设置,默认找/WEB-INF/<servlet-name>-servlet.xml --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>SpringMVC</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

效果展示

项目地址gitee：https://gitee.com/fengerwa/study-ssm