前言

SSM整合可以使用多种方式，咱们选择XML + 注解的方式，不要觉得不妥，这样其实最便捷-

提示：以下是本篇文章正文内容，下面案例可供参考

1.新建项目

1.1：使用Macenwebapp \Rightarrow webapp

1.2：导入项目依赖(pom.xml)， <build>由创建自动生成

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.Lsy</groupId>
  <artifactId>ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!--用来实现单元测试的jar包-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- java连接mysql的jar包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.13</version>
    </dependency>
    <!-- servlet-api的jar包 -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- 使用jsp得使用的jar包 -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.2.1</version>
      <scope>provided</scope>
    </dependency>
    <!-- 给springmvc返回json数据做准备的 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.47</version>
    </dependency>
    <!-- 想要用el表达式得有这个jar包 -->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <!-- jstl得jar包 -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.1.2</version>
    </dependency>
    <!-- 简化实体类代码 -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.16.22</version>
    </dependency>
    <!-- spring连接数据源需要使用得jar包 -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
    <!-- mybatis使用得jar包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <!-- spring切面技术需要用到得jar -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- 提供切面支持得 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring-beans  -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring得上下文运行环境 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- 给spring运行环境提供支持得包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring核心工具 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring表达式 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring-jdbc连接数据库得 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- spring提供得事务管理器 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- springmvc得开发web必须得包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- 提供springmvc web支持得包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.3.RELEASE</version>
    </dependency>
    <!-- mybatis整合spring必须得包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
    <!-- 日志 -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/aopalliance/aopalliance -->
    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>1.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.13</version>
    </dependency>
    <dependency>
      <groupId>org.testng</groupId>
      <artifactId>testng</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpmime</artifactId>
      <version>4.3.2</version>
    </dependency>

    <!--用来实现mybatis分页的代码-->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>5.1.2</version>
    </dependency>

    <!--hutool工具类-->
    <dependency>
      <groupId>cn.hutool</groupId>
      <artifactId>hutool-all</artifactId>
      <version>5.3.6</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>8</source>
          <target>8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

2.新建项目的文件夹

手动创建(java、resources),以及子包entity,mapper. . 具体如下

3.从web.xml入手

注意事项：

3.1:加载spring.xml文件

3.2:乱码过滤器

3.3:监听器,加载spring的配置文件,applicationContext.xml，如果没有配置监听器，那么spring的配置文件只能放在webapp包下

3.4:加载springmvc.xml文件(优先加载)

下面是webxml文件代码：

<!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>


    <!--先配置spring (优先加载)-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext.xml</param-value>
    </context-param>

    <!--配置过滤器，解决POST乱码问题-->
    <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>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--配置监听器:监听整个web项目的文件以及内容变化-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!--配置SpringMVC分发器，拦截所有请求-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:springmvc.xml</param-value>
        </init-param>
    </servlet>

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

    <!--&lt;!&ndash; 设置默认的访问首页 &ndash;&gt;-->
    <!--<welcome-file-list>-->
        <!--<welcome-file>/selAll</welcome-file>-->
    <!--</welcome-file-list>-->
</web-app>

4.配置applicationContext.xml文件

4.1:配置数据源

4.2:配置sqlsessionFactoryBean(数据源, mapper.xml位置, mybaits配置文件的位置，别名)

4.3:扫描Mapper接口(@Mapper)

4.4:扫描dao以及service的包

代码报错也可能是顺序的问题，这里也得注意一下

<?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/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">

    <!--1.引用数据源的属性文件-->
    <!--
        读取 db.properties 中的内容
        property-placeholder: 占位符
        location： 属性文件的位置
    -->
    <!--<context:property-placeholder location="classpath:db.properties"/>-->
    <bean id="propertyPlaceholderConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations" value="classpath:db.properties"></property>
    </bean>

    <!--2.配置数据源-->
    <!--获得数据库连接池对象，并交由 spring 统一管理 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${driverClassName}"></property>
        <property name="url" value="${url}"></property>
        <property name="username" value="${username}"></property>
        <property name="password" value="${password}"></property>
    </bean>
    
    <!--3.通过数据源获取SqlSessionFactory对象-->
    <!--创建对象的过程都要交给spring的ioc进行管理-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--指定sqlSessionFactory引用的数据源-->
        <property name="dataSource" ref="dataSource"></property>

        <!--<property name="typeAliasesPackage" value="com.changan.entity"></property>-->
        <!--指定mapper.xml的位置-->
        <property name="mapperLocations" value="classpath:/mapper/*Mapper.xml"></property>

        <!--别名-->
        <property name="typeAliasesPackage" value="com.Lsy.entity"></property>

        <!--mybatis的配置也需要交给spring容器进行管理-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!--4.扫描所有的mapper并且注入到ioc容器-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.Lsy.mapper"></property>
    </bean>

    <!--5.扫包    扫描所有的注解-->
    <context:component-scan base-package="com.Lsy.mapper,com.Lsy.service"></context:component-scan>

</beans>

里面用到一个db.properties配置数据库连接属性的文件…代码奉上：

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?characterEncoding=UTF-8&useUnicode=true&serverTimezone=GMT%2B8
username=root
password=root

5.配置springmvc.xml文件

5.1:扫包

5.2:注解驱动(能够让程序识别springmvc的注解@RequestMapping() )

5.3:视图解析器

细心的同学可以发现pringmvc.xml文件里面的扫包applicationContext.xml文件里面也有，其实两者取一即可，但是也不会冲突，这里做个小提醒

<?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/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">


    <!--1.扫包-->
    <context:component-scan base-package="com.Lsy.controller"></context:component-scan>
    <!--2.注解驱动-->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!--3.视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

6.总结

以上是SSM完整配置文件，往后就可以直接写dao层，service……整个配置文件下来的确是挺繁琐，感兴趣的同学可以往后深入研究，以后的springboot相对来说就减去了大部分繁琐的流程，OK ,能够坚持到这里的各位都是人才，说话又好听，敲的代码又好看，我超喜欢你们，所以，我要是哪里写错了，欢迎指出，还望不吝赐教！！！

7.源码、源码、源码~

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SSM整合完整配置文件，详细思路+附带源码（看完上手直接用）

前言