1.新建maven的web项目

2.整合springMvc

2.1导入springMvc需要的jar包

  1.  <!-- spring mvc -->
  2.     <dependency>
  3.       <groupId>org.springframework</groupId>
  4.       <artifactId>spring-webmvc</artifactId>
  5.       <version>4.3.3.RELEASE</version>
  6.     </dependency>
  8.     <!-- spring4 -->
  9.     <dependency>
  10.       <groupId>org.springframework</groupId>
  11.       <artifactId>spring-core</artifactId>
  12.       <version>4.3.3.RELEASE</version>
  13.     </dependency>
  15.     <dependency>
  16.       <groupId>org.springframework</groupId>
  17.       <artifactId>spring-context</artifactId>
  18.       <version>4.3.3.RELEASE</version>
  19.     </dependency>
  21.     <dependency>
  22.       <groupId>org.springframework</groupId>
  23.       <artifactId>spring-jdbc</artifactId>
  24.       <version>4.3.3.RELEASE</version>
  25.     </dependency>
  27.     <dependency>
  28.       <groupId>org.aspectj</groupId>
  29.       <artifactId>aspectjweaver</artifactId>
  30.       <version>1.7.3</version>
  31.     </dependency>
  33.     <dependency>
  34.       <groupId>org.springframework</groupId>
  35.       <artifactId>spring-beans</artifactId>
  36.       <version>4.3.3.RELEASE</version>
  37.     </dependency>
  39.     <dependency>
  40.       <groupId>org.springframework</groupId>
  41.       <artifactId>spring-web</artifactId>
  42.       <version>4.3.3.RELEASE</version>
  43.     </dependency>
  45.     <dependency>
  46.       <groupId>org.springframework</groupId>
  47.       <artifactId>spring-expression</artifactId>
  48.       <version>4.3.3.RELEASE</version>
  49.     </dependency>
  51.     <dependency>
  52.       <groupId>org.springframework</groupId>
  53.       <artifactId>spring-orm</artifactId>
  54.       <version>4.3.3.RELEASE</version>
  55.     </dependency>
  57.     <dependency>
  58.       <groupId>org.springframework</groupId>
  59.       <artifactId>spring-test</artifactId>
  60.       <version>4.3.3.RELEASE</version>
  61.     </dependency>
  63.     <dependency>
  64.       <groupId>org.springframework</groupId>
  65.       <artifactId>spring-tx</artifactId>
  66.       <version>4.3.3.RELEASE</version>
  67.     </dependency>
  69.     <dependency>
  70.       <groupId>javax.servlet</groupId>
  71.       <artifactId>javax.servlet-api</artifactId>
  72.       <version>3.1.0</version>
  73.     </dependency>
  75.     <dependency>
  76.       <groupId>javax.servlet</groupId>
  77.       <artifactId>jstl</artifactId>
  78.       <version>1.2</version>
  79.     </dependency>

2.2 配置springMvc的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!-- springMvc 命名空间-->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc" 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/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">

    <!-- 扫描控制器-->
    <context:component-scan base-package="com.xxx.ssm.controller"></context:component-scan>

    <!-- 处理映射起-->
    <mvc:annotation-driven/>


    <!-- jsp配置视图解析器 -->
    <bean id="viewClass" name="viewClass" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>

        <!-- 页面路径 -->
        <property name="prefix" value="/WEB-INF/jsp/"></property>

        <!-- 页面后缀-->
        <property name="suffix" value=".jsp"></property>
    </bean>


    <!-- 让WEB-INF 静态资源可以对外访问-->
    <mvc:resources mapping="/js/**" location="/WEB-INF/js/"></mvc:resources>
    <mvc:resources mapping="/image/**" location="/WEB-INF/image/"></mvc:resources>
    <mvc:resources mapping="/css/**" location="/WEB-INF/css/"></mvc:resources>



</beans>

2.3配置web.xml

启动项目的时候加载springMvc配置。

  <!-- 配置springMvc 前端控制器-->

  <servlet>
    <servlet-name>springMvc</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>

    <!--启动tomcat加载 -->
    <load-on-startup>1</load-on-startup>

  </servlet>

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

3.配置spring

1.bean的管理
2.整合持久层用的mybatis
3.事物管理

3.1新建spring的配置文件

1.bean的管理

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

  <!--开启包扫描 -->
  <context:component-scan base-package="com.xxx.ssm"></context:component-scan>

  </beans>

2.整合mybatis

导入mybatis的jar，数据库驱动，spring整合mybatis专用包，数据库连接池

   <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.26</version>
    </dependency>

    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.7</version>
    </dependency>

    <!--整合mybatis 和spirng -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.6</version>
    </dependency>


3.配置mybatis的全局唯一文件

在resources新建mybatis目录，添加mybatis-config.xml

<?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>

    <!-- mybatis配置-->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

</configuration>

在mybatis目录下新建mappers目录。存放数据库表的mapper文件

4.在spring的配置文件中整合mybatis

参考：https://my.oschina.net/morgan412/blog/2998893

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!--开启包扫描 -->
    <context:component-scan base-package="com.xxx.ssm"></context:component-scan>

    <!-- 读取外部配置 加classpath 表示读的resources目录下面-->
    <context:property-placeholder location="classpath:config/db.properties"></context:property-placeholder>

    <!--配置数据库连接池 c3p0管理数据库的-->
    <bean id="c3p0" name="c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!-- 创建sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <!-- set注入数据源-->
        <property name="dataSource" ref="c3p0"></property>

        <!-- 读取mybatis全局唯一文件-->
        <property name="configLocation" value="classpath:/mybatis/mybatis-config.xml"></property>

        <!-- 读取mybatis所有mapper文件每个表xml-->
        <property name="mapperLocations" value="classpath:/mybatis/mappers/*.xml"></property>

    </bean>

    <!-- 创建sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>

    </bean>

    <!--扫描mapper层 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xxx.ssm.mapper"></property>
    </bean>



    <!--开启事物 -->
    <tx:annotation-driven/>

    <!--开启事物管理器-->
    <bean id="dataSourceTransactionManager" class=" org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="c3p0"></property>
    </bean>

</beans>


5.配置web的xml 加载spring的配置文件

  <!-- 加载spring-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springApplication.xml</param-value>
  </context-param>

  <!-- 配置spring的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

完整的webxml

<!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>


  <!-- 加载spring-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springApplication.xml</param-value>
  </context-param>

  <!-- 配置spring的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- 配置springMvc 前端控制器-->
  <servlet>
    <servlet-name>springMvc</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>

    <!--启动tomcat加载 -->
    <load-on-startup>1</load-on-startup>

  </servlet>

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


</web-app>

4. 不需要处理页面。配置对象和json的相互转换

4.1 导包

    <!-- 支持xml json 和对象的转换-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.6.0</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.6.0</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.6.0</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.jr</groupId>
      <artifactId>jackson-jr-all</artifactId>
      <version>2.6.0</version>
    </dependency>

4.2 配置springMvc.xml的配置

  <mvc:annotation-driven/>

或者

<!--转换json 注解适配器 -->
  <bean
    class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="messageConverters">
      <list>
        <bean
          class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
      </list>
    </property>
  </bean>

5.配置mybatis自动生成

5.1增加maven插件


    <plugins>

        <plugin>
          <groupId>org.mybatis.generator</groupId>
          <artifactId>mybatis-generator-maven-plugin</artifactId>
          <version>1.3.6</version>
          <configuration>
            <verbose>true</verbose>
            <overwrite>true</overwrite>
          </configuration>
        </plugin>

    </plugins>

5.2在resources增加generatorConfig.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>

    <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
    <classPathEntry  location="D:\work\maven-repository\mysql\mysql-connector-java\8.0.26\mysql-connector-java-8.0.26.jar"/>


    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>


        <!--数据库链接URL，用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/ssm?useUnicode=true&amp;characterEncoding=utf-8&amp;allowMultiQueries=true" userId="root" password="123456">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>


        <!-- 生成java bean的包名和位置-->
        <javaModelGenerator targetPackage="com.xxx.ssm.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成映射文件的包名和位置-->
        <sqlMapGenerator targetPackage="/mybatis/mappers" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>


        <!-- 生成mapper位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.xxx.ssm.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
        <table tableName="tb_menus" domainObjectName="MenuInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>

    </context>
</generatorConfiguration>