从零开始搭建java ssm项目

用IDEA来进行完整的ssm项目配置（多图）

1.选择create new project-->maven,把上面方的Crteate from archetype勾上后在列表选择org.apache.maven.archetypes:maven-archetype-webapp,然后点next

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2填上包名和artifactId名字（随便取），点next

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3.自行选择是否更改maven的本地仓库路径和配置文件路径（这里是默认的，没改），点finish

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4.上一步点了next后就到了主界面，这里IDEA会自动配置项目的artifact,左下角会出现一个弹窗，点inport changes

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5,此时的项目结构应该是这样的：

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6，在main下新建java和resources文件夹

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7.右键刚刚创建的java文件夹，选择make dictionary as->Sources root，同样地，对刚刚创建的resources文件夹选择make dictionary as-> resources root

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7.在java目录下创建相应的包，在resources目录下创建config,mapper文件夹，webapp下创建静态资源文件夹，WEB-INF下创建jsp文件夹，全部完成后的目录应该是这样的：

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可以看到对于不同的文件夹idea会给不同的图表，这也是IDEA的智能之处之一。

8 配置pox.xml添加相应的依赖，<dependency>内容如下(可以根据自己需要进行增减)：

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<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
      <dependency>
          <groupId>jspapi</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.0.public_draft</version>
      </dependency>
      <dependency>
          <groupId>servletapi</groupId>
          <artifactId>servlet-api</artifactId>
          <version>2.4-20040521</version>
      </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.5.4</version>
    </dependency>
    <dependency>
        <groupId>aopalliance</groupId>
        <artifactId>aopalliance</artifactId>
        <version>1.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-expression</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>asm</groupId>
        <artifactId>asm</artifactId>
        <version>20041228.180559</version>
    </dependency>
    <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>3.2.7</version>
    </dependency>
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>javassist</groupId>
        <artifactId>javassist</artifactId>
        <version>3.12.1.GA</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.25</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.25</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.25</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.6</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.12</version>
    </dependency>

9.接下来IDEA会自动更新项目依赖（取决于网速），右下角会有一个叫你更新配置的弹窗，点import changes即可，完后工程目录下的external libeary下会出现刚刚添加的依赖：

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10.在resources/config下创建applicationContext.xmlimage

创建好的applicationContext.xml是这样的，点左上角的configapplication context

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点create new application context弹出窗口后选OK

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11.用和第10步一模一样的方法在resources/config下创建springmvc.xml

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12.在resources/config下创建mybatis-config.xml，也就是mybatis的配置文件

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13.用和12一样的方法创建log4j.properties和db.properties，完成后resources的目录如下：

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14.至此，所有文件的创建完成，下面是resources目录下几个配置文件的内容：

db.properties:配置数据库参数

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jdbc.url=jdbc:mysql://localhost:3306/boot_crm?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT
jdbc.username=root
jdbc.password=123456
jdbc.maxTotal=30
jdbc.maxIdle=10
jdbc.initalSize=5
jdbc.driver=com.mysql.cj.jdbc.Driver

aplicationcontext.xml：spring的核心配置文件：

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<?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">


    <context:property-placeholder location="classpath:config/db.properties"/><!--配置配置文件的路径-->
    <!--配置数据源-->
    <bean id="dataSource"
          class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxTotal" value="${jdbc.maxTotal}"/><!--最大连接数-->
        <property name="maxIdle" value="${jdbc.maxIdle}"/><!--最大空闲数-->
        <property name="initialSize" value="${jdbc.initalSize}"/><!--初始连接数-->
    </bean>
    <!--配置mybatis会话工厂-->
    <bean id="sqlSessionFactory"
          class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:config/mybatis-config.xml"/>
    </bean>
    <!--配置mapper扫描器·-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.agno3.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <!--配置Service扫描器-->
   <context:component-scan base-package="com.agno3"/>
</beans>

springmvc.xml：spring的核心配置文件：

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<?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: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">


    <context:component-scan base-package="com.agno3.controller"/><!--controller扫描器-->
    <mvc:annotation-driven/><!--注解驱动-->
    <!--静态资源访问映射 （不被拦截器拦截）-->
    <mvc:resources mapping="/js/**" location="/js/"/>
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/images/**" location="/images/"/>
    <mvc:resources mapping="/fonts/**" location="/fonts/"/>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!--配置视图解析器的前后缀-->
        <property name="suffix"  value=".jsp"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
    </bean>
</beans>

mybatis-config.xml：mybatis的配置文件

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<?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>
    <!--这里的培植信息不用了（在spring的培植文件里面）-->
</configuration>

15.最后就是在web.xml中配置全局拦截器：

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<!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>


  <!--配置Spring文件监听器-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:/config/applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--spring-mvc 的拦截器-->
  <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:config/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <!--拦截所有请求-->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

至此整个ssm框架就搭建完成了23333.