idea配置SSM框架--maven

SSM框架（Spring，SpringMVC，Mybatis），今天重新搭建了一个Demo，来分享如何一步步在MAC OS下用IDEA搭建一个SSM项目。

一.开发环境

JDK 1.8

IDEA 2017.1

Tomcat 9.0.0.M21

Maven 3.5.0

MySql 5.7.18

以上的安装配置可以参考网上的教程。环境准备就绪，接下来开始新建Maven Web项目

二.创建Maven Web项目

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点击Finish，第一次搭建可能会很慢，甚至可能需要VPN才能搭建成功

三.搭建目录结构

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三.搭建目录结构

四.配置文件内容
1.配置pom.xml

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.jacky</groupId>
    <artifactId>foxi</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>foxi Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <!-- Spring版本号 -->
        <spring.version>4.3.8.RELEASE</spring.version>
    </properties>
    <dependencies>
        <!-- Spring相关包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- AOP相关包 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.0</version>
        </dependency>

        <!-- MyBatis相关包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.3.0</version>
        </dependency>
        <!-- MySQL相关包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.26</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.20</version>
        </dependency>

        <!-- Spring集成MyBatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.3</version>
        </dependency>

        <!-- JSP标准标签库 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- 日志相关包 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>

        <!-- 单元测试相关包 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <!-- JSON包 -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20180130</version>
        </dependency>
        <!-- 文件上传所依赖的jar包 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- 阿里云OSS对象存储 -->
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
            <version>2.8.3</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>foxi</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2.配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    version="3.1" metadata-complete="true">
    <!-- 配置Spring环境 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 配置SpringMVC环境 -->
    <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:spring-mvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

3.配置spring-tx

?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 开启AOP注解扫描 -->
    <aop:aspectj-autoproxy proxy-target-class="true" />

    <!-- 事务管理器，依赖于数据源 -->
    <bean id="txManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 编写通知：对事务进行增强（通知），需要编写对切入点和具体执行事务细节 -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <!-- 为切入点方法添加事务详情 name：方法名，*表示任意方法名称 propagation：设置传播行为 isolation：设置隔离级别 
                read-only：是否只读 -->
            <tx:method name="add*" propagation="REQUIRED"
                isolation="DEFAULT" read-only="false" rollback-for="Exception" />
            <tx:method name="delete*" propagation="REQUIRED"
                isolation="DEFAULT" read-only="false" rollback-for="Exception" />
            <tx:method name="update*" propagation="REQUIRED"
                isolation="DEFAULT" read-only="false" rollback-for="Exception" />
        </tx:attributes>
    </tx:advice>

    <!-- 设置AOP，让Spring自动对目标生成代理，需要使用AspectJ表达式 -->
    <aop:config proxy-target-class="true">
        <!-- 切面：整合切入点和通知 -->
        <aop:advisor advice-ref="txAdvice"
            pointcut="within(com.jacky.foxi.controller..*)" />
    </aop:config>
</beans>

4.配置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/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
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <context:property-placeholder
        location="classpath:wx.properties" />

    <!-- 启动自动扫描 -->
    <context:component-scan
        base-package="com.jacky.foxi.*" />

    <!-- 注册MVC注解驱动 -->
    <mvc:annotation-driven />

    <!-- 静态资源可访问的设置方式 -->
    <mvc:default-servlet-handler />

    <!--200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="209715200" />
        <property name="defaultEncoding" value="UTF-8" />
        <property name="resolveLazily" value="true" />
    </bean>


    <!-- 配置视图解析器，可以显式设置，也可以不设置，不设置会依据SpringMVC的默认设置 -->
    <!-- <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
        <property name="prefix" value="/" /> <property name="suffix" value=".jsp" 
        /> </bean> -->
</beans>

5.配置spring-mybatis.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"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 定义数据源Bean -->
    <!-- Druid -->
    <bean id="dataSource"
        class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="jdbc:mysql://120.79.146.83:3306/foxi" />
        <property name="username" value="root" />
        <property name="password" value="cjacky3795391." />
    </bean>

    <!-- 注册SqlSessionFactoryBean -->
    <bean id="sqlSessionFactory"
        class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mappers.xml文件 -->
        <property name="mapperLocations"
            value="classpath:com/jacky/foxi/mapper/*.xml" />
        <property name="configLocation"
            value="classpath:mybatis-config.xml"></property>
    </bean>

    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.jacky.foxi.dao" />
        <property name="sqlSessionFactoryBeanName"
            value="sqlSessionFactory" />
    </bean>
</beans>

6.配置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>
    <!-- 设置别名 -->
    <typeAliases>
        <package name="com.jacky.foxi.entity" />
    </typeAliases>
</configuration>

五.配置一个tomcat：

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右边是输入项目名的地方，最后访问需要用到。

image
WechatIMG1.jpeg

六,思路图

1. 首先浏览器上访问路径 /listUser

2. tomcat根据web.xml上的配置信息，拦截到了/listUser，并将其交由DispatcherServlet处理。

3. DispatcherServlet 根据springMVC的配置，将这次请求交由UserController类进行处理，所以需要进行这个类的实例化

4. 在实例化UserController的时候，注入UserServiceImpl。 (自动装配实现了UserService接口的的实例，只有UserServiceImpl实现了UserService接口，所以就会注入UserServiceImpl)

5. 在实例化UserServiceImpl的时候，又注入UserMapper

6. 根据ApplicationContext.xml中的配置信息，将UserMapper和User.xml关联起来了。

7. 这样拿到了实例化好了的UserController,并调用 list 方法

8. 在listUser方法中，访问UserService,并获取数据，并把数据放在"cs"上，接着服务端跳转到listUser.jsp去

9. 最后在listUser.jsp 中显示数据

image

源代码：https://github.com/laojiang308/ssm-2018.git
请求 -->> controller -->> service(业务处理操作Dao) -->>mapper的xml文件映射数据库(entity实体)与数据库表