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SSM整合

  • 正常创建一个maven项目,环境是jDK1.8及以上,maven3.8及以上
  • 无论SSM项目、SpringBoot项目还是SpringCloud项目第一件事就是添加相关的依赖。这里是针对SSM整合导入相关的依赖
<?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.xsha.ssm</groupId>
    <artifactId>java-ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <!-- 对spring版本进行统一管理 -->
        <spring.version>5.2.6.RELEASE</spring.version>
        <!-- 对spring security版本进行统一管理 -->
        <spring.security.version>4.2.10.RELEASE</spring.security.version>
    </properties>

    <dependencies>
        <!-- Spring 依赖 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 数据库依赖 -->
        <!-- MySQL 驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
        </dependency>
        <!-- 数据源 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>
        <!-- MyBatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
        <!-- MyBatis 与 Spring 整合 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        <!-- MyBatis 分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.3.0</version>
        </dependency>
        <!-- 日志 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.7</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- JSTL 标签库 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- junit 测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <!-- 引入 Servlet 容器中相关依赖 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>
  • 刚创建的maven项目是没有web.xml文件的(如果有就更好,是在webapp/WEB-INF目录下哦),如果没有,就要按照如下步骤添加
    • 点击File->Project Structure->Facets

  • web.xml配置的内容基本上就是Servlet程序的三大组件:Listener监听器DispatcherServlet程序(控制器)Filter过滤器
<?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_4_0.xsd\"
         version=\"4.0\">
    <!-- 指定要加载的Spring配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoader</listener-class>
    </listener>
    <!-- 配置前端控制器 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!-- 配置字符编码过滤器 -->
    <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>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 配置允许前端delete、put、patch等请求的过滤器 -->
    <filter>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
  • 写到这里你肯定会发现有一个地方会报红,那就是缺少了Spring配置文件applicationContext.xml,其实applicationContext.xml配置文件
    就是Spring配置文件的一部分,因为Spring要与Mybatis整合,Spring配置文件一分为二,一部分是Spring与Mybatis整合的配置文件applicationContext.xml,一部分是
    Spring与SpringMvc的配置文件dispatcherServlet.xml

    • applicationContext.xml
    • 另外还需要在类路径下创建一个mapper的目录
<?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
\">
  <!-- 除了控制器的扫描,当前包下的都会扫描 -->
  <context:component-scan base-package=\"com.xsha.ssm\">
    <context:exclude-filter type=\"annotation\" expression=\"org.springframework.stereotype.Controller\"/>
  </context:component-scan>

  <!-- 引入外部配置文件 -->
  <context:property-placeholder location=\"classpath:jdbc.properties\" />

  <!-- Spring配置文件,这里主要配置和业务逻辑相关的 -->
  <!-- 数据源和事务控制 -->
  <bean id=\"dataSource\" class=\"com.alibaba.druid.pool.DruidDataSource\">
    <property name=\"driverClassName\" value=\"${jdbc.driverClassName}\" />
    <property name=\"url\" value=\"${jdbc.url}\" />
    <property name=\"username\" value=\"${jdbc.username}\" />
    <property name=\"password\" value=\"${jdbc.password}\" />
  </bean>

  <!-- 配置Spring与Mybatis的整合 -->
  <bean id=\"sqlSessionFactory\" class=\"org.mybatis.spring.SqlSessionFactoryBean\">
    <!-- 指定Mybatis全局配置文件 -->
    <property name=\"configLocation\" value=\"classpath:mybatisConfig.xml\" />
    <property name=\"dataSource\" ref=\"dataSource\" />
    <!-- 指定Mybatis的mapper.xml文件的位置 -->
    <property name=\"mapperLocations\" value=\"classpath:mapper/*.xml\"  />
  </bean>

  <!-- 配置扫描器,将Mybatis接口的实现加入到IOC容器中 -->
  <bean class=\"org.mybatis.spring.mapper.MapperScannerConfigurer\">
    <!-- 扫描所有dao(或者mapper)接口的实现类 -->
    <property name=\"basePackage\" value=\"com.xsha.ssm.mapper\" />
  </bean>

  <!-- 事务控制 -->
  <bean id=\"transactionManager\" class=\"org.springframework.jdbc.datasource.DataSourceTransactionManager\">
    <!-- 控制数据源 -->
    <property name=\"dataSource\" ref=\"dataSource\" />
  </bean>
  <!-- 开启基于注解的事务,使用xml配置形式的事务 -->
  <aop:config>
    <aop:pointcut id=\"txPoint\" expression=\"execution(* com.xsha.ssm.service.. *(..))\"/>
    <!-- 配置事务增强 -->
    <aop:advisor advice-ref=\"txAdvice\" pointcut-ref=\"txPoint\" />
  </aop:config>
  <!-- 配置事务增强,事务如何切入 -->
  <tx:advice id=\"txAdvice\">
    <tx:attributes>
      <!-- 所有方法都是事务方法 -->
      <tx:method name=\"*\" />
      <!-- 以get开头的方法 -->
      <tx:method name=\"get*\" read-only=\"true\" />
    </tx:attributes>
  </tx:advice>
</beans>
  • 这个配置配置文件的作用主要是Mybatis的全局配置,如实体类类型的别名、驼峰式命名
    • mybatisConfig.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>
  <settings>
    <setting name=\"mapUnderscoreToCamelCase\" value=\"true\"/>
  </settings>
  <!-- 设置类型别名 -->
  <typeAliases>
    <package name=\"com.xsha.ssm.entity\"/>
  </typeAliases>
</configuration>
  • 同样,上面还是缺少了一个配置文件,就是连接数据库的配置文件jdbc.properties
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///database_name?useUnicode=true&characterEncoding=utf8
jdbc.username=username
jdbc.password=password
  • 到这里,就已经实现了Spring和Mybatis的整合。接下来就是实现Spring和SpringMvc的整合,在上面的web.xml就基本配置完成Spring和SpringMvc的整合,
    就差一个视图解析器的配置文件dispatcherServlet.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
\">
  <!-- SpringMvc的配置文件,包括网站跳转逻辑控制 -->
  <context:component-scan base-package=\"com.xsha.ssm\" use-default-filters=\"false\">
    <!-- 只能扫描控制器 -->
    <context:include-filter type=\"annotation\" expression=\"org.springframework.stereotype.Controller\" />
  </context:component-scan>
  
  <!-- 配置视图解析器 -->
  <bean class=\"org.springframework.web.servlet.view.InternalResourceViewResolver\">
    <property name=\"prefix\" value=\"/WEB-INF/views\" />
    <property name=\"suffix\" value=\".jsp\" />
  </bean>
  
  <!-- 两个标准配置 -->
  <!-- 将SpringMvc不能处理的交割tomcat处理 -->
  <mvc:default-servlet-handler />
  <mvc:annotation-driven />
</beans>
  • SSM的整合已经实现,大家可通过单元测试

来源:https://www.cnblogs.com/aitiknowledge/p/16502012.html
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