3.ssm整合配置

Posted 2021-08-18 小马Mark

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SSM 编程，即 SpringMVC + Spring + MyBatis 整合，是当前最为流行的 JavaEE 开发技术架构。其实 SSM 整合的实质，仅仅就是将 MyBatis整合入 Spring。因为 SpringMVC原本就是 Spring的一部分，不用专门整合。

SSM 整合的实现方式可分为两种：基于 XML 配置方式，基于注解方式。

新建web工程

略

maven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.maj</groupId>
  <artifactId>springmvc05-ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <properties>
    <!-- 在idea用maven来test在控制台打印的信息不乱码 -->
    <argLine>-Dfile.encoding=UTF-8</argLine>
    <!-- 源码编译 jdk 版本 -->
    <maven.compiler.source>1.8</maven.compiler.source>
    <!-- 运行代码的 jdk 版本 -->
    <maven.compiler.target>1.8</maven.compiler.target>
    <!-- 项目构建使用的编码，避免中文乱码-->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!-- 生成报告的编码-->
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!--servlet依赖-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- jsp依赖 -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2.1-b03</version>
      <scope>provided</scope>
    </dependency>
    <!--springmvc依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <!--spring事务相关依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <!--Jackson依赖-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>
    <!--spring整合mybatis依赖-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!--mybatis依赖-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.1</version>
    </dependency>
    <!--mysql驱动依赖-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.9</version>
    </dependency>
    <!--druid连接池依赖-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.12</version>
    </dependency>

  </dependencies>

  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory><!--所在的目录-->
        <includes><!--包括目录下的.properties,.xml 文件都会扫描到-->
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <!-- filtering 选项 false 不启用过滤器， *.property 已经起到过滤的作用了 -->
        <filtering>false</filtering>
      </resource>
    </resources>

    <!-- 配置插件 -->
    <plugins>
      <!-- 配置具体插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <!-- 插件名称 -->
        <artifactId>maven-compiler-plugin</artifactId>
        <!-- 插件版本 -->
        <version>3.8.1</version>
        <!-- 配置插件的信息 -->
        <configuration>
          <!-- 代码在jdk1.8上编译的 -->
          <source>1.8</source>
          <!-- 需要在jdk1.8上运行 -->
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

定义包的结构

编写web.xml文件

<?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">
    
	<!--注册中央调度器-->
    <servlet>
        <servlet-name>myWeb</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:conf/dispatcherServlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>myWeb</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--注册监听器-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:conf/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>


    <!--设置utf-8编码-->
    <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>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

编写配置文件

jdbc.properties

jdbc.url=jdbc:mysql://localhost:3306/springdb
jdbc.username=root
jdbc.password=maj6226543

dispatcherServlet.xml

springMVC配置文件

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

    <!--扫描注解@Controller-->
    <context:component-scan base-package="com.maj.controller" />

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!--声明注解驱动-->
    <mvc:annotation-driven />

    <!--加载静态资源-->
    <mvc:resources mapping="/static/**" location="/static/" />
</beans>

applicationContext.xml

spring配置文件

<?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 https://www.springframework.org/schema/context/spring-context.xsd">
    <!--spring配置文件：声明service，dao，工具类等对象-->

    <!--加载读取properties配置文件-->
    <context:property-placeholder location="classpath:conf/jdbc.properties" />
    <!--声明数据源，连接数据库-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close" >
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}" />
    </bean>

    <!--声明SqlSessionFactoryBean创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:conf/mybatis.xml" />
    </bean>
    <!--声明mybatis扫描器对象，用来创建dao对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <property name="basePackage" value="com.maj.dao" />
    </bean>

    <!--声明service注解@Service所在的包名位置-->
    <context:component-scan base-package="com.maj.service" />

    <!--事务配置：注解的配置或者aspectJ的配置-->

</beans>

mybatis.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="logImpl" value="STDOUT_LOGGING"/>
    </settings>

        <typeAliases>
    <!--        <typeAlias type="com.maj.domain.Account" alias="acc" />-->

            <package name="com.maj.domain"/>
        </typeAliases>

    <mappers>
<!--        <mapper resource="com/xxx/xxxDao.xml"/>-->
        <package name="com.maj.dao" />
    </mappers>
</configuration>

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