【SSM进阶学习系列丨整合篇】Spring+SpringMVC+MyBatis 框架配置详解

Posted on by hackdl

文章目录

  • 一、环境准备
    • 1.1、创建数据库和表
    • 1.2、导入框架依赖的jar包
    • 1.3、修改Maven的编译版本
    • 1.4、完善Maven目录
    • 1.5、编写项目需要的包
    • 1.6、编写实体、Mapper、Service
  • 二、配置MyBatis环境
    • 2.1、配置mybatis的主配置文件
    • 2.2、编写映射文件
    • 2.3、测试环境是否正确
  • 三、配置Spring环境
    • 3.1、编写主配置文件
    • 3.2、测试Spring环境是否正确
  • 四、Spring整合MyBaits框架
    • 4.1、定义数据库配置
    • 4.2、主配置文件中引入properties配置文件
    • 4.3、注册数据源
    • 4.4、定义事务管理器
    • 4.5、开启事务的注解驱动支持
    • 4.6、配置SqlSessionFactoryBean
    • 4.7、配置自动扫描所有 Mapper 接口和文件
    • 4.8、测试
  • 五、配置SpringMVC环境
    • 5.1、主配置文件
    • 5.2、web.xml配置前端控制器
  • 六、Spring集成SpringMVC环境

一、环境准备

1.1、创建数据库和表

create database ssm;

use ssm;

create table t_account(
	id int primary key auto_increment,
  	name varchar(30),
  	age int,
  	balance int
);

insert into t_account values(default,'HelloWorld',23,100);

1.2、导入框架依赖的jar包

​ 由于我们整合的是SpringMVC、Spring和MyBatis，所以需要将这三个框架所需要的jar包导入到项目中。注意：由于要连接数据库，所以仍需要数据库驱动包。

​ 注意：MyBatis框架和Spring框架整合需要一个mybatis-spring的jar包，该jar包的作用是两个框架的转换包。

dependencies>
   
   dependency>
       groupId>org.mybatisgroupId>
       artifactId>mybatisartifactId>
       version>3.5.3version>
   dependency>

   
   dependency>
      	groupId>mysqlgroupId>
        artifactId>mysql-connector-javaartifactId>
        version>5.1.6version>
   dependency>
  
  	
    dependency>
       	groupId>org.springframeworkgroupId>
        artifactId>spring-contextartifactId>
        version>5.2.1.RELEASEversion>
    dependency>

    
    dependency>
        groupId>org.aspectjgroupId>
        artifactId>aspectjweaverartifactId>
        version>1.9.4version>
    dependency>

    
    dependency>
        groupId>org.springframeworkgroupId>
        artifactId>spring-txartifactId>
        version>5.2.1.RELEASEversion>
    dependency>
  
   	
    dependency>
      groupId>org.springframeworkgroupId>
      artifactId>spring-jdbcartifactId>
      version>5.2.1.RELEASEversion>
    dependency>
  
  	
  	dependency>
      groupId>org.springframeworkgroupId>
      artifactId>spring-webartifactId>
      version>5.2.1.RELEASEversion>
    dependency>

    
    dependency>
      groupId>org.springframeworkgroupId>
      artifactId>spring-webmvcartifactId>
      version>5.2.1.RELEASEversion>
    dependency>
  	
  	
    dependency>
      groupId>com.fasterxml.jackson.coregroupId>
      artifactId>jackson-coreartifactId>
      version>2.9.5version>
    dependency>
    dependency>
      groupId>com.fasterxml.jackson.coregroupId>
      artifactId>jackson-annotationsartifactId>
      version>2.9.5version>
    dependency>
    dependency>
      groupId>com.fasterxml.jackson.coregroupId>
      artifactId>jackson-databindartifactId>
      version>2.9.5version>
    dependency>
  
  	
    dependency>
          groupId>javax.servletgroupId>
          artifactId>javax.servlet-apiartifactId>
          version>3.1.0version>
          scope>providedscope>
    dependency>
  
  	
  	dependency>
      groupId>javax.servletgroupId>
      artifactId>jstlartifactId>
      version>1.2version>
    dependency>
  
  	
    dependency>
      groupId>commons-fileuploadgroupId>
      artifactId>commons-fileuploadartifactId>
      version>1.3.1version>
    dependency>
    dependency>
      groupId>commons-iogroupId>
      artifactId>commons-ioartifactId>
      version>2.4version>
  	dependency>
	
  	 
     dependency>
        groupId>log4jgroupId>
        artifactId>log4jartifactId>
        version>1.2.17version>
     dependency>
  
  	
    dependency>
        groupId>org.springframeworkgroupId>
        artifactId>spring-testartifactId>
        version>5.2.1.RELEASEversion>
        scope>testscope>
    dependency>
  
  	
    dependency>
        groupId>junitgroupId>
        artifactId>junitartifactId>
        version>4.12version>
        scope>testscope>
    dependency>
  
	
    dependency>
        groupId>org.mybatisgroupId>
        artifactId>mybatis-springartifactId>
        version>2.0.3version>
    dependency>
  
  	
  	dependency>
      groupId>com.alibabagroupId>
      artifactId>druidartifactId>
      version>1.1.21version>
    dependency>
dependencies>

1.3、修改Maven的编译版本

properties>
    project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    maven.compiler.source>1.8maven.compiler.source>
    maven.compiler.target>1.8maven.compiler.target>
properties>

1.4、完善Maven目录

1.5、编写项目需要的包

cn.bdqn.domain
cn.bdqn.mapper
cn.bdqn.service
cn.bdqn.controller
cn.bdqn.utils
cn.bdqn.exception

1.6、编写实体、Mapper、Service

public class Account {        
                              
    private int id;           
                              
    private String name;      
                              
    private Integer age;      
                              
    private Integer balance; 

	// 生成get和set方法、toString方法
}

public interface AccountMapper {
    
    // 查询所有的账号
    public ListAccount> selectAll();
 
    // 保存账号
    public void insert(Account account);
}

public interface AccountService {

    // 查询所有账号
    public ListAccount> queryAll();

    // 保存账号
    public void save(Account account);
}

public class AccountServiceImpl implements AccountService {

    // 查询全部账号
    public ListAccount> queryAll() {

        System.out.println("查询全部账号");
        return null;
    }

    // 保存账号
    public void save(Account account) {
        System.out.println("保存账号");
    }
}

二、配置MyBatis环境

2.1、配置mybatis的主配置文件

​ 主配置文件：mybaits-config.xml.


DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">

configuration>
    typeAliases>
        
        package name="cn.bdqn.domain"/>
    typeAliases>

    
    environments default="mysql">
        
        environment id="mysql">
            
            transactionManager type="JDBC">transactionManager>
            
            dataSource type="POOLED">
                
                property name="driver" value="com.mysql.jdbc.Driver"/>
                property name="url" value="jdbc:mysql:///ssm?allowMultiQueries=true"/>
                property name="username" value="root"/>
                property name="password" value="1234567"/>
            dataSource>
        environment>
    environments>

    mappers>
        package name="cn.bdqn.mapper"/>
    mappers>

configuration>

2.2、编写映射文件

​ 在resources目录下新建与mapper接口同名的目录。即：cn/bdqn/mapper


DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
mapper namespace="cn.bdqn.mapper.AccountMapper">

    
    select id="selectAll" resultType="cn.bdqn.domain.Account">
        select
            id,name,age,balance
        from
            t_account
    select>
    
    
    insert id="insert">
        insert into t_account(name,age,balance) values (#{name},#{age},#{balance})
    insert>
    
mapper>

2.3、测试环境是否正确

    @Test
    public void testMyBatis() throws Exception{
        InputStream is = Resources.getResourceAsStream("mybatis-config.xml");

        SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(is);

        SqlSession session = ssf.openSession();

        AccountMapper accountMapper = session.getMapper(AccountMapper.class);
        ListAccount> accounts = accountMapper.selectAll();
        System.out.println(accounts);

        is.close();
        session.close();
    }

三、配置Spring环境

3.1、编写主配置文件

​ 注意：由于是SSM项目整合，在Spring主配置文件中配置扫描包的时候仅仅针对Service业务层、Mapper持久化层等注解的扫描，对于Web层，交由SpringMVC框架去处理。

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
        https://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/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
		
 	    
    context:component-scan base-package="cn.bdqn">
        context:exclude-filter	type="annotation" 																			expression="org.springframework.stereotype.Controller"/>
    context:component-scan>
beans>

3.2、测试Spring环境是否正确

    @Test
    public void testSpring() throws Exception{

        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml");

        AccountService accountService = (AccountService) ac.getBean("accountService");

        System.out.println(accountService);
    }

四、Spring整合MyBaits框架

​ 注意：我们在配置MyBaits环境的时候，数据源配置在了MyBatis上，现在由于Spring整合MyBaits，则对于在MyBatis中配置的数据源要交给Spring去管理。在这里，我们用的阿里巴巴的数据源。

​ 官网

4.1、定义数据库配置

​ 定义db.properties数据库配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///ssm?allowMultiQueries=true
jdbc.username=root
jdbc.password=1234567

4.2、主配置文件中引入properties配置文件

context:property-placeholder location="classpath:db.properties"/>

4.3、注册数据源

bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" 
      init-method="init" destroy-method="close">
        property name="driverClassName" value="${jdbc.driver}"/>
        property name="url" value="${jdbc.url}"/>
        property name="username" value="${jdbc.username}"/>
        property name="password" value="${jdbc.password}"/>
bean>

4.4、定义事务管理器

bean id="transactionManager" 																	  class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    property name="dataSource" ref="dataSource"/>
bean>

4.5、开启事务的注解驱动支持

tx:annotation-driven transaction-manager="transactionManager"/>

4.6、配置SqlSessionFactoryBean


bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  	property name="dataSource" ref="dataSource" />
bean>

4.7、配置自动扫描所有 Mapper 接口和文件


bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    property name="basePackage" value="cn.bdqn.mapper"/>
bean>

4.8、测试

    @Test
    public void testSpringAndMyBatis() throws Exception{
        ApplicationContext ac =  new ClassPathXmlApplicationContext("beans.xml");

        AccountService accountService = (AccountService) ac.getBean("accountService");

        ListAccount> accounts = accountService.queryAll();

        System.out.println(accounts);
    }

五、配置SpringMVC环境

5.1、主配置文件


beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mv="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    
    context:component-scan base-package="cn.bdqn" use-default-filters="false">
        context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    context:component-scan>

    
    bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        property name="prefix" value="/WEB-INF/jsp/"/>
        property name="suffix" value=".jsp"/>
    bean>

    mvc:annotation-driven/>
beans>

5.2、web.xml配置前端控制器


web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

  servlet>
    servlet-name>frontDispatcherServletservlet-name>
    servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    init-param>
      param-name>contextConfigLocationparam-name>
      param-value>classpath:SpringMVC.xmlparam-value>
    init-param>
    load-on-startup>1load-on-startup>
  servlet>

  servlet-mapping>
    servlet-name>frontDispatcherServletservlet-name>
    url-pattern>/url-pattern>
  servlet-mapping>
web-app>

六、Spring集成SpringMVC环境

​ 在web.xml文件中配置。


listener>
    listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>


context-param>
    param-name>contextConfigLocationparam-name>
    param-value>classpath:beans.xmlparam-value>
context-param>

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