前面我们已经把SSM的三个部分讲完了，现在我们来整合这三个部分

文章目录

SSM 整合

SSM 整合

整合说明：SSM整合可以使用多种方式，咱们会选择XML + 注解的方式
整合的思路：
- 先搭建整合的环境
- 先把Spring的配置搭建完成
- 再使用Spring整合SpringMVC框架
- 最后使用Spring整合MyBatis框架
如下图：

总得来说，一定是Spring框架来整合其他两个框架

搭建整合环境

创建数据库和表结构：

create database ssmtotal; 
use ssmtotal; 
create table account( 
	id int primary key auto_increment, 
	name varchar(20), 
	money double 
);

创建maven的工程ssm_total

创建过程可以去看看我的这篇文章

在pom.xml文件中引入坐标依赖

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <!-- Spring 版本 -->
        <spring.version>5.0.2.RELEASE</spring.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mysql.version>8.0.20</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
    </properties>

<dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</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-test</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <!-- log end -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
    </dependencies>

编写Account实体类

/**
 * @Author: zhang
 * @Descripetion: 账户实体类
 **/
public class Account implements Serializable {
    
    

    private Integer id;
    private String name;
    private Double money;

    public Integer getId() {
    
    
        return id;
    }

    public void setId(Integer id) {
    
    
        this.id = id;
    }

    public String getName() {
    
    
        return name;
    }

    public void setName(String name) {
    
    
        this.name = name;
    }

    public Double getMoney() {
    
    
        return money;
    }

    public void setMoney(Double money) {
    
    
        this.money = money;
    }

    @Override
    public String toString() {
    
    
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

编写账户持久层dao接口

/**
 * @Author: zhang
 * @Date: 2021/2/21 - 12:54
 * @Descripetion: 账户持久层接口
 **/
public interface IAccountDao {
    
    

    //查询所有
    public List<Account> findAll();

    //保存账户信息
    public void saveAccount(Account account);
}

编写业务层service接口和实现类

/**
 * @Author: zhang
 * @Descripetion: 账户的业务层
 **/
public interface IAccountService {
    
    

    //查询所有
    public List<Account> findAll();

    //保存账户信息
    public void saveAccount(Account account);
}

/**
 * @Author: zhang
 * @Descripetion: 账户实现类
 **/
public class AccountServiceImpl implements IAccountService {
    
    

    @Override
    public List<Account> findAll() {
    
    
        System.out.println("业务层：查询所有账户...");
        return null;
    }

    @Override
    public void saveAccount(Account account) {
    
    
        System.out.println("业务层：保存账户...");

    }
}

以上就是环境的搭建了

Spring框架代码的编写

编写 spring 配置文件applicationContext.xml并导入约束

<?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">

    <!--开启注解的扫描，希望处理service和dao，controller不需要Spring框架去处理-->
    <context:component-scan base-package="com.cz" >
        <!--配置哪些注解不扫描,制定扫包规则，不扫描 @Controller 注解的 JAVA 类，其他的还是要扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

使用注解配置业务层和持久层

@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    
    

		//......
}

测试类

/**
 * @Author: zhang
 * @Descripetion: 测试类
 **/
public class TestSpring {
    
    

    @Test
    public void test1(){
    
    
        //加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //获取对象
        IAccountService as = (IAccountService) ac.getBean("accountService");
        //执行方法
        as.findAll();
    }
}

运行结果：

Spring整合SpringMVC框架

搭建和测试SpringMVC的开发环境

在web.xml中配置DispatcherServlet前端控制器和过滤器解决中文乱码

<!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>

  <!--解决中文乱码的过滤器-->
  <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>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <!--配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载springmvc.xml配置文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <!--启动服务器，创建该servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

创建springmvc.xml的配置文件，编写配置文件

<?xml version="1.0" encoding="UTF-8"?>
<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"
       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">

    <!--开启注解扫描，只扫描Controller注解-->
    <context:component-scan base-package="com.cz">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--配置的视图解析器对象-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    
    <!--过滤静态资源-->
    <mvc:resources location="/css/" mapping="/css/**" />
    <mvc:resources location="/images/" mapping="/images/**" />
    <mvc:resources location="/js/" mapping="/js/**" />

    <!--开启SpringMVC注解的支持-->
    <mvc:annotation-driven/>
</beans>

测试SpringMVC的框架搭建是否成功
- 编写index.jsp和list.jsp

<a href="account/findAll">测试查询所有</a>

创建AccountController控制器类，编写方法，进行测试

@Controller
@RequestMapping("/account")
public class AccountController {
    
    

    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(){
    
    
        System.out.println("表现层：查询所有账户信息...");
        return "list";
    }
}

Spring整合SpringMVC的框架

在这里插入图片描述

目的：在controller中能成功的调用service对象中的方法。
所以在项目启动的时候，就去加载applicationContext.xml的配置文件，在web.xml中配置ContextLoaderListener监听器（该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文件）。

<!--配置Spring的监听器，默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

在controller中注入service对象，调用service对象的方法进行测试

@Controller
@RequestMapping("/account")
public class AccountController {
    
    

    @Autowired
    private IAccountService accountService;

    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(){
    
    
        System.out.println("表现层：查询所有账户信息...");
        //调用service方法
        accountService.findAll();
        return "list";
    }
}

运行结果：
浏览器点击超链接之后，在控制台的输出如下：

Spring整合MyBatis框架

搭建和测试MyBatis的环境

在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件

<?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">
<!--MyBatis的主配置文件-->
<configuration>
    <!--  配置环境  -->
    <environments default="mysql">
        <!-- 配置MySQL的环境 -->
        <environment id="mysql">
            <!-- 配置事务类型 -->
            <transactionManager type="JDBC"></transactionManager>
            <!-- 配置数据源（连接池） -->
            <dataSource type="POOLED">
                <!-- 配置数据库的基本信息 -->
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/ssmtotal?serverTimezone=UTC&amp;characterEncoding=utf-8"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            </dataSource>
        </environment>
    </environments>

    <!--  指定映射配置文件的位置，映射配置文件指的是每个Dao独立配置的文件  -->
    <mappers>
        <!-- 该包下所有的dao接口都可以使用 -->
        <package name="com.cz.dao"/>
    </mappers>
</configuration>

在IAccountDao接口的方法上添加注解，编写SQL语句

public interface IAccountDao {
    
    

    /**
     * 查询所有
     * @return
     */
    @Select("select * from account")
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    @Insert("insert into account (name,money) values(#{name},#{money})")
    public void saveAccount(Account account);
}

编写测试的方法

/**
 * @Author: zhang
 * @Descripetion: 测试TestMybatis
 **/
public class TestMybatis {
    
    

    @Test
    public void testMybatis() throws Exception{
    
    
        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建工厂
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建sqlSession对象
        SqlSession session = factory.openSession();
        // 获取代理对象
        IAccountDao accountDao = session.getMapper(IAccountDao.class);
        // 调用查询的方法
        List<Account> list = accountDao.findAll();
        for (Account account : list){
    
    
            System.out.println(account);
        }
        // 释放资源
        session.close();
        in.close();
    }

    @Test
    public void saveMybatis() throws Exception{
    
    

        Account account = new Account();
        account.setName("小王");
        account.setMoney(100000d);

        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建工厂
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建sqlSession对象
        SqlSession session = factory.openSession();
        // 获取代理对象
        IAccountDao accountDao = session.getMapper(IAccountDao.class);
        accountDao.saveAccount(account);
        // 提交事务
        session.commit();
        // 释放资源
        session.close();
        in.close();
    }
}

Spring整合MyBatis框架

目的：实现查询和添加
把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中

<!--Spring整合MyBatis框架-->
    <!--配置连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssmtotal?serverTimezone=UTC&amp;characterEncoding=utf-8"/>
        <property name="user" value="root"/>
        <property name="password" value="7107883"/>
    </bean>

    <!--配置SqlSessionFactory工厂-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置IAccountDao接口所在包-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.cz.dao"/>
    </bean>

    <!--配置Spring框架声明式事务管理-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置事务通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
    <!--配置AOP增强-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.cz.service.impl.*ServiceImpl.*(..))"/>
    </aop:config>

在IAccountDao接口中添加@Repository注解

@Repository
public interface IAccountDao {
    
    
//.....
}

在账户业务层实现类中注入dao对象，进行测试

@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    
    

    @Autowired
    private IAccountDao accountDao;

    /**
     * 查询所有
     * @return
     */
    @Override
    public List<Account> findAll() {
    
    
        System.out.println("业务层：查询所有账户...");
        return accountDao.findAll();
    }

    /**
     * 保存用户
     * @param account
     */
    @Override
    public void saveAccount(Account account) {
    
    
        System.out.println("业务层：保存账户...");
        accountDao.saveAccount(account);
    }
}

修改控制器中的方法

@Controller
@RequestMapping("/account")
public class AccountController {
    
    

    @Autowired
    private IAccountService accountService;

    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(Model model){
    
    
        System.out.println("表现层：查询所有账户信息...");
        //调用service方法
        List<Account> list = accountService.findAll();
        model.addAttribute("list",list);
        return "list";
    }

    /**
     * 保存
     * @return
     */
    @RequestMapping("/save")
    public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
    
    
        accountService.saveAccount(account);
        //保存成功之后直接跳转到查询页面
        response.sendRedirect(request.getContextPath()+"/account/findAll");
        return;
    }
}

修改index.jsp和list.jsp:
index.jsp:

<body>

    <a href="account/findAll">测试查询所有</a>
<br/>
    <h3>测试保存</h3>
    <form action="account/save" method="post">
        姓名：<input type="text" name="name"/><br/>
        金额：<input type="text" name="money"/><br/>
        <input type="submit" value="提交"/><br/>
    </form>
</body>

list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

<h3>查询所有的帐户</h3>

<c:forEach items="${list}" var="account">
    ${account.name}
    ${account.money}
</c:forEach>


</body>
</html>