SSM整合

一、搭建整合环境

1、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

2、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

3、创建数据库和表结构

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

4、创建maven的工程

• 创建ssm_parent父工程（打包方式选择pom，必须的）
• 创建ssm_web子模块（打包方式是war包）
• 创建ssm_service子模块（打包方式是jar包）
• 创建ssm_dao子模块（打包方式是jar包）
• 创建ssm_domain子模块（打包方式是jar包）
• web依赖于service，service依赖于dao，dao依赖于domain
• 在ssm_parent的pom.xml文件中引入坐标依赖
• 部署ssm_web的项目，只要把ssm_web项目加入到tomcat服务器中即可

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</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>

  <build>
    <finalName>ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

5、编写实体类，在ssm_domain项目中编写

/** * 帐户 */
public class Account implements Serializable{
   
    private Integer id;
    private String name;
    private Double money;
}

6、编写dao接口

/** * 帐户dao接口 */
@Repository
public interface AccountDao {
   

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

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

}

7、编写service接口和实现类

public interface AccountService {
   
    
    // 查询所有账户
    public List<Account> findAll();

    // 保存帐户信息
    public void saveAccount(Account account);

}

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

    @Autowired
    private AccountDao accountDao;

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

    public void saveAccount(Account account) {
   
        System.out.println("业务层：保存帐户...");
        accountDao.saveAccount(account);
    }
}

二、Spring框架代码的编写

1、搭建和测试Spring的开发环境

1）在ssm_web项目中创建applicationContext.xml的配置文件，编写具体的配置信息。

<!--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="cn.itcast" >
    <!--配置哪些注解不扫描-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan>

2、在ssm_web项目中编写测试方法，进行测试

@Test
public void run1(){
   
    // 加载配置文件
    ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    // 获取对象
    AccountService as = (AccountService) ac.getBean("accountService");
    // 调用方法
    as.findAll();
}

三、Spring整合SpringMVC框架

1、搭建和测试SpringMVC的开发环境

1）在web.xml中配置DispatcherServlet前端控制器

<!--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>

2）在web.xml中配置DispatcherServlet过滤器解决中文乱码

  <!--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>

3）创建springmvc.xml的配置文件，编写配置文件

<!--开启注解扫描，只扫描Controller注解-->
<context:component-scan base-package="cn.itcast">
    <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/>

4）测试SpringMVC的框架搭建是否成功

编写index.jsp和list.jsp编写，超链接

<a href="account/findAll">查询所有</a>

创建AccountController类，编写方法，进行测试

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

2、Spring整合SpringMVC的框架

1）目的：在controller中能成功的调用service对象中的方法。

2）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***（该***只能加载WEB-INF目录下的applicationContext.xml的配置文件）。

  <!--配置Spring的***，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>

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

四、Spring整合MyBatis框架

1、搭建和测试MyBatis的环境

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

<configuration> 
    <environments default="mysql"> 
        <environment id="mysql"> 
            <transactionManager type="JDBC"/> 
            <dataSource type="POOLED"> 
                <property name="driver" value="com.mysql.jdbc.Driver"/> 
                <property name="url" value="jdbc:mysql:///ssm"/> 
                <property name="username" value="root"/> 
                <property name="password" value="root"/> 
            </dataSource> 
        </environment> 
    </environments> 
    <!-- 使用的是注解 --> 
    <mappers> 
        <!-- <mapper class="cn.itcast.dao.AccountDao"/> --> 
        <!-- 该包下所有的dao接口都可以使用 --> 
        <package name="cn.itcast.dao"/> 
    </mappers> 
</configuration>

2）在AccountDao接口的方法上添加注解，编写SQL语句

public interface AccountDao {
    
    @Insert(value="insert into account (name,money) values (#{name},#{money})") 
    public void saveAccount(Account account); 
    @Select("select * from account") 
    public List<Account> findAll(); 
}

3）编写测试的方法

public class TestMyBatis {
   
    /** * 测试查询 * @throws Exception */
    @Test
    public void run1() throws Exception {
   
        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        SqlSession session = factory.openSession();
        // 获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        // 查询所有数据
        List<Account> list = dao.findAll();
        for(Account account : list){
   
            System.out.println(account);
        }
        // 关闭资源
        session.close();
        in.close();
    }

    /** * 测试保存 * @throws Exception */
    @Test
    public void run2() throws Exception {
   
        Account account = new Account();
        account.setName("熊大");
        account.setMoney(400d);

        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        SqlSession session = factory.openSession();
        // 获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);

        // 保存
        dao.saveAccount(account);

        // 提交事务
        session.commit();

        // 关闭资源
        session.close();
        in.close();
    }
}

2、Spring整合MyBatis框架

1）目的：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.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
    <property name="user" value="root"/>
    <property name="password" value="root"/>
</bean>

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

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

2）在AccountDao接口中添加@Repository注解

@Repository 
public interface AccountDao {
   
    
}

3）在service中注入dao对象，进行测试

@Service("accountService") 
public class AccountServiceImpl implements AccountService {
    
    @Autowired 
    private AccountDao accountDao;
}

@Controller 
@RequestMapping("/account") 
public class AccountController {
    
    @Autowired 
    private AccountService accoutService; 
    /** * 查询所有的数据 */
    @RequestMapping("/findAll") 
    public String findAll() {
    
        System.out.println("表现层：查询所有账户..."); 
        List<Account> list = accoutService.findAll(); 
        for (Account account : list) {
    
            System.out.println(account); 
        }
        return "list"; 
    } 
}

5）配置Spring的声明式事务管理

<!--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(* cn.itcast.service.impl.*ServiceImpl.*(..))"/>
</aop:config>

6）测试保存帐户的方法

<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="保存"/><br/>
</form>

/** * 帐户web */
@Controller
@RequestMapping("/account")
public class AccountController {
   
    @Autowired
    private AccountService accountService;

    /** * 保存 * @return */
    @RequestMapping("/save")
    public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
   
        accountService.saveAccount(account);
        response.sendRedirect(request.getContextPath()+"/account/findAll");
        return;
    }
}