SSM 整合

• ssm搭建环境
  在pom.xml中导入项目所需坐标，创建所需要的包和类。
  

ssm整合Spring框架

1. 想要将类交给spring容器接管，必须写一个配置文件，开启注解扫描

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsd"><!--Spring配置文件--><!--开启注解的扫描,只处理service和dao,controller不需要，它是springMvc的--><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:exclude-filter></context:component-scan></beans>

2. 测试：

public class TestSpring {@Testpublic void run1(){//加载配置文件ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");//获取对象AccountService as = ac.getBean("accountService", AccountService.class);//执行方法as.findAll();   //有输出，说明spring环境搭建成功}
}

ssm整合SpringMVC框架

1. web.xml

<!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Spring.xml文件--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><!--启动服务器，就创建该servlet--><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>

2. springmvc.xml

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://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="cn.itcast"><!--只扫描Controller注解--><context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan><!--配置视图解析器对象--><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注解支持--><mvc:annotation-driven/>
</beans>

3. 测试

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

启动tomcat服务器的时候，需要加载spring的配置文件，然后在controller注入对象，就可以调用业务层方法。

web.xml<!--配置spring的监听器,默认只加载WEB-INF目录下的配置文件--><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><!--加载类路径下的spring配置文件--><param-value>classpath:applicationContext.xml</param-value></context-param>

@Controller
@RequestMapping("/account")
public class AccountController {@Autowiredprivate AccountService accountService;@RequestMapping("/findAll")public String findAll(){System.out.println("表现层，查询所有账户信息...");//调用serviceaccountService.findAll();return "list";}
}

Spring整合MyBatis框架

1. 配置mybatis环境

SqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><!--配置环境--><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?characterEncoding=utf-8"/><property name="username" value="root"/><property name="password" value="root"/></dataSource></environment></environments><!--引入映射配置文件--><mappers><!--使用的是注解配置，只需要接口的全路径--><!--<mapper class="cn.itcast.dao.AccountDao"/>--><package name="cn.itcast.dao"/><!--这种直接写包的用法，包里所有dao类都扫描到--></mappers>
</configuration>

/*账户接口
*   之后会使用代理对象，不需要编写实现类
*/public interface AccountDao {//查询所有@Select("select *from account")public List<Account> findAll();//保存账户信息@Insert("insert into account (name,money) values (#{name},#{money})")public void save(Account account);
}

• 测试

public class TextMybatis {@Testpublic 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();}
}

2. Spring整合MyBatis
   把mybatis代理对象存入容器，在service注入dao对象，就可以调用dao层方法。

• 在Spring配置文件中配置整合MyBatis，之前的SqlMapConfig.xml可以删除了。

applicationContext.xml
<!--Spring整合MyBatis框架--><!--1 配置连接池--><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql:///ssm?characterEncoding=utf-8"></property><property name="user" value="root"></property><property name="password" value="root"></property></bean><!--2 配置工厂对象SqlSessionFactory--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!--通过连接池就可以构建Session工厂--><property name="dataSource" ref="dataSource"></property></bean><!--3 配置AccountDao所在的包--><!--映射的扫描--><bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="cn.itcast.dao"></property></bean>

• 流程：
  浏览器访问a标签，跳转到controller，controller中使用自动注入获取service对象，service会调用dao方法查询数据库，使用model.addAttribute存储返回结果，在controller跳转的页面中获取数据，遍历显示。

@Controller
@RequestMapping("/account")
public class AccountController {@Autowiredprivate AccountService accountService;@RequestMapping("/findAll")public String findAll(Model model){System.out.println("表现层，查询所有账户信息...");//调用serviceList<Account> list = accountService.findAll();model.addAttribute("list",list);return "list";}
}
--------------------------------------------------------
@Service("accountService")
public class AccountServiceImpl implements AccountService {@Autowiredprivate AccountDao dao;@Overridepublic List<Account> findAll() {System.out.println("业务层，查询所有账户");return dao.findAll();}@Overridepublic void save(Account account) {System.out.println("业务层，保存账户");dao.save(account);}
}
--------------------------------------------------------
@Repository
public interface AccountDao {//查询所有@Select("select *from account")public List<Account> findAll();//保存账户信息@Insert("insert into account (name,money) values (#{name},#{money})")public void save(Account account);
}
--------------------------------------------------------
list.jsp<h3>查询所有账户信息</h3><c:forEach items="${list}" var="account">${account.name}</c:forEach>

3. 事务管理

• 配置Spring的声明式事务管理

applicationContext.xml
<!--配置Spring的声明式事务管理--><!--1 配置事务管理器--><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"/></bean><!--2 配置事务的通知--><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><!--3 配置aop的增强--><aop:config><aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.itcast.service.impl.*ServiceImpl.*(..))"/></aop:config>

测试：

<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="保存">
</form>

@RequestMapping("/save")public void save(Account account, HttpServletRequest request,HttpServletResponse response) throws IOException {System.out.println("表现层，保存...");accountService.save(account);response.sendRedirect(request.getContextPath()+"/account/findAll"); //重定向return;}