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SSM整合步骤

第一步:mybatis和spring整合

mybatis-spring-1.2.2:是mybatis官方出的包:

mybatis的包:

SSM整合步骤插图

mybatis和spring的整合包:

SSM整合步骤插图(1)

spring及springmvc的包:

SSM整合步骤插图(2)

Dao

Spring配置文件:

applicationContext.xml
<?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:mvc="http://www.springframework.org/schema/mvc"    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-3.1.xsd         http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.1.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-3.1.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-3.1.xsd ">    <!-- 引用配置文件 此处使用的是dbcp连接池-->    <context:property-placeholder location="classpath:db.properties" />      <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"        destroy-method="close">        <property name="driverClassName" value="${mysql.driver}" />        <property name="url" value="${mysql.url}" />        <property name="username" value="${mysql.username}" />        <property name="password" value="${mysql.password}" />        <property name="maxActive" value="30" />        <property name="maxIdle" value="5" />    </bean></beans>
applicationContext-dao.xml
<?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:mvc="http://www.springframework.org/schema/mvc"    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-3.1.xsd         http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.1.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-3.1.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-3.1.xsd ">      <!-- 会话工厂 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource"></property>        <!-- 加载mybatis的配置文件 -->        <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml"></property>    </bean>    <!-- mapper扫描器,这里由于没有在sqlMapConfig配置mapper,所以必须保证mapper和dao接口在同一个目录且同名 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="yycg.**.dao.mapper"></property>        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>     </bean>      <!-- 如果采用自动扫描器则不用手动设置工厂bean    <bean id="useryyMapper2" class="org.mybatis.spring.mapper.MapperFactoryBean">         <property name="mapperInterface"             value="yycg.dao.mapper.UserMapper" />         <property name="sqlSessionFactory" ref="sqlSessionFactory" />    </bean> -->      </beans>
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><!—使用自动扫描器时,mapper.xml文件如果和mapper.java接口在一个目录则此处不用定义mappers --><mappers>  <package name="cn.itcast.mybatis.mapper" /></mappers></configuration>
Mapper编写的三种方法
接口实现类继承SqlSessionDaoSupport

使用此种方法需要编写mapper接口,mapper接口实现类、mapper.xml文件

1、 sqlMapConfig.xml中配置mapper.xml的位置

 

<?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><mappers>     <!-- 通过resource扫描user.xml -->    <mapper resource="cn/itcast/ssm/dao/old/User.xml"/>      <!-- 扫描 cn.itcast.ssm.dao.mapper包下的mapper接口 -->    <package name="cn.itcast.ssm.dao.mapper" />   </mappers></configuration>

 

 

2、 定义mapper接口

3、 实现类继承了SqlSessionDaoSupport

mapper方法中可以this.getSqlSession()进行数据增删改查。

4、 spring 配置

 

<!-- mybatis运行环境 --><!-- 配置会话工厂,由spring管理 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">    <property name="dataSource" ref="dataSource"/>    <!-- mybatis全局配置文件 -->    <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property></bean><!-- 原始编写dao的方法 --><bean id="userDao" class="cn.itcast.ssm.dao.old.UserDaoImpl">   <property name="sqlSessionFactory" ref="sqlSessionFactory"/></bean>

 

使用org.mybatis.spring.mapper.MapperFactoryBean

1、 sqlMapConfig.xml中配置mapper.xml的位置

如果mapper.xmlmappre接口的名称相同且在同一个目录,这里可以不用配置

 

2、 定义mapper接口

 

注意

 

1)mapper.xml中的namespacemapper接口的地址

 

2)mapper接口中的方法名和mapper.xml中的定义的statementid保持一致

 

3、 Spring中定义

 

<!-- 通过代理对象方法生成mapper实现对象此种方法需要每个mapper进行配置,麻烦,不使用此方法 --><bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">   <!-- 指定mapper地址 -->   <property name="mapperInterface"   value="cn.itcast.ssm.dao.mapper.UserMapper" />     <property name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean>

 

使用mapper扫描器

1、 mapper.xml文件编写,

注意:

mapper.xml中的namespacemapper接口的地址

mapper接口中的方法名和mapper.xml中的定义的statementid保持一致

如果将mapper.xmlmapper接口的名称保持一致则不用在sqlMapConfig.xml中进行配置

2、 定义mapper接口

注意mapper.xml的文件名和mapper的接口名称保持一致,且放在同一个目录

3、 配置mapper扫描器

 

<!-- 使用mapper自动扫描器 自动将mapper包中的mapper扫描出来,注册到spring容器中,bean的id是mapper的类名(第一个字母小写)--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">   <!-- 指定mapper扫描的包 -->   <property name="basePackage" value="cn.itcast.ssm.dao.mapper"></property>    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean>

 

4、 使用扫描器后从spring容器中获取mapper的实现对象

扫描器将接口通过代理方法生成实现对象,要spring容器中自动注册,名称为mapper 接口的名称

 

Service

 

UserManager接口

 

编写UserManagerService接口,如下: 

 

public interface UserManagerService {    /**     * 根据id查询用户     */    public User findUserById(String id) throws Exception;}

 

public class UserManagerServiceImpl implements UserManagerService {    @Autowired    UserMapper userMapper;        @Override    public User findUserById(int id) throws Exception {        return userMapper.selectUserById(id);    } }
Spring配置文件:

userManagerspring配置文件进行配置

applicationContext–service.xml

<?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:mvc="http://www.springframework.org/schema/mvc"    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-3.1.xsd         http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.1.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-3.1.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-3.1.xsd ">    <!-- 用户管理-->    <bean id="userManagerService" class="cn.itcast.mybatis.service.impl.UserManagerServiceImpl" />   </beans>
Serivce测试:
ApplicationContext applicationContext;        protected void setUp() throws Exception {        applicationContext = new ClassPathXmlApplicationContext(                new String[]{                        "spring/applicationContext.xml",                        "spring/applicationContext-dao.xml",                        "spring/applicationContext-service.xml"                }                );            }    public void testFindUserById() throws Exception {        UserManagerService userManagerService = (UserManagerService)applicationContext.getBean("userManagerService");        System.out.println(userManagerService.findUserById(1));    }
事务控制:
配置

applicaitonContext.xml中配置事务管理器

 

<!-- 事务控制 -->    <bean id="txManager-base"    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"></property>    </bean>    <tx:advice id="txAdvice-base" transaction-manager="txManager-base">        <tx:attributes>            <tx:method name="save*" propagation="REQUIRED" />            <tx:method name="insert*" propagation="REQUIRED" />            <tx:method name="update*" propagation="REQUIRED" />            <tx:method name="delete*" propagation="REQUIRED" />            <tx:method name="get*" read-only="true" />            <tx:method name="select*" read-only="true" />            <tx:method name="find*" read-only="true" />        </tx:attributes>    </tx:advice>    <aop:config proxy-target-class="true">        <aop:advisor            pointcut="execution(* cn.itcast.**.service.impl.*.*(..))"            advice-ref="txAdvice-base" />    </aop:config>
事务测试

在一个service方法中先执行更新,再执行插入,插入一个违反唯一约束的记录,如果数据不回滚则说明事务没有控制。

 

Action

spingmvc.xml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:mvc="http://www.springframework.org/schema/mvc"    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-3.1.xsd         http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.1.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-3.1.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-3.1.xsd ">       <!-- 注解驱动 -->     <mvc:annotation-driven/>    <!-- 组件扫描,用于控制层 -->    <context:component-scan base-package="cn.itcast.mybatis.action" />        <!-- 视图解析器 -->    <bean        class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/jsp"></property>        <property name="suffix" value=".jsp"></property>    </bean>            <!-- 拦截器 -->    <!-- <mvc:interceptors>        多个拦截器,顺序执行        <mvc:interceptor>            <mvc:mapping path="/**" />            <bean class="cn.itcast.project.yycg.base.filter.LoginInterceptor"></bean>        </mvc:interceptor>        <mvc:interceptor>            <mvc:mapping path="/**" />            <bean class="cn.itcast.project.yycg.base.filter.PermissionInterceptor"></bean>        </mvc:interceptor>    </mvc:interceptors> -->        </beans>

编写UserAction.java

/** * 用户管理 * @author Thinkpad * */@Controller@RequestMapping("/user")public class UserAction {        @Autowired    UserManagerService userManagerService;        /**     * 用户修改     * @param model     * @param id     * @return     * @throws Exception     */    @RequestMapping("/useredit")    public String useredit(Model model,int id)throws Exception{        User user = userManagerService.findUserById(id);        model.addAttribute("user", user);        return "useredit";    }    /**     * 用户修改提交     * @param user     * @return     * @throws Exception     */    @RequestMapping("/usereditsubmit")    public String usereditsubmit(User user)throws Exception{        userManagerService.saveUser(user);        return "success";    }//其它方法略//……}

注意:学会如果在action中调用service,处理结果返回用户。

 

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name>mybatis_03</display-name>  <context-param>    <param-name>contextConfigLocation</param-name><param-value>/WEB-INF/classes/spring/applicationContext.xml,/WEB-INF/classes/spring/applicationContext-*.xml</param-value>  </context-param>  <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>    <filter>    <filter-name>SpringCharacterEncodingFilter</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>SpringCharacterEncodingFilter</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping>  <servlet>    <servlet-name>springmvc</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>    <init-param>      <param-name>contextConfigLocation</param-name>      <param-value>classpath:spring/springmvc-servlet.xml</param-value>    </init-param>  </servlet>  <servlet-mapping>    <servlet-name>springmvc</servlet-name>    <url-pattern>*.action</url-pattern>  </servlet-mapping>    <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list></web-app>

测试

将工程部署在tomcat运行,输入:http://localhost:8080/mybatis_03/user/useredit.aciton?id=1,进入首页

 

  

 

 

 

 

文章转载于:https://www.cnblogs.com/lm970585581/p/9569723.html

原著是一个有趣的人,若有侵权,请通知删除

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