SSM搭建详解

第一步骤:保证spring的Ioc独立运行

导入依赖

 <!--spring和springmvc座标-->
  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.0.4.RELEASE</version>
    </dependency>
    <!--mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.5</version>
    </dependency>
    <!--spring整合mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
    <!--mysql-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.6</version>
    </dependency>
    <!--导入德鲁伊数据源-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <!--导入junit测试座标-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <!--spring整合junit-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.0.4.RELEASE</version>
    </dependency>
    <!--jstl-->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!--servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <!--jsp-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
    </dependency>
    <!--解析切入点表达式的座标-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.13</version>
    </dependency>
    <!--事务的座标-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.0.4.RELEASE</version>
    </dependency>
  </dependencies>

编写业务层代码

Service接口

 public interface CompanyService {

    //查询所有
    List<Company> findAll();

    //根据id查询
    Company findById(String id);

    //更新
    void update(Company company);
 }

ServiceImpl实现类

@Service
public class CompanyServiceImpl implements CompanyService {

    private CompanyDao companyDao;

    public List<Company> findAll() {
        System.out.println("执行了查询所有的方法");
        return null;
    }

    public Company findById(String id) {
        return null;
    }

    public void update(Company company) {

    }
}

spring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:context="http://www.springframework.org/schema/context"
       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">
    <!--配置spring容器要扫描的包-->
<context:component-scan base-package="包名.....">
<!--排除Controller注解-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
</beans>

测试保证spring的IOC独立运行

public class Test01SpringIoc {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        CompanyService serviceImpl = applicationContext.getBean("companyServiceImpl",CompanyService.class);
        System.out.println(serviceImpl.findAll());
    }
}

结果

[外链图片转存失败(img-vub6kYlh-1569163462217)(D:\Zone\CSDN\TimeFriends\九月\9月8日\springIOC.png)]

第二步保证Mybatis独立运行

创建mybatis的配置文件

SqlMapConfig.xml

 <?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">
<configuration>
    <!--引入properties文件-->
    <properties resource="jdbc.properties">

    </properties>
    <!--配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}"></property>
                <property name="username" value="${jdbc.username}"></property>
                <property name="password" value="${jdbc.password}"></property>
            </dataSource>
        </environment>
    </environments>
    <!--指定映射文件的位置-->
    <mappers>
        <package name="com.itheima.dao"></package>
    </mappers>
</configuration>

jdbc.properties配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/company_e88
jdbc.username=root
jdbc.password=root

CompanyDao.xml映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--命名空间操作的是哪个dao-->
<mapper namespace="com.itheima.dao.CompanyDao">
    <!--配置数据库列名和实体类名称的对应关系-->
    <resultMap id="companyMap" type="com.itheima.dao.CompanyDao">
        <id column="id" property="id"></id>
        <result column="name" property="name"></result>
        <result column="expiration_date" property="expirationDate"></result>
        <result column="address" property="address"></result>
        <result column="license_id" property="licenseId"></result>
        <result column="representative" property="representative"></result>
        <result column="phone" property="phone"></result>
        <result column="company_size" property="companySize"></result>
        <result column="industry" property="industry"></result>
        <result column="remarks" property="remarks"></result>
        <result column="state" property="state"></result>
        <result column="balance" property="balance"></result>
        <result column="city" property="city"></result>
    </resultMap>
    <!--配置查询所有-->
    <select id="findAll" resultMap="companyMap">
        select * from  ss_company;
    </select>
    <!--配置根据id查询-->
    <select id="findById" resultMap="companyMap" parameterType="java.lang.String" >
        select * FROM ss_company where id=#{id}
    </select>
    <!--配置更新-->
    <update id="update" parameterType="com.itheima.domain.Company">
        update ss_company set
            `name`=#{name},
            expiration_date=#{expirationDate},
            address=#{address},
            license_id=#{licenseId},
            representative=#{representative},
            phone=#{phone},
            company_size=#{companySize},
            industry=#{industry},
            remarks=#{remarks},
            state=#{state},
            balance=#{balance},
            city=#{city}
        WHERE id=#{id}
    </update>
</mapper>

编写测试类:

public class Test02Mybatis {
    public static void main(String[] args) throws IOException {
        //1.读取主配置文件
        InputStream stream = Resources.getResourceAsStream("SqlMapConfig.xml");
        //2.创建构建者对象
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        //3.构建sqlSessionFactory
        SqlSessionFactory factory = builder.build(stream);
        //4.创建sqlSession
        SqlSession sqlSession = factory.openSession();
        //5.创建dao接口的代理实现类
        CompanyDao proxyMapper = sqlSession.getMapper(CompanyDao.class);
        //6.执行dao的方法
        Company company = proxyMapper.findById("2");
        System.out.println(company);
        //7.释放资源
        sqlSession.close();
        stream.close();
    }
}

第三步整合spring和mybatis

思路:spring接管SqlSessionFactory的创建,以及dao接口的代理实现类的创建

在applicationContext.xml中

<?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"
       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">
    <!--配置spring容器要扫描的包-->
<context:component-scan base-package="com.itheima">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
	
	<!----------------------------------------------------------------------------->
   <!--整合spring和mybatis-->
    <!--指定properties文件的位置-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--注入数据源操作数据库-->
        <property name="dataSource" ref="dataSource">

        </property>
    </bean>

    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--自动创建dao接口的代理实现类并且存入Ioc容器-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.dao"></property>
    </bean>
</beans>

第四步保证spring事务的正常使用

在applicationContext.xml中配置事务

<?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"
       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">
    <!--配置spring容器要扫描的包-->
<context:component-scan base-package="com.itheima">
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
	
	<!----------------------------------------------------------------------------->
   <!--整合spring和mybatis-->
    <!--指定properties文件的位置-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--注入数据源操作数据库-->
        <property name="dataSource" ref="dataSource">

        </property>
    </bean>

    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--自动创建dao接口的代理实现类并且存入Ioc容器-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.dao"></property>
    </bean>
    
      <!----------------------------------------------------------------------------->
      <!--配置事务-->
       <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--配置事务的通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--配置事务的属性-->
        <tx:attributes>
            <tx:method name="*" read-only="false" propagation="REQUIRED"/>
            <tx:method name="find*" read-only="true" propagation="SUPPORTS"></tx:method>
        </tx:attributes>
    </tx:advice>
    <!--配置aop-->
    <aop:config>
        <!--配置切入点:.*.*(..) 任意类下的任意方法的有无返回值都可-->
        <aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut>
        <!--建立切入点表达式和事务通知的关系-->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"></aop:advisor>
    </aop:config>
</beans>

在service实现类中加入注解@Autowried注入dao

 @Autowired
   private CompanyDao companyDao;

测试spring和mybatis的整合结果

/**
 * 测试spring和mybatis的整合结果
 */
/*创建容器*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Test03SpringMybatis {

    @Autowired
    private CompanyService companyService;
    @Test
    public void testFindAll(){
        List<Company> companyList = companyService.findAll();
        for (Company company : companyList) {
            System.out.println(company);
        }
    }

    @Test
    public void testUpdate(){
        Company company = companyService.findById("2");
        company.setExpirationDate(new Date());
        companyService.update(company);
    }
}

第五步保证springMvc的独立运行

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_2_5.xsd"
         version="2.5">
    <!--配置前端控制器-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--配置servlet的初始化参数,指定springmvc配置文件的位置-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!--配置servlet启动时候就创建-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <!--*.do与/的区别:/访问静态资源的时候需要配置mvc:resources-->
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <!--配置字符集过滤器,过滤器的生命周期是项目启动-->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!--配置过滤器的初始化参数,指定使用的字符集-->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <!--拦截过滤当前项目下的所有资源-->
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

springmvc.xml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:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       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">

    <!--配置springmvc创建容器时扫描的包-->
    <context:component-scan base-package="com.itheima.controller"></context:component-scan>
    <!--配置视图解析器-->
    <bean id="ViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--开启springmvc的注解支持-->
    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

Controller层

@Controller
@RequestMapping("/company")
public class CompanyController {
//没有注入是因为这一步骤是保证springmvc的独立运行
    private CompanyService companyService;

    /**
     * 配置查询所有
     * @return
     */
    @RequestMapping("/list")
    public String findAll(){
        System.out.println("执行了查询所有");
        return "";
    }
}

在web.xml中配置监听器(监听项目启动的时候就创建容器解决注入不进去的问题)

CompanyController类

注意:update需要重定向,如果请求转发那么地址栏不会发生变化,刷新会导致再次更新.所以update需要重定向.

@Controller
@RequestMapping("/company")
public class CompanyController {

    @Autowired
    private CompanyService companyService;

    /**
     * 配置查询所有
     * @return
     */
    @RequestMapping("/list")
    public String findAll(HttpServletRequest request){
        List<Company> companyList = companyService.findAll();
        //存到请求域中
        request.setAttribute("list",companyList);
        //转发到列表页面
        return "company-list";
    }

    /**
     * 前往更新页面,根据id查询
     * @return
     */
    @RequestMapping("/toUpdate")
    public String toUpdate(String id,HttpServletRequest request){
        Company company = companyService.findById(id);
        //存入到请求域中
        request.setAttribute("company",company);
        companyService.update(company);
        return "company-update";
    }

    @RequestMapping("/edit")
    public String edit(Company company){
        companyService.update(company);
        //重定向到列表页面
        return "redirect:/company/list.do";
    }
}

}

/**
 * 前往更新页面,根据id查询
 * @return
 */
@RequestMapping("/toUpdate")
public String toUpdate(String id,HttpServletRequest request){
    Company company = companyService.findById(id);
    //存入到请求域中
    request.setAttribute("company",company);
    companyService.update(company);
    return "company-update";
}

@RequestMapping("/edit")
public String edit(Company company){
    companyService.update(company);
    //重定向到列表页面
    return "redirect:/company/list.do";
}

}

SSM搭建详解

SSM搭建详解

第一步骤:保证spring的Ioc独立运行

导入依赖

编写业务层代码

Service接口

ServiceImpl实现类

spring配置文件

第二步保证Mybatis独立运行

创建mybatis的配置文件

SqlMapConfig.xml

jdbc.properties配置文件

CompanyDao.xml映射文件

编写测试类:

第三步整合spring和mybatis

思路:spring接管SqlSessionFactory的创建,以及dao接口的代理实现类的创建

在applicationContext.xml中

第四步保证spring事务的正常使用

在applicationContext.xml中配置事务

在service实现类中加入注解@Autowried注入dao

测试spring和mybatis的整合结果

第五步保证springMvc的独立运行

springmvc.xml配置文件

在web.xml中配置监听器(监听项目启动的时候就创建容器解决注入不进去的问题)

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