SSM整合詳解

2021 年 1 月 3 日
筆記

1、基本概念

1.1、Spring
Spring是一個開源框架，Spring是於2003 年興起的一個輕量級的Java 開發框架，由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中闡述的部分理念和原型衍生而來。它是為了解決企業應用開發的複雜性而創建的。Spring使用基本的JavaBean來完成以前只可能由EJB完成的事情。然而，Spring的用途不僅限於伺服器端的開發。從簡單性、可測試性和松耦合的角度而言，任何Java應用都可以從Spring中受益。簡單來說，Spring是一個輕量級的控制反轉（IoC）和面向切面（AOP）的容器框架。

1.2、SpringMVC
Spring MVC屬於SpringFrameWork的後續產品，已經融合在Spring Web Flow裡面。Spring MVC 分離了控制器、模型對象、分派器以及處理程式對象的角色，這種分離讓它們更容易進行訂製。

1.3、Mybatis
MyBatis 本是apache的一個開源項目iBatis, 2010年這個項目由apache software foundation 遷移到了google code，並且改名為MyBatis 。MyBatis是一個基於Java的持久層框架。iBATIS提供的持久層框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了幾乎所有的JDBC程式碼和參數的手工設置以及結果集的檢索。MyBatis 使用簡單的 XML或註解用於配置和原始映射，將介面和 Java 的POJOs（Plain Old Java Objects，普通的 Java對象）映射成資料庫中的記錄。

2、操作流程

1、建立Maven工程

2、導入坐標建立依賴

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!--Junit-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <!--資料庫驅動-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.17</version>
    </dependency>
    <!-- 資料庫連接池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>

    <!--Servlet - JSP -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <!--Mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.2</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.2</version>
    </dependency>

    <!--Spring-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
    </dependency>
  </dependencies>

  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
  </build>
</project>

3、編寫實體類

@Data
@AllArgsConstructor
@NoArgsConstructor
@Setter
@Getter
@ToString
public class User implements Serializable {
    private Integer id;

    private String username;

    private String sex;

    private String address;
}

4、編寫持久層

public interface UserDao {

    /**
     * 查詢所有用戶資訊
     * */
   List<User> findAll();

    /**
     * 增加用戶
     * */
    void create(User user);
}

5、編寫業務層介面

public interface UserService {

    /**
     * 查詢所有用戶資訊
     * */
    List<User> findAll();

    /**
     * 增加用戶
     * */
    void create(User user);
}

6、編寫業務層介面實現

public class UserServiceImpl implements UserService {

    @Override
    public List<User> findAll() {
        System.out.println("查詢所有用戶");
        return null;
    }

    @Override
    public void create(User user) {
        System.out.println("增加一個用戶資訊");
    }
}

##7、編寫控制層 
```java
public class UserController {

}

SSM整合

1、Spring相關配置

Spring.xml配置表頭

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xmlns:context="//www.springframework.org/schema/context"
       xmlns:aop="//www.springframework.org/schema/aop"
       xmlns:tx="//www.springframework.org/schema/tx"
       xsi:schemaLocation="//www.springframework.org/schema/beans
       //www.springframework.org/schema/beans/spring-beans.xsd
       //www.springframework.org/schema/context
       //www.springframework.org/schema/context/spring-context.xsd
       //www.springframework.org/schema/aop 
       //www.springframework.org/schema/aop/spring-aop.xsd
       //www.springframework.org/schema/tx 
       //www.springframework.org/schema/tx/spring-tx.xsd">

</beans>

Spring的相關配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xmlns:context="//www.springframework.org/schema/context"
       xmlns:aop="//www.springframework.org/schema/aop"
       xmlns:tx="//www.springframework.org/schema/tx"
       xsi:schemaLocation="//www.springframework.org/schema/beans
       //www.springframework.org/schema/beans/spring-beans.xsd
       //www.springframework.org/schema/context
       //www.springframework.org/schema/context/spring-context.xsd
       //www.springframework.org/schema/aop
       //www.springframework.org/schema/aop/spring-aop.xsd
       //www.springframework.org/schema/tx
       //www.springframework.org/schema/tx/spring-tx.xsd">

     <!--開啟註解掃描-->
    <context:component-scan base-package="com.xiaohe">
        <!--<context:include-filter type="" expression=""/>-->
        <!--排除Controller註解，不需要掃描的這類-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

</beans>

業務了邏輯層實現類程式碼

@Service(value = "userService")
public class UserServiceImpl implements UserService {

    @Override
    public List<User> findAll() {
        System.out.println("查詢所有用戶");
        return null;
    }
##1、SpringMVC配置
    @Override
    public void create(User user) {
        System.out.println("增加一個用戶資訊");
    }
}

測試Spring配置是否成功,新建一個測試Demo


    @Test
    public void testSpring(){
     //獲取spring容器
        ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
        UserServiceImpl userService = context.getBean("userService", UserServiceImpl.class);
        userService.findAll();
    }
}

控制台輸出

成功

2、SpringMVC相關配置

Web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="//xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="//xmlns.jcp.org/xml/ns/javaee //xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

  <!--DispatcherServlet-->
  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <!--一定要注意:我們這裡載入的是總的配置文件，之前被這裡坑了！-->
      <param-value>classpath:applicationContext.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!--encodingFilter-->
  <filter>
    <filter-name>encodingFilter</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>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!--Session過期時間-->
  <session-config>
    <session-timeout>15</session-timeout>
  </session-config>

</web-app>

配置SpringMVC配置文件相關約束

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xmlns:context="//www.springframework.org/schema/context"
       xmlns:mvc="//www.springframework.org/schema/mvc"
       xsi:schemaLocation="//www.springframework.org/schema/beans
   //www.springframework.org/schema/beans/spring-beans.xsd
   //www.springframework.org/schema/context
   //www.springframework.org/schema/context/spring-context.xsd
   //www.springframework.org/schema/mvc
   //www.springframework.org/schema/mvc/spring-mvc.xsd">
</beans>

Springmvc相關配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xmlns:context="//www.springframework.org/schema/context"
       xmlns:mvc="//www.springframework.org/schema/mvc"
       xsi:schemaLocation="//www.springframework.org/schema/beans
       //www.springframework.org/schema/beans/spring-beans.xsd
       //www.springframework.org/schema/context
       //www.springframework.org/schema/context/spring-context.xsd
       //www.springframework.org/schema/mvc
       //www.springframework.org/schema/mvc/spring-mvc.xsd">
     <!--掃描Controller相關註解-->
    <context:component-scan base-package="com.xiaohe">
        <!--表示只掃描Controller註解-->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!--配置視圖解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--配置前綴-->
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <!--配置後綴-->
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--設置靜態程式碼不過濾-->
    <mvc:default-servlet-handler/>
    <!--開啟Spring註解支援-->
    <mvc:annotation-driven />
</beans>

controller配置

@Controller
@RequestMapping("/user")
public class UserController {

    //查詢所有的用戶資訊
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("查詢到所有的用戶列表");
        return "userList";
    }
}

index.jsp

<html>
<body>
<a href="/user/findAll">UserList</a>
</body>
</html>

userList.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用戶列表頁面</title>
</head>
<body>
<h1>UserList</h1>
</body>
</html>

測試

成功

3、Spring-SpringMVC整合

在Web.xml裡面添加監聽器

<!--配置Spring監聽器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring.xml</param-value>
  </context-param>

4、Spring-mybbatis整合

配置Mybatis-config
mybatis–config的頭部資訊

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "//mybatis.org/dtd/mybatis-3-config.dtd">

mybatis-config配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "//mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--配置資料庫環境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"/>
                <dataSource type="POOLED">
                    <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                    <property name="url" value="jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC"/>
                    <property name="username" value="root"/>
                    <property name="password" value="123456"/>
                </dataSource>
        </environment>
    </environments>
    <!--配置映射文件-->
    <!--使用註解-->
    <mappers>
        <package name="com.xiaohe.dao"/>
    </mappers>
</configuration>

編寫測試類

    @Test
    public void testMybatis() throws IOException {
        //載入配置文件
        InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();
        UserDao userDao = sqlSession.getMapper(UserDao.class);
        List<User> user = userDao.findAll();
        for (User user1 : user) {
            System.out.println(user1);
        }
        sqlSession.close();
    }
}

結果

成功
Spring整合Mybatis
在spring.xml添加

  <!--配置session工廠-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--掃描dao介面-->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xiaohe.dao"/>
    </bean>

測試成功

至此為止SSM整合完成
補充事務
在Spring.xml添加

    <!--配置事務管理器-->
    <!--配置事務通知-->
    <tx:advice id="txAdvice" transaction-manager="dataSourceTransactionManager">
        <tx:attributes>
            <!--select方法-->
            <tx:method name="find" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
    <!--配置AOP相關增強-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xiaohe.service.impl.*ServiceImpl(..))"></aop:advisor>
    </aop:config>

SSM整合詳解

1、基本概念

2、操作流程

1、建立Maven工程

2、導入坐標建立依賴

3、編寫實體類

4、編寫持久層

5、編寫業務層介面

6、編寫業務層介面實現

SSM整合

1、Spring相關配置

2、SpringMVC相關配置

3、Spring-SpringMVC整合

4、Spring-mybbatis整合

VirMach 便宜 VPS

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SSM整合詳解

1、基本概念

2、操作流程

1、建立Maven工程

2、導入坐標建立依賴

3、編寫實體類

4、編寫持久層

5、編寫業務層介面

6、編寫業務層介面實現

SSM整合

1、Spring相關配置

2、SpringMVC相關配置

3、Spring-SpringMVC整合

4、Spring-mybbatis整合

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