MyBatis和Spring整合

Categories: MyBatis

MyBatis和Spring整合的完整案例

文章目录[隐藏]

1.导入jar包
2.配置文件
3.创建实体类
4.创建dao
5.Mapper文件
5.service
6.controller

1.导入jar包

<dependencies>
    <!-- mybatis核心包 -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.1</version>
    </dependency>
    <!-- mysql驱动包 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.29</version>
    </dependency>
    <!--日志包-->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.1</version>
    </dependency>
    <!--spring数据库-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>4.3.11.RELEASE</version>
    </dependency>
    <!--aop-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>4.3.11.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.11.RELEASE</version>
    </dependency>
    <!--spring-mybatis整合包-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.1</version>
    </dependency>
    <!--spring MVC相关包-->
    <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-webmvc</artifactId>
         <version>4.3.11.RELEASE</version>
    </dependency>
    <!--Servlet相关包-->
    <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>javax.servlet-api</artifactId>
         <version>3.1.0</version>
    </dependency>
    <dependency>
         <groupId>jstl</groupId>
         <artifactId>jstl</artifactId>
         <version>1.2</version>
    </dependency>
    <!-- json -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.7.4</version>
    </dependency>
    <!-- 文件上传所依赖的jar包 -->
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
</dependencies>
<!--配置资源文件扫描，否则Mapper-->
<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.xml</include>
                <include>**/*.properties</include>
            </includes>
        </resource>
    </resources>
</build>

2.配置文件

创建jdbc.properties文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/数据库?characterEncoding=utf-8
jdbc.username=用户名
jdbc.password=密码

创建spring-config.xml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:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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-4.2.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
    <!--读取配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties" ignore-unresolvable="true"/>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--spring管理session工厂-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:com/ssm/club/dao/mapper/*.xml"/>
        <!--扫描实体类包,mapper中不用写全路径-->
        <property name="typeAliasesPackage" value="com.ssm.club.pojo"/>
    </bean>

    <!--批量扫描生成bean(Service)-->
    <context:component-scan base-package="com.ssm.club.service">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>
    </context:component-scan>
    <!--扫描dao所在包，生成代理实现类-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ssm.club.dao"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--如何进行事务增强-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" rollback-for="Exception"/>
            <tx:method name="update*" rollback-for="Exception"/>
            <tx:method name="delete*" rollback-for="Exception"/>
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <!--定义需要增强的方法-->
        <aop:pointcut id="adviceMethod" expression="execution(* com.ssm.club.service..*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="adviceMethod"/>
    </aop:config>
</beans>

创建springMVC-servlet.xml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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="
  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
  http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
    <mvc:annotation-driven/>
    <context:component-scan base-package="com.ssm.club.controller">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
    <!--加载spring配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-config.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
     <!--加载springMVC配置文件-->
     <servlet>
         <servlet-name>springMVC</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <!--跟随tomcat启动同时加载-->
         <load-on-startup>1</load-on-startup>
     </servlet>
     <servlet-mapping>
         <servlet-name>springMVC</servlet-name>
         <url-pattern>*.html</url-pattern>
     </servlet-mapping>
    <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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <welcome-file-list>
        <welcome-file>/list.html</welcome-file>
    </welcome-file-list>

</web-app>

3.创建实体类

public class ClubUser {
    private Integer id;
    private String name;
    private Integer sex;
    private Integer age;
    private String address;
    private String email;
}

public class ClubUserCriteria extends ClubUser {
    private Integer maxAge;
    private Integer minAge;
    private Integer offset;
    private Integer pageSize;
}

public class PageInfo<T> {
    private Integer totalCount;
    private Integer totalPage;
    private Integer pageNum;
    private Integer pageSize;
	private List<T> result;
}

4.创建dao

注：接口由spring管理，所以不用实现类

dao里的方法名与mapper中的语句对应

public interface ClubUserDAO {
    List<ClubUser> getUserList(ClubUserCriteria user);
    ClubUser getUserById(Integer id);
    void updateUser(ClubUser user);
    int getUserCount(ClubUserCriteria user);
}

5.Mapper文件

mapper文件的namespace对应dao

<?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" >
<mapper namespace="com.ssm.club.dao.ClubUserDAO">

    <resultMap id="userMap" type="ClubUser">
        <id property="id" column="ID"/>
        <result property="address" column="ADDRESS"/>
        <result property="name" column="NAME"/>
        <result property="sex" column="SEX"/>
        <result property="age" column="AGE"/>
        <result property="email" column="EMAIL"/>
    </resultMap>

    <sql id="select-user">
        select ID,NAME,SEX,AGE,ADDRESS,EMAIL
        from CLUB_USER
    </sql>

    <sql id="where-user">
        <where>
            <if test="name !=null and name!=''">and NAME LIKE concat('%',#{name},'%')</if>
            <if test="address !=null and address!=''">and address LIKE concat('%',#{address},'%')</if>
            <if test="email !=null and email!=''">and EMAIL=#{email}</if>
            <if test="sex!=null">and sex=#{sex}</if>
            <if test="maxAge !=null">and age &lt;=#{maxAge}</if>
            <if test="minAge !=null">and age &gt;=#{minAge}</if>
        </where>
    </sql>

    <select id="getUserList" parameterType="ClubUserCriteria" resultMap="userMap">
        <include refid="select-user"/>
        <include refid="where-user"/>
        limit #{offset},#{pageSize}
    </select>

    <select id="getUserCount" parameterType="ClubUserCriteria" resultType="int">
        select count(id) from CLUB_USER
        <include refid="where-user"/>
    </select>
    <select id="getUserById" parameterType="int" resultMap="userMap">
        <include refid="select-user"/>
        where id=#{id}
    </select>

    <update id="updateUser" parameterType="ClubUser">
        update CLUB_USER
        <set>
            <if test="name !=null and name!=''">NAME =#{name},</if>
            <if test="address !=null and address!=''">address =#{address},</if>
            <if test="email !=null and email!=''">EMAIL=#{email},</if>
            <if test="sex!=null">sex=#{sex},</if>
            <if test="age!=null">age=#{age},</if>
        </set>
        where ID=#{id}
    </update>
</mapper>

5.service

public interface ClubUserService {
    PageInfo<ClubUser> getUserList(ClubUserCriteria user,int pageNum,int pageSize);
    ClubUser getUserById(Integer id);
    void updateUser(ClubUser user);
}


@Service
public class ClubUserServiceImpl implements ClubUserService {
    @Autowired
    private ClubUserDAO clubUserDAO;

    @Override
    public ClubUser getUserById(Integer id) {
        return clubUserDAO.getUserById(id);
    }

    @Override
    public void updateUser(ClubUser user) {
        clubUserDAO.updateUser(user);
    }

    @Override
    public PageInfo<ClubUser> getUserList(ClubUserCriteria user, int pageNum, int pageSize) {
        Integer count = clubUserDAO.getUserCount(user);
        PageInfo<ClubUser> pageInfo = new PageInfo<>();
        pageInfo.setTotalCount(count);
        pageInfo.setPageSize(pageSize);
        pageInfo.setPageNum(pageNum);
        if (count > 0) {
            user.setPageSize(pageSize);
            user.setOffset((pageNum - 1) * pageSize);
            List<ClubUser> users = clubUserDAO.getUserList(user);
            pageInfo.setResult(users);
        }
        return pageInfo;
    }
}

6.controller


@Controller
public class UserController {

    @Autowired
    private ClubUserService clubUserService;

    @RequestMapping("/list.html")
    public String list(ClubUserCriteria clubUserCriteria, @RequestParam(defaultValue = "1") Integer pn, Model model) {
        if (pn < 1) {
            pn = 1;
        }
        PageInfo<ClubUser> users = clubUserService.getUserList(clubUserCriteria, pn, 3);
        model.addAttribute("pageInfo", users);
        return "list";
    }

    @RequestMapping("/go_update.html")
    public ModelAndView goUpdate(Integer id) {
        ClubUser clubUser = clubUserService.getUserById(id);
        return new ModelAndView("update", "clubUser", clubUser);
    }

    @RequestMapping("/update.html")
    public String update(ClubUser user, HttpServletRequest request) {
        try {
            clubUserService.updateUser(user);
            request.setAttribute("message", "修改成功");
            return "forward:/list.html";
        } catch (Exception e) {
            e.printStackTrace();
            request.setAttribute("message", "修改失败");
            return "update";
        }
    }
}