ssm框架(2) spring和mybatis整合

总体整合思路

1.Spring与Mybatis整合：

关键在于==spring-mybatis.xml==配置文件，主要配置自动扫描、自动注入以及数据库等。

JDBC属性文件==jdbc.properties.==

日志配置log4j配置文件==log4j2.xml==

2.整合Spring MVC：

springmvc的配置文件单独放，需要在web.xml里面配置整合，==dispatcher-servelet.xml==主要配置自动扫描、视图模式、注解的启动等。

==web.xml==主要配置dispatcher-servelet.xml文件以及监听、过滤器、欢迎页等。

准备工作

库表结构：

CREATE TABLE `tbl_user_info` (
  `user_id` int NOT NULL COMMENT 'id',
  `user_school` varchar(64) DEFAULT NULL COMMENT '用户所属学校',
  `user_name` varchar(32) NOT NULL COMMENT '用户姓名',
  PRIMARY KEY (`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COMMENT='用户表';

maven支持新建一个空白的web项目并根据maven结构设置java和resources文件夹（可参见springmvc部分项目初始化）

导包、静态资源配置

看上一个随笔 about (pom.xml)

创建项目层级文件夹

controller、service、dao（接口）、model、mapping（存放xml）

个人创建顺序为：model,Dao,mapping,service,Impl,controller

model

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Member {
    private String uname;
    private String upass;
}

Dao

public interface MemberMapper {

    public List<Member> getUserList();
    public int insertMember(Member member);
    public int deleteMember(String uname);
}

mapping

<?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.fzx.dao.MemberMapper">

    <resultMap id="BaseResultMap" type="com.fzx.model.Member">
        <result column="uname"  property="uname" />
        <result column="upass"  property="upass" />
    </resultMap>


    <select id="getUserList" resultMap="BaseResultMap">
        SELECT * FROM member
    </select>

    <insert id="insertMember">
        INSERT INTO member (uname,upass) VALUES (#{uname}, #{upass})
    </insert>
    
    <delete id="deleteMember">
        DELETE FROM member WHERE uname = #{uname}
    </delete>
</mapper>

service

public interface MemberService {

    public List<Member> getUserList();
    public int insertMember(Member member);
    public int deleteMember(String uname);
}

Impl

@Service
public class MemberServiceImpl implements MemberService {

    @Autowired
    MemberMapper memberMapper;

    @Override
    public List<Member> getUserList() {
        List<Member> userList = memberMapper.getUserList();
        return userList;
    }

    @Override
    public int insertMember(Member member) {
        int i = memberMapper.insertMember(member);
        return i;
    }

    @Override
    public int deleteMember(String uname) {
        return memberMapper.deleteMember(uname);
    }
}

数据库配置文件 /resources/dbconfig.properties

db.driverClassName=com.mysql.cj.jdbc.Driver
db.validationQuery=SELECT 1
db.url=jdbc:mysql://localhost:3306/20220215?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
db.username=root
db.password=94844896

创建spring-mybatis配置文件 /resources/spring-mybatis.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:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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-4.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.0.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
       http://www.springframework.org/schema/aop
       https://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">


    <!-- 自动扫描 -->
    <!--    在xml配置了这个标签后，spring可以自动去扫描base-pack下面或者子包下面的java文件，-->
    <!--    如果扫描到有@Component @Controller@Service等这些注解的类，则把这些类注册为bean-->
    <context:component-scan base-package="com.fzx" />

    <!-- 引入配置文件 -->
    <!-- 1.关联数据库文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <!-- ========================================配置数据源========================================= -->
    <!-- 配置数据源，使用的是alibaba的Druid(德鲁伊)数据源 -->
    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${db.url}" />
        <property name="username" value="${db.username}" />
        <property name="password" value="${db.password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="0" />
        <!-- 连接池最大空闲 -->
        <!-- 说明maxIdle已经被替代了，用maxActive和minIdle来表示数据库连接池的maxPoolSize和minPoolSize.-->
        <!-- <property name="maxIdle" value="20" />-->
        <!-- 连接池最大使用连接数量 -->
        <property name="maxActive" value="20" />
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="0" />
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="60000" />
        <property name="validationQuery" value="${db.validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="25200000" />
        <!-- 打开removeAbandoned功能 -->
        <property name="removeAbandoned" value="true" />
        <!-- 1800秒，也就是30分钟 -->
        <property name="removeAbandonedTimeout" value="1800" />
        <!-- 关闭abanded连接时输出错误日志 -->
        <property name="logAbandoned" value="true" />
    </bean>



    <!-- ========================================针对myBatis的配置项============================== -->
    <!-- 配置sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描com/liyw/mapping目录下的所有SQL映射的xml文件, 这样UserInfoMapper.xml就可以被自动扫描
         -->
        <property name="mapperLocations" value="classpath:com/fzx/mapping/*.xml" />
    </bean>
    <!-- 配置扫描器 -->
    <!--    扫描所有的mapper-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 扫描com.liyw.dao这个包以及它的子包下的所有映射接口类 -->
        <property name="basePackage" value="com.fzx.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>



    <!-- ========================================分隔线========================================= -->
    <!-- 配置Spring的事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--Xml方式配置事务-->
    <!-- 拦截器方式配置事物 -->
    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED" />
            <tx:method name="append*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="modify*" propagation="REQUIRED" />
            <tx:method name="edit*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="remove*" propagation="REQUIRED" />
            <tx:method name="repair" propagation="REQUIRED" />
            <tx:method name="delAndRepair" propagation="REQUIRED" />

            <tx:method name="get*" propagation="SUPPORTS" />
            <tx:method name="find*" propagation="SUPPORTS" />
            <tx:method name="load*" propagation="SUPPORTS" />
            <tx:method name="search*" propagation="SUPPORTS" />
            <tx:method name="datagrid*" propagation="SUPPORTS" />

            <tx:method name="*" propagation="SUPPORTS" />
        </tx:attributes>
    </tx:advice>
    <aop:config>
        <aop:pointcut id="transactionPointcut" expression="execution(* com.fzx.service..*Impl.*(..))" />
        <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
    </aop:config>




    <!--配置druid监控spring jdbc -->
    <bean id="druid-stat-interceptor"
          class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
    </bean>

    <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"
          scope="prototype">
        <property name="patterns">
            <list>
                <value>com.fzx.service.*</value>
                <value>com.fzx.dao.*</value>
            </list>
        </property>
    </bean>

    <aop:config>
        <aop:advisor advice-ref="druid-stat-interceptor"
                     pointcut-ref="druid-stat-pointcut" />
    </aop:config>

</beans>

以上步骤和我们在spring+mybatis集成基本一致，我们也一样写一个测试用例来测一下这个部分的集成是否成功。

在main的同级结构下创建test文件夹并增加支持。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class testMybatis {
    @Resource
    private MemberService memberService = null;
    @Resource
    private UserService userService = null;

    private static Logger LOGGER = LoggerFactory.getLogger(testMybatis.class);

    @Test
    public void test1() {
        List<Member> userList = memberService.getUserList();
        for (Member member:
             userList) {
            System.out.println(member);
        }
    }

}

posted on 2022-02-17 10:44 冯世鼎阅读(61) 评论(0) 编辑收藏举报