移动商城第三篇【搭建Mybatis和Spring环境、编写Dao、Service在Core模块】

Mybatis和Spring环境搭建

由于我们的所编写的dao层、service代码可能前台和后台都需要用到的，因此我们把环境搭建在core模块中

逆向工程

首先，我们要做的就是品牌管理，我们首先来看看原型界面的的品牌管理

涉及到的数据库表在我们的powerdesigner中就已经定义过了

我们来看一下对应数据库表的数据

添加逆向工程插件

    <build>
        <finalName>zhongfucheng</finalName>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>

编写逆向工程文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC
"-//mybatis.org//DTD MyBatis Generator Configuration 
1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"
>
<generatorConfiguration>
    <!-- 制定mysql的驱动包的路径 千万别放中文路径下 -->
    <classPathEntry location="F:传智168期JAVA传智168期JAVA移动商城shoprepositoryshoprepository
epositorycomoracleojdbc1410.2.0.2.0ojdbc14-10.2.0.2.0.jar" />

    <!-- 配置数据源和生成的代码所存放的位置 -->
    <context id="context1">

        <commentGenerator>
            <!-- 是否取消注释 -->
            <property name="suppressAllComments" value="true" />
            <!-- 是否生成注释代时间戳 -->
            <property name="suppressDate" value="true" />
        </commentGenerator>
        <jdbcConnection driverClass="oracle.jdbc.OracleDriver"
            connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:ZHONGFUCHENG" userId="zhongfucheng"
            password="zhong" />
        <!-- 所生成的实体类的位置默认资源包src -->
        <javaModelGenerator targetPackage="com.rl.ecps.model" targetProject="src/main/java" />
        <!-- 所生成的sqlMap的影射文件的位置,默认资源包src -->
        <sqlMapGenerator targetPackage="com.rl.ecps.sqlMap" targetProject="src/main/java" />

        <!-- 为哪些表生成代码 tableName:表名 schema:不用填写 -->
        <table schema="" tableName="eb_brand" enableCountByExample="false"
            enableUpdateByExample="false" enableDeleteByExample="false"
            enableSelectByExample="false" selectByExampleQueryId="false"
        >
        </table>
    </context>
</generatorConfiguration>

生成的文件：

sqlMapping映射文件也算是一种资源文件把，因此我把它移到resources中了

编写Mybatis配置文件

sqlMapConfig.xml

<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <mappers>
        <mapper resource="sqlMap/EbBrandMapper.xml"/>
    </mappers>
</configuration>

创建beans.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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--开启注解-->
    <context:component-scan base-package="com.rl.ecps"/>

    <!--配置连接池-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="oracle.jdbc.OracleDriver"></property>
        <property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:ZHONGFUCHENG"></property>
        <property name="username" value="zhongfucheng"></property>
        <property name="password" value="zhong"></property>
    </bean>


    <!--配置sessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:sqlMapConfig.xml"></property>
    </bean>


    <!--配置事务管理器-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--配置事务具体方法-->
    <tx:advice id="txAdive" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="add*" propagation="REQUIRED"/>
            <tx:method name="modify*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="remove*" propagation="REQUIRED"/>
            <tx:method name="select*" read-only="true"/>
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!--配置切面-->
    <aop:config>
        <aop:advisor advice-ref="txAdive" pointcut="execution(* com.rl.ecps.service..*.*(..))"/>
    </aop:config>

</beans>

添加log4j

log4j.properties

log4j.rootLogger=DEBUG, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

Dao层

编写Dao接口

interface EbBrandDao {


    void saveBrand(EbBrand brand);

    EbBrand getBrandById(Long brandId);

    void updateBrand(EbBrand brand);

    void deleteBrand(Long brandId);

    List<EbBrand> selectBrand();

    List<EbBrand> selectBrandByName(String brandName);
}

编写Dao实现

/**
 * 继承SqlSessionDaoSupport能够得到sessionFactory的引用，非常方便！
 */
@Repository
public class EbBrandDaoImpl extends SqlSessionDaoSupport implements EbBrandDao {

    String nameSpace = "com.rl.ecps.sqlMap.EbBrandMapper.";

    public void saveBrand(EbBrand brand) {

        this.getSqlSession().insert(nameSpace + "insert", brand);
    }
    public EbBrand getBrandById(Long brandId) {
        return this.getSqlSession().selectOne(nameSpace + "selectByPrimaryKey", brandId);
    }
    public void updateBrand(EbBrand brand) {

        /**
         * updateByPrimaryKeySelective和updata的区别：
         *  一个是动态SQL，一个是静态SQL。这里就使用动态SQL比较好。因为是更新操作
         */
        this.getSqlSession().update(nameSpace + "updateByPrimaryKeySelective", brand);
    }
    public void deleteBrand(Long brandId) {

        this.getSqlSession().delete(nameSpace + "deleteByPrimaryKey", brandId);
    }
    public List<EbBrand> selectBrand() {
        return this.getSqlSession().selectList(nameSpace+"selectBrand");
    }
    public List<EbBrand> selectBrandByName(String brandName) {
        return this.getSqlSession().selectList(nameSpace+"selectBrandByName", brandName);
    }
}

mybatis插件只有最后两个方法没有帮我们自动生成，其他的SQL语句都自动生成了。

  <select id="selectBrand" resultMap="BaseResultMap">
    select * from eb_brand
  </select>

  <select id="selectBrandByName" resultMap="BaseResultMap" parameterType="string">
      select * from eb_brand t where t.brand_name = #{brandName}
  </select>

---

编写Service

Service接口

public interface EbBrandService {
    void saveBrand(EbBrand brand);

    EbBrand getBrandById(Long brandId);

    void updateBrand(EbBrand brand);

    void deleteBrand(Long brandId);

    List<EbBrand> selectBrand();

    List<EbBrand> selectBrandByName(String brandName);
}

Service实现

package com.rl.ecps.service.impl;

import com.rl.ecps.dao.EbBrandDao;
import com.rl.ecps.dao.impl.EbBrandDaoImpl;
import com.rl.ecps.model.EbBrand;
import com.rl.ecps.service.EbBrandService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * Created by ozc on 2017/8/26.
 */

@Service
public class EbBrandServiceImpl implements EbBrandService {


    @Autowired
    private EbBrandDao brandDao;

    public void saveBrand(EbBrand brand) {
        brandDao.saveBrand(brand);

    }

    public EbBrand getBrandById(Long brandId) {
        return brandDao.getBrandById(brandId);
    }

    public void updateBrand(EbBrand brand) {

        brandDao.updateBrand(brand);

    }
    public void deleteBrand(Long brandId) {

        brandDao.deleteBrand(brandId);

    }
    public List<EbBrand> selectBrand() {
        return brandDao.selectBrand();
    }
    public List<EbBrand> selectBrandByName(String brandName) {
        return brandDao.selectBrandByName(brandName);
    }

}

测试Service

在idea中，我们新建一个test目录

对着我们的serviceImpl使用快捷键ctrl+shift+t

idea就会帮我们自动把想要测试的方法把相关的目录创建出来了

我们在插入数据的时候，记得要改写SQL语句，因为默认是没有主键的。下面就是我们把在主键列上使用自动增长

<insert id="insert" parameterType="com.rl.ecps.model.EbBrand" >

    <selectKey keyProperty="brandId" order="BEFORE" resultType="long">
      select seqbrandid.nextval from dual
    </selectKey>


    insert into EB_BRAND (BRAND_ID, BRAND_NAME, BRAND_DESC, 
      IMGS, WEBSITE, BRAND_SORT
      )
    values (#{brandId,jdbcType=DECIMAL}, #{brandName,jdbcType=VARCHAR}, #{brandDesc,jdbcType=VARCHAR}, 
      #{imgs,jdbcType=VARCHAR}, #{website,jdbcType=VARCHAR}, #{brandSort,jdbcType=DECIMAL}
      )
  </insert>

插入成功