移動商城第三篇【搭建Mybatis和Spring環境、編寫Dao、Service在Core模塊】

Mybatis和Spring環境搭建

因爲咱們的所編寫的dao層、service代碼可能前臺和後臺都須要用到的，所以咱們把環境搭建在core模塊中

逆向工程

首先，咱們要作的就是品牌管理，咱們首先來看看原型界面的的品牌管理

涉及到的數據庫表在咱們的powerdesigner中就已經定義過了

咱們來看一下對應數據庫表的數據

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>

編寫逆向工程文件

<?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的驅動包的路徑 千萬別放中文路徑下 -->
    <classPathEntry location="F:\傳智168期JAVA\傳智168期JAVA\移動商城\shoprepository\shoprepository\repository\com\oracle\ojdbc14\10.2.0.2.0\ojdbc14-10.2.0.2.0.jar" />

    <!-- 配置數據源和生成的代碼所存放的位置 -->
    <context id="context1">

        <commentGenerator>
            <!-- 是否取消註釋 -->
            <property name="suppressAllComments" value="true" />
            <!-- 是否生成註釋代時間戳 -->
            <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" />
        <!-- 所生成的實體類的位置默認資源包src -->
        <javaModelGenerator targetPackage="com.rl.ecps.model" targetProject="src/main/java" />
        <!-- 所生成的sqlMap的影射文件的位置,默認資源包src -->
        <sqlMapGenerator targetPackage="com.rl.ecps.sqlMap" targetProject="src/main/java" />

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

生成的文件：

sqlMapping映射文件也算是一種資源文件把，所以我把它移到resources中了

編寫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>

建立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"> <!--開啓註解--> <context:component-scan base-package="com.rl.ecps"/> <!--配置鏈接池--> <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> <!--配置事務管理器--> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!--配置事務具體方法--> <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層

編寫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);
}

編寫Dao實現

/** * 繼承SqlSessionDaoSupport可以獲得sessionFactory的引用，很是方便！ */
@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的區別： * 一個是動態SQL，一個是靜態SQL。這裏就使用動態SQL比較好。由於是更新操做 */
        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插件只有最後兩個方法沒有幫咱們自動生成，其餘的SQL語句都自動生成了。

<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>

---

編寫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實現

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);
    }

}

測試Service

在idea中，咱們新建一個test目錄

對着咱們的serviceImpl使用快捷鍵ctrl+shift+t

idea就會幫咱們自動把想要測試的方法把相關的目錄建立出來了

咱們在插入數據的時候，記得要改寫SQL語句，由於默認是沒有主鍵的。下面就是咱們把在主鍵列上使用自動增加

<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