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

向右看齐 2021-09-17 07:36 274阅读 0赞

# 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

![这里写图片描述][SouthEast]

涉及到的数据库表在我们的powerdesigner中就已经定义过了

![这里写图片描述][SouthEast 1]

我们来看一下对应数据库表的数据

![这里写图片描述][SouthEast 2]

### **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>
        
        <classPathEntry location="F:\传智168期JAVA\传智168期JAVA\移动商城\shoprepository\shoprepository\repository\com\oracle\ojdbc14\10.2.0.2.0\ojdbc14-10.2.0.2.0.jar" />
    
        
        <context id="context1">
    
            <commentGenerator>
                
                <property name="suppressAllComments" value="true" />
                
                <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" />
            
            <javaModelGenerator targetPackage="com.rl.ecps.model" targetProject="src/main/java" />
            
            <sqlMapGenerator targetPackage="com.rl.ecps.sqlMap" targetProject="src/main/java" />
    
            
            <table schema="" tableName="eb_brand" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" >
            </table>
        </context>
    </generatorConfiguration>

生成的文件：

![这里写图片描述][SouthEast 3]

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

![这里写图片描述][SouthEast 4]

## 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">  <context:component-scan base-package="com.rl.ecps"/>  <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>  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:sqlMapConfig.xml"></property> </bean>  <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean>  <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>  <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

![这里写图片描述][SouthEast 5]

对着我们的serviceImpl使用快捷键ctrl+shift+t

![这里写图片描述][SouthEast 6]

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

![这里写图片描述][SouthEast 7]

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

![这里写图片描述][SouthEast 8]

[SouthEast]: /images/20210827/0e83ea997be34028aab6dad035412197.png
[SouthEast 1]: /images/20210827/be02f84fb64c4bbaa42a1cd42306fc71.png
[SouthEast 2]: /images/20210827/080a694a14044350b82a7b4c9182af62.png
[SouthEast 3]: /images/20210827/32e8c0385f0747bb8a6de4c7982b5d1c.png
[SouthEast 4]: /images/20210827/b9665a0f37834e70ab286e4ffaee4077.png
[SouthEast 5]: /images/20210827/77720bf560ce44d8aaeeda1e11e5a6f8.png
[SouthEast 6]: /images/20210827/5c653e3d10334c1aaa51ab9428a220f6.png
[SouthEast 7]: /images/20210827/0551bacab2e64c09a1220132755f5336.png
[SouthEast 8]: /images/20210827/d5594028c2f64d879b2e2f4d44235dc1.png