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Spring(16):新增功能:在超市订单系统中实现订单表的查询(采用MapperFactoryBean)

2018-01-02 21:12 567 查看
2018/1/2

功能描述:

(1)实现按条件查询订单表Bill,查询条件如下:

1 商品名称 2 供应商  3  是否付款

(2)结果列显示如下:

订单编码、商品名称、供应商名称、账单金额、是否付款、创建时间

(3)使用resultMap做显示列表字段的自定义映射,

(4)采用MapperFactoryBean;

以下是解决思路和过程;

【0】文件框架和jar包:



图1



图2

【1】新功能肯定有新的实体类,在\com\smbms\entities包下,新建Bill.java:

(留意 providerName 属性,为什么会出现呢?在下面的传参步骤【6】讲到)

package com.smbms.entities;

import java.util.Date;

public class Bill {
private Integer id;
private String billCode;
private String produceName;
private String productDesc;
private String productUnit;
private Integer productCount;
private Integer totalPrice ;
private Integer isPayment ;
private Integer providerId;
private Integer createBy;//userId
private Date creationDate;
private Integer modifyBy;//userId
private Date modifyDate;
private String providerName;

public String getProviderName() {
return providerName;
}
public void setProviderName(String providerName) {
this.providerName = providerName;
}
public Bill() {}
public Bill(Integer id, String billCode, String produceName, String productDesc, String productUnit,
Integer productCount, Integer totalPrice, Integer isPayment, Integer providerId, Integer createBy,
Date creationDate, Integer modifyBy, Date modifyDate) {
super();
this.id = id;
this.billCode = billCode;
this.produceName = produceName;
this.productDesc = productDesc;
this.productUnit = productUnit;
this.productCount = productCount;
this.totalPrice = totalPrice;
this.isPayment = isPayment;
this.providerId = providerId;
this.createBy = createBy;
this.creationDate = creationDate;
this.modifyBy = modifyBy;
this.modifyDate = modifyDate;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getBillCode() {
return billCode;
}
public void setBillCode(String billCode) {
this.billCode = billCode;
}
public String getProductDesc() {
return productDesc;
}
public void setProductDesc(String productDesc) {
this.productDesc = productDesc;
}
public String getProductUnit() {
return productUnit;
}
public void setProductUnit(String productUnit) {
this.productUnit = productUnit;
}
public Integer getProductCount() {
return productCount;
}
public void setProductCount(Integer productCount) {
this.productCount = productCount;
}
public Integer getTotalPrice() {
return totalPrice;
}
public void setTotalPrice(Integer totalPrice) {
this.totalPrice = totalPrice;
}
public Integer getIsPayment() {
return isPayment;
}
public void setIsPayment(Integer isPayment) {
this.isPayment = isPayment;
}
public Integer getProviderId() {
return providerId;
}
public void setProviderId(Integer providerId) {
this.providerId = providerId;
}
public Integer getCreateBy() {
return createBy;
}
public void setCreateBy(Integer createBy) {
this.createBy = createBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public Integer getModifyBy() {
return modifyBy;
}
public void setModifyBy(Integer modifyBy) {
this.modifyBy = modifyBy;
}
public Date getModifyDate() {
return modifyDate;
}
public void setModifyDate(Date modifyDate) {
this.modifyDate = modifyDate;
}
@Override
public String toString() {
return "Bill [id=" + id + ", billCode=" + billCode + ", produceName=" + produceName + ", productDesc="
+ productDesc + ", productUnit=" + productUnit + ", productCount=" + productCount + ", totalPrice="
+ totalPrice + ", isPayment=" + isPayment + ", providerId=" + providerId + ", createBy=" + createBy
+ ", creationDate=" + creationDate + ", modifyBy=" + modifyBy + ", modifyDate=" + modifyDate + "]";
}
public String getProduceName() {
return produceName;
}
public void setProduceName(String produceName) {
this.produceName = produceName;
}

}


【2】在\com\smbms\dao 包,新建接口文件 BillMapper.java:
package com.smbms.dao;

import java.util.List;
import java.util.Map;

import com.smbms.entities.Bill;

public interface BillMapper {
public List<Bill> billShow();
// public List<Bill> billShowByCondition(Map<String,String> billMap);//注释掉这行
public List<Bill> billShowByCondition(Bill bill);
}


【3】在\com\smbms\dao 包,新建sql映射文件 BillMapper.xml:
(使用select 标签,以及resultMap标签)
<?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.smbms.dao.BillMapper">
<select id="billShow" resultType="com.smbms.entities.Bill">
select * from smbms_bill
</select>

<select id="billShowByCondition" resultMap="resultSet"
parameterType="com.smbms.entities.Bill">
select b.billCode,b.produceName,p.proName,b.totalPrice,b.isPayment,b.creationDate from smbms_bill b,smbms_provider p
where b.produceName=#{produceName}
and b.providerId=#{providerId}
and b.isPayment=#{isPayment}
and b.providerId=p.id
</select>
<resultMap type="com.smbms.entities.Bill" id="resultSet">
<result property="billCode" column="billCode"/>
<result property="produceName" column="produceName"/>
<result property="totalPrice" column="totalPrice"/>
<result property="isPayment" column="isPayment"/>
<result property="creationDate" column="creationDate"/>
</resultMap>
</mapper>
【4】因为使用了MapperFactoryBean,故而不需要添加接口文件 BillMapper.java的实现类,只需要简单的在Spring配置文件添加几行配置,
(当然前提是 将数据源、sqlSessionfactory也配置好了):
配置文件 applicationContext-mybatis.xml,路径在src源文件下:

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<!-- 数据源配置 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url">
<value><![CDATA[jdbc:mysql://127.0.0.1:3306/test?
useUnicode=true&characterEncoding=utf-8]]></value>
</property>
<property name="username" value="root"></property>
<property name="password" value=""></property>
</bean>

<!-- SqlSessionFactoryBean 配置 -->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 引用数据源组件 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 引用Mybatis配置文件的配置 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>

<!-- 配置DAO-bill,使用 MapperFactoryBean 注册映射器实现 -->
<bean id="billMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.smbms.dao.BillMapper"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>

</beans>


以上,DAO层的实现由配置文件的Bean标签实现了,从而可以被Service层组装使用。

【5】Service层接口文件、实现类以及配置信息:
在\com\smbms\service包 , 新建接口文件BillService.java:

package com.smbms.service;

import java.util.List;
import java.util.Map;

import com.smbms.entities.Bill;

public interface BillService {
public List<Bill> findBillsWithConditions();
public List<Bill> findBillsWithConditionsByThressConditions(Bill bill);

}


在\com\smbms\service包 , 新建接口实现类BillServiceImpl.java:
package com.smbms.service;

import java.util.List;
import java.util.Map;

import com.smbms.dao.BillMapper;
import com.smbms.entities.Bill;

public class BillServiceImpl implements BillService {
private BillMapper billMapper;

@Override
public List<Bill> findBillsWithConditions() {
return billMapper.billShow();
}

@Override
public List<Bill> findBillsWithConditionsByThressConditions(Bill bill) {
return billMapper.billShowByCondition(bill);
}

public BillServiceImpl() {}

public BillServiceImpl(BillMapper billMapper) {
this.billMapper = billMapper;
}

}


配置文件 applicationContext-mybatis.xml添加以下信息,路径在src源文件下:
<!-- 配置bill业务Bean ,构造器注入,一定要有带参构造函数-->
<bean id="billService" class="com.smbms.service.BillServiceImpl">
<constructor-arg name="billMapper" ref="billMapper" ></constructor-arg>
</bean>
【6】编写单元测试BillServiceImplTest.java:
package com.smbms.service;

import java.util.List;

import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.smbms.entities.Bill;

public class BillServiceImplTest {

@Test
public void test() {
System.out.println("start..");
System.out.println("----------------1----------------");
@SuppressWarnings("resource")
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext-mybatis.xml");
BillService billService = (BillService)ctx.getBean("billService");
List<Bill> bills = billService.findBillsWithConditions();
for(Bill b:bills){
System.out.println(b.toString());
}
System.out.println("--------------2-----------");
// HashMap<String, String> billMap = new HashMap<String,String>();
// billMap.put("produceName", "apple");
// billMap.put("providerId","1");
// billMap.put("isPayment", "2");
Bill bill = new Bill();
bill.setProviderId(1);
bill.setProduceName("apple");
bill.setIsPayment(2);
bills = billService.findBillsWithConditionsByThressConditions(bill);
for(Bill b:bills){
System.out.println(b.toString());
}
}

}


这样,所有工作都完成了。

【7】输出结果:
DEBUG 01-02 20:54:44,099 JDBC Connection [jdbc:mysql://127.0.0.1:3306/test?
useUnicode=true&characterEncoding=utf-8, UserName=root@localhost, MySQL Connector Java] will not be managed by Spring (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,132 ==> Preparing: select * from smbms_bill (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,212 ==> Parameters: (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,741 <== Columns: id, billCode, produceName, produceDesc, produceUint, produceCount, totalPrice, isPayment, createBy, creationDate, modifyBy, modifyDate, providerId (JakartaCommonsLoggingImpl.java:59)
DEBUG 01-02 20:54:44,742 <== Row: 1, 001, apple, fruit, individual, 100.00, 100.00, 2, 1, 2018-01-02 11:09:20.0, null, null, 1 (JakartaCommonsLoggingImpl.java:59)
DEBUG 01-02 20:54:44,769 <== Row: 2, 002, banana, fruit, individual, 200.00, 100.00, 2, 1, 2018-01-02 11:26:10.0, null, null, 1 (JakartaCommonsLoggingImpl.java:59)
DEBUG 01-02 20:54:44,770 <== Total: 2 (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,773 Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@5c33f1a9] (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,774 Returning JDBC Connection to DataSource (DataSourceUtils.java:327)
Bill [id=1, billCode=001, produceName=apple, productDesc=null, productUnit=null, productCount=null, totalPrice=100, isPayment=2, providerId=1, createBy=1, creationDate=Tue Jan 02 11:09:20 CST 2018, modifyBy=null, modifyDate=null]
Bill [id=2, billCode=002, produceName=banana, productDesc=null, productUnit=null, productCount=null, totalPrice=100, isPayment=2, providerId=1, createBy=1, creationDate=Tue Jan 02 11:26:10 CST 2018, modifyBy=null, modifyDate=null]
--------------2-----------
DEBUG 01-02 20:54:44,775 Creating a new SqlSession (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,775 SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@37883b97] was not registered for synchronization because synchronization is not active (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,776 Fetching JDBC Connection from DataSource (DataSourceUtils.java:110)
DEBUG 01-02 20:54:44,777 JDBC Connection [jdbc:mysql://127.0.0.1:3306/test?
useUnicode=true&characterEncoding=utf-8, UserName=root@localhost, MySQL Connector Java] will not be managed by Spring (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,777 ==> Preparing: select b.billCode,b.produceName,p.proName,b.totalPrice,b.isPayment,b.creationDate from smbms_bill b,smbms_provider p where b.produceName=? and b.providerId=? and b.isPayment=? and b.providerId=p.id (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,778 ==> Parameters: apple(String), 1(Integer), 2(Integer) (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,870 <== Columns: billCode, produceName, proName, totalPrice, isPayment, creationDate (JakartaCommonsLoggingImpl.java:59)
DEBUG 01-02 20:54:44,872 <== Row: 001, apple, JingDong, 100.00, 2, 2018-01-02 11:09:20.0 (JakartaCommonsLoggingImpl.java:59)
DEBUG 01-02 20:54:44,874 <== Total: 1 (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,875 Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@37883b97] (JakartaCommonsLoggingImpl.java:54)
DEBUG 01-02 20:54:44,875 Returning JDBC Connection to DataSource (DataSourceUtils.java:327)
Bill [id=null, billCode=001, produceName=apple, productDesc=null, productUnit=null, productCount=null, totalPrice=100, isPayment=2, providerId=null, createBy=null, creationDate=Tue Jan 02 11:09:20 CST 2018, modifyBy=null, modifyDate=null]


【8】要点解释:
1、在上面的代码可以看到,我还试了一下Map作为传参,这个也是可以的。
2、但我最后选择使用Bill对象传参,这样的好处是在返回值时,直接对应了设定的对象,例如数据库的smbms_bill表并没有peoviderName这一字段,但是返回值利用resultMap,将另一个表的column 字段'providerName' 对应了Bill对象的peoviderName参数。方便最后的显示打印。

【9】工程说明.txt:
(1)这是Mybatis和Spring整合练习的工程;
(2)实际使用有3个包:dao、entities、service;
(3)Mybatis配置文件内容很简洁,Spring完成大部分配置管理;
(4)通过SQLSessionTemplate的实现类对数据库进行操作;
(5)配置DAO组件并进入SqlSessionTemplate实例;
(6)配置业务Bean并注入DAO实例 ;

(7)完成的功能是:查询provider的列表,模糊查询供应商信息;
(8)与smbms05MybatisSpring的区别:去掉了实现类ProviderMapperImpl;仅仅保留ProviderMapper
接口和相关SQL映射文件,通过MapperFactoryBean注入给业务组件。

(9)此外,也新增了一个User查询,照壶画瓢;
(10)smbms06是使用MapperFactoryBean注入映射器,
而smbms07是更加方便的使用MapperScannerConfigurer注入映射器。

(11)smbms08增加新功能,实现按条件查询订单表Bill;使用resultMap做显示列表字段的自定义映射,
使用Map传参,
采用MapperFactoryBean注册映射器实现。
[bill 和 provider 表]

此外,可以使用采用MapperScannerConfigurer映射器改进,可以参考下一篇博文:《Spring(17):新增功能:在超市订单系统中实现订单表的查询(采用MapperScannerConfigurer)》
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