引入Spring前后对比

非spring环境

1.实体类与表

2.业务层接口与实现

3.数据层接口

4.Mybatis核心配置

5.Mybatis映射配置

6.客户端程序测试功能

spring环境

1.实体类与表

2.业务层接口与实现（提供数据层接口的注入操作）

3.数据层接口

4.Mybatis核心配置（交给spring控制，该文件省略）

5.Mybatis映射配置

6.客户端程序测试功能（使用spring方式获取bean）

7.Spring核心配置文件

8.Druid数据源的应用（可选）

9.Spring整合MyBatis

导入坐标

Spring坐标，MyBatis坐标，MySQL坐标，Druid坐标

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.itheima</groupId>
    <artifactId>Spring_day01_05_综合案例（spring整合mybatis）</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.3</version>
    </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.16</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
    </dependencies>

</project>

创建数据库表

CREATE TABLE account(id INT(20) PRIMARY KEY NOT NULL auto_increment, name varchar(16), money DOUBLE);
INSERT INTO account (name,money) VALUES ("Mike",888.88)
INSERT INTO account (name,money) VALUES  ("Jock",666.66)

Domain、DAO、Service

Domain

package com.itheima.domain;

import java.io.Serializable;

public class Account implements Serializable {

    private Integer id;
    private String name;
    private Double money;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

DAO

package com.itheima.dao;

import com.itheima.domain.Account;

import java.util.List;

public interface AccountDao {

    void save(Account account);

    void delete(Integer id);

    void update(Account account);

    List<Account> findAll();

    Account findById(Integer id);
}

Service

interface

package com.itheima.service;

import com.itheima.domain.Account;

import java.util.List;

public interface AccountService {

    void save(Account account);

    void delete(Integer id);

    void update(Account account);

    List<Account> findAll();

    Account findById(Integer id);

}

impl

package com.itheima.service.impl;


import com.itheima.dao.AccountDao;
import com.itheima.domain.Account;
import com.itheima.service.AccountService;

import java.util.List;

public class AccountServiceImpl implements AccountService {

    private AccountDao accountDao;

    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }

    public void save(Account account) {
        accountDao.save(account);
    }

    public void update(Account account){
        accountDao.update(account);
    }

    public void delete(Integer id) {
        accountDao.delete(id);
    }

    public Account findById(Integer id) {
        return accountDao.findById(id);
    }

    public List<Account> findAll() {
        return accountDao.findAll();
    }
}

Mapper.xml

src/main/resources/com/itheima/dao/AccountDao.xml

<?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.itheima.dao.AccountDao">

    <!--配置根据id查询-->
    <select id="findById" resultType="account" parameterType="int">
        select * from account where id = #{id}
    </select>

    <!--配置查询所有-->
    <select id="findAll" resultType="account">
        select * from account
    </select>

    <!--配置保存-->
    <insert id="save" parameterType="account">
        insert into account(name,money)values(#{name},#{money})
    </insert>

    <!--配置删除-->
    <delete id="delete" parameterType="int">
        delete from account where id = #{id}
    </delete>

    <!--配置更新-->
    <update id="update" parameterType="account">
        update account set name=#{name},money=#{money} where id=#{id}
    </update>
</mapper>

jdbc.properties

src/main/resources/jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.31.101:50000/spring_db
jdbc.username=root
jdbc.password=123456

applicationContext.xml

src/main/resources/applicationContext.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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!--加载perperties配置文件的信息-->
    <context:property-placeholder location="classpath:*.properties"/>

    <!--加载druid资源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--配置service作为spring的bean,并注入dao-->
    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"/>
    </bean>

    <!--spring整合mybatis后控制的创建连接SqlSession用的对象-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- domain别名配置，避免写全路径 -->
        <property name="typeAliasesPackage" value="com.itheima.domain"/>
    </bean>

    <!--加载mybatis映射配置的扫描，将其作为spring的bean进行管理-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.dao"/>
    </bean>



</beans>

测试

import com.itheima.domain.Account;
import com.itheima.service.AccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        AccountService accountService = (AccountService) ctx.getBean("accountService");
        Account ac = accountService.findById(2);
        System.out.println(ac);

//        Account account = new Account();
//        account.setName("Tom");
//        account.setMoney(123456.78);
//
//        accountService.save(account);

    }
}