spring集成mybatis

1、新建一个javaEE web项目

2、加入相关依赖的坐标

<dependencies>
    
    
    <dependency>
        <groupId>mysqlgroupId>
        <artifactId>mysql-connector-javaartifactId>
        <version>8.0.16version>
    dependency>
    <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatisartifactId>
        <version>3.4.2version>
    dependency>
    
    <dependency>
        <groupId>com.alibabagroupId>
        <artifactId>druidartifactId>
        <version>1.1.10version>
    dependency>
    <dependency>
        <groupId>junitgroupId>
        <artifactId>junitartifactId>
        <version>4.12version>
        <scope>providedscope>
    dependency>
    
    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-contextartifactId>
        <version>5.2.2.RELEASEversion>
    dependency>
    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-jdbcartifactId>
        <version>5.2.2.RELEASEversion>
    dependency>
    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-aspectsartifactId>
        <version>5.2.2.RELEASEversion>
    dependency>
dependencies>

3、创建相应的包和类，以登录为例

package com.ffyc.ssm.model;
 
import lombok.Data;
import org.springframework.format.annotation.DateTimeFormat;
 
import java.util.Date;
@Data
public class Admin {
    private Integer id;
    private String account;
    private String password;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date birthday;
}

    org.projectlombok
    lombok
    1.18.4
    provided

@Data注解在类上，会为类的所有属性自动生成setter/getter、equals、canEqual、hashCode、toString方法，如为final属性，则不会为该属性生成setter方法。

@Service(value = "loginService")
@Transactional
public class LoginService {
    //注入dao层对象
    @Autowired
    LoginDao loginDao;//注入的直接是接口的代理对象sqlsession.getMapper();
 
    public Admin login(Admin admin){
        Admin a=loginDao.Login(admin);
        return a;
    }
}

@Repository
public interface LoginDao {
    public Admin Login(Admin admin);
}

"1.0" encoding="UTF-8"?>
"-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
"com.ffyc.ssm.dao.LoginDao">
 
    "Login" resultType="com.ffyc.ssm.model.Admin">
        select * from admin where account=#{account} and password=#{password}
    

4、创建并配置spring和mybatis配置文件

1.mybatis配置文件（mybatis-config.xml）

"1.0" encoding="UTF-8" ?>
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
     
        
        "logImpl" value="STDOUT_LOGGING"/>
        "mapUnderscoreToCamelCase" value="true"/>
        "cacheEnabled" value="true"/>  
    
 
     
        <package name="com.ffyc.ssm.model"/>
    

2.数据库连接配置

mybatis-config.xml

classDriverName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/ssmdb?serverTimezone=Asia/Shanghai
uname=root
pwd=123456

db.xml

"1.0" encoding="UTF-8"?>
"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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://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">
 
    
    
    "classpath:config.properties">
    
    "dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        "driverClassName" value="${classDriverName}">
        "url" value="${url}">
        "username" value="${uname}">
        "password" value="${pwd}">
        "initialSize" value="5">
        "maxActive" value="10">
    
 
    
    "transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        "dataSource" ref="dataSource">
    
 
    
    "transactionManager"/>

3.spring集成mybatis

Spring 集成 Mybatis 其核心是将 SqlSessionFactory 交由 Spring 管理，并由 Spring 管理对 dao 接口的代理实现。

3.1 导入 mybatis jar 包

<dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatis-springartifactId>
    <version>1.3.1version>
dependency>

3.2 配置 sqlSessionFactory，spring-mybatis.xml中

"1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd">
 
    
    <import resource="classpath:db.xml">import> 
 
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="dataSource" ref="dataSource">property>
        
        <property name="configLocation" value="classpath:mybatis-config.xml">property>
        
        <property name="mapperLocations" value="classpath:mappers/*Mapper.xml">
        property>
    bean>
 
    
    <bean id="mapperFactory" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ffyc.ssm.dao">property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory">
        property>
    bean>
beans>

4.spring.xml

spring.xml中需要导入spring-mybatis.xml，spring-mybatis.xml中导入db.xml

"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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://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/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    
    <context:component-scan base-package="com.ffyc.ssm"> context:component-scan>
 
    
    <aop:aspectj-autoproxy />
 
    
    <import resource="classpath:spring-mybatis.xml">import>
 
 
beans>

5、测试

public class Test {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext app=new ClassPathXmlApplicationContext("spring.xml");
        LoginService loginService=app.getBean("loginService",LoginService.class);
        Admin admin=new Admin();
        admin.setAccount("admin");
        admin.setPassword("admin");
        Admin a=loginService.login(admin);
        System.out.println(a);
    }
}