Spring整合MyBatis项目代码示例

1、创建如下结构的项目Spring_MyBatis

2、在pom.xml文件中添加以下依赖并刷新maven

<?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><parent><groupId>cn.fpl</groupId><artifactId>SpringDemo</artifactId><version>1.0-SNAPSHOT</version></parent><artifactId>Spring_MyBatis</artifactId><properties><!-- 项目源码及编译输出的编码 --><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><!-- 项目编译JDK版本 --><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target></properties><dependencies><!-- Spring常用依赖 --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.1.8.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>5.1.8.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>5.1.8.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.1.8.RELEASE</version></dependency><!-- MySql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version></dependency><!--连接池--><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.0</version></dependency><!--mybatis--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.3</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.3</version></dependency><!--日志--><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.26</version></dependency><!--junit--><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.1.8.RELEASE</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency></dependencies><build><resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource><resource><directory>src/main/resources</directory></resource></resources></build></project>

3、在resources文件夹下添加spring等配置文件（applicationContext.xml，db.properties，log4j.properties）

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><context:component-scan base-package="cn.fpl.service"></context:component-scan><!-- 加载配置文件--><context:property-placeholder location="classpath:db.properties" ></context:property-placeholder><!--    配置数据源--><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"><property name="driverClassName" value="${db.driver}"/><property name="url" value="${db.url}"/><property name="username" value="${db.user}"/><property name="password" value="${db.password}"/></bean><!--SqlSessionFactory--><bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property></bean><!--扫描basePackage所指定的包下的所有接口，生成代理类并交给spring的ioc容器管理--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--  mapper所在的包--><property name="basePackage" value="cn.fpl.mapper"></property><property name="sqlSessionFactoryBeanName" value="sessionFactory"></property></bean>
</beans>

db.properties

db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=utf8
db.user=root
db.password=

log4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

4、mapper层

UserMapper.java

package cn.fpl.mapper;import cn.fpl.pojo.User;public interface UserMapper {public void addUser(User user);
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.fpl.mapper.UserMapper"><insert id="addUser" parameterType="cn.fpl.pojo.User">insert into t_user(name,money) values(#{name},#{money})</insert>
</mapper>

5、pojo层

User.java

/** Copyright (c) 2020, 2024, fpl1116.cn All rights reserved.**/
package cn.fpl.pojo;/*** <p>Project: SpringDemo - User</p>* <p>Powered by fpl1116 On 2024-01-05 19:32:30</p>* <p>描述：<p>** @author fpl1116 [2391940642@qq.com]* @version 1.0* @since 1.8*/
public class User {private Integer id;private String name;private Float money;public User(String name, Float money) {this.name = name;this.money = 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 Float getMoney() {return money;}public void setMoney(Float money) {this.money = money;}
}

6、service层

UserService.java

public interface UserService {void addUser(User user);
}

UserServiceImpl.java

@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserMapper userMapper;@Overridepublic void addUser(User user){userMapper.addUser(user);}}

7、web层

Client.java

package cn.fpl.web;import cn.fpl.pojo.User;
import cn.fpl.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class Client {public static void main(String[] args) {ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");UserService userService = ac.getBean("userServiceImpl", UserService.class);userService.addUser(new User("张三丰",4000F));userService.addUser(new User("宋远桥",2000F));}
}

8、建立数据库spring

CREATE TABLE `t_user` (`id` int(11) NOT NULL AUTO_INCREMENT,`name` varchar(255) DEFAULT NULL,`money` float DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=utf8;

9、运行结果如下