Spring——Spring整合MyBatis-编程知识

Spring整合MyBatis

1.创建工程

在这里插入图片描述

1.1.pom.xml

<?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.wt</groupId><artifactId>Spring_MyBatis</artifactId><version>1.0-SNAPSHOT</version><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></resources></build>
</project>

1.2.log4j.properties

log4j.rootLogger=DEBUG,A1log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%t] [%c]-[%p] %m%n

1.3.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="com.wt"></context:component-scan>
</beans>

2.配置数据源

2.1.db.properties

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=1111

2.2.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"><!--加载配置文件--><context:property-placeholder location="classpath:db.properties" /><!-- 配置数据源 --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"destroy-method="close"><property name="driverClassName" value="${jdbc.driverClass}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean>
</beans>

3.整合MyBatis

3.1.applicationContext.xml

<!--会话工厂-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"></property><property name="typeAliasesPackage" value="com.wt.pojo"></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管理-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--mapper所在的包--><property name="basePackage" value="com.wt.mapper"></property><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

4.测试

4.1.创建表

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;

4.2.pojo

package com.by.pojo;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 User() {}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;}
}

4.3.mapper

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

<?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="com.wt.mapper.UserMapper"><insert id="addUser" parameterType="User">insert into t_user(name,money) values(#{name},#{money})</insert>
</mapper>

4.4.service

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

4.5.junit

package com.by.test;import com.by.pojo.User;
import com.by.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")//加载配置文件
public class ServiceTest {@Autowiredprivate UserService userService;@Testpublic void testAdd(){userService.addUser(new User("张三丰",4000F));userService.addUser(new User("宋远桥",2000F));}
}