Spring Boot中使用Mybatis

一、步骤

• 导入依赖：MySQL驱动、Druid依赖、MyBatis与Spring Boot整合依赖、Lombok依赖
• 在Service接口实现类上添加@Service注解
• 在Dao接口上添加@Mapper注解
• 在pom中将dao目录注册为资源目录
• 在配置文件中注册映射文件、实体类别名，及数据源

二、需求

完成一个简单注册功能

三、定义工程

四、导入依赖

修改pom.xml配置,导入三个依赖：mybatis与Spring Boot整合依赖、mysql驱动依赖与Druid数据源依赖。

<?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>org.springframework.boot</groupId>





		<artifactId>spring-boot-starter-parent</artifactId>





		<version>2.1.6.RELEASE</version>





		<relativePath/> <!-- lookup parent from repository -->





	</parent>





	<groupId>com.sping.boot.demo</groupId>





	<artifactId>01-primary</artifactId>





	<version>0.0.1-SNAPSHOT</version>





	<name>01-primary</name>





	<description>Demo project for Spring Boot</description>





 





	<properties>





		<java.version>1.8</java.version>





	</properties>





 





	<dependencies>





		<!--mybatis与spring boot整合依赖-->





		<dependency>





			<groupId>org.mybatis.spring.boot</groupId>





			<artifactId>mybatis-spring-boot-starter</artifactId>





			<version>1.3.2</version>





		</dependency>





 





		<!--mysql驱动-->





		<dependency>





			<groupId>mysql</groupId>





			<artifactId>mysql-connector-java</artifactId>





			<version>5.1.47</version>





		</dependency>





 





		<!-- druid驱动 -->





		<dependency>





			<groupId>com.alibaba</groupId>





			<artifactId>druid</artifactId>





			<version>1.1.12</version>





		</dependency>





 





		<!--tomcat内置的JSP解析器-->





		<dependency>





			<groupId>org.apache.tomcat.embed</groupId>





			<artifactId>tomcat-embed-jasper</artifactId>





		</dependency>





 





		<!--lombok-->





		<dependency>





			<groupId>org.projectlombok</groupId>





			<artifactId>lombok</artifactId>





		</dependency>





 





		<dependency>





			<groupId>org.springframework.boot</groupId>





			<artifactId>spring-boot-starter-web</artifactId>





		</dependency>





 





		<dependency>





			<groupId>org.springframework.boot</groupId>





			<artifactId>spring-boot-starter-test</artifactId>





			<scope>test</scope>





		</dependency>





	</dependencies>





 





 





	<build>





		<resources>





			<!--注册Dao包目录下Mybatis映射文件资源目录-->





			<resource>





				<directory>src/main/java</directory>





				<includes>





					<include>**/*.xml</include>





				</includes>





			</resource>





 





			<!--注册webapp目录为资源目录-->





			<resource>





				<directory>src/main/webapp</directory>





				<targetPath>META-INF/resources</targetPath>





				<includes>





					<include>**/*.*</include>





				</includes>





			</resource>





		</resources>





 





		<plugins>





			<plugin>





				<groupId>org.springframework.boot</groupId>





				<artifactId>spring-boot-maven-plugin</artifactId>





			</plugin>





		</plugins>





	</build>





 





</project>

五、创建控制层

五、定义Service接口及实现类

六、定义实体类及DB表

七、定义DB表

八、定义Dao接口

Dao接口上要添加@Mapper注解

九、定义映射文件

十、修改主配置文件

在主配置文件中主要完成以下几件工作

• 注册映射文件
• 注册实体类别名
• 注册数据源

# 视图的前辍与后辍





spring:





  mvc:





    view:





      prefix: /





      suffix: .jsp





 





  # 注册数据源





  datasource:





    type: com.alibaba.druid.pool.DruidDataSource





    driver-class-name: com.mysql.jdbc.Driver





    url: jdbc:mysql:///test?useUnicode=true&characterEncoding=utf-8





    username: root





    password: root





 





mybatis:





  # 注册映射文件





  mapper-locations: classpath:com/abc/dao/*.xml





  # 注册实体类别名





  type-aliases-package: com.abc.bean

十一、创建index.jsp

十二、创建welcome.jsp

jsp/welcome.jsp目录

十三、测试