集成Mybatis
1、导入依赖
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.2</version>
</dependency>
2、创建Mapper接口以及xml文件
将Spring容器管理Mapper接口的两种方式：
1、在Mapper接口上添加@Mapper
@Mapper
public interface UserMapper {
2、在入口类上添加@MapperScan
@SpringBootApplication
@MapperScan(basePackages = "com.dyf.springbootmybatis.mapper")
public class SpringBootMybatisApplication {
编译xml文件的两种方式：
1、xml文件放在java目录下时，需要在pom文件下添加
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</build>
2、放在resources目录下时，需要在application.yml配置文件中指定
mybatis:
mapper-locations: classpath:mapper/*.xml
3、添加数据库配置
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost/cloud_user
username: root
password: "0416"
4、示例文件
application.yml
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost/cloud_user
username: root
password: "0416"
mybatis:
mapper-locations: classpath:mapper/*.xml
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 https://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>2.7.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.dyf</groupId>
<artifactId>springBoot-mybatis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.4.1</version>
<configuration>
<configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
入口类
@SpringBootApplication
@MapperScan(basePackages = "com.dyf.springbootmybatis.mapper")
public class SpringBootMybatisApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootMybatisApplication.class, args);
}
}
Mybatis逆向工程
1、添加插件
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.4.1</version>
<configuration>
<configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
2、创建generatorConfig.xml文件
generatorConfig.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<properties resource="config.properties"/>
<!-- JDBC驱动包 -->
<classPathEntry location="E:\Program\Maven\repository\mysql\mysql-connector-java\8.0.30\mysql-connector-java-8.0.30.jar"/>
<!-- 配置table表信息内容体，targetRuntime：指定采用Mybatis3的版本 -->
<context id="Mysql" targetRuntime="MyBatis3" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<!--支持序列化-->
<plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
<commentGenerator>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接信息 -->
<jdbcConnection driverClass="${jdbc.driverClass}"
connectionURL="${jdbc.url}"
userId="${jdbc.user}"
password="${jdbc.password}">
</jdbcConnection>
<!-- 生成的model类，targetPackage：指定model类的包名，targetProject：指定生成的model放在哪个项目下面 -->
<javaModelGenerator targetPackage="${targetModelPackage}" targetProject="${targetJavaProject}">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 生成Mybatis的Mapper.xml文件，targetPackage指定mapper.xml文件的包名，targetProject：指定生成的mapper.xml放在哪个项目下面 -->
<sqlMapGenerator targetPackage="${targetXMLPackage}" targetProject="${targetResourcesProject}">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- 生成Mybatis的Mapper接口类文件，targetPackage：指定Mapper接口类的包名 -->
<javaClientGenerator targetPackage="${targetMapperPackage}" targetProject="${targetJavaProject}" type="XMLMAPPER">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!--以下example为false，表示不会生成example类，否则将自动生成example类-->
<!-- 指定数据库表 -->
<table tableName="tb_user"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false"
domainObjectName="User"/>
<!-- <table tableName="menu" domainObjectName="Menu"/>-->
</context>
</generatorConfiguration>
config.properties
#数据库配置
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost/cloud_user
jdbc.user=root
jdbc.password=0416
# 生成文件保存位置
# model类生成的位置
targetModelPackage=com.dyf.springbootmybatis.entity
# mapper.xml生成的位置
targetXMLPackage=mapper
# mapper接口生成的位置
targetMapperPackage=com.dyf.springbootmybatis.mapper
targetJavaProject=src/main/java
targetResourcesProject=src/main/resources
3、运行
