Spring Boot集成Mybatis

集成Mybatis

1、导入依赖

<dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <scope>runtimescope>
dependency>

<dependency>
    <groupId>org.mybatis.spring.bootgroupId>
    <artifactId>mybatis-spring-boot-starterartifactId>
    <version>2.2.2version>
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/javadirectory>
            <includes>
                <include>**/*.xmlinclude>
            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

<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>4.0.0modelVersion>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.7.3version>
        <relativePath/> 
    parent>

    <groupId>com.dyfgroupId>
    <artifactId>springBoot-mybatisartifactId>
    <version>0.0.1-SNAPSHOTversion>

    <properties>
        <java.version>1.8java.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <scope>runtimescope>
        dependency>

        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>2.2.2version>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generatorgroupId>
                <artifactId>mybatis-generator-maven-pluginartifactId>
                <version>1.4.1version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generatorConfig.xmlconfigurationFile>
                    <overwrite>trueoverwrite>
                    <verbose>trueverbose>
                configuration>
            plugin>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            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.generatorgroupId>
        <artifactId>mybatis-generator-maven-pluginartifactId>
        <version>1.4.1version>
        <configuration>
            <configurationFile>${basedir}/src/main/resources/generatorConfig.xmlconfigurationFile>
            <overwrite>trueoverwrite>
            <verbose>trueverbose>
        configuration>
    plugin>
plugins>

2、创建generatorConfig.xml文件

generatorConfig.xml

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"/>

    
    <classPathEntry location="E:\Program\Maven\repository\mysql\mysql-connector-java\8.0.30\mysql-connector-java-8.0.30.jar"/>

    
    <context id="Mysql" targetRuntime="MyBatis3" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>

        <commentGenerator>
            
            <property name="suppressAllComments" value="true" />
        commentGenerator>

        
        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.url}"
                        userId="${jdbc.user}"
                        password="${jdbc.password}">
        jdbcConnection>

        
        <javaModelGenerator targetPackage="${targetModelPackage}" targetProject="${targetJavaProject}">
            
            <property name="enableSubPackages" value="false" />
            
            <property name="trimStrings" value="true" />
        javaModelGenerator>

        
        <sqlMapGenerator targetPackage="${targetXMLPackage}" targetProject="${targetResourcesProject}">
            
            <property name="enableSubPackages" value="false" />
        sqlMapGenerator>

        
        <javaClientGenerator targetPackage="${targetMapperPackage}" targetProject="${targetJavaProject}" type="XMLMAPPER">
            
            <property name="enableSubPackages" value="false" />
        javaClientGenerator>

        
        
        <table tableName="tb_user"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"
               domainObjectName="User"/>

    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