*一、 在resource文件夹下创建generatorConfig.xml文件，datasource.properties文件并且修改application.yml文件

• generatorConfig.xml文件

<?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>
    <!--导入属性配置-->
    <properties resource="datasource.properties"></properties>

    <!--指定特定数据库的jdbc驱动jar包的位置-->
    <classPathEntry location="${db.driverLocation}"/>

    <context id="default" targetRuntime="MyBatis3">

        <!-- optional，旨在创建class时，对注释进行控制 -->
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--jdbc的数据库连接 -->
        <jdbcConnection
                driverClass="${db.driverClassName}"
                connectionURL="${db.url}"
                userId="${db.username}"
                password="${db.password}">
        </jdbcConnection>


        <!-- 非必需，类型处理器，在数据库类型和java类型之间的转换控制-->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        
        <!-- targetPackage：entity生成的位置 -->
        <javaModelGenerator targetPackage="com.mengmaec.ecuser.entity" targetProject="./src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加 构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否对类CHAR类型的列的数据进行trim操作 -->
            <property name="trimStrings" value="true"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!--mapper映射文件生成所在的目录 为每一个数据库的表生成对应的SqlMap文件 -->
        <!--<sqlMapGenerator targetPackage="mappers" targetProject=".\src\main\resources">-->
        <sqlMapGenerator targetPackage="mappers" targetProject="./src/main/resources">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- targetPackage：mapper接口dao生成的位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.mengmaec.ecuser.dao" targetProject="./src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>

        <!-- 数据库表名 tableName="mmall_user"   生成的类名 domainObjectName="User"-->
        <table tableName="mmall_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
        
    </context>
</generatorConfiguration>

• datasource.properties文件

#自己的mysql-connector-java-5.1.46.jar位置
db.driverLocation =D:\\maven\\My_localRepositoty\\mysql\\mysql-connector-java\\5.1.46\\mysql-connector-java-5.1.46.jar
db.driverClassName = com.mysql.jdbc.Driver
#连接数据库
db.url = jdbc:mysql://127.0.0.1/goods?characterEncoding=utf-8
db.username = root
db.password = root

• application.yml文件

#端口号
server:
  port: 8686
#连接数据库
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1/goods?characterEncoding=utf-8
    username: root
    password: root

#名字
  application:
    name: user

#UserInfoMapper.xml 文件位置
mybatis:
  mapper-locations: classpath*:/mappers/*.xml

#打印日志
logging:
  level:
#  与包名一致
     com.mengma: debug

#注册到eureka
#eureka:
#  client:
#    service-url:
#      defaultZone: http://127.0.0.1:8762/eureka/

*二、引入依赖

<!--连接数据库-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

<!--mybatis-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>

*三、双击mybatis-generator：generate(如果没有就导入下方依赖)

image.png

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>

        </plugins>
    </build>