1 MyBatis Generator官方参考文档

2 MyBatis Generator配置方式

注：这里使用的IDE为 idea

2.1 配置方式一

在resources文件夹下创建一个目录mybatis-generator，在目录mybatis-generator下创建文件generatorConfig.xml(此处的目录名可任意取)
注：图中generator.properties先不用建，这是配置方式二用到的
pom.xml中引入依赖(完整的pom.xml内容放在文末)

<plugin>
   <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.3.5</version>
    <configuration>
        <configurationFile>${basedir}/src/main/resources/mybatis-generator/generatorConfig.xml
        </configurationFile>
        <overwrite>true</overwrite>
        <verbose>true</verbose>
    </configuration>
</plugin>

配置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="mybatis-generator/generator.properties"/>
<!--    连接数据库jar包的路径-->
    <classPathEntry location="d:/java/JavaTools/mysql-connector-java-5.1.48/mysql-connector-java-5.1.48-bin.jar"/>
    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--数据库连接参数 -->
        <jdbcConnection
                driverClass="com.mysql.jdbc.Driver"
                connectionURL="jdbc:mysql://localhost:3306/booksys?serverTimezone=UTC&useSSL=true"
                userId="xxx"
                password="xxx">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 实体类的包名和存放路径 -->
        <javaModelGenerator targetPackage="com.fy.gen_test.domain" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成映射文件*.xml的位置-->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.fy.gen_test.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- tableName：数据库中的表名或视图名；domainObjectName：生成的实体类的类名-->
        <table tableName="book" domainObjectName="Book"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"/>
<!--        
        <table tableName="xxx" domainObjectName="xxx"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"/>
        ...
        <table tableName="xxx" domainObjectName="xxx"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"/>
-->                   
    </context>
</generatorConfiguration>

最后一步

2.2 配置方式二

此方式与配置方式一相比，略做改动即可

在配置在目录myBatis-generator下创建文件generator.properties

driverLocation=d:/java/JavaTools/mysql-connector-java-5.1.48/mysql-connector-java-5.1.48-bin.jar
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/booksys?serverTimezone=UTC&useSSL=true
username=xxx
password=xxx

修改文件generatorConfig.xml

2.3 配置方式三

pom.xml中引入依赖

<plugin>
   <groupId>org.mybatis.generator</groupId>
   <artifactId>mybatis-generator-maven-plugin</artifactId>
   <version>1.3.5</version>
    <!--    多了这个-->
   <dependencies>
       <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>5.1.21</version>
       </dependency>
   </dependencies>
   <configuration>
       <configurationFile>${basedir}/src/main/resources/mybatis-generator/generatorConfig.xml
       </configurationFile>
       <overwrite>true</overwrite>
       <verbose>true</verbose>
   </configuration>
</plugin>

generator.properties

#注释掉
#driverLocation=d:/java/JavaTools/mysql-connector-java-5.1.48/mysql-connector-java-5.1.48-bin.jar
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/booksys?serverTimezone=UTC&useSSL=true
username=root
password=fanyi

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="mybatis-generator/generator.properties"/>
    <!--    注释掉-->
    <!--    <classPathEntry location="${driverLocation}"/>-->

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--数据库连接参数 -->
        <jdbcConnection
                driverClass="${driverClassName}"
                connectionURL="${url}"
                userId="${username}"
                password="${password}">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 实体类的包名和存放路径 -->
        <javaModelGenerator targetPackage="com.fy.gen_test.domain" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成映射文件*.xml的位置-->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.fy.gen_test.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- tableName：数据库中的表名或视图名；domainObjectName：生成的实体类的类名-->
        <table tableName="book" domainObjectName="Book"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"/>
      
    </context>
</generatorConfiguration>

完整的pom.xml内容

<?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>
    <groupId>com.fy</groupId>
    <artifactId>gen_test</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gen_test</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.2</version>
        </dependency>

        <!-- mysql -->
        <!--        <dependency>-->
        <!--            <groupId>mysql</groupId>-->
        <!--            <artifactId>mysql-connector-java</artifactId>-->
        <!--            <scope>runtime</scope>-->
        <!--        </dependency>-->
        <!--        <dependency>-->
        <!--            <groupId>mysql</groupId>-->
        <!--            <artifactId>mysql-connector-java</artifactId>-->
        <!--            <version>5.1.21</version>-->
        <!--        </dependency>-->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <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>1.3.5</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/mybatis-generator/generatorConfig.xml
                    </configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

原文链接：https://blog.csdn.net/weixin_42250302/article/details/106986707