Mybatis笔记(六) ——Mybatis Generator自动生成entity实体类/mapper接口/xml文件

事先准备：先把数据库的表都设计好

1.引入依赖

dependencies和plugin下，需要添加依赖和配置如下所示

    <dependencies> 
        //....其他依赖

        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>5.1.40</version>
         </dependency>
        <!--生成代码插件-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.7</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <!--Mybatis-generator插件,用于自动生成Mapper和entuty-->
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <configuration>
                    <!--配置文件的位置-->
                    <configurationFile>src/main/resources/mybatis-generator-config.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.40</version>
                    </dependency>
                    <!--生成代码插件-->
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.7</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>

2.mybatis-generator-config.xml插件配置文件

主要有三个地方需要自行配置

• 数据库的相关配置 ：jdbcConnection标签下的内容 驱动类，连接，用户名密码
• 各类文件的生成位置配置：javaModelGenerator标签、sqlMapGenerator标签、sqlMapGenerator标签、javaClientGenerator标签下的内容，指定生成路径和包名
• 相关表的配置: table标签下的内容，指定需要生成的方法，enable开头的设置项

<?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>
    <context id="context" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/>
        </commentGenerator>
        <!-- 数据库的相关配置 -->
        <jdbcConnection driverClass="org.mysql.Driver" connectionURL="jdbc:mysql://ip/dbname?useUnicode=true;characterEncoding=utf-8" userId="username" password="password"/>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 实体类生成的位置 -->
        <javaModelGenerator targetPackage="com.piao.entity" targetProject="src/main/java">
            <property name="enableSubPackages" value="false"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- *Mapper.xml 文件的位置 -->
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>
        <!-- Mapper接口文件的位置 -->
        <javaClientGenerator targetPackage="com.piao.mapper" targetProject="src/main/java" type="XMLMAPPER">
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>
        <!-- 相关表的配置 -->
        <table tableName="factor_result" domainObjectName="FactorResult"  enableInsert="true" enableDeleteByPrimaryKey="true" enableUpdateByPrimaryKey="true" enableSelectByPrimaryKey="true" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
        <table tableName="factor_weight" domainObjectName="FactorWeight" enableInsert="true" enableDeleteByPrimaryKey="true" enableUpdateByPrimaryKey="true" enableSelectByPrimaryKey="true" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
        <table tableName="factor_score" domainObjectName="FactorScore" enableInsert="true" enableDeleteByPrimaryKey="true" enableUpdateByPrimaryKey="true" enableSelectByPrimaryKey="true" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
        <table tableName="extra_factor_score" domainObjectName="ExtraFactorScore" enableInsert="true" enableDeleteByPrimaryKey="true" enableUpdateByPrimaryKey="true" enableSelectByPrimaryKey="true" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
    </context>
</generatorConfiguration>

3.设置启动器并执行

新建一个启动器，如下图所示，入口为执行的绿色三角左侧，选择Edit Configurations…

加号、选择maven、设置名称和指令

mybatis-generator:generate -e

执行，执行时控制台信息如下，文件就自动生成了

[INFO] --- mybatis-generator-maven-plugin:1.3.7:generate (default-cli) @ storm_score ---
[INFO] Connecting to the Database
[INFO] Introspecting table factor_result
[INFO] Introspecting table factor_weight
[INFO] Introspecting table factor_score
[INFO] Introspecting table extra_factor_score
[INFO] Generating Record class for table factor_result
[INFO] Generating Mapper Interface for table factor_result
[INFO] Generating SQL Map for table factor_result
[INFO] Generating Record class for table factor_weight
[INFO] Generating Mapper Interface for table factor_weight
[INFO] Generating SQL Map for table factor_weight
[INFO] Generating Record class for table factor_score
[INFO] Generating Mapper Interface for table factor_score
[INFO] Generating SQL Map for table factor_score
[INFO] Generating Record class for table extra_factor_score
[INFO] Generating Mapper Interface for table extra_factor_score
[INFO] Generating SQL Map for table extra_factor_score
[INFO] Saving file FactorResultMapper.xml
[INFO] Saving file FactorWeightMapper.xml
[INFO] Saving file FactorScoreMapper.xml
[INFO] Saving file ExtraFactorScoreMapper.xml
[INFO] Saving file FactorResult.java
[INFO] Saving file FactorResultMapper.java
[INFO] Saving file FactorWeight.java
[INFO] Saving file FactorWeightMapper.java
[INFO] Saving file FactorScore.java
[INFO] Saving file FactorScoreMapper.java
[INFO] Saving file ExtraFactorScore.java
[INFO] Saving file ExtraFactorScoreMapper.java
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.603 s
[INFO] Finished at: 2021-03-23T15:07:23+08:00
[INFO] ------------------------------------------------------------------------