mybatis-generator插件使用

idea提供了mybatis-generator插件（代码生成器）

1、新建一个maven项目名为mybatis-generator，文件夹创建mapper及bean和sql映射文件存放地。

2、创建generatorConfig.xml文件，相关配置如下

<?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>

    <!--  mysql数据源配置文件路径  -->
    <properties resource="application-dev.yml"/>

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!--添加这个标签，就证明不会添加注释到代码里面-->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--配置数据库连接-->
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${db.url}"
                        userId="${db.username}"
                        password="${db.password}">
            <property name="nullCatalogMeansCurrent" value="true"/>
        </jdbcConnection>

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

        <!--指定生成javabean的位置-->
        <javaModelGenerator targetPackage="com.hnsm.dao" targetProject="src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!--指定sql的映射文件-->
        <sqlMapGenerator targetPackage="mapper"  targetProject="src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!--指定dao接口生成的位置，mapper接口-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.hnsm.mapper"  targetProject="src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!--table的生成策略-->
        <!-- <table tableName="ALLTYPES" domainObjectName="Customer" >
             <property name="useActualColumnNames" value="true"/>
             <generatedKey column="ID" sqlStatement="DB2" identity="true" />
             <columnOverride column="DATE_FIELD" property="startDate" />
             <ignoreColumn column="FRED" />
             <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
         </table> -->
        <!--可多写  要生成的表名-->

        <table tableName="books" domainObjectName="Books" ></table>



    </context>
</generatorConfiguration>

3、yml文件配置，主要是用于连接数据库

在generatorConfig.xml文件中设定了数据库连接方法的相关变量如下

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

所以yml文件中也要与之对应，代码如下

server:
  port: 9998
datasource:
  mysql:
      db.url: jdbc:mysql://127.0.0.1:3306/sqd?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false
      db.username: root
      db.password: ******
      jdbc.driver: com.mysql.cj.jdbc.Driver

4、pom配置

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

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.30</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

5、右键点击maven插件运行插件

运行结果如下

6、效果如下:

mybatis-generator插件使用

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