idea mybatis-generator

pom文件添加generator所需启动插件及其核心依赖：


<plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.7</version>
          <!--
              default,automatically to search file called
              generatorConfig.xml at '/src/main/resources/generatorConfig.xml'
              if we put it to other places or named the file with other name
              add the following configuration
           -->
          <!--=============**指明指定文件，否则会默认到'/src/main/resources/‘目录找名为generatorConfig.xml的文件**==================-->
        <configuration>
            <configurationFile>src/main/resources/BG.xml</configurationFile>
        </configuration>
          <!--==============================-->
          
      </plugin>

     <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.3.5</version>
    </dependency>

写好generatorConfig.xml配置文件

<?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>



    <properties resource="db.properties"/>

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator >
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="${jdbc.url}"
                        userId="${jdbc.username}"
                        password="${jdbc.password}">
        </jdbcConnection>

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

        <javaModelGenerator targetPackage="pojo" targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <sqlMapGenerator targetPackage="mapper"  targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <javaClientGenerator type="XMLMAPPER" targetPackage="dao"  targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <table tableName="book_info" domainObjectName="Book_info" />
        <table tableName="book_type" domainObjectName="Book_type"/>


    </context>
</generatorConfiguration>

运行：

你可能遇到错误：

Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate failed:
 Exception getting JDBC 
 Driver: com.mysql.jdbc.Driver （mybatis逆向工程）

解决：把pom文件的mysql驱动依赖复制一份加到generator启动插件中去，注意是复制

<plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.7</version>
          <!--
              default,automatically to search file called
              generatorConfig.xml at '/src/main/resources/generatorConfig.xml'
              if we put it to other places or named the file with other name
              add the following configuration
           -->
          <!--===============================-->
        <configuration>
            <configurationFile>src/main/resources/BG.xml</configurationFile>
        </configuration>
          <!--============**在这里添加**==================-->
          <dependencies>
              <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
              <dependency>
                  <groupId>mysql</groupId>
                  <artifactId>mysql-connector-java</artifactId>
                  <version>8.0.11</version>
              </dependency>
          </dependencies>
      </plugin>