Mybatis（七）：Mybatis Generator

Mybatis Generator 自动生成代码工具
官网：http://www.mybatis.org/generator/index.html

一、依赖

<project>
   <modelVersion>4.0.0</modelVersion>
   <groupId>cn.saytime</groupId>
   <artifactId>mybatis_generator</artifactId>
   <version>1.0</version>
   <packaging>pom</packaging>
   <name>mybatis_generator</name>

   <dependencies>
      <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
      <dependency>
         <groupId>org.mybatis.generator</groupId>
         <artifactId>mybatis-generator-core</artifactId>
         <version>1.3.6</version>
      </dependency>
   </dependencies>

</project>

二、配置文件

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>    
    <classPathEntry  location="D:\dev\tools\maven\repo\mysql\mysql-connector-java\5.1.34\mysql-connector-java-5.1.34.jar"/>
    <context id="DB2Tables"  targetRuntime="MyBatis3">    
        <!--<plugin type="com.xx.plugin.MysqlPaginationPlugin"></plugin>  -->

        <!-- 生成备注相关配置 -->
        <commentGenerator>    
            <property name="suppressDate" value="true"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!-- 数据库连接配置 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/test?characterEncoding=utf-8"
                        userId="root"
                        password="root">
        </jdbcConnection>

        <!-- java 类型映射配置 -->
        <javaTypeResolver>    
            <property name="forceBigDecimals" value="false"/>    
        </javaTypeResolver>

        <!-- model -->
        <javaModelGenerator targetPackage="cn.saytime.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>    
            <property name="trimStrings" value="true"/>    
        </javaModelGenerator>

        <!-- mapper xml -->
        <sqlMapGenerator targetPackage="cn.saytime.mapper.mapping" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>    
        </sqlMapGenerator>

        <!-- mapper java -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="cn.saytime.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>    
        </javaClientGenerator>

        <!-- 数据库表配置 -->
        <table tableName="tb_user" domainObjectName="User">
            <!-- 是否使用驼峰式命名 -->
            <property name="useActualColumnNames" value="true"/>

            <!-- 特殊处理某些字段命名 -->
            <columnOverride column="username" property="name" javaType="java.lang.String"/>
        </table>

    </context>
</generatorConfiguration>  

三、生成代码类

Generator.java

public class Generator {

    public static void main(String[] args) throws IOException, XMLParserException, SQLException, InterruptedException, InvalidConfigurationException {

        System.out.println("generator start ...");

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File(Generator.class.getClassLoader().getResource("generatorConfig.xml").getFile());
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);

        System.out.println("generator end...");
    }

}

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