mybatsi-MyBatis的逆向工程

一、前言

正向工程：先创建Java实体类，由框架负责根据实体类生成数据库表。 Hibernate是支持正向工
程的。
逆向工程：先创建数据库表，由框架负责根据数据库表，反向生成如下资源：
Java实体类
Mapper接口
Mapper映射文件

二、创建逆向工程的步骤

1.添加依赖和插件

    
    
    <dependencies>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.16version>
        dependency>
        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelperartifactId>
            <version>5.2.0version>
        dependency>
    dependencies>
    <build>
        
        <plugins>
            
            <plugin>
                <groupId>org.mybatis.generatorgroupId>
                <artifactId>mybatis-generator-maven-pluginartifactId>
                <version>1.3.0version>
                
                <dependencies>
                    
                    <dependency>
                        <groupId>org.mybatis.generatorgroupId>
                        <artifactId>mybatis-generator-coreartifactId>
                        <version>1.3.2version>
                    dependency>

                    
                    <dependency>
                        <groupId>mysqlgroupId>
                        <artifactId>mysql-connector-javaartifactId>
                        <version>8.0.16version>
                    dependency>
                dependencies>
            plugin>
        plugins>
    build>
project>

2.创建MyBatis的核心配置文件

3.创建逆向工程的配置文件

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="DB2Tables" targetRuntime="MyBatis3">
        
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC"
                        userId="root"
                        password="123456">
        jdbcConnection>
        
        <javaModelGenerator targetPackage="com.kent.mybatis.pojo" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        javaModelGenerator>
        
        <sqlMapGenerator targetPackage="com.kent.mybatis.mapper"  targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        sqlMapGenerator>
        
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.kent.mybatis.mapper"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        javaClientGenerator>
        
        
        
        <table tableName="t_emp" domainObjectName="Emp"/>
        <table tableName="t_dept" domainObjectName="Dept"/>
    context>
generatorConfiguration>

4.执行MBG插件的generate目标

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