MyBatis逆向工程的使用（非插件方式）

一、概述

　　MyBatis是目前流行的优秀持久层框架，其逆向工程更是大大缩减了开发时间。所谓逆向工程，指的是mybatis根据数据库设计好的表，自动生成对应model、mapper及mapper.xml，本文是以非插件的方式进行逆向工程。

二、手工代码

　　本文采用IDEA结合Maven实现逆向工程，工程结构如下：

　　

（1）入口类

package com.practice.common.generate;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.util.ArrayList;
import java.util.List;

/**
 * @ProjectName: profile-demo
 * @Package: com.pds.common.generate
 * @ClassName: Generator
 * @Author: dong
 * @Description: ${description}
 * @Date: 2019/9/10 15:45
 * @Version: 1.0
 */
public class Generator {
    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(Generator.class.getResourceAsStream("/generator/generatorConfig.xml"));
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);
    }
}

（2）逆向工程配置文件

　　

<?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>
    <context id="MySQL2" targetRuntime="MyBatis3Simple"
             defaultModelType="flat">
        <property name="javaFileEncoding" value="UTF-8" />

        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers"
                      value="com.practice.common.base.BaseMapper" />
            <property name="caseSensitive" value="true" />
            <!--<property name="beginningDelimiter" value="`"/> -->
            <!--<property name="endingDelimiter" value="`"/> -->
        </plugin>
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://192.168.229.132:3306/test_db"
                        userId="root"
                        password="root">
        </jdbcConnection>
        <javaModelGenerator targetPackage="com.practice.common.model"
                            targetProject="student-demo-common-base/src/main/java" />
        <sqlMapGenerator targetPackage="commonmappers"
                         targetProject="student-demo-common-base/src/main/resources" />
        <javaClientGenerator targetPackage="com.practice.common.mapper"
                             targetProject="student-demo-common-base/src/main/java" type="XMLMAPPER" />


        <table tableName="student">
            <generatedKey column="name" sqlStatement="JDBC" />
        </table>
    </context>
</generatorConfiguration>

（3）运行逆向工程入口类即可

 三、总结

　　本文是以非插件的方式进行逆向工程，在pom文件也有对应插件逆向工程配置，代码已经上传至：https://github.com/Simple-Coder/student-demo/tree/master/student-demo-common-base