Java Learning MyBatis (4)

I haven't learned Java for a long time, mainly because I was lazy, and then I started playing games. Nan brother taught you to learn Java , I learned from him. Below are my lecture notes.

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I learned reverse engineering this time. My understanding is: One-click generation tool ... Although it is not a mouse click and it came out, but I also wrote some code, and it came out and it was very easy to use.

• First of all:
• For this I have recreated a project. (The red circle is the remaining entity and repository written by yourself is automatically generated)

• pom.xml file

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.southwind</groupId>
    <artifactId>aimgb</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>
<!--        导入逆向工程需要的包-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>
    </dependencies>

</project>

• 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>
    <!--创建MBG配制文件-->
    <!--    1.jdbcConnection 配制数据库连接信息-->
    <!--    2.javaModelGenerator 配制 JavaBean 的生成策略-->
    <!--    3.sqlMapGenerator 配制SQL映射文件生成策略-->
    <!--    4.javaClientGenerator 配制Mapper 接口的生成策略-->
    <!--    5.table 配制目标数据表(tableName：表名，domainObjectName:javaBean 类名)-->
    <context id="testTables" targetRuntime="MyBatis3">
<!--        第一个属性是驱动 第二个是连接地址 第三个是用户名 第四个是密码-->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://.......?useUnicode=true&amp;characterEncoding=UTF-8"
                        userId=""
                        password=""
        ></jdbcConnection>
<!--        第一个属性是 将来存放的包的名字，把实体类放进去 第二个属性是 包放在哪-->
        <javaModelGenerator targetPackage="com.southwind.entity" targetProject="./src/main/java"></javaModelGenerator>
<!--        sql语句的映射 属性同理-->
        <sqlMapGenerator targetPackage="com.southwind.repository" targetProject="./src/main/java"></sqlMapGenerator>
<!--        mapper接口-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.southwind.repository" targetProject="./src/main/java"></javaClientGenerator>
<!--        table-->
        <table tableName="goods" domainObjectName="Goods"></table>
    </context>
</generatorConfiguration>

• Main startup class

package com.southwind.test;

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

import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

//创建Generator执行类
public class Main {
    public static void main(String[] args) {
        List<String> warings = new ArrayList<String>();
        boolean overwrite = true ;
        String genCig = "/generatorConfig.xml";
        File configFile = new File(Main.class.getResource(genCig).getFile());
        ConfigurationParser configurationParser = new ConfigurationParser(warings);
        Configuration configuration = null ;
        try {
            configuration = configurationParser.parseConfiguration(configFile);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (XMLParserException e) {
            e.printStackTrace();
        }
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = null;
        try {
            myBatisGenerator = new MyBatisGenerator(configuration,callback,warings);
        } catch (InvalidConfigurationException e) {
            e.printStackTrace();
        }
        try {
            myBatisGenerator.generate(null);
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

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Then the operation is completed like my file directory. Is there any code that feels less thieves? It feels good to copy and paste it, it's pretty easy to use.