1. Create a Maven project
If you are not sure about creating a maven project, you can refer to the first step of the following link:
Two, pom.xml file configuration
<?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.zaq.crowd</groupId>
<artifactId>atcrowdfunding06-common-reverse</artifactId>
<version>1.0-SNAPSHOT</version>
<!-- 依赖 MyBatis 核心包 -->
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
</dependencies>
<!-- 控制 Maven 在构建过程中相关配置 -->
<build>
<!-- 构建过程中用到的插件 -->
<plugins>
<!-- 具体插件,逆向工程的操作是以构建过程中插件形式出现的 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
<!-- 插件的依赖 -->
<dependencies>
<!-- 逆向工程的核心依赖 -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!-- MySQL 驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
3. Create the configuration file generatorConfig.xml of mybatis under the resources file
<?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>
<!-- mybatis-generator:generate -->
<context id="atguiguTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是;false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<jdbcConnection
driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/project_crowd?useUnicode=yes&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC"
userId="root"
password="root">
</jdbcConnection>
<!-- 默认 false,把 JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true 时把
JDBC DECIMAL
和 NUMERIC 类型解析为 java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- targetProject:生成 Entity 类的路径 -->
<javaModelGenerator targetProject=".\src\main\java"
targetPackage="com.zaq.crowd.entity">
<!-- enableSubPackages:是否让 schema 作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- targetProject:XxxMapper.xml 映射文件生成的路径 -->
<sqlMapGenerator targetProject=".\src\main\java"
targetPackage="com.zaq.crowd.mapper">
<!-- enableSubPackages:是否让 schema 作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- targetPackage:Mapper 接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetProject=".\src\main\java"
targetPackage="com.zaq.crowd.mapper">
<!-- enableSubPackages:是否让 schema 作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 数据库表名字和我们的 entity 类对应的映射指定 -->
<table tableName="t_admin" domainObjectName="Admin"/>
</context>
</generatorConfiguration>
4. Maven command to perform reverse generation operation
mybatis-generator:generate
1. Click Run on the idea status bar --> Edit Configurations
2. Click the plus sign "+" ——> Maven
3. Fill in the corresponding information, click Apply after filling, and click OK
Name: Fill in a name that you think is easy to understand
Working directory: the path of the current project
Command line: generate maven commands for reverse engineering (mybatis-generator:generate)
4. After running maven (click the green triangle), the corresponding files in the mybatis configuration file are automatically generated