<?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="atguiguTables" targetRuntime
 
="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自動生成的註釋 true:是;false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--資料庫連線的資訊：驅動類、連線地址、使用者名稱、密碼 -->
        <jdbcConnection 
            driverClass
 
="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/springboot" 
            userId="root"
            password="1234">
        </jdbcConnection>

        <!-- 預設false，把JDBC DECIMAL 和 NUMERIC 型別解析為 Integer，為 true時把JDBC DECIMAL 
            和 NUMERIC 型別解析為java.math.BigDecimal 
 
-->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- targetProject:生成Entity類的路徑 -->
        <javaModelGenerator targetProject=".\src\main\java"
            targetPackage="cn.leon.entity">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false" />
            <!-- 從資料庫返回的值被清理前後的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- targetProject:XxxMapper.xml對映檔案生成的路徑 -->
        <sqlMapGenerator targetProject=".\src\main\java"
            targetPackage="cn.leon.mapper">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>

        <!-- targetPackage：Mapper介面生成的位置 -->
        <javaClientGenerator type="XMLMAPPER"
            targetProject=".\src\main\java"
            targetPackage="cn.leon.mapper">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>

        <!-- 資料庫表名字和我們的entity類對應的對映指定 -->
        <table tableName="payment" domainObjectName="Payment" />

    </context>
</generatorConfiguration>

pom

<!-- 控制Maven在構建過程中相關配置 -->
    <build>

        <!-- 構建過程中用到的外掛 -->
        <plugins>

            <!-- 具體外掛，逆向工程的操作是以構建過程中外掛形式出現的 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.0</version>

                <!-- 外掛的依賴 -->
                <dependencies>
                    <!-- 資料庫連線池 -->
                    <dependency>
                        <groupId>com.mchange</groupId>
                        <artifactId>c3p0</artifactId>
                        <version>0.9.2</version>
                    </dependency>
                    <!-- MySQL驅動 -->
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.8</version>
                    </dependency>
                    <!-- 逆向工程的核心依賴 -->
                    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.7</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

命令：mybatis-generator:generate