• 先建一個spring-boot專案，這裡不多說了！
• 修改pom檔案：

<?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.example</groupId>
	<artifactId>springboot-mybatis-generator</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>springboot-mybatis-generator</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.2.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.30</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.2</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.mybatis.generator</groupId>
			<artifactId>mybatis-generator-core</artifactId>
			<version>1.3.2</version>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<groupId>org.mybatis.generator</groupId>
				<artifactId>mybatis-generator-maven-plugin</artifactId>
				<version>1.3.2</version>
				<!-- 自動生成 -->
				<executions>
					<execution>
						<id>Generate MyBatis Files</id>
						<goals>
							<goal>generate</goal>
						</goals>
						<configuration>
							<!-- 指定檔案位置好像不起作用，始終預設讀取src/main/resources/generatorConfig.xml檔案 -->
							<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
							<!--允許移動生成的檔案-->
							<verbose>true</verbose>
							<!--允許覆蓋生成的檔案-->
							<overwrite>true</overwrite>
						</configuration>
					</execution>
				</executions>
				<dependencies>
					<dependency>
						<groupId>org.mybatis.generator</groupId>
						<artifactId>mybatis-generator-core</artifactId>
						<version>1.3.5</version>
					</dependency>
					<dependency>
						<groupId>mysql</groupId>
						<artifactId>mysql-connector-java</artifactId>
						<version>5.1.30</version>
					</dependency>
					<dependency>
						<groupId>org.mybatis</groupId>
						<artifactId>mybatis</artifactId>
						<version>3.4.2</version>
					</dependency>
				</dependencies>
			</plugin>
		</plugins>



	</build>


</project>

 

• 在src/main/resources目錄下建立generatorConfig.xml檔案

   generatorConfig.xml檔案配置了程式碼自動生成的一些規則和基本屬性，並配置通用mapper的外掛，使所有的mapper都繼承通用mapper，程式碼如下：
  

<?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="MBG" targetRuntime="MyBatis3" defaultModelType="conditional">
        <!-- 注意以下標籤的順序:property*,plugin*,commentGenerator?,jdbcConnection,
                javaTypeResolver?,javaModelGenerator,sqlMapGenerator?,
                javaClientGenerator?,table+ -->

        <!-- generate entity時，生成serialVersionUID -->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
        <!-- 這個外掛只會增加字串欄位對映到一個JDBC字元的方法 -->
        <plugin type="org.mybatis.generator.plugins.CaseInsensitiveLikePlugin"/>
        <!-- genenat entity時,生成toString -->
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>

        <commentGenerator>
            <!-- 是否去除自動生成的註釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
            <!-- 不希望生成的註釋中包含時間戳 -->
            <property name="suppressDate" value="true" />
            <!-- 是否  自動為每一個生成的類建立一個構造方法-->
            <property name="constructorBased" value="false"/>
        </commentGenerator>
        <!-- 資料庫連線 -->
        <jdbcConnection
                driverClass="com.mysql.jdbc.Driver"
                connectionURL="jdbc:mysql://localhost:3306/test"
                userId="root"
                password="root">
        </jdbcConnection>
        <!-- 指定生成的型別為java型別，避免資料庫中number等型別欄位 -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 生成model模型，對應的包，存放位置可以指定具體的路徑,如/ProjectName/src，也可以使用MAVEN來自動生成 -->
        <javaModelGenerator targetPackage="com.lin.entity" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <!-- 設定是否在getter方法中，對String型別欄位呼叫trim()方法 -->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--對應的xml mapper檔案  -->
        <sqlMapGenerator targetPackage="com.lin.mapper" targetProject="src/main/java" >
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- 對應的dao介面 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.lin.dao" targetProject="src/main/java" >
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- 表名對應生成的實體 -->
        <table tableName="test" domainObjectName="User" schema="" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" selectByExampleQueryId="false" />
    </context>
</generatorConfiguration>
 

• 編譯執行：