自己遇到一個坑，防止以後再進坑。（其實也就 2個字母順序搞錯了，太粗心...過去寫一百遍。。。）

pom.xml

<?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.lemon</groupId>
    <artifactId>springbootdemo1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springbootdemo1</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.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>

        <!-- 熱載入 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- SpringBoot - MyBatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>


        <!-- SpringBoot - MyBatis 逆向工程 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

        <!-- Mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </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>
                <configuration>
                    <!-- 自動生成的配置,${basedir}表示專案根目錄 ,configurationFile預設在resource目錄下-->
                    <!--<configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>-->
                  <!-- 允許移動生成的檔案 -->
                    <verbose>true</verbose>
                    <!-- 是否覆蓋 -->
                    <overwrite>true</overwrite>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.46</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>

            <!-- 如果不新增此節點mybatis的mapper.xml檔案都會被漏掉。 -->
        <resources>
            <resource>
                <filtering>false</filtering>
                <directory>src/main/resources</directory>
            </resource>
            <resource>
                <filtering>false</filtering>
                <directory>src/main/java</directory>
                <includes>
                    <include>**</include>
                </includes>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
        </resources>
        <testResources>
            <testResource>
                <filtering>false</filtering>
                <directory>src/test/java</directory>
                <includes>
                    <include>**</include>
                </includes>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </testResource>
        </testResources>
    </build>
</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>
	<!-- 引入 application.properties -->
	<properties resource="application.properties" />

	<context id="Mysql" targetRuntime="MyBatis3Simple"
		defaultModelType="flat">
		<property name="beginningDelimiter" value="`" />
		<property name="endingDelimiter" value="`" />

		<!-- 生成 JavaBean 物件重寫 toString方法 -->
		<plugin type="org.mybatis.generator.plugins.ToStringPlugin" />

		<!-- 生成 JavaBean 物件繼承 Serializable 類 -->
		<plugin type="org.mybatis.generator.plugins.SerializablePlugin" />

		<!-- 生成 JavaBean 物件重寫 equals 和 hashCode 方法 -->
		<!-- <plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin" 
			/> -->

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

		<!-- jdbc 連線配置 -->
		<jdbcConnection driverClass="${spring.datasource.driver-class-name}"
			connectionURL="${spring.datasource.url}" userId="${spring.datasource.username}"
			password="${spring.datasource.password}">
		</jdbcConnection>

		<javaModelGenerator targetPackage="${generator.javaModel-targetPackage}"
			targetProject="${generator.targetProject}" />

		<sqlMapGenerator targetPackage="${generator.sqlMap-targetPackage}"
			targetProject="${generator.targetProject}" />

		<javaClientGenerator targetPackage="${generator.javaClient-targetPackage}"
			targetProject="${generator.targetProject}" type="XMLMAPPER" />

		<table tableName="items"></table>
		<table tableName="orders"></table>
		<table tableName="orderdetail"></table>
		<table tableName="user"></table>
		<!-- 有些表的欄位需要指定java型別 <table schema="" tableName=""> <columnOverride column="" 
			javaType="" /> </table> -->
	</context>
</generatorConfiguration>
 

執行

1.右鍵專案 --> Maven --> Maven build --> Goals: mybatis-generator:generate -e，點選 run（-e 表示詳細資訊）

idea下直接點選圖示 即可

2.java程式碼執行

public class GeneratorSqlmap {  
  
    public void generator() throws Exception{  
  
        List<String> warnings = new ArrayList<String>();  
        boolean overwrite = true;  
        //指定 逆向工程配置檔案  
        File configFile = new File("src/main/resources/generatorConfig.xml");   
        
        System.out.println(configFile.getAbsolutePath());
        ConfigurationParser cp = new ConfigurationParser(warnings);  
        Configuration config = cp.parseConfiguration(configFile);  
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);  
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,  
                callback, warnings);  
        myBatisGenerator.generate(null);  
  
    }   
    public static void main(String[] args) throws Exception {  
        try {  
            GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();  
            generatorSqlmap.generator();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
          
    }  
  
}  
 

加油少年！