SpringMVC使用mybatis-plus配置好之后无法生成代码 - java报错

@青苗 你好，想跟你请教个问题：SpringMVC使用mybatis-plus配置好之后无法生成代码，代码及配置如下。

public class CustomGenerator {
	 public static void main(String[] args) {
	        ConfigGenerator cg = new ConfigGenerator();
	        // 配置 MySQL 连接
	        cg.setDbDriverName("com.mysql.jdbc.Driver");
	        cg.setDbUser("root");
	        cg.setDbPassword("123456");
	        cg.setDbUrl("jdbc:mysql://127.0.0.1:3306/onard?characterEncoding=utf8");
	        // 配置包名
	        cg.setEntityPackage("com.hvg.manager.test.entity");
	        cg.setMapperPackage("com.hvg.manager.test.db.testMapper");
	        cg.setXmlPackage("com.hvg.manager.test.db.testMapper.xml");
	        cg.setServicePackage("com.hvg.manager.test.service");
	        cg.setServiceImplPackage("com.hvg.manager.test.service.impl");
	        cg.setDbPrefix(true);
	        // 配置表主键策略
	        cg.setIdType(IdType.AUTO);
	        
	        // 配置保存路径
	        cg.setSaveDir("/path/to/src");
	        // 其他参数请根据上面的参数说明自行配置，当所有配置完善后，运行AutoGenerator.run()方法生成Code
	        // 生成代码
	        AutoGenerator.run(cg);
	    }
}

<bean id="sqlSessionFactory"
		class="com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<property name="typeAliasesPackage" value="com.hvg.manager.test.entity" />
<property name="mapperLocations" value="classpath:com.hvg.manager.test.db;/*Mapper.xml" />
<property name="plugins">
			<array>
				<!-- 分页插件配置 -->
				<bean id="paginationInterceptor"
					class="com.baomidou.mybatisplus.plugins.PaginationInterceptor">
					<property name="dialectType" value="mysql" />
				</bean>
			</array>
		</property>
<property name="dbColumnUnderline" value="true" />
	</bean>

<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
 <property name="basePackage" value="com.hvg.*.*.db;" />
 <property name="sqlSessionFactory" ref="sqlSessionFactory" />
 </bean>

<!-- 数据库配置 -->
	<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://localhost:3306/onard" />
		<property name="username" value="roottt" />
		<property name="password" value="123456" />
	</bean>

<!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus -->
		<dependency>
		    <groupId>com.baomidou</groupId>
		    <artifactId>mybatis-plus</artifactId>
		    <version>1.4.7</version>
		</dependency>