【SpringBoot3集成Mybatis-plus】启动报错问题解决

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记录日常开发中，springboot 3 集成mubatisPlus，项目编译无报错，启动报错：Bean named ‘ddlApplicationRunner’ is expected to be of type ‘org.springframework.boot.Runner’ but was actually of type ‘org.springframework.beans.factory.support.NullBean’ 有效解决方案。

报错内容：

org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'ddlApplicationRunner' is expected to be of type 'org.springframework.boot.Runner' but was actually of type 'org.springframework.beans.factory.support.NullBean'
	at org.springframework.beans.factory.support.AbstractBeanFactory.adaptBeanInstance(AbstractBeanFactory.java:410) ~[spring-beans-6.1.2.jar:6.1.2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:391) ~[spring-beans-6.1.2.jar:6.1.2]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204) ~[spring-beans-6.1.2.jar:6.1.2]
	at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:778) ~[spring-boot-3.2.1.jar:3.2.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:341) ~[spring-boot-3.2.1.jar:3.2.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1358) ~[spring-boot-3.2.1.jar:3.2.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1347) ~[spring-boot-3.2.1.jar:3.2.1]
	at com.hqwy.service.SpringbootApplication.main(SpringbootApplication.java:13) ~[classes/:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50) ~[spring-boot-devtools-3.2.1.jar:3.2.1]

亲测有效解决方案：

• 修改Mybatis-Plus的依赖坐标

<dependency>
	<groupId>com.baomidou</groupId>
	<artifactId>mybatis-plus-spring-boot3-starter</artifactId>
	<version>3.5.5</version>
	<exclusions>
		<exclusion>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
		</exclusion>
	</exclusions>
</dependency>
<!-- mybatis-plus 所需依赖  -->
<dependency>
	<groupId>org.mybatis</groupId>
	<artifactId>mybatis-spring</artifactId>
</dependency>

亲测第二种有效解决方案：

本着缺什么就补什么的原则，将缺少的Bean对象注入到容器中。

import com.baomidou.mybatisplus.autoconfigure.DdlApplicationRunner;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Edwin
 * @version 1.0.0
 */
@Component
public class GlobalConfig {

    @Bean
    public DdlApplicationRunner ddlApplicationRunner(@Autowired(required = false) List ddlLrist) {
        return new DdlApplicationRunner(ddlLrist);
    }

}

end 到此！问题完美解决，这个问题困扰了我好几天… 苦苦寻觅到的解决方式。

本文标签： 报错MyBatis