Java新建Maven專案學習Spring註解開發顯示：Unsupported class file major version 60

阿新 • • 發佈：2022-05-13

發生緣由

學習Spring中註解開發

環境

jdk版本：jdk-16.0.2
Idea版本：2021.2
電腦系統：win10

問題描述

新疆一個Maven專案，pom.xml檔案中新增Spring依賴

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>
    </dependencies>

建立BookDao介面和BookDaoImpl類

package com.linxuan.dao;

public interface BookDao {
    public void save();
    public void update();
}
package com.linxuan.dao.impl;

import com.linxuan.dao.BookDao;
import org.springframework.stereotype.Repository;

// 相當於Component註解，不過是dao層的Component註解。
// 建立一個Been物件，讓Spring管理，預設名字是當前類名首字母小寫
@Repository
public class BookDaoImpl implements BookDao {

    @Override
    public void save() {
        System.out.println(System.currentTimeMillis());
        System.out.println("book dao save ...");
    }

    @Override
    public void update() {
        System.out.println("book dao update ...");
    }
}

建立Spring的配置類

package com.linxuan.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan("com.linxuan")
public class SpringConfig {
}

編寫執行類以及主方法

package com.linxuan;

import com.linxuan.config.SpringConfig;
import com.linxuan.dao.BookDao;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class App {
    public static void main(String[] args) {
        ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringConfig.class);

        BookDao bookDao = ctx.getBean(BookDao.class);
        bookDao.update();
    }
}

執行主方法。結果發現報錯，報錯資訊如下：

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [D:\Java\IdeaProjects\ssm\spring02\spring01_aop\target\classes\com\linxuan\App.class]; nested exception is org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [D:\Java\IdeaProjects\ssm\spring02\spring01_aop\target\classes\com\linxuan\App.class]; nested exception is java.lang.IllegalArgumentException: Unsupported class file major version 60
    at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.scanCandidateComponents(ClassPathScanningCandidateComponentProvider.java:452)
    at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:315)
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:276)
    at org.springframework.context.annotation.ComponentScanAnnotationParser.parse(ComponentScanAnnotationParser.java:132)
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:296)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:250)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:207)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:175)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:319)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:236)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:280)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:96)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:707)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:533)
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:89)
    at com.linxuan.App.main(App.java:10)
Caused by: org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file [D:\Java\IdeaProjects\ssm\spring02\spring01_aop\target\classes\com\linxuan\App.class]; nested exception is java.lang.IllegalArgumentException: Unsupported class file major version 60
    at org.springframework.core.type.classreading.SimpleMetadataReader.getClassReader(SimpleMetadataReader.java:60)
    at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:49)
    at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:103)
    at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:123)
    at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.scanCandidateComponents(ClassPathScanningCandidateComponentProvider.java:429)
    ... 15 more
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 60
    at org.springframework.asm.ClassReader.<init>(ClassReader.java:196)
    at org.springframework.asm.ClassReader.<init>(ClassReader.java:177)
    at org.springframework.asm.ClassReader.<init>(ClassReader.java:163)
    at org.springframework.asm.ClassReader.<init>(ClassReader.java:284)
    at org.springframework.core.type.classreading.SimpleMetadataReader.getClassReader(SimpleMetadataReader.java:57)
    ... 19 more