老师，按照步骤弄，用户密码都一致，邮箱也激活了，还是403 。     网站授权是咋弄？

老师，分配权限有什么用，我用拥有不同权限的身份登录系统依然可以使用所有功能

这个代码，运行后，搜索框直接右浮到网页的最右边，了

而不是

System.out.println("字符串"+a"字符串");

想在两个字符串之间加入变量a，请问格式是什么

前端环境搭建npm install出错，该怎么解决

老师，如果同时出现两种异常，是不是只会输出第一个遇到异常的地方，有没有办法可以同时将两种异常都输出出来。

问题解决了

补充楼上的图

为什么视频里return 10000什么也没返回？return 10000的作用是什么

请问各位老师pycharm中运行按钮呈灰色，以致不能运行python脚本该怎么处理？我在网上没找到合适的答案，所以来紧急求助。

老是为什么这个j不用闭包

既然继承Runable可以使用Thread自带的setName()方法，那继承Thread它本身就是Thread为什么不直接调用Thread自带的setName()方法还需要自己构造一个SetName1()方法来改名字呢

老师，代码一样的，为什么会没有结果呢

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [F:\校园卡管理系统\demo1\Sping_Mybatis\out\production\Sping_Mybatis\com\bjsxt\mapper\UsersMapper.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 [F:\校园卡管理系统\demo1\Sping_Mybatis\out\production\Sping_Mybatis\com\bjsxt\mapper\UsersMapper.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.mybatis.spring.mapper.ClassPathMapperScanner.doScan(ClassPathMapperScanner.java:181)

at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.scan(ClassPathBeanDefinitionScanner.java:254)

at org.mybatis.spring.mapper.MapperScannerConfigurer.postProcessBeanDefinitionRegistry(MapperScannerConfigurer.java:356)

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:280)

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:126)

at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:707)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:533)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)

at com.bjsxt.test.MapperScannerConfigurerTest.main(MapperScannerConfigurerTest.java:8)

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 [F:\校园卡管理系统\demo1\Sping_Mybatis\out\production\Sping_Mybatis\com\bjsxt\mapper\UsersMapper.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)

... 12 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)

... 16 more

老师 我想问一下这种异常怎么解决呀

def producer():
    num = 1
    if num < 10:
        if queue.qsize() < 10:
            print(f'生产:{num}号，大馒头')
            queue.put(f'大馒头：{num}号')
            num += 1
    else:
        print('馒头框满了,等待来人消费啊！')
    sleep(1)

def consumer():
    if queue.qsize() > 0:
        print(f'获取馒头：{queue.get()}')
        sleep(1)
    else:
        print('没有馒头了！')


if __name__ == '__main__':
    queue = Queue()
    t = Thread(target=producer)
    t.start()
    c = Thread(target=consumer)
    c.start()

老师，我自己写的代码，但是始终都只能生产一个馒头并获取一个馒头。请问问题出在哪里？谢谢！