我想在春季启动时使用RedisTemplate.我可以成功使用StringRedeisTemplate,但是当我无法使用RedisTemplate时.这是代码.
@Service
public class MyService {
@Autowired
private RedisTemplate<String, Long> template;
public void execute() {
template.opsForValue().set("hoge", 1l);
}
}
但是,当启动应用程序时,会出错.
> Exception in thread "main"
> org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'MyService': Injection of autowired
> dependencies failed; nested exception is
> org.springframework.beans.factory.BeanCreationException: Could not
> autowire field: private
> org.springframework.data.redis.core.RedisTemplate
> org.hoge.service.MyService.template; nested exception is
> org.springframework.beans.factory.NoSuchBeanDefinitionException: No
> qualifying bean of type
> [org.springframework.data.redis.core.RedisTemplate] found for
> dependency: expected at least 1 bean which qualifies as …同时查看CollectionUtils addAll方法的源代码.我注意到它使用|=符号
public static <T> boolean addAll(Collection<? super T> c, T... elements) {
boolean result = false;
for (T element : elements)
result |= c.add(element);
return result;
}
从我的理解|=是一个按位或运算符,只是一个简写result = result|c.add(element),所以例如:
System.out.println(false|true); //true
System.out.println(false|false); //false
System.out.println(true|false); //true
System.out.println(true|true); //true
这意味着如果成功添加任何项目,它将返回true.现在我一直想知道会有一个实例,它会返回false吗？如果不是为什么它有回报？
我刚刚开始研究 Spring 4 stomp over websocket。这两者有什么区别？我应该使用哪种情况而不是另一种情况？
我正在尝试在使用音频相关框架的情况下生成 SDK，当编译代码时出现以下链接错误。解决这些问题的任何帮助。
Undefined symbols for architecture armv7:
"_vDSP_ztoc", referenced from:
FFTRealCalculator::InverseFFT_A(ComplexSplit*, float*, int) in libEywaSDK.a(FFTRealCalculator.o)
"_vDSP_ctoz", referenced from:
FFTRealCalculator::ForwardFFT_A(float const*, unsigned long, ComplexSplit*) in libEywaSDK.a(FFTRealCalculator.o)
"_vDSP_fft_zrip", referenced from:
FFTRealCalculator::ForwardFFT_A(float const*, unsigned long, ComplexSplit*) in libEywaSDK.a(FFTRealCalculator.o)
FFTRealCalculator::InverseFFT_A(ComplexSplit*, float*, int) in libEywaSDK.a(FFTRealCalculator.o)
"_vDSP_create_fftsetup", referenced from:
FFTRealCalculator::Initialize(unsigned char) in libEywaSDK.a(FFTRealCalculator.o)
"_vDSP_destroy_fftsetup", referenced from:
FFTRealCalculator::~FFTRealCalculator() in libEywaSDK.a(FFTRealCalculator.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)