Question

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，启动应用时，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 autowire
> candidate for this dependency. Dependency annotations:
> {@org.springframework.beans.factory.annotation.Autowired(required=true)}
>   at
> org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
>   at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1202)
>   at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
>   at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
>   at
> org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
>   at
> org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
>   at
> org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
>   at
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
>   at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:762)
>   at
> org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
>   at
> org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
>   at
> org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
>   at
> org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
>   at
> org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
>   at
> org.springframework.boot.SpringApplication.run(SpringApplication.java:961)
>   at
> org.springframework.boot.SpringApplication.run(SpringApplication.java:950)
>   at
> jp.bizreach.davide.recommend.application.DavimendApplication.main(DavimendApplication.java:11)
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>   at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>   at java.lang.reflect.Method.invoke(Method.java:483)     at
> com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
> Caused by: 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 autowire
> candidate for this dependency. Dependency annotations:
> {@org.springframework.beans.factory.annotation.Autowired(required=true)}
>   at
> org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:558)
>   at
> org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
>   at
> org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
>   ... 21 more Caused by:
> 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 autowire
> candidate for this dependency. Dependency annotations:
> {@org.springframework.beans.factory.annotation.Autowired(required=true)}
>   at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1308)
>   at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054)
>   at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:949)
>   at
> org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:530)
>   ... 23 more

Answer 1

堆栈跟踪表明您尚未定义要用于RedisTemplate注入的Bean。您可以解析它创建配置文件，例如

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericToStringSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class AppConfig {
 @Bean
 JedisConnectionFactory jedisConnectionFactory() {
  return new JedisConnectionFactory();
 }

 @Bean
 RedisTemplate< String, Long > redisTemplate() {
  final RedisTemplate< String, Long > template =  new RedisTemplate< String, Long >();
  template.setConnectionFactory( jedisConnectionFactory() );
  template.setKeySerializer( new StringRedisSerializer() );
  template.setHashValueSerializer( new GenericToStringSerializer< Long >( Long.class ) );
  template.setValueSerializer( new GenericToStringSerializer< Long >( Long.class ) );
  return template;
 }
}

获得配置文件后，您需要将其传递给SpringApplication.run例如

Object[] sources = {AppConfig.class};
ApplicationContext ctx = SpringApplication.run(sources, args);

Answer 2

如果使用Spring启动，请在spring-boot-starter-redis中添加一个依赖项，它将引入redisTemplate bean。但是，该bean的类型为RedisTemplate<Object, Object>，

因此，为您需要的操作创建另一个bean，如enter link description here

所示

Answer 3

你可以按照pd.melt在顶部说，但你可以轻松地处理这个问题：

1，自动连线sol4me

RedisTemplate

2，设置如下值：

@Autowired
private RedisTemplate redisTemplate;

3，得到这样的价值：

redisTemplate.opsForValue().set("yourkey", 12434L);

不需要创建像(Long) redisTemplate.opsForValue().get("yourkey");这样的bean，如果你这样做，你可以在你的系统中创建很多bean。所以只需使用简单的方法。

Answer 4

给出不同的东西，就像现在是2018年（有很多东西改变了很长时间阻止我）

首先Dependency（Gradle）

compile('org.springframework.boot:spring-boot-starter-data-redis')
compile('org.springframework.boot:spring-boot-starter-data-redis-reactive')

请记住使用最新版本，您可以使用gradle-use-latest-versions-plugin来检查依赖项是否是最新的。

RedisServer

[Linux] 
redis-server

[spring.properties]
spring.redis.host=localhost
spring.redis.port=6379
spring.cache.cache-names=orderIdPool,users
spring.cache.redis.cache-null-values=true
spring.cache.redis.time-to-live=600000ms

Redis config

@Configuration
public class RedisConfig {

/**
 * create a lettuceConnectionFactory for redisTemplate {@link 
 #redisUserTemplate()}
 * @return LettuceConnectionFactory, the old version use Jedis
*/
@Bean
public LettuceConnectionFactory lettuceConnectionFactory() {
    return new LettuceConnectionFactory();
}

/**
 * Description: aiming to create a template for Long and user(To be a user cache)
 * @return redisTemplate<Long,User>
*/
@Bean
@Qualifier("redisUserTemplate")
public RedisTemplate<Long, User> redisUserTemplate() {
    RedisTemplate<Long, User> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(new LettuceConnectionFactory());
    return redisTemplate;
}

使用RedisTemplate

private RedisTemplate redisTemplate
//@Qualifier to choose the bean you actually want. 
@Autowired
public constructor(@Qualifier("xxxRedisTemplate")RedisTemplate redisTemplate){
  this.redisTemplate=redisTemplate;
}

使用redisTemplate

private HashOperations<Long, byte[], byte[]> hashOperations = redisUserTemplate.opsForHash();
private HashMapper<Object, byte[], byte[]> hashMapper = new ObjectHashMapper();
@Nullable
public void saveObject(Long key, User user) {
   Map<byte[], byte[]> mappedHash = hashMapper.toHash(user);
   hashOperations.putAll(key, mappedHash);
}
public Object loadObject(Long key) {
   Map<byte[], byte[]> loadedHash = hashOperations.entries(key);
   return hashMapper.fromHash(loadedHash);
}

如果您遇到圆形弹簧注入错误，请考虑setter injection，@ Lazy，@ PostConstructor或实现ApplicationContextAware，InitalizingBean，有关更多信息，请浏览此链接how to fix this

如何自动连接RedisTemplate <string，long> </string，long>

4 个答案: