Spring boot 的 redis 用不了,搜遍百度也没找到正解,跪求大佬指教!!

DRomine 2018-07-31 03:37:52
我简述一下过程吧,首先是从官方下载基本代码

pom是自动生成的,里面没有引用 redis.clients.jedis,因为之前试过引用了也没有解决我的问题
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>demo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>


</project>

这个版本的spring-boot-starter-data-redis 中,自动配置类仍然包含`RedisTemplate<Object, Object>`和`StringRedisTemplate`的bean,看起来比老版本简洁了很多,通常应该直接用`@Autowired`就能引用了
/*
* Copyright 2012-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.springframework.boot.autoconfigure.data.redis;

import java.net.UnknownHostException;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;

/**
* {@link EnableAutoConfiguration Auto-configuration} for Spring Data's Redis support.
*
* @author Dave Syer
* @author Andy Wilkinson
* @author Christian Dupuis
* @author Christoph Strobl
* @author Phillip Webb
* @author Edd煤 Mel茅ndez
* @author Stephane Nicoll
* @author Marco Aust
* @author Mark Paluch
*/
@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {

@Bean
@ConditionalOnMissingBean(name = "redisTemplate")
public RedisTemplate<Object, Object> redisTemplate(
RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
return template;
}

@Bean
@ConditionalOnMissingBean
public StringRedisTemplate stringRedisTemplate(
RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
StringRedisTemplate template = new StringRedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
return template;
}

}

于是,我自己写了测试代码
package com.example.demo;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

@Autowired
StringRedisTemplate stringRedisTemplate;

@Test
public void contextLoads() {
stringRedisTemplate.opsForValue().append("testKey", "testValue");
}

}

当然还少不了application.properties的配制,没有什么复杂的东西,涉及到ip地址这里就不展示了,下面运行:
2018-07-31 15:33:43.780 ERROR 8212 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@5e0826e7] to prepare test instance [com.example.demo.DemoApplicationTests@2b662a77]

java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) ~[spring-test-5.0.8.RELEASE.jar:5.0.8.RELEASE]
.................
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.data.redis.connection.RedisConnectionFactory' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1506) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:818) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:724) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
... 44 common frames omitted

事请就是这样了,我想尽各种办法也没有找到使用那个`RedisConnectionFactory`的正确姿势,只好到此寻求高人指点了T.T
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DRomine 2018-08-01
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引用 6 楼 gl74gs48 的回复:
那你就慢慢看下,配置哪里有问题了,我跑了你的测试代码两次,在我的机器上没有任何问题,用客户端命令行查看
好吧,我再试试,谢谢您
阿甘1976 2018-08-01
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那你就慢慢看下,配置哪里有问题了,我跑了你的测试代码两次,在我的机器上没有任何问题,用客户端命令行查看

DRomine 2018-08-01
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引用 4 楼 gl74gs48 的回复:
RedisAutoConfiguration类加上
@Autowired
RedisConnectionFactory redisConnectionFactory;

大佬,您看清楚那个是 spring boot 内部的自动配置代码呀,叫我怎么改?
阿甘1976 2018-08-01
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RedisAutoConfiguration类加上
@Autowired
RedisConnectionFactory redisConnectionFactory;
DRomine 2018-07-31
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引用 1 楼 shen19920619 的回复:

@Configuration
//@ConditionalOnClass(RedisOperations.class)
//@EnableConfigurationProperties(RedisProperties.class)
//@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {
}
@RunWith(SpringRunner.class)
@SpringBootTest(classess=xxxx.class)// xxx 是src/main 下面的application.class
public class DemoApplicationTests {

}


那个 AutoConfoguration 上面注释掉是几个意思?我加这样一个空荡荡的类就能执行?
DRomine 2018-07-31
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我知道缺注解参数,不过整个项目里只有一个application.class,这个缺了也是可以执行的。就算带上了,也不能解决 NoSuchBeanDefinitionException 的问题。
ninuxGithub 2018-07-31
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@Configuration
//@ConditionalOnClass(RedisOperations.class)
//@EnableConfigurationProperties(RedisProperties.class)
//@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {
}
@RunWith(SpringRunner.class)
@SpringBootTest(classess=xxxx.class)// xxx 是src/main 下面的application.class
public class DemoApplicationTests {

}


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