SpringBoot（三）整合Redis

亦凉 2022-07-15 13:12 240阅读 0赞

## 遇到的问题 ##

SpringBoot整合Redis，参考一下博客：

[http://www.tuicool.com/articles/mAriMbI][http_www.tuicool.com_articles_mAriMbI]

存在的问题：  
注入RedisTemplate的时候如果按照该博客的做法，添加泛型

@Autowired
    private RedisTemplate<String, User> redisTemplate;

则会产生启动报错：

2016-10-23 16:32:53.133 ERROR 13404 --- [           main] o.s.boot.SpringApplication : Application startup failed
    
    org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'helloController': Unsatisfied dependency expressed through field 'redisTemplate': No qualifying bean of type [org.springframework.data.redis.core.RedisTemplate] found for dependency [org.springframework.data.redis.core.RedisTemplate<java.lang.String, com.model.User>]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {
       @org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.data.redis.core.RedisTemplate] found for dependency [org.springframework.data.redis.core.RedisTemplate<java.lang.String, com.model.User>]: 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:569) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
        at com.didispace.Chapter1Application.main(Chapter1Application.java:18) [classes/:na]
    Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.data.redis.core.RedisTemplate] found for dependency [org.springframework.data.redis.core.RedisTemplate<java.lang.String, com.model.User>]: 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.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1406) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1057) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
        ... 19 common frames omitted

改成如下则没问题：

@Autowired
    private RedisTemplate redisTemplate;

## 整合详细过程 ##

自己实际编写的效果如下：

*  添加Maven依赖

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

*  添加配置文件  
    在 application.properties 中加入Redis服务端的相关配置

# REDIS (RedisProperties)
    # Redis数据库索引（默认为0）
    spring.redis.database=0  
    # Redis服务器地址
    spring.redis.host=localhost  
    # Redis服务器连接端口
    spring.redis.port=6379  
    # Redis服务器连接密码（默认为空）
    spring.redis.password=  
    # 连接池最大连接数（使用负值表示没有限制）
    spring.redis.pool.max-active=8  
    # 连接池最大阻塞等待时间（使用负值表示没有限制）
    spring.redis.pool.max-wait=-1  
    # 连接池中的最大空闲连接
    spring.redis.pool.max-idle=8  
    # 连接池中的最小空闲连接
    spring.redis.pool.min-idle=0  
    # 连接超时时间（毫秒）
    spring.redis.timeout=0

*  在Controller测试访问

/** * * @version 1.0 * @Description * @Date 2016/10/15 18:30 * @Author NICK */
    @RestController
    public class HelloController { 
    
        @Autowired
        private StringRedisTemplate stringRedisTemplate;
    
        @Autowired
        private RedisTemplate redisTemplate;
    
        @RequestMapping("/hello")
        public String index() {
            // 保存字符串
            stringRedisTemplate.opsForValue().set("aaa", "111");
            String string = stringRedisTemplate.opsForValue().get("aaa");
            System.out.println(string);
    
            // 保存对象
            User user = new User("超人", 20);
            redisTemplate.opsForValue().set(user.getUsername(), user);
    
            user = new User("蝙蝠侠", 30);
            redisTemplate.opsForValue().set(user.getUsername(), user);
    
            user = new User("蜘蛛侠", 40);
            redisTemplate.opsForValue().set(user.getUsername(), user);
            User user1 = (User)redisTemplate.opsForValue().get("超人");
            System.out.println(user1.getAge().longValue());
            System.out.println(((User)redisTemplate.opsForValue().get("蝙蝠侠")).getAge().longValue());
            System.out.println(((User)redisTemplate.opsForValue().get("蜘蛛侠")).getAge().longValue());
    
            return "Hello World";
        }
    }

运行启动入口，启动Redis，启动SpringBoot，在浏览器访问：[http://localhost:8080/hello][http_localhost_8080_hello]  
浏览器显示Hello World，后台控制台打印  
111  
20  
30  
40

表示整合测试成功

[http_www.tuicool.com_articles_mAriMbI]: http://www.tuicool.com/articles/mAriMbI
[http_localhost_8080_hello]: http://localhost:8080/hello