SpringBoot缓存技术整合SpringData Redis
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首先说明一下，这里使用的是Springboot2.2.6.RELEASE版本，由于Springboot迭代很快，所以要注意版本问题。
1、SpringData Redis是属于SpringData下的一个模块。作用就是简化对于redis的操作。SpringData JPA为了简化对数据库的操作。修改pom文件添加SpringData Redis的坐标。
1 <?xml version="1.0" encoding="UTF-8"?> 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> 4 <modelVersion>4.0.0</modelVersion> 5 <parent> 6 <groupId>org.springframework.boot</groupId> 7 <artifactId>spring-boot-starter-parent</artifactId> 8 <version>2.2.6.RELEASE</version> 9 <relativePath/> <!-- lookup parent from repository --> 10 </parent> 11 <groupId>com.bie.springboot</groupId> 12 <artifactId>springdata-redis</artifactId> 13 <version>0.0.1-SNAPSHOT</version> 14 <name>springdata-redis</name> 15 <description>Demo project for Spring Boot</description> 16 17 <properties> 18 <java.version>1.8</java.version> 19 </properties> 20 21 <dependencies> 22 <!-- thymeleaf的启动器 --> 23 <dependency> 24 <groupId>org.springframework.boot</groupId> 25 <artifactId>spring-boot-starter-thymeleaf</artifactId> 26 </dependency> 27 <!-- springBoot的启动器 --> 28 <dependency> 29 <groupId>org.springframework.boot</groupId> 30 <artifactId>spring-boot-starter-web</artifactId> 31 </dependency> 32 33 <!-- springBoot测试的启动器 --> 34 <dependency> 35 <groupId>org.springframework.boot</groupId> 36 <artifactId>spring-boot-starter-test</artifactId> 37 <scope>test</scope> 38 <!--<exclusions> 39 <exclusion> 40 <groupId>org.junit.vintage</groupId> 41 <artifactId>junit-vintage-engine</artifactId> 42 </exclusion> 43 </exclusions>--> 44 </dependency> 45 <!-- SpringData Redis的启动器 --> 46 <dependency> 47 <groupId>org.springframework.boot</groupId> 48 <artifactId>spring-boot-starter-data-redis</artifactId> 49 </dependency> 50 <!-- jedis是操作redis的工具依赖包 --> 51 <dependency> 52 <groupId>redis.clients</groupId> 53 <artifactId>jedis</artifactId> 54 <version>2.9.0</version> 55 </dependency> 56 </dependencies> 57 58 <build> 59 <plugins> 60 <plugin> 61 <groupId>org.springframework.boot</groupId> 62 <artifactId>spring-boot-maven-plugin</artifactId> 63 </plugin> 64 </plugins> 65 </build> 66 67 </project>
编写SpringData Redis的配置类，替代了之前的配置文件。
1 package com.bie.springboot.config; 2 3 import org.springframework.context.annotation.Bean; 4 import org.springframework.context.annotation.Configuration; 5 import org.springframework.data.redis.connection.RedisStandaloneConfiguration; 6 import org.springframework.data.redis.connection.jedis.JedisClientConfiguration; 7 import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; 8 import org.springframework.data.redis.core.RedisTemplate; 9 import org.springframework.data.redis.serializer.StringRedisSerializer; 10 import redis.clients.jedis.JedisPoolConfig; 11 12 /** 13 * 完成对Redis的整合的一些配置。 14 * 1、JedisConnectionFacotory从SpringData Redis 2.0开始已经不推荐直接显示设置连接的信息了， 15 * 一方面为了使配置信息与建立连接工厂解耦，另一方面抽象出Standalone、Sentinel、RedisCluster 16 * 三种模式的环境配置类和一个统一的jedis客户端连接配置类（用于配置连接池和SSL连接）， 17 * 使得我们可以更加灵活方便根据实际业务场景需要来配置连接信息。 18 */ 19 @Configuration 20 public class RedisConfig { 21 22 /** 23 * 1.创建JedisPoolConfig对象。在该对象中完成一些链接池配置，连接池配置信息。 24 * 25 * @return 26 */ 27 @Bean 28 public JedisPoolConfig jedisPoolConfig() { 29 // 创建JedisPoolConfig对象 30 JedisPoolConfig config = new JedisPoolConfig(); 31 // 最大空闲数 32 config.setMaxIdle(10); 33 // 最小空闲数 34 config.setMinIdle(5); 35 // 最大链接数 36 config.setMaxTotal(20); 37 //当池内没有可用的连接时，最大等待时间 38 config.setMaxWaitMillis(10000); 39 return config; 40 } 41 42 /** 43 * 2.创建JedisConnectionFactory，配置redis链接信息。 44 * 45 * @param config 从IOC容器中将连接池拿去出来 46 * @return 47 */ 48 @Bean 49 public JedisConnectionFactory jedisConnectionFactory(JedisPoolConfig config) { 50 // 关联链接池的配置对象，不推荐使用了 51 // factory.setPoolConfig(config); 52 // 配置链接Redis的信息 53 // 主机地址，不推荐使用了 54 // factory.setHostName("192.168.70.128"); 55 // 端口，不推荐使用了 56 // factory.setPort(6379); 57 58 // 创建RedisStandaloneConfiguration对象 59 RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(); 60 // 然后根据该配置实例来初始化jedis连接工厂。 61 // 设置ip主机地址 62 redisStandaloneConfiguration.setHostName("192.168.110.140"); 63 // 设置在第几号redis数据库操作，默认操作第0个数据库 64 redisStandaloneConfiguration.setDatabase(0); 65 // 设置redis的密码 66 // redisStandaloneConfiguration.setPassword(RedisPassword.of("123456")); 67 // 设置端口号 68 redisStandaloneConfiguration.setPort(6379); 69 70 71 // 获得默认的连接池构造器 72 JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcb = JedisClientConfiguration.builder().usePooling(); 73 74 // 指定jedisPoolConifig来修改默认的连接池构造器 75 jpcb.poolConfig(config); 76 // 通过构造器来构造jedis客户端配置 77 JedisClientConfiguration jedisClientConfiguration = jpcb.build(); 78 79 // 将设置好的数据库链接传递到JedisConnectionFactory构造方法里面 80 // JedisConnectionFactory factory = new JedisConnectionFactory(redisStandaloneConfiguration); 81 82 // 返回，注入到ioc容器中 83 // 单机配置 + 客户端配置 = jedis连接工厂 84 return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration); 85 } 86 87 88 /** 89 * 3.创建RedisTemplate模板对象，用于执行Redis操作的方法。 90 * 91 * @param jedisConnectionFactory 92 * 93 * @return 94 */ 95 @Bean 96 public RedisTemplate<String, Object> redisTemplate(JedisConnectionFactory jedisConnectionFactory) { 97 // 创建RedisTemplate对象 98 RedisTemplate<String, Object> template = new RedisTemplate<>(); 99 // 关联，链接连接池工厂，RedisTemplate与JedisConnectionFactory关联 100 template.setConnectionFactory(jedisConnectionFactory); 101 // 为key设置序列化器 102 template.setKeySerializer(new StringRedisSerializer()); 103 // 为value设置序列化器 104 template.setValueSerializer(new StringRedisSerializer()); 105 return template; 106 } 107 108 109 /** 110 * jedis连接工厂 111 * 112 * @param jedisPoolConfig 113 * @return 114 */ 115 // @Bean 116 // public RedisConnectionFactory redisConnectionFactory(JedisPoolConfig jedisPoolConfig) { 117 // // 单机版jedis 118 // RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(); 119 // // 设置redis服务器的host或者ip地址 120 // redisStandaloneConfiguration.setHostName("192.168.110.140"); 121 // // 设置默认使用的数据库 122 // redisStandaloneConfiguration.setDatabase(0); 123 // // 设置密码 124 // // redisStandaloneConfiguration.setPassword(RedisPassword.of("123456")); 125 // // 设置redis的服务的端口号 126 // redisStandaloneConfiguration.setPort(6379); 127 // // 获得默认的连接池构造器 128 // // JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcb = (JedisClientConfiguration.JedisPoolingClientConfigurationBuilder) JedisClientConfiguration.builder(); 129 // 130 // // 获得默认的连接池构造器 131 // JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcb = JedisClientConfiguration.builder().usePooling(); 132 // 133 // // 指定jedisPoolConifig来修改默认的连接池构造器 134 // jpcb.poolConfig(jedisPoolConfig); 135 // // 通过构造器来构造jedis客户端配置 136 // JedisClientConfiguration jedisClientConfiguration = jpcb.build(); 137 // // 单机配置 + 客户端配置 = jedis连接工厂 138 // return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration); 139 // } 140 141 142 }
编写测试代码，测试整合环境。
1 package com.bie.springboot; 2 3 import org.junit.jupiter.api.Test; 4 import org.junit.runner.RunWith; 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.boot.test.context.SpringBootTest; 7 import org.springframework.data.redis.core.RedisTemplate; 8 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; 9 10 @RunWith(SpringJUnit4ClassRunner.class) 11 @SpringBootTest(classes = SpringdataRedisApplication.class) 12 class SpringdataRedisApplicationTests { 13 14 @Autowired 15 private RedisTemplate<String, Object> redisTemplate; 16 17 /*** 添加一个字符串 */ 18 @Test 19 public void testSet() { 20 this.redisTemplate.opsForValue().set("key", "我想要学好springboot"); 21 } 22 23 /*** 获取一个字符串 */ 24 @Test 25 public void testGet() { 26 String value = (String) this.redisTemplate.opsForValue().get("key"); 27 System.out.println(value); 28 } 29 30 }
如果报了下面所示的错误，如下所示：
1 . ____ _ __ _ _ 2 /\\\\ / ___\'_ __ _ _(_)_ __ __ _ \\ \\ \\ \\ 3 ( ( )\\___ | \'_ | \'_| | \'_ \\/ _` | \\ \\ \\ \\ 4 \\\\/ ___)| |_)| | | | | || (_| | ) ) ) ) 5 \' |____| .__|_| |_|_| |_\\__, | / / / / 6 =========|_|==============|___/=/_/_/_/ 7 :: Spring Boot :: (v2.2.6.RELEASE) 8 9 2020-05-16 23:19:54.910 INFO 5476 --- [ main] c.b.s.SpringdataRedisApplicationTests : Starting SpringdataRedisApplicationTests on DESKTOP-V37QSSE with PID 5476 (started by biehl in D:\\program\\idea\\IntelliJ IDEA 2019.1.3\\workspace_idea\\springdata-redis) 10 2020-05-16 23:19:54.914 INFO 5476 --- [ main] c.b.s.SpringdataRedisApplicationTests : No active profile set, falling back to default profiles: default 11 2020-05-16 23:19:56.826 INFO 5476 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode! 12 2020-05-16 23:19:56.830 INFO 5476 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode. 13 2020-05-16 23:19:56.887 INFO 5476 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 29ms. Found 0 Redis repository interfaces. 14 2020-05-16 23:19:57.186 ERROR 5476 --- [ main] o.s.boot.SpringApplication : Application run failed 15 16 java.lang.NoClassDefFoundError: redis/clients/jedis/util/Pool 17 at java.lang.Class.getDeclaredConstructors0(Native Method) ~[na:1.8.0_191] 18 at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) ~[na:1.8.0_191] 19 at java.lang.Class.getDeclaredConstructors(Class.java:2020) ~[na:1.8.0_191] 20 at org.springframework.boot.context.properties.ConfigurationPropertiesBindConstructorProvider.findConstructorBindingAnnotatedConstructor(ConfigurationPropertiesBindConstructorProvider.java:62) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 21 at org.springframework.boot.context.properties.ConfigurationPropertiesBindConstructorProvider.getBindConstructor(ConfigurationPropertiesBindConstructorProvider.java:48) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 22 at org.springframework.boot.context.properties.ConfigurationPropertiesBean$BindMethod.forType(ConfigurationPropertiesBean.java:311) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 23 at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.validate(ConfigurationPropertiesBeanDefinitionValidator.java:63) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 24 at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.postProcessBeanFactory(ConfigurationPropertiesBeanDefinitionValidator.java:45) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 25 at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:286) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] 26 at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] 27 at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] 28 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] 29 at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 30 at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 31 at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] 32 at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:126) [spring-boot-test-2.2.6.RELEASE.jar:2.2.6.RELEASE] 33 at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 34 at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 35 at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:123) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 36 at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 37 at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 38 at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 39 at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:98) [spring-test-5.2.5.RELEASE.jar:5.2.5.RELEASE] 40 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$5(ClassBasedTestDescriptor.java:337) [junit-jupiter-engine-5.5.2.jar:5.5.2] 41 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:342) [junit-jupiter-engine-5.5.2.jar:5.5.2] 42 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$6(ClassBasedTestDescriptor.java:337) [junit-jupiter-engine-5.5.2.jar:5.5.2] 43 at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_191] 44 at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_191] 45 at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) ~[na:1.8.0_191] 46 at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_191] 47 at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_191] 48 at java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312) ~[na:1.8.0_191] 49 at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:743) ~[na:1.8.0_191] 50 at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742) ~[na:1.8.0_191] 51 at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[na:1.8.0_191] 52 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:336) [junit-jupiter-engine-5.5.2.jar:5.5.2] 53 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:259) [junit-jupiter-engine-5.5.2.jar:5.5.2] 54 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$2(ClassBasedTestDescriptor.java:252) [junit-jupiter-engine-5.5.2.jar:5.5.2] 55 at java.util.Optional.orElseGet(Optional.java:267) ~[na:1.8.0_191] 56 at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$3(ClassBasedTestDescriptor.java:251) [junit-jupiter-engine-5.5.2.jar:5.5.2] 57 at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:29) ~[junit-jupiter-engine-5.5.2.jar:5.5.2] 58 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:106) ~[junit-jupiter-engine-5.5.2.jar:5.5.2] 59 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.5.2.jar:1.5.2] 60 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:105) ~[junit-jupiter-engine-5.5.2.jar:5.5.2] 61 at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:69) ~[junit-jupiter-engine-5.5.2.jar:5.5.2] 62 at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:107) ~[junit-platform-engine-1.5.2.jar:1.5.2] 63 at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.5.2.jar:1.5.2] 64 at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:107) ~[junit-platform-engine-1.5.2.jar:1.5.2] SpringBoot2 整合Ehcache组件，轻量级缓存管理