Redis的Template

分为两种, 一种是StringRedisTemplate，另一种是RedisTemplate

根据不同的数据类型，大致的操作也分为这5种，以StringRedisTemplate为例

stringRedisTemplate.opsForValue()  --String
stringRedisTemplate.opsForList()  --List
stringRedisTemplate.opsForSet()  --Set
stringRedisTemplate.opsForHash()  --Hash
stringRedisTemplate.opsForZset()  -Zset

1、导入依赖

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

2、修改配置文件

spring.redis.host= ip地址
spring.redis.port=6379
# Redis服务器连接密码（默认为空）  
spring.redis.password=

新版用Lettuce

3、添加测试类

    @AutowiredStringRedisTemplate stringRedisTemplate;//操作字符串【常用】@AutowiredRedisTemplate redisTemplate;//操作k-v都是对象    @Testpublic void test01(){
//        stringRedisTemplate.opsForValue().append("msg", "hello");String msg = stringRedisTemplate.opsForValue().get("msg");System.out.println(msg);}

3、测试保存对象

对象需要序列化

1、实现序列化类

public class Employee implements Serializable {

2、将对象存储到Redis

@Test
public  void test02(){Employee emp = employeeMapper.getEmpById(2);redisTemplate.opsForValue().set("emp-01", emp);
}

4、以json方式传输对象

1、新建一个Redis的配置类MyRedisConfig,

@Configuration
public class MyRedisConfig {@Beanpublic RedisTemplate<Object, Employee> empRedisTemplate(RedisConnectionFactory redisConnectionFactory)throws UnknownHostException {RedisTemplate<Object, Employee> template = new RedisTemplate<Object, Employee>();template.setConnectionFactory(redisConnectionFactory);Jackson2JsonRedisSerializer<Employee> jsonRedisSerializer = new Jackson2JsonRedisSerializer<Employee>(Employee.class);template.setDefaultSerializer(jsonRedisSerializer);return template;}

2、编写测试类

 @AutowiredRedisTemplate<Object,Employee> empRedisTemplate;
@Test
public  void test02(){Employee emp = employeeMapper.getEmpById(2);empRedisTemplate.opsForValue().set("emp-01", emp);}

Redis集成springboot

源码分析

@Configuration(proxyBeanMethods = false
)
@ConditionalOnClass({RedisOperations.class})
@EnableConfigurationProperties({RedisProperties.class})
@Import({LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class})
public class RedisAutoConfiguration {public RedisAutoConfiguration() {}@Bean@ConditionalOnMissingBean(name = {"redisTemplate"})//我们可以自定义template@ConditionalOnSingleCandidate(RedisConnectionFactory.class)public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {//两个泛型都是Object，后续我们使用需要强转<String ,Object>RedisTemplate<Object, Object> template = new RedisTemplate();template.setConnectionFactory(redisConnectionFactory);return template;}@Bean@ConditionalOnMissingBean//String是最常使用的类型，所以单独弄了个bean@ConditionalOnSingleCandidate(RedisConnectionFactory.class)public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {StringRedisTemplate template = new StringRedisTemplate();template.setConnectionFactory(redisConnectionFactory);return template;}
}

自定义template

请添加图片描述

要记得把对象序列化，不然会报错。
默认用的是jdk序列化

@Configuration
public class RedisConfig {@Bean@SuppressWarnings("all")public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();template.setConnectionFactory(factory);Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);ObjectMapper om = new ObjectMapper();om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);jackson2JsonRedisSerializer.setObjectMapper(om);StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();// key采用String的序列化方式template.setKeySerializer(stringRedisSerializer);// hash的key也采用String的序列化方式template.setHashKeySerializer(stringRedisSerializer);// value序列化方式采用jacksontemplate.setValueSerializer(jackson2JsonRedisSerializer);// hash的value序列化方式采用jacksontemplate.setHashValueSerializer(jackson2JsonRedisSerializer);template.afterPropertiesSet();return template;}
}

请添加图片描述

工具类

https://www.cnblogs.com/zeng1994/p/03303c805731afc9aa9c60dbbd32a323.html

https://www.cnblogs.com/zhzhlong/p/11434284.html

序列化

默认RedisTemplate都是jdk序列化

占用高，前面带个类型
不可阅读

字符串序列化方式：StringRedisTemplate
json序列化方式：用RedisTemplate，自定义序列化方式

附录

其他配置

# Redis数据库索引（默认为0）  
spring.redis.database=0  
# 连接池最大连接数（使用负值表示没有限制）  
spring.redis.pool.max-active=200  
# 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=10 
# 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=1000