Springboot项目中使用redis的配置详解

<?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.lyy</groupId>
    <artifactId>redis-test</artifactId>
    <version>0.1-SNAPSHOT</version>
 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <!--始终从仓库中获取-->
        <!--<relativePath/>-->
    </parent>
 
    <dependencies>
        <!--web应用基本环境，如mvc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <!--redis包-->
      <em style="color:transparent">本文来源[email protected]搞@^&代*@码网(</em>  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
    </dependencies>
</project>

server:
  port: 11011
  servlet:
    context-path: /api/v1
 
spring:
  redis:
    # Redis数据库索引（默认为0）
    database: 0
    # Redis服务器地址
    host: 127.0.0.1
    # Redis服务器连接端口
    port: 6379
#     Redis服务器连接密码（默认为空）
#    password: 123456

package com.apollo.config;
 
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
/**
 * @author ：apollo
 * @since ：Created in 2019/2/22
 */
@Configuration
@EnableCaching
public class RedisConfig {
 
    @Autowired
    private ObjectMapper objectMapper;
 
    /**
     * 自定义springSessionDefaultRedisSerializer对象，将会替代默认的SESSION序列化对象。
     * 默认是JdkSerializationRedisSerializer，缺点是需要类实现Serializable接口。
     * 并且在反序列化时如果异常会抛出SerializationException异常，
     * 而SessionRepositoryFilter又没有处理异常，故如果序列化异常时就会导致请求异常
     */
    @Bean(name = "springSessionDefaultRedisSerializer")
    public GenericJackson2JsonRedisSerializer getGenericJackson2JsonRedisSerializer() {
        return new GenericJackson2JsonRedisSerializer();
    }
 
    /**
     * JacksonJsonRedisSerializer和GenericJackson2JsonRedisSerializer的区别：
     * GenericJackson2JsonRedisSerializer在json中加入@class属性，类的全路径包名，方便反系列化。
     * JacksonJsonRedisSerializer如果存放了List则在反系列化的时候，
     * 如果没指定TypeReference则会报错java.util.LinkedHashMap cannot be cast。
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(connectionFactory);
 
        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer =
                            new Jackson2JsonRedisSerializer(Object.class);
 
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
 
        redisTemplate.setHashKeySerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
 
        redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setEnableDefaultSerializer(true);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

package com.apollo;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
/**
 * @author ：apollo
 * @since ：Created in 2019/2/22
 */
@SpringBootApplication
public class Application  {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}