猴子也能懂的springboot教程(三) - springboot整合Redis

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摘要

本文介绍
springboot整合redis
采用RedisCacheManager作为缓存管理器
并使用fastjson序列化

承接上篇
猴子也能懂的springboot教程(二) - springboot整合Mybatis
本次我们在原先代码基础上整合Redis
直接上代码。。。

添加依赖

在pom.xml中添加依赖文件

    
    
        org.springframework.boot
        spring-boot-starter-data-redis
    
    
    
        com.alibaba
        fastjson
        1.2.31
    

新增配置文件

在spring下级添加redis配置文件

spring:
  #mysql 配置略（参见上文）
  #redis
  redis:
    database: 0
    host: 192.168.162.134
    port: 6379
    password: redis
    pool:
      jedis:
        max-active: 200
        max-wait: -1
        max-idle: 10
        min-idle: 1
    timeout: 1000

自定义Redis序列化工具

创建com.gao.utils.FastJsonRedisSerializer类实现RedisSerializer接口

package com.gao.utils;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import java.nio.charset.Charset;

public class FastJsonRedisSerializer implements RedisSerializer{

    private final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
    private Class clazz;

    public FastJsonRedisSerializer(Class clazz) {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if(null == t) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (null == bytes || bytes.length <= 0) {
            return null;
        }
        String str = new String(bytes,DEFAULT_CHARSET);
        return (T)JSON.parseObject(str,clazz);
    }
}

配置Redis

创建com.gao.config.RedisConfig类，

package com.gao.config;

import com.alibaba.fastjson.parser.ParserConfig;
import com.gao.utils.FastJsonRedisSerializer;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.lang.reflect.Method;
import java.time.Duration;

@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{

    @Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory connectionFactory) {

        //初始化一个RedisCacheWriter
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
        //序列化方式
        FastJsonRedisSerializer