Spring Boot集成Redis做数据缓存

た入场券 2022-05-17 04:23 278阅读 0赞

Redis就不介绍了，上一篇有，想了解的可以去看一看或者到Redis的官网去看一下。

## 1、加载包 ##

在pom.xml中加入三坐标引入spring-boot-starter-redis的 jar包，也可到[http://maven.aliyun.com/mvn/search][http_maven.aliyun.com_mvn_search]里面搜索spring-boot-starter-redis下载 jar 然后直接引入

<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-redis</artifactId>
    			<version>1.4.7.RELEASE</version>
    		</dependency>

## 2、在SpringBoot的配置文件配置Redis数据库 ##

配置文件有两种，一种是 yml 配置文件，另外一种是 properties，我使用的是 yml 配置文件，properties配置文件直接把 ：改成 "."就可以了

redis: 
      host: 127.0.0.1
      port: 6379
      timeout: 20000
      pool:
          max-active: 8
          min-idle: 0
          max-idle: 8
          max-wait: -1

## 3、添加Redis的配置方法 ##

import org.springframework.cache.annotation.CachingConfigurerSupport;
    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.Jackson2JsonRedisSerializer;
    import org.springframework.data.redis.serializer.StringRedisSerializer;
    
    import com.fasterxml.jackson.databind.ObjectMapper;
    
    @Configuration
    @EnableCaching
    public class RedisConfig extends CachingConfigurerSupport{
    	 @Bean
    	   public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
    	      RedisTemplate<Object, Object> template = new RedisTemplate<>();
    	      template.setConnectionFactory(connectionFactory);
    	 
    	      //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
    	      Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
    	 
    	      ObjectMapper mapper = new ObjectMapper();
    	      mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    	      serializer.setObjectMapper(mapper);
    	 
    	      template.setValueSerializer(serializer);
    	      //使用StringRedisSerializer来序列化和反序列化redis的key值
    	      template.setKeySerializer(new StringRedisSerializer());
    	      template.afterPropertiesSet();
    	      return template;
    	   }
    
    }

## 4、添加 Redis 的工具类（可自己扩展，这几个可以满足大部分的业务需求） ##

import java.io.Serializable;
    import java.util.List;
    import java.util.Set;
    import java.util.concurrent.TimeUnit;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.HashOperations;
    import org.springframework.data.redis.core.ListOperations;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.core.SetOperations;
    import org.springframework.data.redis.core.ValueOperations;
    import org.springframework.data.redis.core.ZSetOperations;
    import org.springframework.stereotype.Service;
    
    /**
     * Redis工具类
     * @author wangchl
     *
     */
    @Service
    public class RedisUtils {
        @Autowired
        private RedisTemplate redisTemplate;
        /**
         * 写入缓存
         * @param key
         * @param value
         * @return
         */
        public boolean set(final String key, Object value) {
            boolean result = false;
            try {
                ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
                operations.set(key, value);
                result = true;
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }
        /**
         * 写入缓存设置时效时间
         * @param key
         * @param value
         * @return
         */
        public boolean set(final String key, Object value, Long expireTime) {
            boolean result = false;
            try {
                ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
                operations.set(key, value);
                redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
                result = true;
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }
        /**
         * 批量删除对应的value
         * @param keys
         */
        public void remove(final String... keys) {
            for (String key : keys) {
                remove(key);
            }
        }
    
        /**
         * 批量删除key
         * @param pattern
         */
        public void removePattern(final String pattern) {
            Set<Serializable> keys = redisTemplate.keys(pattern);
            if (keys.size() > 0)
                redisTemplate.delete(keys);
        }
        /**
         * 删除对应的value
         * @param key
         */
        public void remove(final String key) {
            if (exists(key)) {
                redisTemplate.delete(key);
            }
        }
        /**
         * 判断缓存中是否有对应的value
         * @param key
         * @return
         */
        public boolean exists(final String key) {
            return redisTemplate.hasKey(key);
        }
        /**
         * 读取缓存
         * @param key
         * @return
         */
        public Object get(final String key) {
            Object result = null;
            ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
            result = operations.get(key);
            return result;
        }
        /**
         * 哈希 添加
         * @param key
         * @param hashKey
         * @param value
         */
        public void hmSet(String key, Object hashKey, Object value){
            HashOperations<String, Object, Object>  hash = redisTemplate.opsForHash();
            hash.put(key,hashKey,value);
        }
    
        /**
         * 哈希获取数据
         * @param key
         * @param hashKey
         * @return
         */
        public Object hmGet(String key, Object hashKey){
            HashOperations<String, Object, Object>  hash = redisTemplate.opsForHash();
            return hash.get(key,hashKey);
        }
    
        /**
         * 列表添加
         * @param k
         * @param v
         */
        public void lPush(String k,Object v){
            ListOperations<String, Object> list = redisTemplate.opsForList();
            list.rightPush(k,v);
        }
    
        /**
         * 列表获取
         * @param k
         * @param l
         * @param l1
         * @return
         */
        public List<Object> lRange(String k, long l, long l1){
            ListOperations<String, Object> list = redisTemplate.opsForList();
            return list.range(k,l,l1);
        }
    
        /**
         * 集合添加
         * @param key
         * @param value
         */
        public void add(String key,Object value){
            SetOperations<String, Object> set = redisTemplate.opsForSet();
            set.add(key,value);
        }
    
        /**
         * 集合获取
         * @param key
         * @return
         */
        public Set<Object> setMembers(String key){
            SetOperations<String, Object> set = redisTemplate.opsForSet();
            return set.members(key);
        }
    
        /**
         * 有序集合添加
         * @param key
         * @param value
         * @param scoure
         */
        public void zAdd(String key,Object value,double scoure){
            ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
            zset.add(key,value,scoure);
        }
    
        /**
         * 有序集合获取
         * @param key
         * @param scoure
         * @param scoure1
         * @return
         */
        public Set<Object> rangeByScore(String key,double scoure,double scoure1){
            ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
            return zset.rangeByScore(key, scoure, scoure1);
        }
    }

## 5、Redis测试类（我这边数据为了展示效果我就写固定了，你们自己改一下） ##

import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    
    
    @Controller
    @RequestMapping(value="/redis")
    public class RedisTestController {
    	
    	@Autowired
    	private RedisUtils redisUtils;
    	
    	@GetMapping("/test")
            public void Test() {
        //数据我这边写固定了的，就展示一个效果而已，你们那里自己改改就可以了，Redis可以使用注解形式的，你们自己可以扩展
    	Integer id = 123456;
            redisUtils.set("121233", id);
            System.out.println(redisUtils.get("121233"));
        }
    
       
    }

## 6、好了，Redis 里面也有了 ##

![70][]

[http_maven.aliyun.com_mvn_search]: http://maven.aliyun.com/mvn/search
[70]: /images/20220517/3da3f02e30fd4189b1d57608bb532415.png