SpringBoot搭建ssm项目三Redis缓存

Love The Way You Lie 2022-05-14 00:25 320阅读 0赞

一、配置服务机环境

1、centos安装redis

进入centos终端：

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(1)下载redis的压缩文件到指定的目录：wget http://download.redis.io/releases/redis-4.0.2.tar.gz

(2)加压压缩文件：tar xzf redis-4.0.2.tar.gz

(3) 进入压缩后的文件 cd redis-4.0.2

(4)执行安装命令  make   make install

(5)启动redis,检测是否安装成功：redis-server

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调用redis客户端测试redis存取键值对

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进入redis客户端可以看到redis的host和port

(6)设置redis密码

进入root的redis目录：  cd redis-4.0.2

vi命令打开redis.conf，找到下图的\#requirepass  foobared去掉\#，改为requirepass 123456

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修改redis的host(注释掉本机host:127.0.0.1,修改为虚拟机的ip)，   关闭掉redis的保护模式，不然远程连接会失败

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二、后台代码配置redis

1、pom.xml文件加入reids依赖

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

application配置redis参数

spring.redis.database=0  
    spring.redis.host=192.168.137.133
    spring.redis.port=6379  
    spring.redis.password=123456
    spring.redis.jedis.pool.max-idle=8  
    spring.redis.jedis.pool.min-idle=0

2、创建redis的工具

package cn.fcw.bb.webapply.redis;
    import com.fasterxml.jackson.annotation.JsonAutoDetect;
    import com.fasterxml.jackson.annotation.PropertyAccessor;
    import com.fasterxml.jackson.databind.ObjectMapper;
    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.RedisCacheManager;
    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.Jackson2JsonRedisSerializer;
    
    
    
    @Configuration
    @EnableCaching
    public class RedisConfigurer extends CachingConfigurerSupport {
    
        @Bean
        public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
            StringRedisTemplate template = new StringRedisTemplate(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);
            template.setValueSerializer(jackson2JsonRedisSerializer);
            template.afterPropertiesSet();
            return template;
        }
    
    
        @Bean
        public KeyGenerator keyGenerator() {
            return (target, method, 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();
            };
        }
        
    
        @SuppressWarnings("rawtypes")
        @Bean
        public CacheManager cacheManager(RedisConnectionFactory factory) {
    //        RedisCacheConfiguration redisCacheConfiguration=RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(1));
    //        return RedisCacheManager.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
    //                 .cacheDefaults(redisCacheConfiguration).build();
            return RedisCacheManager.create(factory);
    
        }
    
    }

package cn.fcw.bb.webapply.redis;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.annotation.Bean;
    import org.springframework.data.redis.core.*;
    import org.springframework.stereotype.Component;
    
    import java.io.Serializable;
    import java.util.List;
    import java.util.Set;
    import java.util.concurrent.TimeUnit;
    
    
    @Component
    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 , TimeUnit timeUnit) {
            boolean result = false;
            try {
                ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
                operations.set(key, value);
                redisTemplate.expire(key, expireTime, timeUnit);
                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);
        }
    }

3、redis业务应用 将用户信息存储到redis的数据库

@RunWith(SpringRunner.class)
    @SpringBootTest
    public class RedisTest {
      
        @Autowired
        private IUserMapper userMapper;
    
        @Autowired
        private RedisUtils redisUtils;
        
        @Test
        public  void  addObject(){  //把userBean对象存入redis
            UserBean  userBean= userMapper.findUserById(2);
            System.out.println("user="+userBean.toString());
            redisUtils.set("user",userBean);
        }
        
    
        @Test
        public  void   redisListTest(){  //向redis中存入一个key为list的集合
            redisUtils.add("list","Spring");
            redisUtils.add("list","EBJ");
            redisUtils.add("list","Hibernate");
            redisUtils.add("list","Struts2");
        }
    
    }

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三、使用Redis Desktop Manager可视化工具查看redis数据库

三、windown![70 7][]

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