springboot操作redis

原创已于 2022-03-27 15:07:39 修改 · 427 阅读

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#springboot #redis

于 2022-03-27 13:49:21 首次发布

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本文介绍如何在Spring Boot项目中集成Redis，并提供详细的配置步骤、代码示例及自定义Redis工具类。

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1、引用

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <!--集成redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-redis</artifactId>
            <version>1.4.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-context</artifactId>
            <version>2.0.3.RELEASE</version>
        </dependency>

2、配置文件

spring.redis.database= 0 
spring.redis.host=127.0.0.1
#Redis服务器连接端口
spring.redis.port=6379
#Redis服务器连接密码（默认为空）
spring.redis.password=
#连接池最大连接数（使用负值表示没有限制）
spring.redis.max-active = 8
#连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.max-wait=-1
#连接池中的最大空闲连接
spring.redis.max-idle=8
#连接池中的最小空闲连接
spring.redis.min-idle=0
#连接超时时间（毫秒）
spring.redis.timeout=3000

3、配置类

package com.jbossjf.bootproject.common;

import java.lang.reflect.Method;
import org.springframework.beans.factory.annotation.Value;
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.cloud.context.config.annotation.RefreshScope;
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.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.databind.ObjectMapper;
@Configuration
@EnableCaching
@RefreshScope
public class RedisConfig extends CachingConfigurerSupport{
    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    @Value("${spring.redis.timeout}")
    private int timeout;
    @Value("${spring.redis.password}")
    private String password;
    @Value("${spring.redis.max-active}")
    private int maxActive;
    @Value("${spring.redis.max-wait}")
    private int maxWait;
    @Value("${spring.redis.max-idle}")
    private int maxIdle;
    @Value("${spring.redis.min-idle}")
    private int minIdle;

    @RefreshScope
    @Bean
    public KeyGenerator wiselyKeyGenerator(){
        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();
            }
        };
    }

    @RefreshScope
    @Bean
    public JedisConnectionFactory redisConnectionFactory() {
        JedisConnectionFactory factory = new JedisConnectionFactory();
        factory.setHostName(host);
        factory.setPort(port);
        factory.setTimeout(timeout); //设置连接超时时间
        factory.setPassword(password);
        factory.getPoolConfig().setMaxIdle(maxIdle);
        factory.getPoolConfig().setMinIdle(minIdle);
        factory.getPoolConfig().setMaxTotal(maxActive);
        factory.getPoolConfig().setMaxWaitMillis(maxWait);
        return factory;
    }

    @RefreshScope
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisCacheManager cacheManager =RedisCacheManager.create(factory);
        // Number of seconds before expiration. Defaults to unlimited (0)
        //cacheManager.setDefaultExpiration(10); //设置key-value超时时间
        return cacheManager;
    }

    @RefreshScope
    @Bean
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        setSerializer(template); //设置序列化工具，这样ReportBean不需要实现Serializable接口
        template.afterPropertiesSet();
        return template;
    }

    @RefreshScope
    private void setSerializer(StringRedisTemplate template) {
        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);
    }
}

4、Redis帮助类

package com.jbossjf.bootproject.common;
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;
@Service
public class RedisUtil {
    @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);
    }
}

5、请求类

    @CrossOrigin
    @ResponseBody
    @RequestMapping(value = "/API/SaveRedis", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
    public int SaveRedis(@RequestBody JSONObject jsonParam) {

        try {

            //切换数据库
//            int db = 1;
//            JedisConnectionFactory jedisConnectionFactory = (JedisConnectionFactory) stringRedisTemplate.getConnectionFactory();
//            jedisConnectionFactory.setDatabase(db);
//            stringRedisTemplate.setConnectionFactory(jedisConnectionFactory);
//            ValueOperations valueOperations = stringRedisTemplate.opsForValue();
            String openid = jsonParam.getString("openid");
            if(openid.isEmpty())
            {
                return 0;
            }
            String productid = jsonParam.getString("id");
            if(productid==null)
            {
                return  0;
            }
            String quantity = jsonParam.getString("quantity");
            String key = "ShopCart" + "-" + openid;
            //产品ID - 名称 - 规格 - 数量
            Product product = _ProductService.GetBean(productid);

            Object value = _RedisUtil.get(key);
            String old_value = "";
            if (value != null) {
                value = _RedisUtil.get(key).toString();
            }
            if (product != null && !product.getName().isEmpty()) {
                if (value == null)  {
                    value = "[{ \"id\":" + productid+ "\"," + "\"name\":\"" + product.getName()+ "\"," + "\"specs\":\"" + product.getSpecs() +"\","+ "\"price\":\"" + product.getPrice()  + "\"," + "\"quantity\":\"" + quantity + "\"," + "\"checked\":\"true\"" + "}]";

                    // JSONArray jsonArray= JSONArray.fromObject(value);
                } else {
                    old_value = JSONUtil.GetValue(productid, JSONArray.fromObject(value));
                    if(!old_value.isEmpty())
                    {
                        String[] v_array = old_value.split("_");
                        String old_quantity = v_array[4];
                        JSONArray s =JSONUtil.upateQuantity(productid,String.valueOf((Integer.parseInt(old_quantity)+1)),JSONArray.fromObject(value));
                        value = s.toString();
                    }else {
                        String new_value ="[{ \"id\":" + productid+ "\"," + "\"name\":\"" + product.getName()+ "\"," + "\"specs\":\"" + product.getSpecs() +"\","+ "\"price\":\"" + product.getPrice()  + "\"," + "\"quantity\":\"" + quantity + "\"," + "\"checked\":\"true\"" + "}]";

                        // json对象1
                        JSONObject json1 = new JSONObject();
                        json1.accumulate("id",productid);
                        json1.accumulate("name",product.getName());
                        json1.accumulate("specs",product.getSpecs() );
                        json1.accumulate("price",product.getPrice() );
                        json1.accumulate("quantity",quantity );
                        json1.accumulate("checked","true" );
                        JSONArray s = JSONUtil.insert(json1, JSONArray.fromObject(value));
                        value = s.toString();
                    }
                }
            }

            _RedisUtil.set(key, value);
            return 1;

        } catch (Exception e) {
            System.out.print(e.getMessage().toString());
            logger.info(e.getStackTrace().toString());
        }

        return 0;
    }