【springboot系列】springboot接入redis

springboot接入redis

一、引入依赖

    <dependency>
      <groupId>redis.clientsgroupId>
      <artifactId>jedisartifactId>
    dependency>
    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>fastjsonartifactId>
      <version>1.2.38version>
    dependency>

二、添加配置application.properties

#redis远程服务器redis
redis.host=47.112.17.9
redis.port=6379
redis.timeout=3
redis.password=haibo1118
redis.poolMaxTotal=10
redis.poolMaxIdle=10
redis.poolMaxWait=3

三、读取配置文件

通过以下注解读取redis开头的配置文件（二中配置文件）

@ConfigurationProperties(prefix = "redis")

读取配置完整代码如下:

package xyz.haibofaith.miaosha.redis;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * @author:haibo.xiong
 * @date:2019/5/6
 * @description:
 */
@Component
@ConfigurationProperties(prefix = "redis")
public class RedisConfig {
    private String host;
    private int port;
    private int timeout;//秒
    private String password;
    private int poolMaxTotal;
    private int poolMaxIdle;
    private int poolMaxWait;//秒
	//略set get方法
}

四、Jedis工厂

package xyz.haibofaith.miaosha.redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;

import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

@Service
public class RedisPoolFactory {

	@Autowired
	RedisConfig redisConfig;
	
	@Bean
	public JedisPool JedisPoolFactory() {
		JedisPoolConfig poolConfig = new JedisPoolConfig();
		poolConfig.setMaxIdle(redisConfig.getPoolMaxIdle());
		poolConfig.setMaxTotal(redisConfig.getPoolMaxTotal());
		poolConfig.setMaxWaitMillis(redisConfig.getPoolMaxWait() * 1000);
		JedisPool jp = new JedisPool(poolConfig, redisConfig.getHost(), redisConfig.getPort(),
				redisConfig.getTimeout()*1000, redisConfig.getPassword(), 0);
		return jp;
	}
	
}

五、redis操作类

package xyz.haibofaith.miaosha.redis;

import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

/**
 * @author:haibo.xiong
 * @date:2019/5/6
 * @description:
 */
@Service
public class RedisService {

    @Autowired
    JedisPool jedisPool;

    /**
     * 获取当个对象
     * */
    public <T> T get(String key,  Class<T> clazz) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            String  str = jedis.get(realKey);
            T t =  stringToBean(str, clazz);
            return t;
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 设置对象
     * */
    public <T> boolean set(String key,  T value) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            String str = beanToString(value);
            if(str == null || str.length() <= 0) {
                return false;
            }
            //生成真正的key
            String realKey  = key;
            int seconds =  0;
            if(seconds <= 0) {
                jedis.set(realKey, str);
            }else {
                jedis.setex(realKey, seconds, str);
            }
            return true;
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 判断key是否存在
     * */
    public <T> boolean exists(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            return  jedis.exists(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 增加值
     * */
    public <T> Long incr(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = key;
            return  jedis.incr(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    /**
     * 减少值
     * */
    public <T> Long decr(String key) {
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  =  key;
            return  jedis.decr(realKey);
        }finally {
            returnToPool(jedis);
        }
    }

    private <T> String beanToString(T value) {
        if(value == null) {
            return null;
        }
        Class<?> clazz = value.getClass();
        if(clazz == int.class || clazz == Integer.class) {
            return ""+value;
        }else if(clazz == String.class) {
            return (String)value;
        }else if(clazz == long.class || clazz == Long.class) {
            return ""+value;
        }else {
            return JSON.toJSONString(value);
        }
    }

    @SuppressWarnings("unchecked")
    private <T> T stringToBean(String str, Class<T> clazz) {
        if(str == null || str.length() <= 0 || clazz == null) {
            return null;
        }
        if(clazz == int.class || clazz == Integer.class) {
            return (T)Integer.valueOf(str);
        }else if(clazz == String.class) {
            return (T)str;
        }else if(clazz == long.class || clazz == Long.class) {
            return  (T)Long.valueOf(str);
        }else {
            return JSON.toJavaObject(JSON.parseObject(str), clazz);
        }
    }

    private void returnToPool(Jedis jedis) {
        if(jedis != null) {
            jedis.close();
        }
    }

}

五、Controller测试

    @Autowired
    private RedisService redisService;

    @RequestMapping("/redisGet")
    @ResponseBody
    public Result<String> redisGet(){
        Long value = redisService.get("key1",Long.class);
        return Result.success(value.toString());
    }

    @RequestMapping("/redisSet")
    @ResponseBody
    public Result<String> redisSet(){
        boolean b = redisService.set("key2","hello,bobo");
        String value = redisService.get("key2",String.class);
        return Result.success(value);
    }

测试结果如下：

六、代码地址

github地址