Java項目集成Redis

1.項目pom.xml中添加Jedis依賴

<dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
</dependency>

2.項目application.properties中添加Redis配置信息

# Redis 相關配置
redis.host=127.0.0.1
redis.port=6379
redis.password=112233
redis.timeout=300
redis.poolMaxTotal=10
redis.poolMaxIdle=10
redis.poolMaxWait=3

3.com.xxx.redis包：

　　①RedisConfig類：讀取配置文件中的Redis配置信息

@Component
@ConfigurationProperties(prefix="redis")
public class RedisConfig {

    private String host;
    private int port;
    //秒
    private int timeout;
    private String password;
    private int poolMaxTotal;
    private int poolMaxIdle;
    //秒
    private int poolMaxWait;

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public int getTimeout() {
        return timeout;
    }

    public void setTimeout(int timeout) {
        this.timeout = timeout;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getPoolMaxTotal() {
        return poolMaxTotal;
    }

    public void setPoolMaxTotal(int poolMaxTotal) {
        this.poolMaxTotal = poolMaxTotal;
    }

    public int getPoolMaxIdle() {
        return poolMaxIdle;
    }

    public void setPoolMaxIdle(int poolMaxIdle) {
        this.poolMaxIdle = poolMaxIdle;
    }

    public int getPoolMaxWait() {
        return poolMaxWait;
    }

    public void setPoolMaxWait(int poolMaxWait) {
        this.poolMaxWait = poolMaxWait;
    }
 }

　　②RedisPoolFactory類：通過JedisPool的構造方法及配置參數，獲取JedisPool

　　

@Service
public class RedisPoolFactory {

    @Autowired
    private RedisConfig redisConfig;

    /**
     * 獲得的JedisPool注入Spring的容器中
     * @return
     */
    @Bean
    public JedisPool jedisPoolFactory() {

        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxTotal(redisConfig.getPoolMaxTotal());
        jedisPoolConfig.setMaxIdle(redisConfig.getPoolMaxIdle());
        jedisPoolConfig.setMaxWaitMillis(redisConfig.getPoolMaxWait() * 1000);

        JedisPool jedisPool = new JedisPool(jedisPoolConfig, redisConfig.getHost(),
                redisConfig.getPort(), redisConfig.getTimeout(), redisConfig.getPassword(), 0);

        return jedisPool;
    }

　　③KeyPrefix類：定義各個對象存儲在Redis中的key的前綴

　　

public interface KeyPrefix {

    public int expireSeconds();

    public String getPrefix();


}

 

public abstract class BasePrefix implements KeyPrefix{

    private int expireSeconds;

    private String prefix;

    //0代表永不過期
    public BasePrefix(String prefix) {
        this(0,prefix);
    }

    public BasePrefix(int expireSeconds, String prefix) {
        this.expireSeconds = expireSeconds;
        this.prefix = prefix;
    }

    @Override
    public int expireSeconds(){
        return expireSeconds;
    }


    @Override
    public String getPrefix(){
        String className = getClass().getSimpleName();
        return className+":" + prefix;
    }

}

public class UserKey extends BasePrefix{

    /**
     * 父類構造方法
     * @param prefix
     */
    private UserKey(String prefix) {
        super(prefix);
    }

    private UserKey(int expireSeconds, String prefix) {
        super(expireSeconds, prefix);
    }


    public static UserKey getById = new UserKey(30, "id");
    public static UserKey getByName = new UserKey(30, "name");
}

 

　　④RedisService類：通過JedisPool獲取Jedis;通過Jedis客戶端處理緩存數據

@Service
public class RedisService {

    @Autowired
    private RedisPoolFactory redisPoolFactory;

    /**
     * 獲取對象
     * @param key
     * @param clazz
     * @param <T>
     * @return
     */
    public <T> T getRedis(KeyPrefix prefix,String key,  Class<T> clazz) {

        JedisPool jedisPool = redisPoolFactory.jedisPoolFactory();
        Jedis jedis = null;
        try{
            jedis = jedisPool.getResource();

            String realKey = prefix.getPrefix() + key;
            String value = jedis.get(realKey);
            T realValue = stringToBean(value,clazz);
            return realValue;
        }finally{
            returnToPool(jedis);
        }

    }

    public <T> boolean setRedis(KeyPrefix prefix,String key,  T value) {

        JedisPool jedisPool = redisPoolFactory.jedisPoolFactory();
        Jedis jedis = null;
        try{
            jedis = jedisPool.getResource();

            String valueStr = beanToString(value);

            String realKey = prefix.getPrefix() + key;

            if(valueStr == null || valueStr.length() <= 0) {
                return false;
            }
            jedis.set(realKey, valueStr);

            return true;
        }finally{
            returnToPool(jedis);
        }

    }

    /**
     * 刪除
     * */
    public boolean delete(KeyPrefix prefix, String key) {
        JedisPool jedisPool = redisPoolFactory.jedisPoolFactory();
        Jedis jedis = null;
        try {
            jedis =  jedisPool.getResource();
            //生成真正的key
            String realKey  = prefix.getPrefix() + key;
            long ret =  jedis.del(realKey);
            return ret > 0;
        }finally {
            returnToPool(jedis);
        }
    }

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


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


    public static <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")
    public static <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);
        }
    }
}

 4. 控制層：連接Redis服務器，測試

 1      /**

 * 獲取用戶

 * 測試Redis服務  4  * @return
     */
    @RequestMapping("/testRedisGet")  7  @ResponseBody  8     public Result<User> testRedis(@RequestParam("id") int id){  9 
        User  user  = redisService.getRedis(UserKey.getById,id + "", User.class); 11 
        return Result.success(user); 13  } 14 
    //寫入Redis
    @RequestMapping("/testRedisSet") 17  @ResponseBody 18     public Result<User> testRedisSet(@RequestParam("id") int id, 19                                      @RequestParam("name") String name){ 20 
        User user  = new User(); 22  user.setId(id); 23  user.setName(name); 24         redisService.setRedis(UserKey.getById,id + "", user); 25 
        return Result.success(user); 27     }