基于spring Boot的Java秒杀系统

package cn.tedu.miaosha.redis; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.alibaba.fastjson.JSON; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; @Service public class RedisService { @Autowired JedisPool jedisPool; /** * 获取当个对象 * */ public <T> T get(KeyPrefix prefix, String key, Class<T> clazz) { Jedis jedis = null; try { jedis = jedisPool.getResource(); //生成真正的key String realKey = prefix.getPrefix() + key; String str = jedis.get(realKey); T t = stringToBean(str, clazz); return t; }finally { returnToPool(jedis); } } /** * 设置对象 * */ public <T> boolean set(KeyPrefix prefix, 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 = prefix.getPrefix() + key; int seconds = prefix.expireSeconds(); 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(KeyPrefix prefix, String key) { Jedis jedis = null; try { jedis = jedisPool.getResource(); //生成真正的key String realKey = prefix.getPrefix() + key; return jedis.exists(realKey); }finally { returnToPool(jedis); } } /** * 增加值 * */ public <T> Long incr(KeyPrefix prefix, String key) { 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); } } /** * 减少值 * */ public <T> Long decr(KeyPrefix prefix, String key) { Jedis jedis = null; try { jedis = jedisPool.getResource(); //生成真正的key String realKey = prefix.getPrefix() + 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(); } } }