redis存放对象

一般会在Redis中存放键值对，那么如何存放一个对象呢？

  1 import redis.clients.RedisClinet;
  2 import redis.clients.SerializeUtil;
  3 import redis.clients.jedis.Jedis;
  4 
  5 public class Test {
  6 
  7       /**
  8       * Administrator
  9       * @param args
 10       */
 11       public static void main(String[] args) {
 12            
 13             // 操作单独的文本串
 14            Jedis redis= new Jedis( "10.2.31.38", 6379);
 15            
 16            redis.set( "key", "value");
 17            System. out.println(redis.get( "key"));
 18            System. out.println(redis.del( "key"));
 19            
 20             // 操作实体类对象
 21            Goods good= new Goods();  // 这个Goods实体我就不写了啊
 22            good.setName( "洗衣机" );
 23            good.setNum(400);
 24            good.setPrice(19l);
 25            redis.set( "good".getBytes(), SerializeUtil. serialize(good));
 26             byte[] value = redis.get( "good".getBytes());
 27            Object object = SerializeUtil. unserialize(value);           
 28             if(object!= null){
 29                 Goods goods=(Goods) object;
 30                 System. out.println(goods.getName());
 31                 System. out.println(goods.getNum());
 32                 System. out.println(goods.getPrice());
 33            }
 34            System. out.println(redis.del( "good".getBytes()));
 35            
 36             // 操作实体类对象2（实际上和上面是一样的）
 37            String key= "goods-key";
 38            Goods g= new Goods();
 39            g.setName( "电风扇--d" );
 40            g.setNum(200);
 41            String temp=RedisClinet. getInstance().set(g, key);
 42            System. out.println(temp);
 43            
 44            Object o=RedisClinet. getInstance().get(key);
 45             if(o!= null)
 46            {
 47                 Goods g1=(Goods)o;
 48                 System. out.println(g1.getName());
 49                 System. out.println(g1.getNum());
 50            }
 51           System. out.println(RedisClinet. getInstance().del(key));
 52            
 53      }
 54 }
 55 
 56 
 57 2 RedisClinet 客户端类
 58 package redis.clients;
 59 import redis.clients.jedis.Jedis;
 60 /**
 61  *
 62  * @author ajun
 63  *
 64  */
 65 public class RedisClinet {
 66       private static final String ip= "10.2.31.38";
 67       private static final int port=6379;
 68       protected static RedisClinet redis = new RedisClinet ();
 69       protected static Jedis jedis = new Jedis( ip, port);;
 70       static {
 71            
 72      }
 73     protected RedisClinet(){
 74        System. out.println( " init Redis ");
 75     }
 76     public static RedisClinet getInstance()
 77     {
 78         return redis;
 79     }
 80    
 81     /**set Object*/
 82       public String set(Object object,String key)
 83      {
 84             return jedis.set(key.getBytes(), SerializeUtil.serialize(object));
 85      }
 86      
 87       /**get Object*/
 88       public Object get(String key)
 89      {
 90             byte[] value = jedis.get(key.getBytes());
 91             return SerializeUtil. unserialize(value);
 92      }
 93      
 94       /**delete a key**/
 95       public boolean del(String key)
 96      {
 97             return jedis.del(key.getBytes())>0;
 98      }
 99 
100 }
101 
102 
103 3 序列化工具类
104 
105 /**
106  *
107  */
108 package redis.clients;
109 
110 import java.io.ByteArrayInputStream;
111 import java.io.ByteArrayOutputStream;
112 import java.io.ObjectInputStream;
113 import java.io.ObjectOutputStream;
114 
115 /**
116  * @author Administrator
117  *
118  */
119 public class SerializeUtil {
120       public static byte[] serialize(Object object) {
121            ObjectOutputStream oos = null;
122             ByteArrayOutputStream baos = null;
123             try {
124                  // 序列化
125                 baos = new ByteArrayOutputStream();
126                 oos = new ObjectOutputStream(baos);
127                 oos.writeObject(object);
128                  byte[] bytes = baos.toByteArray();
129                  return bytes;
130            } catch (Exception e) {
131 
132            }
133             return null;
134      }
135 
136       public static Object unserialize( byte[] bytes) {
137            ByteArrayInputStream bais = null;
138             try {
139                  // 反序列化
140                 bais = new ByteArrayInputStream(bytes);
141                 ObjectInputStream ois = new ObjectInputStream(bais);
142                  return ois.readObject();
143            } catch (Exception e) {
144 
145            }
146             return null;
147      }
148 }

 

posted @ 2018-04-03 16:08  radiant13  阅读(2342)  评论(0)  编辑  收藏  举报