redis 入門學習-- java 對象存入redis的2種方式

1、將對象序列化成字節數組，存入String中

/**
     * 將對象緩存到redis的string結構數據中
     * @throws Exception 
     *
     */
    @Test
    public void testObjectCache() throws Exception{
        
            ProductInfo p = new ProductInfo();
            
            p.setName("中華牙膏");
            p.setDescription("美白防蛀");
            p.setCatelog("日用品");
            p.setPrice(10.8);

            //將對象序列化成字節數組
            ByteArrayOutputStream ba = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(ba);
            
            //用對象序列化流來將p對象序列化，然后把序列化之后的二進制數據寫到ba流中
            oos.writeObject(p);
            
            //將ba流轉成byte數組
            byte[] pBytes = ba.toByteArray();
            
            //將對象序列化之后的byte數組存到redis的string結構數據中
            jedis.set("product:01".getBytes(), pBytes);
        
            //根據key從redis中取出對象的byte數據
            byte[] pBytesResp = jedis.get("product:01".getBytes());
            
            //將byte數據反序列出對象
            ByteArrayInputStream bi = new ByteArrayInputStream(pBytesResp);
            
            ObjectInputStream oi = new ObjectInputStream(bi);
            
            //從對象讀取流中讀取出p對象
            ProductInfo pResp = (ProductInfo) oi.readObject();
            
            System.out.println(pResp);
    }

 

2、將對象轉成json字符串緩存到redis的string結構數據中

/**
* 將對象轉成json字符串緩存到redis的string結構數據中
*/
@Test
public void testObjectToJsonCache(){
        
        
        ProductInfo p = new ProductInfo();
        
        p.setName("兩面針");
        p.setDescription("防蛀專用");
        p.setCatelog("日用品");
        p.setPrice(10.9);

        //利用gson將對象轉成json串
        Gson gson = new Gson();
        String pJson = gson.toJson(p);
        
        //將json串存入redis
        jedis.set("prodcut:02", pJson);
        
        
        //從redis中取出對象的json串
        String pJsonResp = jedis.get("prodcut:02");
        
        //將返回的json解析成對象
        ProductInfo pResponse = gson.fromJson(pJsonResp, ProductInfo.class);
        
        //顯示對象的屬性
        System.out.println(pResponse);
    }

3、ProductInfo對象代碼

import java.io.Serializable;

public class ProductInfo implements Serializable{


    private static final long serialVersionUID = 3002512957989050750L;
    private String name;
    private String description;
    private double price;
    private String catelog;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    public String getCatelog() {
        return catelog;
    }
    public void setCatelog(String catelog) {
        this.catelog = catelog;
    }
    
    @Override
    public String toString() {
         
        return name+" "+description + " "+ catelog+ " " + price;
    }
}