redis java对象操作

发布时间：2020-12-11 23:55:23 所属栏目：MySql教程来源：网络整理

导读：使用Jedis客户端 1. java 对象，需序列化 Person /spanspan style="color: #0000ff;"gt;private/span span style="color: #0000ff;"gt;int/spanspan style="color: #000000;"gt; id;/spanspan style="color: #0000ff;"gt;private/spanspan style="color: #00

使用Jedis客户端

1. java 对象，需序列化

Person

</span><span style="color: #0000ff;"&gt;private</span> <span style="color: #0000ff;"&gt;int</span><span style="color: #000000;"&gt; id;

</span><span style="color: #0000ff;"&gt;private</span><span style="color: #000000;"&gt; String name;

</span><span style="color: #0000ff;"&gt;public</span> Person(<span style="color: #0000ff;"&gt;int</span><span style="color: #000000;"&gt; id,String name) {

    </span><span style="color: #0000ff;"&gt;this</span>.id =<span style="color: #000000;"&gt; id;

    </span><span style="color: #0000ff;"&gt;this</span>.name =<span style="color: #000000;"&gt; name;

}

</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;int</span><span style="color: #000000;"&gt; getId() {

    </span><span style="color: #0000ff;"&gt;return</span><span style="color: #000000;"&gt; id;

}

</span><span style="color: #0000ff;"&gt;public</span><span style="color: #000000;"&gt; String getName() {

    </span><span style="color: #0000ff;"&gt;return</span><span style="color: #000000;"&gt; name;

}</span></pre>

2. 序列化类

</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> <span style="color: #0000ff;"&gt;byte</span><span style="color: #000000;"&gt;[] serialize(Object object) {

    ObjectOutputStream oos </span>= <span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;;

    ByteArrayOutputStream baos </span>= <span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;;

    </span><span style="color: #0000ff;"&gt;try</span><span style="color: #000000;"&gt; {

        </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt; 序列化</span>

baos = new ByteArrayOutputStream();

        oos </span>= <span style="color: #0000ff;"&gt;new</span><span style="color: #000000;"&gt; ObjectOutputStream(baos);

        oos.writeObject(object);

        </span><span style="color: #0000ff;"&gt;byte</span>[] bytes =<span style="color: #000000;"&gt; baos.toByteArray();

        </span><span style="color: #0000ff;"&gt;return</span><span style="color: #000000;"&gt; bytes;

    } </span><span style="color: #0000ff;"&gt;catch</span><span style="color: #000000;"&gt; (Exception e) {

    }

    </span><span style="color: #0000ff;"&gt;return</span> <span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;;

}

</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> Object unserialize(<span style="color: #0000ff;"&gt;byte</span><span style="color: #000000;"&gt;[] bytes) {

    ByteArrayInputStream bais </span>= <span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;;

    </span><span style="color: #0000ff;"&gt;try</span><span style="color: #000000;"&gt; {

        </span><span style="color: #008000;"&gt;//</span><span style="color: #008000;"&gt; 反序列化</span>

bais = new ByteArrayInputStream(bytes);

        ObjectInputStream ois </span>= <span style="color: #0000ff;"&gt;new</span><span style="color: #000000;"&gt; ObjectInputStream(bais);

        </span><span style="color: #0000ff;"&gt;return</span><span style="color: #000000;"&gt; ois.readObject();

    } </span><span style="color: #0000ff;"&gt;catch</span><span style="color: #000000;"&gt; (Exception e) {

    }

    </span><span style="color: #0000ff;"&gt;return</span> <span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;;

}

}

3. 对象的操作测试

</span><span style="color: #008000;"&gt;/**</span><span style="color: #008000;"&gt;
 * </span><span style="color: #808080;"&gt;@param</span><span style="color: #008000;"&gt; args
 </span><span style="color: #008000;"&gt;*/</span>
<span style="color: #0000ff;"&gt;private</span> <span style="color: #0000ff;"&gt;static</span><span style="color: #000000;"&gt; Jedis jedis;
</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> <span style="color: #0000ff;"&gt;void</span> main(String[] args) <span style="color: #0000ff;"&gt;throws</span><span style="color: #000000;"&gt; InterruptedException {
    jedis</span>=<span style="color: #0000ff;"&gt;new</span> Jedis("127.0.0.1",6379<span style="color: #000000;"&gt;);
    setObject();
    Thread.sleep(</span>1000<span style="color: #000000;"&gt;);
    Person person </span>=getObject(100<span style="color: #000000;"&gt;);
    System.out.println(jedis.keys(</span>"*"<span style="color: #000000;"&gt;));
    </span><span style="color: #0000ff;"&gt;if</span>(person!=<span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;){
        System.out.println(person.getId());

        System.out.println(person.getName());    
    }

    delOject();
    System.out.println(jedis.keys(</span>"*"<span style="color: #000000;"&gt;));
    person </span>= getObject(100<span style="color: #000000;"&gt;);
    </span><span style="color: #0000ff;"&gt;if</span>(person!=<span style="color: #0000ff;"&gt;null</span><span style="color: #000000;"&gt;){
        System.out.println(person.getId());

        System.out.println(person.getName());    
    }</span><span style="color: #0000ff;"&gt;else</span><span style="color: #000000;"&gt;{
        System.out.println(</span>"key not exist"<span style="color: #000000;"&gt;);
    }

}
</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> Person getObject(<span style="color: #0000ff;"&gt;int</span><span style="color: #000000;"&gt; id) {

    </span><span style="color: #0000ff;"&gt;byte</span>[] person = jedis.get(("person:" +<span style="color: #000000;"&gt; id).getBytes());

    </span><span style="color: #0000ff;"&gt;return</span><span style="color: #000000;"&gt; (Person) SerializeUtil.unserialize(person);

    }

</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> <span style="color: #0000ff;"&gt;void</span><span style="color: #000000;"&gt; setObject() {

    Person person </span>= <span style="color: #0000ff;"&gt;new</span> Person(100,"alan"<span style="color: #000000;"&gt;);

    jedis.set(</span>"person:100"<span style="color: #000000;"&gt;.getBytes(),SerializeUtil.serialize(person));

    person </span>= <span style="color: #0000ff;"&gt;new</span> Person(101,"bruce"<span style="color: #000000;"&gt;);

    jedis.set(</span>"person:101"<span style="color: #000000;"&gt;.getBytes(),SerializeUtil.serialize(person));

    }

</span><span style="color: #0000ff;"&gt;public</span> <span style="color: #0000ff;"&gt;static</span> <span style="color: #0000ff;"&gt;void</span><span style="color: #000000;"&gt; delOject(){
    </span><span style="color: #0000ff;"&gt;boolean</span> isExist=jedis.exists("person:100"<span style="color: #000000;"&gt;.getBytes());
    </span><span style="color: #0000ff;"&gt;if</span><span style="color: #000000;"&gt;(isExist){
        System.out.println(</span>"delete the key"<span style="color: #000000;"&gt;);
        jedis.del(</span>"person:100"<span style="color: #000000;"&gt;.getBytes());
    }
}

}

（编辑：李大同）

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