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jedis-JAVA操作Redis 

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                <h2 id="java连接redis客户端"><strong>Java连接Redis客户端</strong></h2>

jedis对 string 、set、sortset、list、hash 的所有常规操作。
更多精彩请阅读 东陆之滇的 csdn 博客：http://blog.csdn.net/zixiao217
我们使用 maven 工程测试开发，首先引入 jedis.jar：

 <dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.8.0</version>
    <type>jar</type>
    <scope>compile</scope>
</dependency>

若对 Redis 命令还没有一点概念，请阅读笔者前面的文章。这里直接上代码，简单粗暴：

package org.byron4j.redis_case;

import java.text.SimpleDateFormat;
import java.util.Date;


import redis.clients.jedis.Jedis;


/**


    

  • Hello world!
    • 

  • 



*/
public class App
{
public static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH🇲🇲ss");
public static void main(String[] args ) throws Throwable
{
Jedis jedis = new Jedis("localhost");


    <span class="hljs-comment">/**
     * 
     */</span>
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> + <span class="hljs-string">"清空当前数据库实例全部键："</span> + jedis.flushDB());

    <span class="hljs-comment">/**
     * 对字符串类型操作
     */</span>
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"字符串类型set的返回："</span> + jedis.set(<span class="hljs-string">"foo"</span>, <span class="hljs-string">"bar"</span>));
    <span class="hljs-type">String</span> <span class="hljs-variable">value</span> <span class="hljs-operator">=</span> jedis.get(<span class="hljs-string">"foo"</span>);
    System.out.println( sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"使用get获取字符串键值："</span> + value);

    <span class="hljs-comment">/**
     * 对列表类型操作
     *      -- 将val1放到对头，再将val2放到对头，这时候val1到了队尾，rpop获取队尾元素得到val1.
     */</span>
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"lpush往列表头插入一个元素："</span> + jedis.lpush(<span class="hljs-string">"code_list1"</span>, <span class="hljs-string">"val1"</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"lpush往列表头插入一个元素："</span> + jedis.lpush(<span class="hljs-string">"code_list1"</span>, <span class="hljs-string">"val2"</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"lpush往列表尾取出一个元素："</span> + jedis.rpop(<span class="hljs-string">"code_list1"</span>));


    <span class="hljs-comment">/**
     * 设置超时
     */</span>
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"lpush往列表头插入一个元素："</span> + jedis.lpush(<span class="hljs-string">"ttl_list1"</span>, <span class="hljs-string">"val1"</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"设置超时时间10秒："</span> + jedis.expire(<span class="hljs-string">"ttl_list1"</span>, <span class="hljs-number">10</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"停顿3秒后..."</span>);
    Thread.sleep(<span class="hljs-number">3000</span>);
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"查看剩余存活时间："</span> + jedis.ttl(<span class="hljs-string">"ttl_list1"</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"查看数据库中的键:"</span> + jedis.keys(<span class="hljs-string">"*"</span>));
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"再停顿7秒..."</span>);
    Thread.sleep(<span class="hljs-number">7000</span>);
    System.out.println(sdf.format(<span class="hljs-keyword">new</span> <span class="hljs-title class_">Date</span>()) + <span class="hljs-string">" - "</span> +<span class="hljs-string">"查看数据库中的键:"</span> + jedis.keys(<span class="hljs-string">"*"</span>));


}



}

运行结果，一目了然：

2016-10-08 17:46:00 - 清空当前数据库实例全部键：OK
2016-10-08 17:46:00 - 字符串类型set的返回：OK
2016-10-08 17:46:00 - 使用get获取字符串键值：bar
2016-10-08 17:46:00 - lpush往列表头插入一个元素：1
2016-10-08 17:46:00 - lpush往列表头插入一个元素：2
2016-10-08 17:46:00 - lpush往列表尾取出一个元素：val1
2016-10-08 17:46:00 - lpush往列表头插入一个元素：1
2016-10-08 17:46:00 - 设置超时时间10秒：1
2016-10-08 17:46:00 - 停顿3秒后...
2016-10-08 17:46:03 - 查看剩余存活时间：7
2016-10-08 17:46:03 - 查看数据库中的键:[code_list1, ttl_list1, foo]
2016-10-08 17:46:03 - 再停顿7秒...
2016-10-08 17:46:10 - 查看数据库中的键:[code_list1, foo]

记得自己动手实验，现在你已经入门了，对于 java 中的 redis 编程。