redis 的测试连接和String API练习

柔光的暖阳◎ 2022-12-07 15:03 42阅读 0赞

[http://www.redis.cn/][http_www.redis.cn]  
redis的安装参照[博客园][Link 1]  
添加依赖

<dependency>
                <groupId>redis.clients</groupId>
                <artifactId>jedis</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-redis</artifactId>
            </dependency>

package com.jt.test;
    
    import org.junit.jupiter.api.Test;
    import redis.clients.jedis.Jedis;
    import redis.clients.jedis.params.Params;
    import redis.clients.jedis.params.SetParams;
    
    public class TestRedis { 
    	@Test
    	public void Test01 (){ 
    		Jedis jedis = new Jedis("192.168.126.129",6379);
    		jedis.auth("123456");
    		jedis.set("firt", "123456");
    		System.out.println(jedis.get("firt"));
    	}
    	@Test
    	public void Test02 (){ 
    		Jedis jedis = new Jedis("192.168.126.129",6379);
    		jedis.auth("123456");
    		if(jedis.exists("firt")){ 
    			System.out.println("已存在");
    		}else { 
    			jedis.set("firt", "nihao");
    		}
    		
    		
    		System.out.println(jedis.get("firt"));
    	}
    	@Test
    	public void Test03 (){ 
    		Jedis jedis = new Jedis("192.168.126.129",6379);
    		jedis.auth("123456");
    		jedis.flushAll();
    		jedis.setex("firt", 10, "清空redis");
    		
    		
    		System.out.println(jedis.get("firt"));
    	}
    	
    	/**
    	 *
    	 private static final String XX = "xx"; 存在时复制
    	 private static final String NX = "nx";  不存在时复制
    	 private static final String PX = "px";
    	 private static final String EX = "ex";
    	 */
    	@Test
    	public void Test04 (){ 
    		Jedis jedis = new Jedis("192.168.126.129",6379);
    		jedis.auth("123456");
    		SetParams params =new SetParams() ;
    		params.xx().ex(10);
    		
    		jedis.set("firs", "uuuu", params);
    		
    		System.out.println(jedis.get("firs"));
    	}
    	
    	
    }

# String类型 #

<table> 
 <thead> 
  <tr> 
   <th>命令</th> 
   <th>说明</th> 
   <th>案例</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>set</td> 
   <td>添加key-value</td> 
   <td>set username admin</td> 
  </tr> 
  <tr> 
   <td>get</td> 
   <td>根据key获取数据</td> 
   <td>get username</td> 
  </tr> 
  <tr> 
   <td>strlen</td> 
   <td>根据key获取值的长度</td> 
   <td>strlen key</td> 
  </tr> 
  <tr> 
   <td>exists</td> 
   <td>判断key是否存在</td> 
   <td>exists name 返回1存在 0不存在</td> 
  </tr> 
  <tr> 
   <td>del</td> 
   <td>删除redis中的key</td> 
   <td>del key</td> 
  </tr> 
  <tr> 
   <td>Keys</td> 
   <td>用于查询符合条件的key</td> 
   <td>keys * 查询redis中全部的key keys n?me 使用占位符获取数据keys nam*获取nam开头的数据</td> 
  </tr> 
  <tr> 
   <td>mset</td> 
   <td>赋值多个key-value</td> 
   <td>mset key1 value1 key2 value2 key3 value3</td> 
  </tr> 
  <tr> 
   <td>mget</td> 
   <td>获取多个key的值</td> 
   <td>mget key1 key2</td> 
  </tr> 
  <tr> 
   <td>append</td> 
   <td>对某个key的值进行追加</td> 
   <td>append key value</td> 
  </tr> 
  <tr> 
   <td>type</td> 
   <td>检查某个key的类型</td> 
   <td>type key</td> 
  </tr> 
  <tr> 
   <td>select</td> 
   <td>切换redis数据库</td> 
   <td>select 0-15 redis中共有16个数据库</td> 
  </tr> 
  <tr> 
   <td>flushdb</td> 
   <td>清空单个数据库</td> 
   <td>flushdb</td> 
  </tr> 
  <tr> 
   <td>flushall</td> 
   <td>清空全部数据库</td> 
   <td>flushall</td> 
  </tr> 
  <tr> 
   <td>incr</td> 
   <td>自动加1</td> 
   <td>incr key</td> 
  </tr> 
  <tr> 
   <td>decr</td> 
   <td>自动减1</td> 
   <td>decr key</td> 
  </tr> 
  <tr> 
   <td>incrby</td> 
   <td>指定数值添加</td> 
   <td>incrby 10</td> 
  </tr> 
  <tr> 
   <td>decrby</td> 
   <td>指定数值减</td> 
   <td>decrby 10</td> 
  </tr> 
  <tr> 
   <td>expire</td> 
   <td>指定key的生效时间单位秒</td> 
   <td>expire key 20 key20秒后失效</td> 
  </tr> 
  <tr> 
   <td>pexpire</td> 
   <td>指定key的失效时间 单位毫秒</td> 
   <td>pexpire key 2000key 2000毫秒后失效</td> 
  </tr> 
  <tr> 
   <td>ttl</td> 
   <td>检查key的剩余存活时间 ttl key</td> 
   <td>-2数据不存在 -1该数据永不超时</td> 
  </tr> 
 </tbody> 
</table>

[http_www.redis.cn]: http://www.redis.cn/
[Link 1]: https://www.cnblogs.com/syrgdm/p/13677578.html