redis简单配置使用

一：浩语

任何事情都是要靠努力和用心，包括爱情。

二：配置

2.1:最近要做相关token的处理,所以就要做缓存，本身已经有了一个缓存，但是这个缓存是用来处理权限的,所以经常性的面临着清理然后重新加载的问题,所以我还是决定自己重新搭建一个redis。
2.2:maven配置

    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-redis</artifactId>
        <version>1.7.6.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-redis</artifactId>
        <version>1.7.6.RELEASE</version>
    </dependency>

2.3：结合spring配置

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"  
    xmlns:aop="http://www.springframework.org/schema/aop"  
    xsi:schemaLocation="  
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">  
  
    <context:property-placeholder location="classpath:config/redis.properties" />  
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">  
        <property name="maxIdle" value="100" />  
        <property name="maxTotal" value="100" />  
        <property name="testOnBorrow" value="true" />  
    </bean>  
      
    <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"  
        p:host-name="127.0.0.1" p:port="6379"  p:pool-config-ref="poolConfig"/>  
      
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">  
        <property name="connectionFactory"   ref="connectionFactory" />  
    </bean>         
</beans>  

我使用的是比较新的版本,所以很多属性在源码中都已经没有了，testOnBorrow是boolean类型的。

pool_code.png

三：遇到的问题

(1)测试代码：

public static void main(String args[]){
          JedisPoolConfig config = new JedisPoolConfig();
          JedisPool pool;
          Jedis jedis = null;
          pool = new JedisPool(config, "10.10.130.140", 6379);
          boolean success = true;
          try {
            jedis = pool.getResource();
          } catch (JedisConnectionException e) {
           success= false;
           if (jedis != null)
            pool.returnBrokenResource(jedis);

          } finally {
           if (success)
            pool.returnResource(jedis);
          }
          System.out.println(jedis);
          System.out.println(jedis.get("counter"));
    }

public class RedisServer {
     @Resource(name = "redisTemplate")
     RedisTemplate redisTemplate;
        public String getCacheValue(String cacheKey){
            String cacheValue=(String)redisTemplate.opsForValue().get(cacheKey);
            return cacheValue;
        }
}

(2):问题一

Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
    at redis.clients.util.Pool.getResource(Pool.java:50)
    at redis.clients.jedis.JedisPool.getResource(JedisPool.java:88)
    at com.mangocity.mbr.controller.TestController.main(TestController.java:54)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused: connect
    at redis.clients.jedis.Connection.connect(Connection.java:148)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:75)
    at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1572)
    at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:69)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:819)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:429)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:360)
    at redis.clients.util.Pool.getResource(Pool.java:48)
    ... 2 more

这个问题是因为redis.conf中默认的是bind 127.0.0.1所以需要将这段注释
protected-mode no
这里最好把这个给关了,如果是yes的话，只能进行本地访问。如果设置了密码和bind这个可以开启，如果没有设置，这个属性可以设置为no即可。
daemonize yes表示后台运行

(3)：问题二
下面这两个问题都是因为同一个原因造成

redis.clients.jedis.Jedis@334ecfe8
Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in 
protected mode because protected mode is enabled, no bind address was specified, no authentication 
password is requested to clients. In this mode connections are only accepted from the loopback interface. If 
you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just 
disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback 
interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is 
not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent.
 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting 
the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for 
testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication 
password. NOTE: You only need to do one of the above things in order for the server to start accepting 
connections from the outside.
    at redis.clients.jedis.Protocol.processError(Protocol.java:113)
    at redis.clients.jedis.Protocol.process(Protocol.java:138)
    at redis.clients.jedis.Protocol.read(Protocol.java:192)
    at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:282)
    at redis.clients.jedis.Connection.getBinaryBulkReply(Connection.java:201)
    at redis.clients.jedis.Connection.getBulkReply(Connection.java:190)
    at redis.clients.jedis.Jedis.get(Jedis.java:93)
    at com.mangocity.mbr.controller.TestController.main(TestController.java:55)

nested exception is org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis 
connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a 
resource from the pool] with root cause
java.util.NoSuchElementException: Unable to validate object

解决办法：

Paste_Image.png
将图片中的protected-mode no就行
(4):测试结果
redis中设置了数据counter值为1
redis_value.png

java代码查询结果

java_value_Image.png

四：redis配置文件修改方式
进入redis的客户端形式，我们可以使用config get * 查看所有的属性

Paste_Image.png

可以获取某个属性的数据

Paste_Image.png

同时也可以设置某个属性

Paste_Image.png

五：浩语

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                            __  _  ____ __|  |__ _____    ___
                            \ \/ \/ /  |  \  |  \\__  \  /  _ \   
                             \     /|  |  /   Y  \/ __ \(  <_> )
                              \/\_/ |____/|___|  (____  /\____/ 
                                                    \/     \/          
                                 任何事情都是要靠努力和用心。