使用java操作Redis

插曲：

redis连接超时--Exception in thread "main" 

Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: Failed connecting to host XXXX:6379
    at redis.clients.jedis.Connection.connect(Connection.java:204)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:100)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:125)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:120)
    at redis.clients.jedis.BinaryClient.multi(BinaryClient.java:523)
    at redis.clients.jedis.BinaryJedis.multi(BinaryJedis.java:1877)
    at com.redis.TestTX.main(TestTX.java:19)
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at redis.clients.jedis.Connection.connect(Connection.java:181)

 解决办法：

1.修改redis配置文件

注释掉bind，protected-mode为no

2.查看远程服务器的防火墙状态

systemctl status firewalld

3.按步骤执行以下命令

//查看防火墙状态
firewall-cmd --state

//开放6379端口
firewall-cmd --permanent --add-port=6379/tcp
//查看端口，执行
firewall-cmd --permanent --query-port=6379/tcp

firewall-cmd --permanent --list-ports
//重启防火墙
firewall-cmd --reload

4.重启redis

redis-cli -p 6379 shutdown

redis-server /opt/redis/back_config/redis.conf

Jedis

1.导入对应依赖

<!--导入jedis的包-->
<dependencies>
    <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>3.2.0</version>
    </dependency>
    <!--fastjson-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.62</version>
    </dependency>
</dependencies>

2.编码测试

 常用的API ：String， List， Set ，Hash， Zse

 

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