Jedis简介
实际开发中，我们需要用Redis的连接工具连接Redis然后操作Redis。
redis都提供了对应的客户端 https://redis.io/clients
官方推荐的是Jedis 托管地址：https://github.com/xetorthio/jedis
Jedis连接 HelloWorld实现
pom里加下jedis依赖
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>/**
* 测试类
* @author user
*/
public class JedisTest {
public static void main(String[] args) {
Jedis jedis=new Jedis("192.168.0.7",6379); // 创建客户端 设置IP和端口
jedis.set("name", "hello word"); // 设置值
String value=jedis.get("name"); // 获取值
System.out.println(value);
jedis.close(); // 释放连接资源
}
}
运行 报错了 连接超时.
我们配置下防火墙 开一个6379端口权限
继续运行 还是报错 连接超时 错误；
我们配置下 redis配置文件 redis.conf
这里绑定了本机，我们把这个备注掉； # bind 127.0.0.1
配置完后
[root@localhost redis]# ./bin/redis-cli shutdown
[root@localhost redis]# ./bin/redis-server ./redis.conf
要重启下redis服务；
继续运行 又报错了
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:127)
at redis.clients.jedis.Protocol.process(Protocol.java:161)
at redis.clients.jedis.Protocol.read(Protocol.java:215)
at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340)
at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239)
at redis.clients.jedis.Jedis.set(Jedis.java:121)
at com.java1234.redis.JedisTest.main(JedisTest.java:14)
有两种方法 解决
第一种 直接去掉自我保护功能（不推荐）
[root@localhost redis]# vi /usr/local/redis/redis.conf
进入配置 找到 protected-mode yes 改成 no即可 编辑后 重启redis服务，然后运行 ，结果出来了
第二种 设置redis连接密码
进入客户端
[root@localhost redis]# ./bin/redis-cli
127.0.0.1:6379> config set requirepass 123456
设置密码 123456
127.0.0.1:6379> quit
[root@localhost redis]# ./bin/redis-cli
127.0.0.1:6379> auth 123456
OK
说明设置成功
这样就OK了
Jedis 连接池实例
/**
* 测试类
* @author user
*/
public class JedisTest {
public static void main(String[] args) {
JedisPoolConfig config=new JedisPoolConfig(); // 连接池的配置对象
config.setMaxTotal(100); // 设置最大连接数
config.setMaxIdle(10); // 设置最大空闲连接数
JedisPool jedisPool=new JedisPool(config,"192.168.0.7",6379);
Jedis jedis=null;
try{
jedis=jedisPool.getResource(); // 获取连接
jedis.auth("123456"); // 设置密码
jedis.set("name", "hello word"); // 设置值
String value=jedis.get("name"); // 获取值
System.out.println(value);
}catch(Exception e){
e.printStackTrace();
}finally{
if(jedis!=null){
jedis.close();
}
if(jedisPool!=null){
jedisPool.close();
}
}
}
}