Redis初识

知识库大约 4 分钟

Redis 官网

官网地址：http://redis.io/open in new window
官网地址（中文）：http://www.redis.cn/open in new window
下载地址： http://download.redis.io/releases/open in new window
Github 源码：https://github.com/antirez/redisopen in new window
源码（带注释）：https://github.com/huangz1990/redis-3.0-annotatedopen in new window
Redis 命令参考：http://doc.redisfans.com/open in new window
测试工具 redis-benchmark：https://redis.io/topics/benchmarksopen in new window

Windows 安装

下载地址：https://github.com/microsoftarchive/redis/releases/open in new window

CentOS 安装

# gcc环境
yum install -y wget gcc-c++
# 下载并解压缩Redis源码压缩包
wget http://download.redis.io/releases/redis-5.0.4.tar.gz
mkdir -p ~/tools/ && tar -zxf redis-5.0.4.tar.gz -C ~/tools/
cd ~/tools/redis-5.0.4  && make
# 安装Redis，需要通过PREFIX指定安装路径
cd ~/tools/redis-5.0.4  && make install PREFIX=/usr/local/redis
mkdir -p /usr/local/redis/etc/ && cp -r /root/tools/redis-5.0.4/redis.conf /usr/local/redis/etc/
# 修改配置文件 `vi /usr/local/redis/bin/redis.conf`
# 将daemonize由no改为yes
sed -i "s/daemonize no/daemonize yes/g" /usr/local/redis/etc/redis.conf
# 是否开启保护模式，由yes该为no
sed -i "s/protected-mode yes/protected-mode no/g" /usr/local/redis/etc/redis.conf

# 启动redis服务
/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
# 查看redis监听端口
netstat -tanp|grep redis
# 后端启动的关闭方式
/usr/local/redis/bin/redis-cli shutdown
# 查看redis 版本
/usr/local/redis/bin/redis-server --version
/usr/local/redis/bin/redis-server -v

其他命令说明

redis-server ：启动 redis 服务
redis-cli ：进入 redis 命令客户端
redis-benchmark：性能测试的工具
redis-check-aof ： aof 文件进行检查的工具
redis-check-dump ： rdb 文件进行检查的工具
redis-sentinel ：启动哨兵监控服务

Redis 客户端链接

# 默认端口：6379
redis-cli -h 127.0.0.1 -p 6379

Redis 开机自启

cat >> /usr/lib/systemd/system/redis.service << EOF
[Unit]
Description=Redis In-Memory Data Store
Documentation=https://redis.io/
After=network.target

[Service]
Type=forking
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
ExecStop=/usr/local/redis/bin/redis-cli shutdown
ExecReload=/bin/kill -s HUP \$MAINPID
Restart=always

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload && systemctl enable redis && systemctl start redis && systemctl status redis

Java 客户端 Jedis

github 地址：https://github.com/xetorthio/jedisopen in new window

添加依赖

<dependencies>
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.0.7.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.0.7.RELEASE</version>
    </dependency>
    <!-- 单元测试Junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
</dependencies>
<build>
    <plugins> <!-- 配置Maven的JDK编译级别 -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.2</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <encoding>UTF-8</encoding>
            </configuration>
        </plugin>
    </plugins>
</build>

单实例连接

@Test
public void testJedis() {
    //创建一个Jedis的连接
    Jedis jedis = new Jedis("127.0.0.1", 6379);
    //执行redis命令
    jedis.set("mytest", "hello world, this is jedis client!");
    //从redis中取值
    String result = jedis.get("mytest");
    //打印结果
    System.out.println(result);
    //关闭连接
    jedis.close();
}

连接池连接

@Test
public void testJedisPool() {
    //创建一连接池对象
    JedisPool jedisPool = new JedisPool("127.0.0.1", 6379);
    //从连接池中获得连接
    Jedis jedis = jedisPool.getResource();
    String result = jedis.get("mytest") ;
    System.out.println(result);
    //关闭连接
    jedis.close();
    //关闭连接池
    jedisPool.close();
}

连接 redis 集群

创建 JedisCluster 类连接 redis 集群。

@Test
public void testJedisCluster() throws Exception {
    //创建一连接,JedisCluster对象,在系统中是单例存在
    Set<HostAndPort> nodes = new HashSet<>();
    nodes.add(new HostAndPort("192.168.242.129", 7001));
    nodes.add(new HostAndPort("192.168.242.129", 7002));
    nodes.add(new HostAndPort("192.168.242.129", 7003));
    nodes.add(new HostAndPort("192.168.242.129", 7004));
    nodes.add(new HostAndPort("192.168.242.129", 7005));
    nodes.add(new HostAndPort("192.168.242.129", 7006));
    JedisCluster cluster = new JedisCluster(nodes);
    //执行JedisCluster对象中的方法,方法和redis一一对应。
    cluster.set("cluster-test", "my jedis cluster test");
    String result = cluster.get("cluster-test");
    System.out.println(result);
    //程序结束时需要关闭JedisCluster对象
    cluster.close();
}

Jedis 整合 spring

配置 spring 配置文件 applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!-- 连接池配置 -->
    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <!-- 最大连接数 -->
        <property name="maxTotal" value="30" />
        <!-- 最大空闲连接数 -->
        <property name="maxIdle" value="10" />
        <!-- 每次释放连接的最大数目 -->
        <property name="numTestsPerEvictionRun" value="1024" />
        <!-- 释放连接的扫描间隔(毫秒) -->
        <property name="timeBetweenEvictionRunsMillis" value="30000" />
        <!-- 连接最小空闲时间 -->
        <property name="minEvictableIdleTimeMillis" value="1800000" />
        <!-- 连接空闲多久后释放, 当空闲时间>该值 且 空闲连接>最大空闲连接数 时直接释放 -->
        <property name="softMinEvictableIdleTimeMillis" value="10000" />
        <!-- 获取连接时的最大等待毫秒数,小于零:阻塞不确定的时间,默认-1 -->
        <property name="maxWaitMillis" value="1500" />
        <!-- 在获取连接的时候检查有效性, 默认false -->
        <property name="testOnBorrow" value="true" />
        <!-- 在空闲时检查有效性, 默认false -->
        <property name="testWhileIdle" value="true" />
        <!-- 连接耗尽时是否阻塞, false报异常,ture阻塞直到超时, 默认true -->
        <property name="blockWhenExhausted" value="false" />
    </bean>

    <!-- redis单机 通过连接池 -->
    <bean id="jedisPool" class="redis.clients.jedis.JedisPool" destroy-method="close">
        <constructor-arg name="poolConfig" ref="jedisPoolConfig" />
        <constructor-arg name="host" value="192.168.10.135" />
        <constructor-arg name="port" value="6379" />
    </bean>

    <!-- redis集群 -->
    <bean id="jedisCluster" class="redis.clients.jedis.JedisCluster">
        <constructor-arg index="0">
            <set>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg index="0" value="192.168.10.135">
                    </constructor-arg>
                    <constructor-arg index="1" value="7001"></constructor-arg>
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg index="0" value="192.168.10.135">
                    </constructorarg>
                    <constructor-arg index="1" value="7002"></constructor-arg>
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg index="0" value="192.168.10.135">
                    </constructor-arg>
                    <constructor-arg index="1" value="7003"></constructor-arg>
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg index="0" value="192.168.10.135">
                    </constructor-arg>
                    <constructor-arg index="1" value="7004"></constructor-arg>
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg index="0" value="192.168.10.135">
                    </constructor-arg>
                    <constructor-arg index="1" value="7005"></constructor-arg>
                </bean>
            </set>
        </constructor-arg>
        <constructor-arg index="1" ref="jedisPoolConfig"></constructor-arg>
    </bean>
</beans>

测试代码

import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisCluster;
import redis.clients.jedis.JedisPool;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:application.xml")
public class TestJedis2 {
    @Autowired
    private JedisPool jedisPool;
    @Resource
    private JedisCluster cluster;
    @Test
    public void testJedisPool() {
        // 从连接池中获得连接
        Jedis jedis = jedisPool.getResource();
        String result = jedis.get("mytest");
        System.out.println(result);
        // 关闭连接
        jedis.close();
    }
    @Test
    public void testJedisCluster() throws Exception {
        // 执行JedisCluster对象中的方法,方法和redis一一对应。
        cluster.set("cluster-test", "my jedis cluster test");
        String result = cluster.get("cluster-test");
        System.out.println(result);
    }
}

Redis初识

# Redis 官网

# Windows 安装

# CentOS 安装

# Redis 客户端链接

# Redis 开机自启

# Java 客户端 Jedis

Redis 官网

Windows 安装

CentOS 安装

Redis 客户端链接

Redis 开机自启

Java 客户端 Jedis