redis在项目中的使用（单机版、集群版）

时间：2023-03-08 18:09:30

1.下载jar包：jedis-2.6.2.jar

2.代码：

JedisDao.java：

package com.test.www.dao;

public interface JedisDao {

    //抽取jedis访问redis服务器常用方法

    //String

    public String set(String key,String value);

    public String get(String key);

    //自增

    public Long incr(String key);

    //自减

    public Long decr(String key);

    //过期时间

    public Long expire(String key, int seconds);

    //查询过期剩余时间

    public Long ttl(String key);

    //HASH

    public Long hset(String key, String field, String value);

    public String hget(String key, String field);

    //删除

    public Long hdel(String key, String field);

    // public String setObject(String key, Object value);Object改成泛型T

    public <T> String setObject(String key, T value);

    public Object getObject(String key);

}

SingleJedisDaoImpl.java：（单机版）

/*package com.test.www.dao.impl;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Repository;

import redis.clients.jedis.Jedis;

import redis.clients.jedis.JedisPool;

import com.test.www.dao.JedisDao;

import com.test.www.utils.SerializeUtil;

@Repository

public class SingleJedisDaoImpl implements JedisDao {

    //注入单机版jedis连接池对象

    @Autowired

    private JedisPool jedisPool;

    @Override

    public String set(String key, String value) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        String set = jedis.set(key, value);

        return set;

    }

    @Override

    public String get(String key) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        String value = jedis.get(key);

        return value;

    }

    @Override

    public Long incr(String key) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long incr = jedis.incr(key);

        return incr;

    }

    @Override

    public Long decr(String key) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long decr = jedis.decr(key);

        return decr;

    }

    @Override

    public Long expire(String key, int seconds) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long expire = jedis.expire(key, seconds);

        return expire;

    }

    @Override

    public Long ttl(String key) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long ttl = jedis.ttl(key);

        return ttl;

    }

    @Override

    public Long hset(String key, String field, String value) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long hset = jedis.hset(key, field, value);

        return hset;

    }

    @Override

    public String hget(String key, String field) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        String hget = jedis.hget(key, field);

        return hget;

    }

    @Override

    public Long hdel(String key, String field) {

        // TODO Auto-generated method stub

        Jedis jedis = jedisPool.getResource();

        Long hdel = jedis.hdel(key, field);

        return hdel;

    }

    @Override

    public <T> String setObject(String key, T value) {

        Jedis jedis = jedisPool.getResource();

        String set = jedis.set(SerializeUtil.serialize(key), SerializeUtil.serialize(value));

        return set;

    }

    @Override

    public Object getObject(String key) {

        Jedis jedis = jedisPool.getResource();

        byte[] value = jedis.get(SerializeUtil.serialize(key));

        return SerializeUtil.unserialize(value);

    }

}

*/

ClusterJedisDaoImpl.java（集群）（集群的搭建详见redis集群搭建，地址：https://www.cnblogs.com/super-chao/p/9329018.html）

package com.test.www.dao.impl;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Repository;

import redis.clients.jedis.Jedis;

import redis.clients.jedis.JedisCluster;

import redis.clients.jedis.JedisPool;

import com.test.www.dao.JedisDao;

import com.test.www.utils.SerializeUtil;

/**

 * redis集群

 * @className ClusterJedisDaoImpl

 * @author liuyachao

 * @date 2018-7-18

 */

@Repository

public class ClusterJedisDaoImpl implements JedisDao {

    //注解集群对象

    @Autowired

    private JedisCluster jc;

    @Override

    public String set(String key, String value) {

        // TODO Auto-generated method stub

        String set = jc.set(key, value);

        return set;

    }

    @Override

    public String get(String key) {

        // TODO Auto-generated method stub

        String string = jc.get(key);

        System.out.println(jc.getClusterNodes());

        //System.out.println(jc.getDB());

        //System.out.println(jc.info());

        return string;

    }

    @Override

    public Long incr(String key) {

        // TODO Auto-generated method stub

        Long incr = jc.incr(key);

        return incr;

    }

    @Override

    public Long decr(String key) {

        // TODO Auto-generated method stub

        Long decr = jc.decr(key);

        return decr;

    }

    @Override

    public Long expire(String key, int seconds) {

        // TODO Auto-generated method stub

        Long expire = jc.expire(key, seconds);

        return expire;

    }

    @Override

    public Long ttl(String key) {

        // TODO Auto-generated method stub

        Long ttl = jc.ttl(key);

        return ttl;

    }

    @Override

    public Long hset(String key, String field, String value) {

        // TODO Auto-generated method stub

        Long hset = jc.hset(key, field, value);

        return hset;

    }

    @Override

    public String hget(String key, String field) {

        // TODO Auto-generated method stub

        String value = jc.hget(key, field);

        return value;

    }

    @Override

    public Long hdel(String key, String field) {

        // TODO Auto-generated method stub

        Long hdel = jc.hdel(key, field);

        return hdel;

    }

    @Override

    public <T> String setObject(String key, T value) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    public Object getObject(String key) {

        // TODO Auto-generated method stub

        return null;

    }

}

PageController.java：

package com.test.www.web.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

@RequestMapping("/page")

public class PageController {

    /**

     * 跳转到大区欢迎页

     * @param map

     * @return

     */

    @RequestMapping("/toArea")

    public String toArea(

            ModelMap map

            ){

        return "area";

    }

    @RequestMapping("/redis")

    public String redis(

            ModelMap map

            ){

        return "redis";

    }

}

配置：
applicationContext-redis.xml：

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"

       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"

       xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc"

       xmlns:cache="http://www.springframework.org/schema/cache"

       xmlns:task="http://www.springframework.org/schema/task"

       xsi:schemaLocation="

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context.xsd

    http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans.xsd

    http://www.springframework.org/schema/tx

    http://www.springframework.org/schema/tx/spring-tx.xsd

    http://www.springframework.org/schema/jdbc

    http://www.springframework.org/schema/jdbc/spring-jdbc.xsd

    http://www.springframework.org/schema/cache

    http://www.springframework.org/schema/cache/spring-cache.xsd

    http://www.springframework.org/schema/aop

    http://www.springframework.org/schema/aop/spring-aop.xsd

    http://www.springframework.org/schema/util

    http://www.springframework.org/schema/util/spring-util.xsd

    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd">

    <!-- 读取配置文件信息 -->

    <!-- <context:property-placeholder location="classpath:redis.properties" file-encoding="UTF-8" ignore-unresolvable="true"/> -->

    <!-- Jedis 连接池配置 -->

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">

        <property name="maxTotal" value="${redis.pool.maxTotal}"/>

        <property name="maxIdle" value="${redis.pool.maxIdle}"/>

        <property name="maxWaitMillis" value="${redis.pool.maxWaitMillis}"/>

        <property name="testOnBorrow" value="${redis.pool.testOnBorrow}"/>

    </bean>

    <!-- 单机版 -->

    <!-- <bean id="jedisPool" class="redis.clients.jedis.JedisPool">

        <constructor-arg ref="jedisPoolConfig"/>

        <constructor-arg value="${jedis.host}" type="java.lang.String"/>

        <constructor-arg type="int" value="${jedis.port}"/>

    </bean> -->

    <!-- 集群 -->

    <bean class="redis.clients.jedis.JedisCluster">

        <constructor-arg name="nodes">

            <set>

                <!-- <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="7001"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="7002"></constructor-arg>

                </bean> -->

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6384"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6383"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6382"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6381"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6380"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="127.0.0.1"></constructor-arg>

                    <constructor-arg name="port" value="6379"></constructor-arg>

                </bean>

            </set>

        </constructor-arg>

        <constructor-arg name="poolConfig" ref="jedisPoolConfig"></constructor-arg>

    </bean>

</beans>

redis.properties：

# 控制一个pool可分配多少个jedis实例

redis.pool.maxTotal=1000

# 控制一个pool最多有多少个状态为idle(空闲)的jedis实例

redis.pool.maxIdle=200

# 表示当borrow一个jedis实例时，最大的等待时间，如果超过等待时间，则直接抛出JedisConnectionException

redis.pool.maxWaitMillis=2000

#在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的

redis.pool.testOnBorrow=true

# redis 单机

# 单机 host

jedis.host=127.0.0.1

# 单机 port

jedis.port=6379

页面：
redis.jsp：

<!DOCTYPE html>

<%@ page language="java" contentType="text/html; charset=UTF-8"%>

<%

    String ctxPath = request.getContextPath();

    request.setAttribute("ctxpath", ctxPath);//项目根路径

%>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>首页</title>

<script src="${ctxpath}/js/jquery-1.11.3.min.js"></script>

<script type="text/javascript">

    $(function() {

    });

</script>

</head>

<body>

    <div id="area"></div>

    redis中缓存的用户名：${username }

    <%-- <a href="${ctxpath}/redis/visitHistory.html">redis存数据</a> --%>

    <form action="${ctxpath}/redis/visitHistory.html" method="post">

        username:<input type="text" name="username" />

        <br>

        <input type="submit" value="redis存数据">

    </form>

    <a href="${ctxpath}/redis/getHistory.html">redis获取数据</a>

</body>

</html>

效果图：
redis在项目中的使用（单机版、集群版）

单机、集群可相互切换测试，如果使用单机的话，把单机的注释放开，集群注释掉。

单机实现了redis存放各种类型数据（字节流处理）set(String,Object)。

集群版存放为set(String,String)，可转换为json串存放数据，取出数据再解析json串。

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