Redis 单机版

Redis 支持单机版和集群,下面的步骤是单机版安装步骤

1. # yum install -y gcc-c++

1.1 由于是c语言编写,所以需要安装支持组件

2. 把压缩包上传到linux服务器上

2.1 示例位置: /usr/local/tmp/ 下

3. # cd /usr/local/tmp

   # tar zxvf redis-3.0.6.tar.gz

3.1 进入到/usr/local/tmp 下 运行解压命令

4. # make

4.1 进入到解压后的目录编译

5. # make install PREFIX=/usr/local/redis

5.1 安装,设置安装路径为/usr/local/redis 下

5.2 进入到src下安装

6. # ./redis-server

6.1 前端启动,安装后不能进行其他操作

6.2 Ctrl+c 退出

6.3 命令要在bin目录下执行

7. # cp /usr/local/tmp/redis-3.0.0/redis.conf /usr/local/redis/bin

7.1 把解压目录下配置文件拷贝到安装目录的bin下

8.# vi redis.conf

8.1 修改bin下redis.conf

8.2 把daemonize 由no修改成yes,守护进程启动（后台运行）

8.3   protected-mode no（关闭保护模式）

8.4注释这一段：# bind 127.0.0.1（只允许的IP访问）

9.# ps aux|grep redis

9.1 查看redis启动情况

10../redis-server redis.conf

10.1 启动redis服务

11.# ./redis-cli shutdown

10.1 如果希望关闭,运行上面命令,不关闭不运行即可

12.# ./redis-cli

11.1 进入到自带客户端工具,测试redis是否可用

12 # set name ‘smallming’

12.1 添加一个string ,key为name,value为smallming

13# get name

13.1 取出name中内容

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.shsxt</groupId>
  <artifactId>spring-data-redis</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>spring-data-redis</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <!-- spring  核心 jar -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!-- spring  测试 jar -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!-- spring jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!-- spring 事物  -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!-- aspectj 切面编程的 jar -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.9</version>
    </dependency>
    <!-- c3p0  连接池  -->
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
    </dependency>
    <!-- mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.1</version>
    </dependency>
    <!--  添加 mybatis 与 Spring 整合的核心包  -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
    <!-- mysql  驱动包  -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.39</version>
    </dependency>
    <!--  日志打印相关的 jar -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.2</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.2</version>
    </dependency>
    <!-- springmvc  依赖 jar -->
    <!-- spring web -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!-- spring mvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <!--  添加 json  依赖 jar 包  -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support </artifactId>
      <version>4.3.2.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.freemarker</groupId>
      <artifactId>freemarker</artifactId>
      <version>2.3.21</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.3.2</version>
    </dependency>
    <!-- Redis 依赖  -->
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>2.9.1</version>
    </dependency>
    <!-- spring data redis 依赖  -->
    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-redis</artifactId>
      <version>1.8.18.RELEASE</version>
    </dependency>
      <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.12</version>
      </dependency>
  </dependencies>
  <build>
    <!--  读取配置文件  -->
    <resources>
      <resource>
        <directory>src/main/resources</directory>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
          <include>**/*.properties</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
  </build>
</project>

UserServiceImpl加入缓存

package com.dbc.service.impl;

import com.dbc.dao.UserDao;
import com.dbc.entity.User;
import com.dbc.service.UserService;
import com.dbc.util.JsonUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

/**
 * @author DBC
 * @date create 2019/4/6 17:22
 */
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    @Autowired
    private UserDao userDao;

    @Override
    public User queryUserById(Integer userId) {
        //return doQueryUserById(userId);
        return doQueryUserById2Json(userId);
    }

    private User doQueryUserById(Integer userId) {
        //从redis查询
        User user = (User) redisTemplate.opsForValue().get("user:id_" + userId);
        if (null != user) {
            return user;
        }
        //没有从数据库查
        user = userDao.queryUserById(userId);
        if (null != user) {
            redisTemplate.opsForValue().set("user:id" + userId, user);
            return user;
        }
        return null;
    }

    public User doQueryUserById2Json(Integer userId) {
    //  先从 Redis 查询
        Object jsonUser = redisTemplate.opsForValue().get("user:id_" + userId);
        User user = null;
        if (null != user) {
            user = JsonUtil.jsonStr2Object((String) jsonUser, User.class);
            return user;
        }
    // Redis 没有再从 mysql 查询
        user = userDao.queryUserById(userId);
        if (null != user) {
            redisTemplate.opsForValue().set("user:id_" + userId, JsonUtil.object2JsonStr(user));
            return user;
        }
        return null;
    }
}

　　

applicationContext-redis.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"
       xmlns:p="http://www.springframework.org/schema/p"
       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="1024"/>
        <!--  最大 空闲连接数  -->
        <property name="maxIdle" value="200"/>
        <!--  获取连接时最大等待毫秒数  -->
        <property name="maxWaitMillis" value="10000"/>
        <!--  在获取连接时检查有效性  -->
        <property name="testOnBorrow" value="true"/>
    </bean>
    <!--  客户端连接工厂  -->
    <bean id="jedisConnFactory"
          class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
          p:use-pool="true" p:host-name="192.168.48.130" p:port="6379" >
        <!--p:use-pool="true" p:host-name="192.168.48.130" p:port="6379" p:password="root">-->
        <!--  连接池引用  -->
        <constructor-arg name="poolConfig" ref="jedisPoolConfig"/>
    </bean>
    <!-- redisTemplate  配置  -->
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
          p:connection-factory-ref="jedisConnFactory">
        <!--  配置序列化操作  -->
        <property name="keySerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
        </property>
        <property name="valueSerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
        </property>
        <property name="hashKeySerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
        </property>
        <property name="hashValueSerializer">
            <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
        </property>
    </bean>
</beans>