java：redis（java代码操作redis）

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.redis.mapper.ItemMapper" >
  <resultMap id="BaseResultMap" type="com.redis.model.Item" >
    <!--
      WARNING - @mbg.generated
    -->
    <id column="id" property="id" jdbcType="BIGINT" />
    <result column="title" property="title" jdbcType="VARCHAR" />
    <result column="sell_point" property="sellPoint" jdbcType="VARCHAR" />
    <result column="price" property="price" jdbcType="BIGINT" />
    <result column="num" property="num" jdbcType="INTEGER" />
    <result column="barcode" property="barcode" jdbcType="VARCHAR" />
    <result column="image" property="image" jdbcType="VARCHAR" />
    <result column="cid" property="cid" jdbcType="BIGINT" />
    <result column="status" property="status" jdbcType="TINYINT" />
    <result column="created" property="created" jdbcType="TIMESTAMP" />
    <result column="updated" property="updated" jdbcType="TIMESTAMP" />
  </resultMap>
</mapper>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!-- mybatis默认是没有开启延迟加载的 需要手动开启 -->
    <settings>
        <!-- 延迟加载 默认false -->
        <setting name="lazyLoadingEnabled" value="true" />
        <!-- 积极加载 默认true -->
        <setting name="aggressiveLazyLoading" value="false" />
        <!--开启缓存-->
        <setting name="cacheEnabled" value="true"/>
    </settings>
</configuration>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context" xmlns="http://www.springframework.org/schema/beans"
    xsi:schemaLocation="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/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!--数据源配置 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件，**表示迭代查找 -->
        <property name="mapperLocations" value="classpath*:mapper/*Mapper.xml" />
        <!--mybatis配置文件位置 -->
        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml" />
    </bean>

    <!--扫描com.redis下的mapper接口 -->
    <bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.redis" />
        <!--使用mybatis通用mapper插件 -->
        <property name="properties">
            <value>
                mappers=tk.mybatis.mapper.common.Mapper
            </value>
        </property>
    </bean>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.3.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd 
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">

    <!-- 配置redis自带的连接池配置(jedisPool) -->
    <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="false" />
        <!-- 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数据库集群连接池配置 -->
    <bean id="jedisCluster" class="redis.clients.jedis.JedisCluster">
        <!-- 首先要把连接池的配置信息引入 -->
        <constructor-arg name="poolConfig" ref="jedisPoolConfig" />
        <!-- 然后需要配置集群中各个节点信息 eg:因为redis最少需要6台服务器(称之为6个节点) -->
        <constructor-arg name="nodes">
            <set>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host1}" /><!-- 
                        每一台节点的ip地址 -->
                    <constructor-arg name="port" value="${redis.port1}" /><!-- 
                        每一台redis节点的端口号 -->
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host2}" />
                    <constructor-arg name="port" value="${redis.port2}" />
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host3}" />
                    <constructor-arg name="port" value="${redis.port3}" />
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host4}" />
                    <constructor-arg name="port" value="${redis.port4}" />
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host5}" />
                    <constructor-arg name="port" value="${redis.port5}" />
                </bean>
                <bean class="redis.clients.jedis.HostAndPort">
                    <constructor-arg name="host" value="${redis.host6}" />
                    <constructor-arg name="port" value="${redis.port6}" />
                </bean>
            </set>
        </constructor-arg>
    </bean>

    <bean id="redisService" class="com.redis.service.impl.RedisServiceImpl">
        <property name="jedisCluster" ref="jedisCluster"></property>
    </bean>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context" xmlns="http://www.springframework.org/schema/beans"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 事务详情 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- read-only="true" 该事务为只读事务 -->
            <tx:method name="select*" read-only="true" />
            <tx:method name="find*" read-only="true" />
            <tx:method name="get*" read-only="true" />
            <tx:method name="query*" read-only="true" />
            <tx:method name="*" />
        </tx:attributes>
    </tx:advice>
    <!--支持基于注解的aspectj -->
    <aop:aspectj-autoproxy />

    <!--aop编程，切入点表达式 确定增强的连接器，从而获得切入点
        为什么aop这里切service而不是controller？
     -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.redis.service..*.*(..)))" />
    </aop:config>
</beans>

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">


    <!-- 自动扫描且只扫描@Controller 扫描的是controller -->
    <context:component-scan base-package="com.redis.controller" />
    
    <!-- DispatcherServlet是springmvc的入口类 -->
    <!-- 当在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 映射时，能映射静态资源 -->
    <!-- 除了动态资源以后，其他都不拦截(js,css,pictures,font...) -->
    <mvc:default-servlet-handler />

    <!-- 可用在springmvc.xml配置文件中使用<mvc:annotation-driven>替代注解处理器和适配器的配置。 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <!-- springmvc自带的中文编码转换器 -->
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <constructor-arg index="0" value="UTF-8" />
            </bean>
            <!-- json的格式化 -->
            <bean
                class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="prettyPrint" value="true" />
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

#mysql connector
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root

#redis cluster connector
redis.host1=192.168.1.186
redis.port1=6380

redis.host2=192.168.1.186
redis.port2=6381

redis.host3=192.168.1.186
redis.port3=6382

redis.host4=192.168.1.186
redis.port4=6383

redis.host5=192.168.1.186
redis.port5=6384

redis.host6=192.168.1.186
redis.port6=6385

#item key
ITEM_INFO_KEY=ITEM_INFO_KEY

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context" xmlns="http://www.springframework.org/schema/beans"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">
    
    
    <!-- 首先加载application.properties配置文件 -->
    <context:property-placeholder location="classpath:application.properties" />
    
    <!-- spring扫描service -->
    <context:component-scan base-package="com.redis.service" />
    
    <!-- 分离核心配置，把spring和springmvc以及mybatis的配置单独成立一个xml文件，在applicationContext中导入 -->
    <!-- 导入springmvc配置文件 -->
    <import resource="springmvc/applicationContext-mvc.xml"/>
    <!-- 导入jdbc配置文件 -->
    <import resource="spring/applicationContext-db.xml"/>
    <!-- 导入事务管理的配置文件 -->
    <import resource="spring/applicationContext-tx.xml"/>
    <!-- 导入redis集群的配置信息 -->
    <import resource="spring/applicationContext-redis.xml"/>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
         http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <!--spring入口文件的配置 -->
    <!-- 确定配置文件位置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- 配置spring 监听器，加载xml配置文件 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 解决POST请求的中文乱码 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- DispatcherServlet：前端控制器 配置前端控制器servlet -->
    <servlet>
        <servlet-name>redis_demo</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--加载前端控制器配置文件 上下文配置位置 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc/applicationContext-mvc.xml</param-value>
        </init-param>
        <!-- 表示随WEB服务器启动 -->
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>redis_demo</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.redis</groupId>
    <artifactId>redis_demo</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>redis_demo Maven Webapp</name>
    <url>http://maven.apache.org</url>
    
    <!-- 统一配置 -->
    <properties>
        <!-- junit begin -->
        <junit.version>4.12</junit.version>
        <!-- junit end -->
        
        <!-- spring begin -->
        <spring.version>4.3.4.RELEASE</spring.version>
        <!-- spring end -->
        
        <!-- json begin -->
        <jackson.version>2.8.1</jackson.version>
        <fastjson.version>1.2.17</fastjson.version>
        <!-- json end -->
        
        <!-- servlet jsp jstl begin -->
        <servlet-api.version>3.0.1</servlet-api.version>
        <jsp-api.version>2.0</jsp-api.version>
        <jstl.version>1.2</jstl.version>
        <!-- servlet jsp jstl end -->
        
        <!-- mysql begin -->
        <mysql.version>5.1.40</mysql.version>
        <!-- mysql begin -->
        
        <!-- druid begin -->
        <druid.version>1.0.26</druid.version>
        <!-- druid end -->
        
        <!-- mybatis begin -->
        <mybatis.version>3.3.0</mybatis.version>
        <mybatis.spring.version>1.2.3</mybatis.spring.version>
        <mybatis.paginator.version>1.2.15</mybatis.paginator.version>
        <mybatis.mapper.version>3.3.9</mybatis.mapper.version>
        <!-- mybatis end -->
        
        <!-- ehcache begin -->
        <ehcache.version>2.10.3</ehcache.version>
        <!-- ehcache end -->

        <!-- redis begin -->
        <jedis.version>2.9.0</jedis.version>
        <spring-data-redis.version>1.7.2.RELEASE</spring-data-redis.version>
        <!-- redis end -->
        
    </properties>
    
    <dependencies>
        <!-- 所需要的jar包 -->
        <!-- junit start -->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            <!-- junit end -->

            <!--spring start -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring.version}</version>
                <scope>test</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${spring.version}</version>
            </dependency>

            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <!--spring end -->

            <!--json start -->
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>${jackson.version}</version>
            </dependency>

            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
            </dependency>

            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>${jackson.version}</version>
            </dependency>

            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>${fastjson.version}</version>
            </dependency>
            <!--json end -->

            <!-- servlet -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>${servlet-api.version}</version>
                <scope>provided</scope>
            </dependency>

            <!-- jsp -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <version>${jsp-api.version}</version>
                <scope>provided</scope>
            </dependency>

            <!-- jstl -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>${jstl.version}</version>
                <scope>runtime</scope>
            </dependency>

            <!-- database begin -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>${mybatis.spring.version}</version>
            </dependency>
            <!-- database end -->

            <!-- mybatis plugins begin -->
            <dependency>
                <groupId>tk.mybatis</groupId>
                <artifactId>mapper</artifactId>
                <version>${mybatis.mapper.version}</version>
            </dependency>
            <!-- mybatis plugins end -->

            <!--ehcache 缓存配置 -->
            <dependency>
                <groupId>net.sf.ehcache</groupId>
                <artifactId>ehcache</artifactId>
                <version>${ehcache.version}</version>
            </dependency>

            <!-- redis begin -->
            <dependency>
                <groupId>redis.clients</groupId>
                <artifactId>jedis</artifactId>
                <version>${jedis.version}</version>
            </dependency>

            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-redis</artifactId>
                <version>${spring-data-redis.version}</version>
            </dependency>
            <!-- redis end -->

        
    </dependencies>
    <build>
        <finalName>redis_demo</finalName>
    </build>
</project>

package com.redis.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.redis.service.IRedisService;
import com.redis.service.RedisDemoService;

@RestController
@RequestMapping("/redis")
public class RedisDemoController {
    
    @Autowired
    private RedisDemoService redisDemoService;
    @Autowired
    private IRedisService redisService;
    
    @RequestMapping(value="/demo",method=RequestMethod.GET)
    public String demo() {
//        Map<String, Object> resultMap = new HashMap<String, Object>();
//        // 调用service
//        String result = redisDemoService.demoService();
//        if(result != null && "ok".equals(result.toLowerCase())) {
//            resultMap.put("status", 200);
//        } else {
//            resultMap.put("status", 500);
//        }
//        return JSONUtil.toJSONString(resultMap);
        
        return redisDemoService.findAllItems(redisService);
    }

}

package com.redis.mapper;

import com.redis.model.Item;
import tk.mybatis.mapper.common.Mapper;

public interface ItemMapper extends Mapper<Item> {
}

package com.redis.model;

import java.util.Date;
import javax.persistence.*;

@Table(name = "ego_item")
public class Item {
    /**
     * 商品id，同时也是商品编号
     */
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    /**
     * 商品标题
     */
    private String title;

    /**
     * 商品卖点
     */
    @Column(name = "sell_point")
    private String sellPoint;

    /**
     * 商品价格，单位为：分
     */
    private Long price;

    /**
     * 库存数量
     */
    private Integer num;

    /**
     * 商品条形码
     */
    private String barcode;

    /**
     * 商品图片
     */
    private String image;

    /**
     * 所属类目，叶子类目
     */
    private Long cid;

    /**
     * 商品状态，1-正常，2-下架，3-删除
     */
    private Byte status;

    /**
     * 创建时间
     */
    private Date created;

    /**
     * 更新时间
     */
    private Date updated;

    /**
     * 获取商品id，同时也是商品编号
     *
     * @return id - 商品id，同时也是商品编号
     */
    public Long getId() {
        return id;
    }

    /**
     * 设置商品id，同时也是商品编号
     *
     * @param id 商品id，同时也是商品编号
     */
    public void setId(Long id) {
        this.id = id;
    }

    /**
     * 获取商品标题
     *
     * @return title - 商品标题
     */
    public String getTitle() {
        return title;
    }

    /**
     * 设置商品标题
     *
     * @param title 商品标题
     */
    public void setTitle(String title) {
        this.title = title == null ? null : title.trim();
    }

    /**
     * 获取商品卖点
     *
     * @return sell_point - 商品卖点
     */
    public String getSellPoint() {
        return sellPoint;
    }

    /**
     * 设置商品卖点
     *
     * @param sellPoint 商品卖点
     */
    public void setSellPoint(String sellPoint) {
        this.sellPoint = sellPoint == null ? null : sellPoint.trim();
    }

    /**
     * 获取商品价格，单位为：分
     *
     * @return price - 商品价格，单位为：分
     */
    public Long getPrice() {
        return price;
    }

    /**
     * 设置商品价格，单位为：分
     *
     * @param price 商品价格，单位为：分
     */
    public void setPrice(Long price) {
        this.price = price;
    }

    /**
     * 获取库存数量
     *
     * @return num - 库存数量
     */
    public Integer getNum() {
        return num;
    }

    /**
     * 设置库存数量
     *
     * @param num 库存数量
     */
    public void setNum(Integer num) {
        this.num = num;
    }

    /**
     * 获取商品条形码
     *
     * @return barcode - 商品条形码
     */
    public String getBarcode() {
        return barcode;
    }

    /**
     * 设置商品条形码
     *
     * @param barcode 商品条形码
     */
    public void setBarcode(String barcode) {
        this.barcode = barcode == null ? null : barcode.trim();
    }

    /**
     * 获取商品图片
     *
     * @return image - 商品图片
     */
    public String getImage() {
        return image;
    }

    /**
     * 设置商品图片
     *
     * @param image 商品图片
     */
    public void setImage(String image) {
        this.image = image == null ? null : image.trim();
    }

    /**
     * 获取所属类目，叶子类目
     *
     * @return cid - 所属类目，叶子类目
     */
    public Long getCid() {
        return cid;
    }

    /**
     * 设置所属类目，叶子类目
     *
     * @param cid 所属类目，叶子类目
     */
    public void setCid(Long cid) {
        this.cid = cid;
    }

    /**
     * 获取商品状态，1-正常，2-下架，3-删除
     *
     * @return status - 商品状态，1-正常，2-下架，3-删除
     */
    public Byte getStatus() {
        return status;
    }

    /**
     * 设置商品状态，1-正常，2-下架，3-删除
     *
     * @param status 商品状态，1-正常，2-下架，3-删除
     */
    public void setStatus(Byte status) {
        this.status = status;
    }

    /**
     * 获取创建时间
     *
     * @return created - 创建时间
     */
    public Date getCreated() {
        return created;
    }

    /**
     * 设置创建时间
     *
     * @param created 创建时间
     */
    public void setCreated(Date created) {
        this.created = created;
    }

    /**
     * 获取更新时间
     *
     * @return updated - 更新时间
     */
    public Date getUpdated() {
        return updated;
    }

    /**
     * 设置更新时间
     *
     * @param updated 更新时间
     */
    public void setUpdated(Date updated) {
        this.updated = updated;
    }
}

package com.redis.service.impl;

import com.redis.service.IRedisService;

import redis.clients.jedis.JedisCluster;

public class RedisServiceImpl implements IRedisService {
    
    private JedisCluster jedisCluster;
    

    public void setJedisCluster(JedisCluster jedisCluster) {
        this.jedisCluster = jedisCluster;
    }

    @Override
    public String set(String key, String value) {
        return jedisCluster.set(key, value);
    }

    @Override
    public String get(String key) {
        return jedisCluster.get(key);
    }

    @Override
    public Long hset(String key, String field, String value) {
        return null;
    }

    @Override
    public String hget(String key, String field) {
        return null;
    }

    @Override
    public Long del(String... keys) {
        return null;
    }

    @Override
    public Long hdel(String key, String... fields) {
        return null;
    }

    @Override
    public Boolean exists(String key) {
        return null;
    }

    @Override
    public Long expire(String key, int seconds) {
        return null;
    }

    @Override
    public Long ttl(String key) {
        return null;
    }

    @Override
    public Long incr(String key) {
        return null;
    }

}

package com.redis.service;

public interface IRedisService {
    
    /**
     * 设置指定 key 的值
     * 
     * @param key
     * @param value
     * @return
     */
    String set(String key, String value);

    /**
     * 获取指定 key 的值
     * 
     * @param key
     * @return
     */
    String get(String key);

    /**
     * 设置存储在哈希表中指定字段的值
     * 
     * @param key
     * @param field
     * @param value
     * @return
     */
    Long hset(String key, String field, String value);

    /**
     * 获取存储在哈希表中指定字段的值
     * 
     * @param key
     * @param field
     * @return
     */
    String hget(String key, String field);

    /**
     * 删除 key和对应的值
     * 
     * @param keys
     * @return
     */
    Long del(String... keys);

    /**
     * 删除key的哈希表字段
     * 
     * @param key
     * @param fields
     * @return
     */
    Long hdel(String key, String... fields);

    /**
     * 检查给定 key 是否存在
     * 
     * @param key
     * @return
     */
    Boolean exists(String key);

    /**
     * 为给定 key 设置过期时间
     * 
     * @param key
     * @param seconds
     * @return
     */
    Long expire(String key, int seconds);

    /**
     * 以秒为单位返回 key 的剩余过期时间
     * 
     * @param key
     * @return
     */
    Long ttl(String key);
    
    /**
     * 自增
     * @param key
     * @return
     */
    Long incr(String key);

}

package com.redis.service;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import com.redis.mapper.ItemMapper;
import com.redis.utils.JSONUtil;

@Service
public class RedisDemoService {
    
    @Value("${ITEM_INFO_KEY}")
    private String itemInfoKey;

    @Autowired
    private ItemMapper itemMapper;
//    @Autowired
//    private IRedisService redisService;

    
    public String demoService() {
        String itemJson = JSONUtil.toJSONString(itemMapper.selectAll());
        String result = null;
        if(itemJson.isEmpty()) {
            return result;
        }
        //result = redisService.set(itemInfoKey, itemJson);// 如果存储生成，返回OK
        return result;
    }
    
    // findAllItems这个方法需要向前端项目传递商品数据
    public String findAllItems(IRedisService redisService) {
        // 如果缓存中已经有itemInfoKey的数据了，直接就从缓存中取，不再查询数据库，而且也不需要存入redis
        Map<Integer, Object> resultMap = new HashMap<Integer, Object>();
        String itemJsons = "";
        // 从redis数据库中查询数据
        itemJsons = redisService.get(itemInfoKey);
        // 如果redis中没有该数据
        if(itemJsons.isEmpty()) {
            // 从mysql中查询出需要的数据
            itemJsons = JSONUtil.toJSONString(itemMapper.selectAll());
            // 存入redis集群中
            String result = redisService.set(itemInfoKey, itemJsons);
            
            if("ok".equals(result.toLowerCase())) {
                resultMap.put(200, itemJsons);
            } else {
                resultMap.put(500, null);
            }
        } else {
            resultMap.put(200, itemJsons);
        }
        return JSONUtil.toJSONString(resultMap);
    }
}

package com.redis.utils;

import java.util.List;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JSONUtil {

    // 定义jackson对象
    private static final ObjectMapper mapper = new ObjectMapper();
    /**
     * 将对象转换成json字符串
     * @param data
     * @return
     */
    public static String toJSONString(Object data) {
        try {
            String string = mapper.writeValueAsString(data);
            return string;
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 将json结果集转化为对象
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T> T parseObject(String jsonData, Class<T> beanType) {
        try {
            T t = mapper.readValue(jsonData, beanType);
            return t;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 将json数据转换成list
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T> List<T> parseArray(String jsonData, Class<T> beanType) {
        JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, beanType);
        try {
            List<T> list = mapper.readValue(jsonData, javaType);
            return list;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}