springboot2.0+jpa+redis數據緩存管理，擴展RedisTemplate操作各種數據類型

pom文件

<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.xyy</groupId>
	<artifactId>cache</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>cache</name>
	<description>Demo project for Spring Boot</description>
    <packaging>jar</packaging>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<thymeleaf-version>3.0.0.RELEASE</thymeleaf-version>
		<thymeleaf-layout-dialect.version>2.0.0</thymeleaf-layout-dialect.version>
		<java.version>1.8</java.version>
		<elasticsearch.version>6.4.0</elasticsearch.version>
		<spring.data.elasticsearch.version>3.1.0.RELEASE</spring.data.elasticsearch.version>
	</properties>

	<dependencies>
		<!--緩存-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-cache</artifactId>
		</dependency>
		<!--web-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!--start-->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
		</dependency>
		<!--mysql-->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<!--alibb數據源-->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-redis -->
		<!--redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!--使用redis做緩存這個包需要導入-->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
		</dependency>
		<!-- 將作爲Redis對象序列化器 ，也可以使用其他的-->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.7</version>
		</dependency>
		<!--ceshi-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<!--自動提示-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

redisconfig

package com.xyy.cache.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConfiguration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.*;

import java.lang.reflect.Method;
import java.time.Duration;


@Configuration
public class RedisConfig extends CachingConfigurerSupport{

    private static final Logger lg = LoggerFactory.getLogger(RedisConfiguration.class);
    @Bean
    public KeyGenerator KeyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }
    @ConditionalOnMissingBean({CacheManager.class})
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        System.out.println("=========加載緩存管理器========");
        RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofDays(1))
                .disableCachingNullValues()
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
        return RedisCacheManager.builder(redisConnectionFactory).cacheDefaults(cacheConfiguration).build();
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory ) {
        RedisTemplate<String,Object> template = new RedisTemplate<>();
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
        template.setKeySerializer(redisSerializer);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        System.out.println("=============redisTemplate開始初始化==============");
        return template;
    }

}

application.yml

#服務端口
server:
  port: 8082
#連接數據庫
spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/blog?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8
    #useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false
    #useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource    #使用阿里數據源
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
    database-platform: 
  cache:
    type: redis
  #redis做緩存配置
  redis:
    #數據庫索引
    database: 0
    host: 127.0.0.1
    port: 6379
    password:
    lettuce:
      pool:
        max-active: 8
        max-wait: -1ms
        min-idle: 0
        max-idle: 5
      shutdown-timeout: 5000ms
#日誌
logging:
  level:
    root: info
  file: G:/log/info.log


user

```java
package com.xyy.cache.bean.mysqljpa;

import com.fasterxml.jackson.annotation.JsonBackReference;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import javax.persistence.*;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.Size;
import java.io.Serializable;
import java.util.List;

@JsonIgnoreProperties(value = { "hibernateLazyInitializer", "handler" })
@Entity
@Table(name = "user")
public class User implements Serializable {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "id")
    private Integer uid;

    @NotEmpty(message = "賬號不能爲空")
    @Size(min=3, max=20)
    @Column(name = "username",nullable = false, length = 20, unique = true)
    private String username;

    @NotEmpty(message = "密碼不能爲空")
    @Size(max=100)
    @Column(name = "password")
    private  String password;

    public Integer getUid() {
        return uid;
    }

    public void setUid(Integer uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User{" +
                "uid=" + uid +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

UserDao

```java
@Transactional
@Repository
public interface UserRepository extends JpaRepository<User,Integer> {
 List<User> findAll();
}

UserService

public interface UserService {
    List<User> findAll();
}

實現

package com.xyy.cache.service.Impl;

import com.alibaba.fastjson.JSON;
import com.xyy.cache.repository.UserRepository;
import com.xyy.cache.bean.mysqljpa.User;
import com.xyy.cache.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;
    
 	@Cacheable(value = "aa", key = "'1'")
    public String getUser() {
        // 該打印用來判斷是否重複進入方法內
        System.out.println("in");
        // 如果return null 不會緩存，必須有返回值
        return "1";
    }
    
	@Cacheable(cacheNames = "user")
    @Override
    public List<User> findAll() {
      return userRepository.findAll();
    }
}

controller

package com.xyy.cache.controller;


import com.xyy.cache.repository.UserRepository;
import com.xyy.cache.bean.mysqljpa.User;
import com.xyy.cache.service.Impl.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Controller
public class UserController {
    @Autowired
    private UserServiceImpl userService;

    @ResponseBody
    @GetMapping("/s")
    public void getUser(){
        userService.getUser();
    }

    @ResponseBody
    @RequestMapping("/findAllUser")
    public List<User> findAll(){
        List<User> stuList = userService.findAll();
        return stuList;
    }

 
}

啓動類加註解@EnableCaching

package com.xyy.cache;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.scheduling.annotation.EnableScheduling;

@ComponentScan(basePackages = "com.xyy.cache.*")
@EnableCaching
@SpringBootApplication(exclude ={DataSourceAutoConfiguration.class})
public class CachedemoApplication {


	public static void main(String[] args) {
	SpringApplication.run(CachedemoApplication.class, args);
	}
}

測試

由於這個請求沒有返回值，所以我們看redis裏是否進行了緩存，如果沒有緩存控制檯會打印“in”這個字符串

可以看到緩存中已經有了，
我們先把他刪除，然後在請求，第一次就會控制檯打印東西，而第二次不會，這是緩存中已經有了

在請求，可以看到並沒有再次打印in

查詢所有用戶

我們這裏請求兩次，看redis裏，看控制檯

只打印了一次說明第二次查是從緩存中查的。

注：Springboot 中 Redis緩存使用 @Cacheable不生效的原因
可以參考：https://blog.csdn.net/qq_15071263/article/details/84553102

擴展使用Redistemplate操作緩存

redisUtils

package com.xyy.cache.util;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@Component
public class RedisUtil {

    private RedisTemplate<String, Object> redisTemplate;

    public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }
//=============================common============================
    /**
     * 指定緩存失效時間
     * @param key 鍵
     * @param time 時間(秒)
     * @return
     */
    public boolean expire(String key,long time){
        try {
            if(time>0){
                redisTemplate.expire(key, time, TimeUnit.SECONDS);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 根據key 獲取過期時間
     * @param key 鍵 不能爲null
     * @return 時間(秒) 返回0代表爲永久有效
     */
    public long getExpire(String key){
        return redisTemplate.getExpire(key,TimeUnit.SECONDS);
    }

    /**
     * 判斷key是否存在
     * @param key 鍵
     * @return true 存在 false不存在
     */
    public boolean hasKey(String key){
        try {
            return redisTemplate.hasKey(key);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 刪除緩存
     * @param key 可以傳一個值 或多個
     */
    @SuppressWarnings("unchecked")
    public void del(String ... key){
        if(key!=null&&key.length>0){
            if(key.length==1){
                redisTemplate.delete(key[0]);
            }else{
                redisTemplate.delete(CollectionUtils.arrayToList(key));
            }
        }
    }

//============================String=============================
    /**
     * 普通緩存獲取
     * @param key 鍵
     * @return 值
     */
    public Object get(String key){
        return key==null?null:redisTemplate.opsForValue().get(key);
    }

    /**
     * 普通緩存放入
     * @param key 鍵
     * @param value 值
     * @return true成功 false失敗
     */
    public boolean set(String key,Object value) {
        try {
            redisTemplate.opsForValue().set(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

    }

    /**
     * 普通緩存放入並設置時間
     * @param key 鍵
     * @param value 值
     * @param time 時間(秒) time要大於0 如果time小於等於0 將設置無限期
     * @return true成功 false 失敗
     */
    public boolean set(String key,Object value,long time){
        try {
            if(time>0){
                redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
            }else{
                set(key, value);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 遞增
     * @param key 鍵
     * @paramby 要增加幾(大於0)
     * @return
     */
    public long incr(String key, long delta){
        if(delta<0){
            throw new RuntimeException("遞增因子必須大於0");
        }
        return redisTemplate.opsForValue().increment(key, delta);
    }

    /**
     * 遞減
     * @param key 鍵
     * @paramby 要減少幾(小於0)
     * @return
     */
    public long decr(String key, long delta){
        if(delta<0){
            throw new RuntimeException("遞減因子必須大於0");
        }
        return redisTemplate.opsForValue().increment(key, -delta);
    }

//================================Map=================================
    /**
     * HashGet
     * @param key 鍵 不能爲null
     * @param item 項 不能爲null
     * @return 值
     */
    public Object hget(String key,String item){
        return redisTemplate.opsForHash().get(key, item);
    }

    /**
     * 獲取hashKey對應的所有鍵值
     * @param key 鍵
     * @return 對應的多個鍵值
     */
    public Map<Object,Object> hmget(String key){
        return redisTemplate.opsForHash().entries(key);
    }

    /**
     * HashSet
     * @param key 鍵
     * @param map 對應多個鍵值
     * @return true 成功 false 失敗
     */
    public boolean hmset(String key, Map<String,Object> map){
        try {
            redisTemplate.opsForHash().putAll(key, map);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * HashSet 並設置時間
     * @param key 鍵
     * @param map 對應多個鍵值
     * @param time 時間(秒)
     * @return true成功 false失敗
     */
    public boolean hmset(String key, Map<String,Object> map, long time){
        try {
            redisTemplate.opsForHash().putAll(key, map);
            if(time>0){
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 向一張hash表中放入數據,如果不存在將創建
     * @param key 鍵
     * @param item 項
     * @param value 值
     * @return true 成功 false失敗
     */
    public boolean hset(String key,String item,Object value) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 向一張hash表中放入數據,如果不存在將創建
     * @param key 鍵
     * @param item 項
     * @param value 值
     * @param time 時間(秒)  注意:如果已存在的hash表有時間,這裏將會替換原有的時間
     * @return true 成功 false失敗
     */
    public boolean hset(String key,String item,Object value,long time) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            if(time>0){
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 刪除hash表中的值
     * @param key 鍵 不能爲null
     * @param item 項 可以使多個 不能爲null
     */
    public void hdel(String key, Object... item){
        redisTemplate.opsForHash().delete(key,item);
    }

    /**
     * 判斷hash表中是否有該項的值
     * @param key 鍵 不能爲null
     * @param item 項 不能爲null
     * @return true 存在 false不存在
     */
    public boolean hHasKey(String key, String item){
        return redisTemplate.opsForHash().hasKey(key, item);
    }

    /**
     * hash遞增 如果不存在,就會創建一個 並把新增後的值返回
     * @param key 鍵
     * @param item 項
     * @param by 要增加幾(大於0)
     * @return
     */
    public double hincr(String key, String item,double by){
        return redisTemplate.opsForHash().increment(key, item, by);
    }

    /**
     * hash遞減
     * @param key 鍵
     * @param item 項
     * @param by 要減少記(小於0)
     * @return
     */
    public double hdecr(String key, String item,double by){
        return redisTemplate.opsForHash().increment(key, item,-by);
    }

//============================set=============================
    /**
     * 根據key獲取Set中的所有值
     * @param key 鍵
     * @return
     */
    public Set<Object> sGet(String key){
        try {
            return redisTemplate.opsForSet().members(key);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 根據value從一個set中查詢,是否存在
     * @param key 鍵
     * @param value 值
     * @return true 存在 false不存在
     */
    public boolean sHasKey(String key,Object value){
        try {
            return redisTemplate.opsForSet().isMember(key, value);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 將數據放入set緩存
     * @param key 鍵
     * @param values 值 可以是多個
     * @return 成功個數
     */
    public long sSet(String key, Object...values) {
        try {
            return redisTemplate.opsForSet().add(key, values);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 將set數據放入緩存
     * @param key 鍵
     * @param time 時間(秒)
     * @param values 值 可以是多個
     * @return 成功個數
     */
    public long sSetAndTime(String key,long time,Object...values) {
        try {
            Long count = redisTemplate.opsForSet().add(key, values);
            if(time>0) expire(key, time);
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 獲取set緩存的長度
     * @param key 鍵
     * @return
     */
    public long sGetSetSize(String key){
        try {
            return redisTemplate.opsForSet().size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 移除值爲value的
     * @param key 鍵
     * @param values 值 可以是多個
     * @return 移除的個數
     */
    public long setRemove(String key, Object ...values) {
        try {
            Long count = redisTemplate.opsForSet().remove(key, values);
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
//===============================list=================================

    /**
     * 獲取list緩存的內容
     * @param key 鍵
     * @param start 開始
     * @param end 結束  0 到 -1代表所有值
     * @return
     */
    public List<Object> lGet(String key, long start, long end){
        try {
            return redisTemplate.opsForList().range(key, start, end);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 獲取list緩存的長度
     * @param key 鍵
     * @return
     */
    public long lGetListSize(String key){
        try {
            return redisTemplate.opsForList().size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 通過索引 獲取list中的值
     * @param key 鍵
     * @param index 索引  index>=0時， 0 表頭，1 第二個元素，依次類推；index<0時，-1，表尾，-2倒數第二個元素，依次類推
     * @return
     */
    public Object lGetIndex(String key,long index){
        try {
            return redisTemplate.opsForList().index(key, index);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 將list放入緩存
     * @param key 鍵
     * @param value 值
     * @paramtime時間(秒)
     * @return
     */
    public boolean lSet(String key, Object value) {
        try {
            redisTemplate.opsForList().rightPush(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 將list放入緩存
     * @param key 鍵
     * @param value 值
     * @param time 時間(秒)
     * @return
     */
    public boolean lSet(String key, Object value, long time) {
        try {
            redisTemplate.opsForList().rightPush(key, value);
            if (time > 0) expire(key, time);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 將list放入緩存
     * @param key 鍵
     * @param value 值
     * @paramtime 時間(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value) {
        try {
            redisTemplate.opsForList().rightPushAll(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 將list放入緩存
     * @param key 鍵
     * @param value 值
     * @param time 時間(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value, long time) {
        try {
            redisTemplate.opsForList().rightPushAll(key, value);
            if (time > 0) expire(key, time);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 根據索引修改list中的某條數據
     * @param key 鍵
     * @param index 索引
     * @param value 值
     * @return
     */
    public boolean lUpdateIndex(String key, long index,Object value) {
        try {
            redisTemplate.opsForList().set(key, index, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 移除N個值爲value
     * @param key 鍵
     * @param count 移除多少個
     * @param value 值
     * @return 移除的個數
     */
    public long lRemove(String key,long count,Object value) {
        try {
            Long remove = redisTemplate.opsForList().remove(key, count, value);
            return remove;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
}

redisController

package com.xyy.cache.controller;

import com.xyy.cache.util.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.Cursor;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ScanOptions;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

@Controller
public class RedisController {
    @Autowired
    RedisTemplate redisTemplate;
    @Autowired
    RedisUtil redisUtil;

    //字符串
    @ResponseBody
    @GetMapping("/redisValue")
    public String redisValue(String testValue){
        //redisTemplate.opsForValue().set(key,value);                                  添加
        //redisTemplate.opsForValue().set(key,value,7200, TimeUnit.SECONDS);           添加並設置過期時間
        //redisTemplate.opsForValue().increment(user_count,1);                         自增
        //redisTemplate.opsForValue().getAndSet(key,newValue);                          獲取並重新設置新值
        //redisTemplate.opsForValue().append(key,hello);                                在value的末尾拼接上hello
        // redisTemplate.opsForValue().size(key);                                       獲取字符串的長度
        if(redisUtil.hasKey(testValue)){
            System.out.println(redisTemplate.getExpire(testValue));
            System.out.println("存在key，將從redis裏獲取");
        }else{
            System.out.println("不存在，查數據庫，查出結果放入緩存，在返回");
            redisUtil.set(testValue,"test1",5);
            System.out.println(redisTemplate.getExpire(testValue));
        }
        return redisUtil.get(testValue).toString();
    }
    //哈希
    @ResponseBody
    @GetMapping("/redisHashMap")
    public Map redisHashMap(String testValue){
        //添加單個
        redisUtil.hset("testhash","id","001");
        //添加多個
        HashMap map = new HashMap<>();
        map.put("name","小明");
        map.put("sex","男");
        redisUtil.hmset("testhash",map);
        //鍵集合
        Set<String> keys=redisTemplate.opsForHash().keys("testhash");
        System.out.println("keys"+keys);
        //value集合
        List values=redisTemplate.opsForHash().values("testhash");
        System.out.println("values"+values);
        //遍歷map,Cursor：遊標
        /*Cursor<Map.Entry<Object,Object>> entryCursor=redisTemplate.opsForHash().scan("scan", ScanOptions.NONE);
        while(entryCursor.hasNext()){
            Map.Entry<Object,Object> entry=entryCursor.next();
            System.out.println("鍵："+entry.getKey()+"值:"+entry.getValue());
        }*/
        //獲取整個map
        return redisUtil.hmget("testMap");

    }
    //集合
    @ResponseBody
    @GetMapping("/redisSet")
    public Set<Object> setRedis(String set){
        String[] ste=new String[]{"123","456","789","45"};
        redisTemplate.opsForSet().add(set,ste);
        //移除一個或多個
        ste=new String[]{"123"};
        redisTemplate.opsForSet().remove(set,ste);
        //遍歷
        Cursor<String> entryCursor=redisTemplate.opsForSet().scan("scan", ScanOptions.NONE);
        while(entryCursor.hasNext()){
            System.out.println("set:"+entryCursor.next());
        }
        return redisUtil.sGet(set);
    }

    //list列表
    @ResponseBody
    @GetMapping("/redisList")
    public List<String> redisList(){
       //表頭插入一個
        //redisTemplate.opsForList().leftPush("left-list","java");
        //表頭插入多個
        //String[] arr=new String[]{"JS","HTML","C#","C++"};
        //redisTemplate.opsForList().leftPushAll("left-list",arr);
        //表尾插入一個
        //redisTemplate.opsForList().rightPush("right-list","java");
        //表尾插入多個
        //redisTemplate.opsForList().rightPushAll("right-list",arr);
        //設置位置
        //redisTemplate.opsForList().set("right-list",0,"第一個");
        //刪除：count>0:刪除等於從頭到尾移動的值的元素。
        //count<0:刪除等於從尾到頭移動的值的元素。
        //count=0:刪除等於value的所有元素
        redisTemplate.opsForList().remove("right-list",1,"JS");
        return redisTemplate.opsForList().range("left-list",0,-1);
    }
    //有序集合
    /*@ResponseBody
    @GetMapping("/redisZset")
    public List<String> redisZset(){
        redisTemplate.opsForList().remove("right-list",1,"JS");
        return redisTemplate.opsForList().range("left-list",1,-1);
    }*/






}

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