自学内容网 自学内容网

从0开始搭建一个生产级SpringBoot2.0.X项目(八)SpringBoot 使用Redis

 前言

最近有个想法想整理一个内容比较完整springboot项目初始化Demo。

SpringBoot使用Redis 缓存数据

一、 pom引入依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
      

二、 application-dev.yaml 增加redis 连接配置

spring:
  datasource:
    driver-class-name: oracle.jdbc.OracleDriver
    url: jdbc:oracle:thin:@//127.0.0.1:1521/orcl2
    username: murg_demo
    password: 654321
  hikari:
    connection-test-query: SELECT 1 FROM DUAL
    minimum-idle: 10
    maximum-pool-size: 50
    idle-timeout: 1200000
    max-lifetime: 1800000
    connection-timeout: 180000
  cache:
    redis:
      time-to-live: 1800s
  redis:
    host: 127.0.0.1
    port: 6379
    password: admin

logging:
  level:
    org.springframework.security: debug

三、创建RedisConfig类,规定序列化格式

package com.murg.bootdemo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
public class RedisConfig {
    //redisTemplate注入到Spring容器
    @Bean
    public RedisTemplate<String,String> redisTemplate(RedisConnectionFactory factory){
        RedisTemplate<String,String> redisTemplate=new RedisTemplate<>();
        //‌自定义序列化方式使用String序列化‌:可以简化操作并提高查找效率。
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        redisTemplate.setConnectionFactory(factory);
        //key序列化
        redisTemplate.setKeySerializer(redisSerializer);
        //value序列化
        redisTemplate.setValueSerializer(redisSerializer);
        //value hashmap序列化
        redisTemplate.setHashKeySerializer(redisSerializer);
        //key hashmap序列化
        redisTemplate.setHashValueSerializer(redisSerializer);
        return redisTemplate;
    }
}

四、创建RedisUtils 工具类

package com.murg.bootdemo.util;

import com.google.common.collect.HashMultimap;
import org.springframework.context.annotation.Bean;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Component;
import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * @description: Redis工具类
 */
@Component
public class RedisUtils {

private  static StringRedisTemplate redisTemplate;

public RedisUtils(StringRedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}

/**
 * 写入缓存
 *
 * @param key   redis键
 * @param value redis值
 * @return 是否成功
 */
public static boolean set(final String key, String value) {
boolean result = false;
try {
ValueOperations<String, String> operations = redisTemplate.opsForValue();
operations.set(key, value);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}

/**
 * 写入缓存设置时效时间
 *
 * @param key   redis键
 * @param value redis值
 * @return 是否成功
 */
public static boolean set(final String key, String value, Long expireTime) {
boolean result = false;
try {
ValueOperations<String, String> operations = redisTemplate.opsForValue();
operations.set(key, value);
redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}

/**
 * 批量删除对应的键值对
 *
 * @param keys Redis键名数组
 */
public static void removeByKeys(final String... keys) {
for (String key : keys) {
remove(key);
}
}

/**
 * 批量删除Redis key
 *
 * @param pattern 键名包含字符串(如:myKey*)
 */
public static void removePattern(final String pattern) {
Set<String> keys = redisTemplate.keys(pattern);
if (keys != null && keys.size() > 0)
redisTemplate.delete(keys);
}

/**
 * 删除key,也删除对应的value
 *
 * @param key Redis键名
 */
public static void remove(final String key) {
if (exists(key)) {
redisTemplate.delete(key);
}
}

/**
 * 判断缓存中是否有对应的value
 *
 * @param key Redis键名
 * @return 是否存在
 */
public static Boolean exists(final String key) {
return redisTemplate.hasKey(key);
}

/**
 * 读取缓存
 *
 * @param key Redis键名
 * @return 是否存在
 */
public static String get(final String key) {
String result = null;
ValueOperations<String, String> operations = redisTemplate.opsForValue();
result = operations.get(key);
return result;
}

/**
 * 哈希 添加
 *
 * @param key     Redis键
 * @param hashKey 哈希键
 * @param value   哈希值
 */
public static void hmSet(String key, String hashKey, String value) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
hash.put(key, hashKey, value);
}

/**
 * 哈希获取数据
 *
 * @param key     Redis键
 * @param hashKey 哈希键
 * @return 哈希值
 */
public static String hmGet(String key, String hashKey) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
return hash.get(key, hashKey);
}

/**
 * 判断hash是否存在键
 *
 * @param key     Redis键
 * @param hashKey 哈希键
 * @return 是否存在
 */
public static boolean hmHasKey(String key, String hashKey) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
return hash.hasKey(key, hashKey);
}

/**
 * 删除hash中一条或多条数据
 *
 * @param key      Redis键
 * @param hashKeys 哈希键名数组
 * @return 删除数量
 */
public static long hmRemove(String key, String... hashKeys) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
return hash.delete(key, hashKeys);
}

/**
 * 获取所有哈希键值对
 *
 * @param key Redis键名
 * @return 哈希Map
 */
public static Map<String, String> hashMapGet(String key) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
return hash.entries(key);
}

/**
 * 保存Map到哈希
 *
 * @param key Redis键名
 * @param map 哈希Map
 */
public static void hashMapSet(String key, Map<String, String> map) {
HashOperations<String, String, String> hash = redisTemplate.opsForHash();
hash.putAll(key, map);
}

/**
 * 列表-追加值
 *
 * @param key   Redis键名
 * @param value 列表值
 */
public static void lPush(String key, String value) {
ListOperations<String, String> list = redisTemplate.opsForList();
list.leftPush(key, value);
}

/**
 * 列表-删除值
 *
 * @param key   Redis键名
 * @param value 列表值
 */
public static void lRemove(String key, String value) {
ListOperations<String, String> list = redisTemplate.opsForList();
list.remove(key, 0, value);
}




/**
 * 列表-获取指定范围数据
 *
 * @param key   Redis键名
 * @param start 开始行号(start:0,end:-1查询所有值)
 * @param end   结束行号
 * @return 列表
 */
public static List<String> lRange(String key, long start, long end) {
ListOperations<String, String> list = redisTemplate.opsForList();
return list.range(key, start, end);
}
/**
 * 集合添加
 *
 * @param key   Redis键名
 * @param value 值
 */
public static void add(String key, String value) {
SetOperations<String, String> set = redisTemplate.opsForSet();
set.add(key, value);
}

/**
 * 集合获取
 *
 * @param key Redis键名
 * @return 集合
 */
public static Set<String> setMembers(String key) {
SetOperations<String, String> set = redisTemplate.opsForSet();
return set.members(key);
}

/**
 * 有序集合添加
 *
 * @param key   Redis键名
 * @param value 值
 * @param score 排序号
 */
public static void zAdd(String key, String value, double score) {
ZSetOperations<String, String> zSet = redisTemplate.opsForZSet();
zSet.add(key, value, score);
}

/**
 * 有序集合-获取指定范围
 *
 * @param key        Redis键
 * @param startScore 开始序号
 * @param endScore   结束序号
 * @return 集合
 */
public static Set<String> rangeByScore(String key, double startScore, double endScore) {
ZSetOperations<String, String> zset = redisTemplate.opsForZSet();
return zset.rangeByScore(key, startScore, endScore);
}

/**
 * 模糊查询Redis键名
 *
 * @param pattern 键名包含字符串(如:myKey*)
 * @return 集合
 */
public static Set<String> keys(String pattern) {
return redisTemplate.keys(pattern);
}

/**
 * 获取多个hashMap
 *
 * @param keySet
 * @return List<Map < String, String>> hashMap列表
 */
public static List hashMapList(Collection<String> keySet) {
return redisTemplate.executePipelined(new SessionCallback<String>() {
@Override
public <K, V> String execute(RedisOperations<K, V> operations) throws DataAccessException {
HashOperations hashOperations = operations.opsForHash();
for (String key : keySet) {
hashOperations.entries(key);
}
return null;
}
});
}

/**
 * 保存多个哈希表(HashMap)(Redis键名可重复)
 *
 * @param batchMap Map<Redis键名,Map<键,值>>
 */
public static void batchHashMapSet(HashMultimap<String, Map<String, String>> batchMap) {
// 设置5秒超时时间
redisTemplate.expire("max", 25, TimeUnit.SECONDS);
redisTemplate.executePipelined(new RedisCallback<List<Map<String, String>>>() {

@Override
public List<Map<String, String>> doInRedis(RedisConnection connection) throws DataAccessException {
Iterator<Map.Entry<String, Map<String, String>>> iterator = batchMap.entries().iterator();
while (iterator.hasNext()) {
Map.Entry<String, Map<String, String>> hash = iterator.next();
// 哈希名,即表名
byte[] hashName = redisTemplate.getStringSerializer().serialize(hash.getKey());
Map<String, String> hashValues = hash.getValue();
Iterator<Map.Entry<String, String>> it = hashValues.entrySet().iterator();
// 将元素序列化后缓存,即表的多条哈希记录
Map<byte[], byte[]> hashes = new HashMap<byte[], byte[]>();
while (it.hasNext()) {
// hash中一条key-value记录
Map.Entry<String, String> entry = it.next();
byte[] key = redisTemplate.getStringSerializer().serialize(entry.getKey());
byte[] value = redisTemplate.getStringSerializer().serialize(entry.getValue());
hashes.put(key, value);
}
// 批量保存
connection.hMSet(hashName, hashes);
}
return null;
}
});
}

/**
 * 保存多个哈希表(HashMap)(Redis键名不可以重复)
 *
 * @param dataMap Map<Redis键名,Map<哈希键,哈希值>>
 */
public static void batchHashMapSet(Map<String, Map<String, String>> dataMap) {
// 设置5秒超时时间
redisTemplate.expire("max", 25, TimeUnit.SECONDS);
redisTemplate.executePipelined(new RedisCallback<List<Map<String, String>>>() {

@Override
public List<Map<String, String>> doInRedis(RedisConnection connection) throws DataAccessException {
Iterator<Map.Entry<String, Map<String, String>>> iterator = dataMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String, Map<String, String>> hash = iterator.next();
// 哈希名,即表名
byte[] hashName = redisTemplate.getStringSerializer().serialize(hash.getKey());
Map<String, String> hashValues = hash.getValue();
Iterator<Map.Entry<String, String>> it = hashValues.entrySet().iterator();
// 将元素序列化后缓存,即表的多条哈希记录
Map<byte[], byte[]> hashes = new HashMap<byte[], byte[]>();
while (it.hasNext()) {
// hash中一条key-value记录
Map.Entry<String, String> entry = it.next();
byte[] key = redisTemplate.getStringSerializer().serialize(entry.getKey());
byte[] value = redisTemplate.getStringSerializer().serialize(entry.getValue());
hashes.put(key, value);
}
// 批量保存
connection.hMSet(hashName, hashes);
}
return null;
}
});
}

/**
 * 保存多个哈希表(HashMap)列表(哈希map的Redis键名不能重复)
 *
 * @param list Map<Redis键名,Map<哈希键,哈希值>>
 * @see RedisUtils*.batchHashMapSet()*
 */
public static void batchHashMapListSet(List<Map<String, Map<String, String>>> list) {
// 设置5秒超时时间
redisTemplate.expire("max", 25, TimeUnit.SECONDS);
redisTemplate.executePipelined(new RedisCallback<List<Map<String, String>>>() {

@Override
public List<Map<String, String>> doInRedis(RedisConnection connection) throws DataAccessException {
for (Map<String, Map<String, String>> dataMap : list) {
Iterator<Map.Entry<String, Map<String, String>>> iterator = dataMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String, Map<String, String>> hash = iterator.next();
// 哈希名,即表名
byte[] hashName = redisTemplate.getStringSerializer().serialize(hash.getKey());
Map<String, String> hashValues = hash.getValue();
Iterator<Map.Entry<String, String>> it = hashValues.entrySet().iterator();
// 将元素序列化后缓存,即表的多条哈希记录
Map<byte[], byte[]> hashes = new HashMap<byte[], byte[]>();
while (it.hasNext()) {
// hash中一条key-value记录
Map.Entry<String, String> entry = it.next();
byte[] key = redisTemplate.getStringSerializer().serialize(entry.getKey());
byte[] value = redisTemplate.getStringSerializer().serialize(entry.getValue());
hashes.put(key, value);
}
// 批量保存
connection.hMSet(hashName, hashes);
}
}
return null;
}
});
}

}

五、创建接口测试

TestRestController增加接口/testredis
    @RequestMapping(value = "/testredis", method = RequestMethod.GET)
    public WebResult testRedis() {
        RedisUtils.set("test","aaaaa");
        return WebResult.ok(RedisUtils.get("test"));
    }


原文地址:https://blog.csdn.net/weixin_41647530/article/details/143332368

免责声明:本站文章内容转载自网络资源,如本站内容侵犯了原著者的合法权益,可联系本站删除。更多内容请关注自学内容网(zxcms.com)!