spring-redis 存储数据

package com.fndsoft.bcis.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Service;

import java.util.*;

/**
* redis缓存帮助类
* Created by DELL on 2016/5/23.
*/
@Service
public class RedisCacheUtil<T> {

@Autowired
public RedisTemplate redisTemplate;

/**
* 缓存基本的对象，Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
* @return 缓存的对象
*/
public <T> ValueOperations<String, T> setCacheObject(String key, T value) {
ValueOperations<String, T> operation = redisTemplate.opsForValue();
operation.set(key, value);
return operation;
}

/**
* 获得缓存的基本对象。
*
* @param key 缓存键值
* @return 缓存键值对应的数据
*/
public <T> T getCacheObject(String key) {
ValueOperations<String, T> operation = redisTemplate.opsForValue();
return operation.get(key);
}

/**
* 缓存List数据
*
* @param key 缓存的键值
* @param dataList 待缓存的List数据
* @return 缓存的对象
*/
public <T> ListOperations<String, T> setCacheList(String key, List<T> dataList) {
ListOperations listOperation = redisTemplate.opsForList();
if (null != dataList) {
int size = dataList.size();
for (int i = 0; i < size; i++) {
listOperation.leftPush(key, dataList.get(i));
}
}
return listOperation;
}

/**
* 获得缓存的list对象
*
* @param key 缓存的键值
* @return 缓存键值对应的数据
*/
public <T> List<T> getCacheList(String key) {
List<T> dataList = new ArrayList<T>();
ListOperations<String, T> listOperation = redisTemplate.opsForList();
Long size = listOperation.size(key);

for (int i = 0; i < size; i++) {
dataList.add(listOperation.index(key,i));
}
return dataList;
}

/**
* 缓存Set
*
* @param key 缓存键值
* @param dataSet 缓存的数据
* @return 缓存数据的对象
*/
public <T> BoundSetOperations<String, T> setCacheSet(String key, Set<T> dataSet) {
BoundSetOperations<String, T> setOperation = redisTemplate.boundSetOps(key);
Iterator<T> it = dataSet.iterator();
while (it.hasNext()) {
setOperation.add(it.next());
}
return setOperation;
}

/**
* 获得缓存的set
*
* @param key
* @return
*/
public Set<T> getCacheSet(String key) {
Set<T> dataSet = new HashSet<T>();
BoundSetOperations<String, T> operation = redisTemplate.boundSetOps(key);
Long size = operation.size();
for (int i = 0; i < size; i++) {
dataSet.add(operation.pop());
}
return dataSet;
}

/**
* 缓存Map
*
* @param key
* @param dataMap
* @return
*/
public <T> HashOperations<String, String, T> setCacheMap(String key, Map<String, T> dataMap) {

HashOperations hashOperations = redisTemplate.opsForHash();
if (null != dataMap) {
for (Map.Entry<String, T> entry : dataMap.entrySet()) {
hashOperations.put(key, entry.getKey(), entry.getValue());
}
}
return hashOperations;
}

/**
* 获得缓存的Map
*
* @param key
* @return
*/
public <T> Map<String, T> getCacheMap(String key) {
Map<String, T> map = redisTemplate.opsForHash().entries(key);
return map;
}

/**
* 缓存Map
*
* @param key
* @param dataMap
* @return
*/
public <T> HashOperations<String, Integer, T> setCacheIntegerMap(String key, Map<Integer, T> dataMap) {
HashOperations hashOperations = redisTemplate.opsForHash();
if (null != dataMap) {
for (Map.Entry<Integer, T> entry : dataMap.entrySet()) {
hashOperations.put(key, entry.getKey(), entry.getValue());
}
}
return hashOperations;
}

/**
* 获得缓存的Map
*
* @param key
* @return
*/
public <T> Map<Integer, T> getCacheIntegerMap(String key) {
Map<Integer, T> map = redisTemplate.opsForHash().entries(key);
return map;
}
}

以下是存储list对象的测试方法：

/**
* redis缓存list对象
*/
@Test
public void setCatchValueForList() {
String key = "user_Test7";
List<Code> codeList = new ArrayList<>();
Code code1 = new Code("436436", 533);
Code code2 = new Code("214214", 53453);
codeList.add(code1);
codeList.add(code2);
redisCacheUtil.setCacheList(key, codeList);
System.out.println("保存数据成功！");
}

@Test
public void getValueForList() {
String key = "user_Test7";
List<Code> codeList = redisCacheUtil.getCacheList(key);
for (Code code : codeList) {
System.out.println(code.getName() + " " + code.getAge());
}
}

切记被缓存的实例化对象必须系列化：

public class Code implements Serializable {}

另外还可以对将要保存的key设置有效时间，超过此有效时间，该key会自动删除失效：

redisTemplate.expire(key, 1, TimeUnit.HOURS);//此处TimeUnit.HOURS设置有效时长的单位为小时

转自:https://www.cnblogs.com/baizhanshi/p/5527467.html