在对接微信支付的一系列流程中,涉及秒杀场景,所以有引入redis的队列机制,下面附上SSM整合Reids的代码
SSM接入Redis基本结构
配置pom.xml文件
org.springframework.data
spring-data-redis
1.8.6.RELEASE
redis.clients
jedis
2.9.0
web.xml
contextConfigLocation
classpath*:applicationContext.xml,classpath*:spring-redis.xml
redis.properties
redis.host=127.0.0.1
redis.port=6379
redis.sentinel.port=26879
redis.pwd=
redis.database=0
#逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
redis.pool.timeBetweenEvictionRunsMillis=30000
redis.pool.testOnBorrow=true
# 连接超时时间
redis.timeout=1000
redis.userPool=true
#最大空闲数
redis.pool.maxIdle=100
redis.pool.minIdle=10
#控制一个pool可分配多少个jedis实例,用来替换上面的redis.maxActive,如果是jedis 2.4以后用该属性
redis.pool.maxTotal=200
#最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。
redis.pool.maxWaitMillis=10000
#连接的最小空闲时间 默认1800000毫秒(30分钟)
redis.pool.minEvictableIdleTimeMillis=300000
#每次释放连接的最大数目,默认3
redis.pool.numTestsPerEvictionRun=10
redis.pool.testOnReturn=true
redis.pool.testWhileIdle=true
spring-redis.xml
CacheContextUtil.java
package com.shadmin.common.util;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
* Context 工具类
*/
@SuppressWarnings("static-access")
@Component
public class CacheContextUtil implements ApplicationContextAware {
private static ApplicationContext commonApplicationContext;
@Override
public void setApplicationContext(ApplicationContext context) throws BeansException {
this.commonApplicationContext = context;
}
/**
* * 根据提供的bean名称得到相应的服务类
* * @param beanId bean的id
* * @return 返回bean的实例对象
*
*/
public static Object getBean(String beanId) {
return commonApplicationContext.getBean(beanId);
}
/**
* * 根据提供的bean名称得到对应于指定类型的服务类
* * @param beanId bean的id
* * @param clazz bean的类类型
* * @return 返回的bean类型,若类型不匹配,将抛出异常
*
*/
public static T getBean(String beanId, Class clazz) {
return commonApplicationContext.getBean(beanId, clazz);
}
}
RedisUtil.java
package com.shadmin.common.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import java.util.*;
import java.util.concurrent.TimeUnit;
/**
* redis工具类
*
*/
@SuppressWarnings("unchecked")
public class RedisUtil {
private static final Logger LOG = LoggerFactory.getLogger(RedisUtil.class);
private static RedisTemplate redisTemplate = CacheContextUtil.getBean("redisTemplate", RedisTemplate.class);
private static StringRedisTemplate stringRedisTemplate = CacheContextUtil.getBean("stringRedisTemplate", StringRedisTemplate.class);
private static String CACHE_PREFIX;
private static boolean CACHE_CLOSED;
private RedisUtil() {
}
@SuppressWarnings("rawtypes")
private static boolean isEmpty(Object obj) {
if (obj == null) {
return true;
}
if (obj instanceof String) {
String str = obj.toString();
if ("".equals(str.trim())) {
return true;
}
return false;
}
if (obj instanceof List) {
List list = (List) obj;
if (list.isEmpty()) {
return true;
}
return false;
}
if (obj instanceof Map) {
Map map = (Map) obj;
if (map.isEmpty()) {
return true;
}
return false;
}
if (obj instanceof Set) {
Set set = (Set) obj;
if (set.isEmpty()) {
return true;
}
return false;
}
if (obj instanceof Object[]) {
Object[] objs = (Object[]) obj;
if (objs.length <= 0) {
return true;
}
return false;
}
return false;
}
/**
* 构建缓存key值
* @param key 缓存key
* @return
*/
private static String buildKey(String key) {
if (CACHE_PREFIX == null || "".equals(CACHE_PREFIX)) {
return key;
}
return CACHE_PREFIX + ":" + key;
}
/**
* 返回缓存的前缀
* @return CACHE_PREFIX_FLAG
*/
public static String getCachePrefix() {
return CACHE_PREFIX;
}
/**
* 设置缓存的前缀
* @param cachePrefix
*/
public static void setCachePrefix(String cachePrefix) {
if (cachePrefix != null && !"".equals(cachePrefix.trim())) {
CACHE_PREFIX = cachePrefix.trim();
}
}
/**
* 关闭缓存
* @return true:成功
* false:失败
*/
public static boolean close() {
LOG.debug(" cache closed ! ");
CACHE_CLOSED = true;
return true;
}
/**
* 打开缓存
* @return true:存在
* false:不存在
*/
public static boolean openCache() {
CACHE_CLOSED = false;
return true;
}
/**
* 检查缓存是否开启
* @return true:已关闭
* false:已开启
*/
public static boolean isClose() {
return CACHE_CLOSED;
}
/**
* 判断key值是否存在
* @param key 缓存的key
* @return true:存在
* false:不存在
*/
public static boolean hasKey(String key) {
LOG.debug(" hasKey key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return false;
}
key = buildKey(key);
return redisTemplate.hasKey(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 匹配符合正则的key
* @param patternKey
* @return key的集合
*/
public static Set keys(String patternKey) {
LOG.debug(" keys key :{}", patternKey);
try {
if (isClose() || isEmpty(patternKey)) {
return Collections.emptySet();
}
return redisTemplate.keys(patternKey);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return Collections.emptySet();
}
/**
* 根据key删除缓存
* @param key
* @return true:成功
* false:失败
*/
public static boolean del(String... key) {
LOG.debug(" delete key :{}", key.toString());
try {
if (isClose() || isEmpty(key)) {
return false;
}
Set keySet = new HashSet<>();
for (String str : key) {
keySet.add(buildKey(str));
}
redisTemplate.delete(keySet);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 根据key删除缓存
* @param key
* @return true:成功
* false:失败
*/
public static boolean delPattern(String key) {
LOG.debug(" delete Pattern keys :{}", key);
try {
if (isClose() || isEmpty(key)) {
return false;
}
key = buildKey(key);
redisTemplate.delete(redisTemplate.keys(key));
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 删除一组key值
* @param keys
* @return true:成功
* false:失败
*/
public static boolean del(Set keys) {
LOG.debug(" delete keys :{}", keys.toString());
try {
if (isClose() || isEmpty(keys)) {
return false;
}
Set keySet = new HashSet<>();
for (String str : keys) {
keySet.add(buildKey(str));
}
redisTemplate.delete(keySet);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 设置过期时间
* @param key 缓存key
* @param seconds 过期秒数
* @return true:成功
* false:失败
*/
public static boolean setExp(String key, long seconds) {
LOG.debug(" setExp key :{}, seconds: {}", key, seconds);
try {
if (isClose() || isEmpty(key) || seconds > 0) {
return false;
}
key = buildKey(key);
return redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 查询过期时间
* @param key 缓存key
* @return 秒数
*/
public static Long getExpire(String key) {
LOG.debug(" getExpire key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return 0L;
}
key = buildKey(key);
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return 0L;
}
/**
* 缓存存入key-value
* @param key 缓存键
* @param value 缓存值
* @return true:成功
* false:失败
*/
public static boolean setString(String key, String value) {
LOG.debug(" setString key :{}, value: {}", key, value);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
stringRedisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 缓存存入key-value
* @param key 缓存键
* @param value 缓存值
* @param seconds 秒数
* @return true:成功
* false:失败
*/
public static boolean setString(String key, String value, long seconds) {
LOG.debug(" setString key :{}, value: {}, timeout:{}", key, value, seconds);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
stringRedisTemplate.opsForValue().set(key, value, seconds, TimeUnit.SECONDS);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 根据key取出String value
* @param key 缓存key值
* @return String 缓存的String
*/
public static String getString(String key) {
LOG.debug(" getString key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return stringRedisTemplate.opsForValue().get(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 去的缓存中的最大值并+1
* @param key 缓存key值
* @return long 缓存中的最大值+1
*/
public static long incr(String key) {
LOG.debug(" incr key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return 0;
}
key = buildKey(key);
return redisTemplate.opsForValue().increment(key, 1);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return 0;
}
/**
* 缓存中存入序列化的Object对象
* @param key 缓存key
* @param obj 存入的序列化对象
* @return true:成功
* false:失败
*/
public static boolean set(String key, Object obj) {
LOG.debug(" set key :{}, value:{}", key, obj);
try {
if (isClose() || isEmpty(key) || isEmpty(obj)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForValue().set(key, obj);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 缓存中存入序列化的Object对象
* @param key 缓存key
* @param obj 存入的序列化对象
* @return true:成功
* false:失败
*/
public static boolean setObj(String key, Object obj, long seconds) {
LOG.debug(" set key :{}, value:{}, seconds:{}", key, obj, seconds);
try {
if (isClose() || isEmpty(key) || isEmpty(obj)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForValue().set(key, obj);
if (seconds > 0) {
redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 取出缓存中存储的序列化对象
* @param key 缓存key
* @param clazz 对象类
* @return 序列化对象
*/
public static T getObj(String key, Class clazz) {
LOG.debug(" get key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return (T) redisTemplate.opsForValue().get(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 存入Map数组
* @param
* @param key 缓存key
* @param map 缓存map
* @return true:成功
* false:失败
*/
public static boolean setMap(String key, Map map) {
try {
if (isClose() || isEmpty(key) || isEmpty(map)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForHash().putAll(key, map);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 取出缓存的map
* @param key 缓存key
* @return map 缓存的map
*/
@SuppressWarnings("rawtypes")
public static Map getMap(String key) {
LOG.debug(" getMap key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return redisTemplate.opsForHash().entries(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 查询缓存的map的集合大小
* @param key 缓存key
* @return int 缓存map的集合大小
*/
public static long getMapSize(String key) {
LOG.debug(" getMap key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return 0;
}
key = buildKey(key);
return redisTemplate.opsForHash().size(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return 0;
}
/**
* 根据key以及hashKey取出对应的Object对象
* @param key 缓存key
* @param hashKey 对应map的key
* @return object map中的对象
*/
public static Object getMapKey(String key, String hashKey) {
LOG.debug(" getMapkey :{}, hashKey:{}", key, hashKey);
try {
if (isClose() || isEmpty(key) || isEmpty(hashKey)) {
return null;
}
key = buildKey(key);
return redisTemplate.opsForHash().get(key, hashKey);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 取出缓存中map的所有key值
* @param key 缓存key
* @return Set map的key值合集
*/
public static Set getMapKeys(String key) {
LOG.debug(" getMapKeys key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return redisTemplate.opsForHash().keys(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 删除map中指定的key值
* @param key 缓存key
* @param hashKey map中指定的hashKey
* @return true:成功
* false:失败
*/
public static boolean delMapKey(String key, String hashKey) {
LOG.debug(" delMapKey key :{}, hashKey:{}", key, hashKey);
try {
if (isClose() || isEmpty(key) || isEmpty(hashKey)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForHash().delete(key, hashKey);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 存入Map数组
* @param
* @param key 缓存key
* @param map 缓存map
* @param seconds 秒数
* @return true:成功
* false:失败
*/
public static boolean setMapExp(String key, Map map, long seconds) {
LOG.debug(" setMapExp key :{}, value: {}, seconds:{}", key, map, seconds);
try {
if (isClose() || isEmpty(key) || isEmpty(map)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForHash().putAll(key, map);
redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* map中加入新的key
* @param
* @param key 缓存key
* @param hashKey map的Key值
* @param value map的value值
* @return true:成功
* false:失败
*/
public static boolean addMap(String key, String hashKey, T value) {
LOG.debug(" addMap key :{}, hashKey: {}, value:{}", key, hashKey, value);
try {
if (isClose() || isEmpty(key) || isEmpty(hashKey) || isEmpty(value)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForHash().put(key, hashKey, value);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 缓存存入List
* @param
* @param key 缓存key
* @param list 缓存List
* @return true:成功
* false:失败
*/
public static boolean setList(String key, List list) {
LOG.debug(" setList key :{}, list: {}", key, list);
try {
if (isClose() || isEmpty(key) || isEmpty(list)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForList().leftPushAll(key, list.toArray());
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 根据key值取出对应的list合集
* @param key 缓存key
* @return List 缓存中对应的list合集
*/
public static List getList(String key) {
LOG.debug(" getList key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return (List) redisTemplate.opsForList().range(key, 0, -1);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 根据key值截取对应的list合集
* @param key 缓存key
* @param start 开始位置
* @param end 结束位置
* @return
*/
public static void trimList(String key, int start, int end) {
LOG.debug(" trimList key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return;
}
key = buildKey(key);
redisTemplate.opsForList().trim(key, start, end);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
}
/**
* 取出list合集中指定位置的对象
* @param key 缓存key
* @param index 索引位置
* @return Object list指定索引位置的对象
*/
public static Object getIndexList(String key, int index) {
LOG.debug(" getIndexList key :{}, index:{}", key, index);
try {
if (isClose() || isEmpty(key) || index < 0) {
return null;
}
key = buildKey(key);
return redisTemplate.opsForList().index(key, index);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* Object存入List右侧
* @param key 缓存key
* @param value List中的值
* @return true:成功
* false:失败
*/
public static boolean addList(String key, Object value) {
LOG.debug(" addList key :{}, value:{}", key, value);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForList().rightPush(key, value);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 删除并取出list左侧第一个元素
* @param key
* @return
*/
public static Object lpopList(String key) {
LOG.debug(" lpopList key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return redisTemplate.opsForList().leftPop(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 缓存存入List
* @param
* @param key 缓存key
* @param list 缓存List
* @param seconds 秒数
* @return true:成功
* false:失败
*/
public static boolean setList(String key, List list, long seconds) {
LOG.debug(" setList key :{}, value:{}, seconds:{}", key, list, seconds);
try {
if (isClose() || isEmpty(key) || isEmpty(list)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForList().leftPushAll(key, list.toArray());
if (seconds > 0) {
redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 查询缓存的list的集合大小
* @param key 缓存key
* @return int 缓存list的集合大小
*/
public static long getListSize(String key) {
LOG.debug(" getListSize key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return 0;
}
key = buildKey(key);
return redisTemplate.opsForList().size(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return 0;
}
/**
* set集合存入缓存
* @param
* @param key 缓存key
* @param set 缓存set集合
* @return true:成功
* false:失败
*/
public static boolean setSet(String key, Set set) {
LOG.debug(" setSet key :{}, value:{}", key, set);
try {
if (isClose() || isEmpty(key) || isEmpty(set)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForSet().add(key, set.toArray());
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* set集合中增加value
* @param key 缓存key
* @param value 增加的value
* @return true:成功
* false:失败
*/
public static boolean addSet(String key, Object value) {
LOG.debug(" addSet key :{}, value:{}", key, value);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForSet().add(key, value);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* set集合存入缓存
* @param
* @param key 缓存key
* @param set 缓存set集合
* @param seconds 秒数
* @return true:成功
* false:失败
*/
public static boolean setSet(String key, Set set, long seconds) {
LOG.debug(" setSet key :{}, value:{}, seconds:{}", key, set, seconds);
try {
if (isClose() || isEmpty(key) || isEmpty(set)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForSet().add(key, set.toArray());
if (seconds > 0) {
redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 取出缓存中对应的set合集
* @param
* @param key 缓存key
* @return Set 缓存中的set合集
*/
public static Set getSet(String key) {
LOG.debug(" getSet key :{}", key);
try {
if (isClose() || isEmpty(key)) {
return null;
}
key = buildKey(key);
return (Set) redisTemplate.opsForSet().members(key);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return null;
}
/**
* 判断set中是否包含成员
* @param key 集合
* @param member 成员
* @return
*/
public static boolean isMemSet(String key, String member) {
LOG.debug(" isMemSet key :{},member :{}", key, member);
try {
if (isClose() || isEmpty(key) || isEmpty(member)) {
return false;
}
return redisTemplate.opsForSet().isMember(key, member);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 有序集合存入数值
* @param key 缓存key
* @param value 缓存value
* @param score 评分
* @return
*/
public static boolean addZSet(String key, Object value, double score) {
LOG.debug(" addZSet key :{},value:{}, score:{}", key, value, score);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
return redisTemplate.opsForZSet().add(key, value, score);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 从有序集合中删除指定值
* @param key 缓存key
* @param value 缓存value
* @return
*/
public static boolean removeZSet(String key, Object value) {
LOG.debug(" removeZSet key :{},value:{}", key, value);
try {
if (isClose() || isEmpty(key) || isEmpty(value)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForZSet().remove(key, value);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 从有序集合中删除指定位置的值
* @param key 缓存key
* @param start 起始位置
* @param end 结束为止
* @return
*/
public static boolean removeZSet(String key, long start, long end) {
LOG.debug(" removeZSet key :{},start:{}, end:{}", key, start, end);
try {
if (isClose() || isEmpty(key)) {
return false;
}
key = buildKey(key);
redisTemplate.opsForZSet().removeRange(key, start, end);
return true;
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return false;
}
/**
* 从有序集合中获取指定位置的值
* @param key 缓存key
* @param start 起始位置
* @param end 结束为止
* @return
*/
public static Set getZSet(String key, long start, long end) {
LOG.debug(" getZSet key :{},start:{}, end:{}", key, start, end);
try {
if (isClose() || isEmpty(key)) {
return Collections.emptySet();
}
key = buildKey(key);
return (Set) redisTemplate.opsForZSet().range(key, start, end);
} catch (Exception e) {
LOG.error(e.getMessage(), e);
}
return Collections.emptySet();
}
}
参考链接
Maven整合SSM和Redis,亲测 Linux下Redis的安装、配置、注册成服务,开机自启