redis Jedis存取list对象和map

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1，redis缓存配置类

Java代码

public class RedisCache {
protected static Logger logger = Logger.getLogger(RedisCache.class);
public final static String VIRTUAL_COURSE_PREX = "_lc_vc_";
private RedisCacheConfig redisCacheConfig;
private JedisPool jedisPool = null;
public RedisCacheConfig getRedisCacheConfig() {
return redisCacheConfig;
}
public void setRedisCacheConfig(RedisCacheConfig redisCacheConfig) {
this.redisCacheConfig = redisCacheConfig;
}
public RedisCache(){
}
/**
* 初始化Redis连接池
*/
private void initialPool(){
JedisPoolConfig poolConfig = redisCacheConfig.getPoolConfig();
String[] serverArray = redisCacheConfig.getServers().split(",");
for(int i = 0; i < serverArray.length; i++){
try {
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(poolConfig.getMaxTotal());
config.setMaxIdle(poolConfig.getMaxIdle());
config.setMaxWaitMillis(poolConfig.getMaxWaitMillis());
config.setTestOnBorrow(poolConfig.getTestOnBorrow());
config.setTestOnReturn(poolConfig.getTestOnReturn());
jedisPool = new JedisPool(config, serverArray[i], redisCacheConfig.getPort(), redisCacheConfig.getTimeout());
break;
} catch (Exception e) {
logger.error("initialPool create JedisPool(" + serverArray[i] + ") error : "+e);
}
}
}
/**
* 在多线程环境同步初始化
*/
private synchronized void poolInit() {
if (jedisPool == null) {
initialPool();
}
}
/**
* 同步获取Jedis实例
* @return Jedis
*/
public synchronized Jedis getJedis() {
if (jedisPool == null) {
poolInit();
}
Jedis jedis = null;
try {
if (jedisPool != null) {
jedis = jedisPool.getResource();
jedis.auth(redisCacheConfig.getAuth());
}
} catch (Exception e) {
logger.error("Get jedis error : "+e);
e.printStackTrace();
}finally{
returnResource(jedis);
}
return jedis;
}
/**
* 释放jedis资源
* @param jedis
*/
public void returnResource(final Jedis jedis) {
if (jedis != null && jedisPool !=null) {
jedisPool.returnResource(jedis);
}
}
/**
* 得到Key
* @param key
* @return
*/
public String buildKey(String key){
return VIRTUAL_COURSE_PREX + key;
}
/**
* 设置 String
* @param key
* @param value
*/
public void setString(String key ,String value){
try {
value = StringUtil.isNullOrEmpty(value) ? "" : value;
getJedis().set(buildKey(key),value);
} catch (Exception e) {
logger.error("Set key error : "+e);
}
}
/**
* 设置过期时间
* @param key
* @param seconds 以秒为单位
* @param value
*/
public void setString(String key ,int seconds,String value){
try {
value = StringUtil.isNullOrEmpty(value) ? "" : value;
getJedis().setex(buildKey(key), seconds, value);
} catch (Exception e) {
logger.error("Set keyex error : "+e);
}
}
/**
* 获取String值
* @param key
* @return value
*/
public String getString(String key){
String bKey = buildKey(key);
if(getJedis() == null || !getJedis().exists(bKey)){
return null;
}
return getJedis().get(bKey);
}
/**
* 设置 list
* @param <T>
* @param key
* @param value
*/
public <T> void setList(String key ,List<T> list){
try {
getJedis().set(key.getBytes(),ObjectTranscoder.serialize(list));
} catch (Exception e) {
logger.error("Set key error : "+e);
}
}
/**
* 获取list
* @param <T>
* @param key
* @return list
*/
public <T> List<T> getList(String key){
String bKey = buildKey(key);
if(getJedis() == null || !getJedis().exists(key.getBytes())){
return null;
}
byte[] in = getJedis().get(key.getBytes());
List<T> list = (List<T>) ObjectTranscoder.deserialize(in);
return list;
}
/**
* 设置 map
* @param <T>
* @param key
* @param value
*/
public <T> void setMap(String key ,Map<String,T> map){
try {
getJedis().set(key.getBytes(),ObjectTranscoder.serialize(map));
} catch (Exception e) {
logger.error("Set key error : "+e);
}
}
/**
* 获取list
* @param <T>
* @param key
* @return list
*/
public <T> Map<String,T> getMap(String key){
String bKey = buildKey(key);
if(getJedis() == null || !getJedis().exists(key.getBytes())){
return null;
}
byte[] in = getJedis().get(key.getBytes());
Map<String,T> map = (Map<String, T>) ObjectTranscoder.deserialize(in);
return map;
}
}

2，spring配置

Java代码

<bean id="redisCache" class="com.cache.RedisCache" depends-on="redisCacheConfig">
<property name="redisCacheConfig" ref="redisCacheConfig"></property>
</bean>
<bean id="redisCacheConfig" class="com.able.virtualcourse.cache.RedisCacheConfig" depends-on="jedisPoolConfig">
<property name="servers"><value>${redis.servers}</value></property>
<property name="port"><value>${redis.port}</value></property>
<property name="auth"><value>${redis.auth}</value></property>
<property name="timeout"><value>${redis.pool.timeout}</value></property>
<property name="poolConfig" ref="jedisPoolConfig"></property>
</bean>
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxTotal"><value>${redis.pool.maxTotal}</value></property>
<property name="maxIdle"><value>${redis.pool.maxIdle}</value></property>
<property name="maxWaitMillis"><value>${redis.pool.maxWait}</value></property>
<property name="testOnBorrow"><value>${redis.pool.testOnBorrow}</value></property>
<property name="testOnReturn"><value>${redis.pool.testOnReturn}</value></property>
</bean>

3，序列化工具类

Java代码

public class ObjectTranscoder {
public static byte[] serialize(Object value) {
if (value == null) {
throw new NullPointerException("Can't serialize null");
}
byte[] rv=null;
ByteArrayOutputStream bos = null;
ObjectOutputStream os = null;
try {
bos = new ByteArrayOutputStream();
os = new ObjectOutputStream(bos);
os.writeObject(value);
os.close();
bos.close();
rv = bos.toByteArray();
} catch (IOException e) {
throw new IllegalArgumentException("Non-serializable object", e);
} finally {
try {
if(os!=null)os.close();
if(bos!=null)bos.close();
}catch (Exception e2) {
e2.printStackTrace();
}
}
return rv;
}
public static Object deserialize(byte[] in) {
Object rv=null;
ByteArrayInputStream bis = null;
ObjectInputStream is = null;
try {
if(in != null) {
bis=new ByteArrayInputStream(in);
is=new ObjectInputStream(bis);
rv=is.readObject();
is.close();
bis.close();
}
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
if(is!=null)is.close();
if(bis!=null)bis.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
return rv;
}
}

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