public void putStringByKey(final String key, final String value) {
redisTemplate.execute(
new RedisCallback<String>() {
@Override
public String doInRedis(RedisConnection connection) throws DataAccessException {
connection.set(key.getBytes(), value.getBytes());
return null;
}
});
}
// String数据类型 存储一对键值 仅支持value为String类型
public void setString(final String key, final String value) {
redisTemplate.execute(
new RedisCallback<Serializable>() {
public Serializable doInRedis(RedisConnection connection) throws DataAccessException {
connection.set(
redisTemplate.getStringSerializer().serialize(key),
redisTemplate.getStringSerializer().serialize(value));
return null;
}
});
}
public String getStringByKey(final String key) {
return redisTemplate.execute(
new RedisCallback<String>() {
@Override
public String doInRedis(RedisConnection connection) throws DataAccessException {
if (connection.exists(key.getBytes())) {
return new String(connection.get(key.getBytes()));
}
return null;
}
});
}
public boolean setnx(final String key, final String value, Long expireTime) {
Boolean result =
redisTemplate.execute(
new RedisCallback<Boolean>() {
@Override
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
return connection.setNX(key.getBytes(), value.getBytes());
}
});
if (result) redisTemplate.expire(key, expireTime, TimeUnit.MILLISECONDS);
return result;
}
@Override
public boolean setExpireTime(final Object key, final long time) {
return template.execute(
new RedisCallback<Boolean>() {
@Override
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
RedisSerializer<String> serializer = template.getStringSerializer();
byte[] serializerKey = serializer.serialize((String) key);
return connection.expire(serializerKey, time);
}
});
}
@Override
public void clean() {
// dangerous
template.execute(
new RedisCallback<Object>() {
@Override
public Object doInRedis(RedisConnection connection) throws DataAccessException {
connection.flushDb();
return null;
}
},
true);
}
/**
* String数据类型 读取键为key的值仅支持value为String类型
*
* @param key
* @return 字符串
*/
public Serializable getString(final String key) {
return redisTemplate.execute(
new RedisCallback<Serializable>() {
@Override
public Serializable doInRedis(RedisConnection connection) throws DataAccessException {
byte[] byteKey = redisTemplate.getStringSerializer().serialize(key);
if (connection.exists(byteKey)) {
byte[] value = connection.get(byteKey);
String strValue = redisTemplate.getStringSerializer().deserialize(value);
return strValue;
}
return null;
}
});
}
@Override
public boolean existKey(final Object key) {
return template.execute(
new RedisCallback<Boolean>() {
@Override
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
byte[] k = null;
if (template.getKeySerializer() == null && key instanceof byte[]) {
k = (byte[]) key;
} else {
// 强耦合了Redis本地的Serial方法
StringRedisSerializer strRedisSer = new StringRedisSerializer();
k = strRedisSer.serialize((String) key);
}
return connection.exists(k);
}
},
true);
}
