Memcached 简明教程
Memcached - Delete data
Memcached delete 命令用于从 Memcached 服务器中删除现有密钥。
Memcached delete command is used to delete an existing key from the Memcached server.
Syntax
Memcached delete 命令的基本语法如下所示：
The basic syntax of Memcached delete command is as shown below −
delete key如果成功删除该密钥，则它将返回 DELETED。如果未找到该密钥，则它将返回 NOT_FOUND，否则将返回 ERROR。
If the key is successfully deleted, then it returns DELETED. If the key is not found, then it returns NOT_FOUND, otherwise it returns ERROR.
Example
在此示例中，我们使用 tutorialspoint 作为密钥，并将 memcached 存储在其中，其到期时间为 900 秒。此后，它将删除存储的密钥。
In this example, we use tutorialspoint as a key and store memcached in it with an expiration time of 900 seconds. After this, it deletes the stored key.
set tutorialspoint 0 900 9
memcached
STORED
get tutorialspoint
VALUE tutorialspoint 0 9
memcached
END
delete tutorialspoint
DELETED
get tutorialspoint
END
delete tutorialspoint
NOT_FOUNDDelete Data Using Java Application
若要从 Memcached 服务器删除数据，您需要使用 Memcached delete 方法。
To delete data from a Memcached server, you need to use the Memcached delete method.
Example
import net.spy.memcached.MemcachedClient;
public class MemcachedJava {
public static void main(String[] args) {
// Connecting to Memcached server on localhost
MemcachedClient mcc = new MemcachedClient(new
InetSocketAddress("127.0.0.1", 11211));
System.out.println("Connection to server successful");
System.out.println("set status:"+mcc.set("tutorialspoint", 900, "memcached").done);
// Get value from cache
System.out.println("Get from Cache:"+mcc.get("tutorialspoint"));
// delete value from cache
System.out.println("Delete from Cache:"+mcc.delete("tutorialspoint").isDone());
// check whether value exists or not
System.out.println("Get from Cache:"+mcc.get("tutorialspoint"));
}
}