diff --git a/lyapi/cache/Cache.php b/lyapi/cache/Cache.php
new file mode 100644
index 0000000000000000000000000000000000000000..3f933adbd665b26cfaa6757697512c85c512426f
--- /dev/null
+++ b/lyapi/cache/Cache.php
@@ -0,0 +1,56 @@
+<?php
+
+
+namespace LyApi\cache;
+
+
+interface Cache
+{
+
+    /**
+     * 初始化缓存设置.
+     */
+    public function __construct($group = null);
+
+    /**
+     * 获取一个缓存值.
+     *
+     * @param string $key 键名
+     *
+     * @return boolean
+     */
+    public function set($key, $data, $expire = 0);
+
+    /**
+     * 获取一个缓存值.
+     *
+     * @param string $key 键名
+     *
+     * @return string
+     */
+    public function get($key);
+
+    /**
+     * 判断一个缓存键是否存在.
+     *
+     * @param string $key 键名
+     *
+     * @return boolean
+     */
+    public function has($key);
+
+    /**
+     * 删除一个缓存键.
+     *
+     * @param string $key 键名
+     *
+     * @return boolean
+     */
+    public function delete($key);
+
+    /**
+     * 清空所有缓存.
+     */
+    public function clean();
+
+}
\ No newline at end of file
diff --git a/lyapi/cache/FileCache.php b/lyapi/cache/FileCache.php
index 6213e3d3af9f9f5a19737bbd9e0c088db4c33b01..745347dbef22e2ec2b3eebfd83c3984ab7977bb7 100644
--- a/lyapi/cache/FileCache.php
+++ b/lyapi/cache/FileCache.php
@@ -2,9 +2,13 @@
 
 namespace LyApi\cache;
 
-class FileCache
+class FileCache implements Cache
 {
     private $dir;
+
+    /**
+     * 初始化缓存设置.
+     */
     public function __construct($group = null)
     {
         if (is_null($group)) {
@@ -19,6 +23,15 @@ class FileCache
         $this->dir = $dir;
     }
 
+    /**
+     * 设置一个缓存值.
+     *
+     * @param string $key 键名
+     * @param string $data 数据
+     * @param string $expire 过期时间
+     *
+     * @return boolean
+     */
     public function set($key, $data, $expire = 0)
     {
         $filename = $this->dir . '/' . md5($key) . '.lyc';
@@ -43,6 +56,13 @@ class FileCache
         }
     }
 
+    /**
+     * 获取一个缓存值.
+     *
+     * @param string $key 键名
+     *
+     * @return string
+     */
     public function get($key)
     {
         $filename = $this->dir . '/' . md5($key) . '.lyc';
@@ -63,6 +83,13 @@ class FileCache
         }
     }
 
+    /**
+     * 判断一个缓存键是否存在.
+     *
+     * @param string $key 键名
+     *
+     * @return boolean
+     */
     public function has($key)
     {
         if ($this->get($key) == '') {
@@ -72,12 +99,24 @@ class FileCache
         }
     }
 
+
+    /**
+     * 删除一个缓存键.
+     *
+     * @param string $key 键名
+     *
+     * @return boolean
+     */
     public function delete($key)
     {
         $filename = $this->dir . '/' . md5($key) . '.lyc';
         return @unlink($filename);
     }
 
+
+    /**
+     * 清空所有缓存.
+     */
     public function clean()
     {
         $dirs = scandir($this->dir);
diff --git a/lyapi/cache/RedisCache.php b/lyapi/cache/RedisCache.php
index 3d1c4661fbb8c3cc1533c05528aa67c353afddc4..76b28c95d48fd147cae0ac2664702e002b09f31a 100644
--- a/lyapi/cache/RedisCache.php
+++ b/lyapi/cache/RedisCache.php
@@ -2,9 +2,69 @@
 
 namespace LyApi\cache;
 
-use Predis\Client;
+use Predis;
 
-class RedisCache extends Client
+class RedisCache implements Cache
 {
-    // 待编写 ....
+    private $client;
+
+    private $group;
+
+    public function __construct($group = null)
+    {
+        Predis\Autoloader::register();
+
+        $this->client = new Predis\Client('tcp://127.0.0.1:6379');
+
+        $this->group = 'cache'.$group;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function set($key, $data, $expire = 0)
+    {
+        if($expire == 0)
+            return $this->client->set($this->group.$key,$data);
+        else
+            return $this->client->setex($this->group.$key,$expire,$data);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function get($key)
+    {
+        return $this->client->get($this->group.$key);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function has($key)
+    {
+        return $this->client->exists($this->group.$key);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function delete($key)
+    {
+        return $this->client->del($this->group.$key);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function clean()
+    {
+            $keys = $this->client->keys($this->group . '*');
+
+            foreach ($keys as $key) {
+                $this->delete($key);
+            }
+
+            return true;
+    }
 }