diff --git a/rest/bean.go b/rest/bean.go
index 4635c3f..a730455 100644
--- a/rest/bean.go
+++ b/rest/bean.go
@@ -8,6 +8,8 @@ import (
 type IBean interface {
 	//初始化方法
 	Init()
+	//系统清理方法
+	Cleanup()
 	//所有配置都加载完成后调用的方法，包括数据库加载完毕
 	ConfigPost()
 	//快速的Panic方法
@@ -26,6 +28,11 @@ func (this *Bean) ConfigPost() {
 
 }
 
+//系统大清理，一般时产品即将上线时，清除脏数据，只执行一次。
+func (this *Bean) Cleanup() {
+
+}
+
 //处理错误的统一方法 可以省去if err!=nil 这段代码
 func (this *Bean) PanicError(err error) {
 	if err != nil {
diff --git a/rest/context.go b/rest/context.go
index 4ec4e99..eda2344 100644
--- a/rest/context.go
+++ b/rest/context.go
@@ -137,6 +137,7 @@ func (this *Context) registerBeans() {
 
 	//session
 	this.registerBean(new(SessionDao))
+	this.registerBean(new(SessionService))
 
 	//uploadToken
 	this.registerBean(new(UploadTokenDao))
diff --git a/rest/dashboard_dao.go b/rest/dashboard_dao.go
index 7c9ee88..8c16585 100644
--- a/rest/dashboard_dao.go
+++ b/rest/dashboard_dao.go
@@ -110,3 +110,10 @@ func (this *DashboardDao) ActiveIpTop10() []*DashboardIpTimes {
 
 	return dashboardIpTimes
 }
+
+//执行清理操作
+func (this *DashboardDao) Cleanup() {
+	this.logger.Info("[DashboardDao]执行清理：清除数据库中所有Dashboard记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(Dashboard{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/download_token_dao.go b/rest/download_token_dao.go
index 0c2ca28..9993932 100644
--- a/rest/download_token_dao.go
+++ b/rest/download_token_dao.go
@@ -58,3 +58,10 @@ func (this *DownloadTokenDao) Save(downloadToken *DownloadToken) *DownloadToken
 
 	return downloadToken
 }
+
+//执行清理操作
+func (this *DownloadTokenDao) Cleanup() {
+	this.logger.Info("[DownloadTokenDao]执行清理：清除数据库中所有DownloadToken记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(DownloadToken{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/footprint_dao.go b/rest/footprint_dao.go
index cd9408b..a32d320 100644
--- a/rest/footprint_dao.go
+++ b/rest/footprint_dao.go
@@ -118,3 +118,10 @@ func (this *FootprintDao) AvgCostBetweenTime(startTime time.Time, endTime time.T
 	return int64(cost)
 }
 
+
+//执行清理操作
+func (this *FootprintDao) Cleanup() {
+	this.logger.Info("[FootprintDao]执行清理：清除数据库中所有Footprint记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(Footprint{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/image_cache_dao.go b/rest/image_cache_dao.go
index d8cb95f..c81f7e1 100644
--- a/rest/image_cache_dao.go
+++ b/rest/image_cache_dao.go
@@ -197,3 +197,12 @@ func (this *ImageCacheDao) SizeBetweenTime(startTime time.Time, endTime time.Tim
 	row.Scan(&size)
 	return size
 }
+
+
+//执行清理操作
+func (this *ImageCacheDao) Cleanup() {
+	this.logger.Info("[ImageCacheDao]执行清理：清除数据库中所有ImageCache记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(ImageCache{})
+	this.PanicError(db.Error)
+}
+
diff --git a/rest/matter_dao.go b/rest/matter_dao.go
index 4bc433b..96ac988 100644
--- a/rest/matter_dao.go
+++ b/rest/matter_dao.go
@@ -246,7 +246,6 @@ func (this *MatterDao) Delete(matter *Matter) {
 		//从磁盘中删除该文件夹。
 		DeleteEmptyDir(matter.AbsolutePath())
 
-
 	} else {
 
 		//删除数据库中文件记录
@@ -287,3 +286,14 @@ func (this *MatterDao) SizeBetweenTime(startTime time.Time, endTime time.Time) i
 	this.PanicError(err)
 	return size
 }
+
+//执行清理操作
+func (this *MatterDao) Cleanup() {
+	this.logger.Info("[MatterDao]执行清理：清除数据库中所有Matter记录。删除磁盘中所有Matter文件。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(Matter{})
+	this.PanicError(db.Error)
+
+	err := os.RemoveAll(CONFIG.MatterPath)
+	this.PanicError(err)
+
+}
diff --git a/rest/matter_service.go b/rest/matter_service.go
index 224958c..3c9b26f 100644
--- a/rest/matter_service.go
+++ b/rest/matter_service.go
@@ -159,6 +159,9 @@ func (this *MatterService) Upload(file multipart.File, user *User, puuid string,
 	fileAbsolutePath := dirAbsolutePath + "/" + filename
 	fileRelativePath := dirRelativePath + "/" + filename
 
+	//创建父文件夹
+	MakeDirAll(fileAbsolutePath)
+
 	//如果文件已经存在了，那么直接覆盖。
 	exist, err := PathExists(fileAbsolutePath)
 	this.PanicError(err)
diff --git a/rest/preference_controller.go b/rest/preference_controller.go
index a1b046c..22f10b3 100644
--- a/rest/preference_controller.go
+++ b/rest/preference_controller.go
@@ -35,16 +35,17 @@ func (this *PreferenceController) RegisterRoutes() map[string]func(writer http.R
 	//每个Controller需要主动注册自己的路由。
 	routeMap["/api/preference/fetch"] = this.Wrap(this.Fetch, USER_ROLE_GUEST)
 	routeMap["/api/preference/edit"] = this.Wrap(this.Edit, USER_ROLE_ADMINISTRATOR)
+	routeMap["/api/preference/system_cleanup"] = this.Wrap(this.SystemCleanup, USER_ROLE_ADMINISTRATOR)
+
 	return routeMap
 }
 
 //查看某个偏好设置的详情。
 func (this *PreferenceController) Fetch(writer http.ResponseWriter, request *http.Request) *WebResult {
 
-	preference := this.preferenceDao.Fetch()
+	preference := this.preferenceService.Fetch()
 
 	return this.Success(preference)
-
 }
 
 //修改
@@ -76,5 +77,25 @@ func (this *PreferenceController) Edit(writer http.ResponseWriter, request *http
 
 	preference = this.preferenceDao.Save(preference)
 
+	//重置缓存中的偏好
+	this.preferenceService.Reset()
+
 	return this.Success(preference)
 }
+
+//清扫系统，所有数据全部丢失。一定要非常慎点，非常慎点！只在系统初始化的时候点击！
+func (this *PreferenceController) SystemCleanup(writer http.ResponseWriter, request *http.Request) *WebResult {
+
+	user := this.checkUser(writer, request)
+	password := request.FormValue("password")
+
+	if !MatchBcrypt(password, user.Password) {
+		this.PanicBadRequest("密码错误，不能执行！")
+	}
+
+	for _, bean := range CONTEXT.BeanMap {
+		bean.Cleanup()
+	}
+
+	return this.Success("OK")
+}
diff --git a/rest/preference_dao.go b/rest/preference_dao.go
index 24c9b31..a992f96 100644
--- a/rest/preference_dao.go
+++ b/rest/preference_dao.go
@@ -17,7 +17,7 @@ func (this *PreferenceDao) Fetch() *Preference {
 	db := CONTEXT.DB.First(preference)
 	if db.Error != nil {
 
-		if db.Error.Error() == "record not found" {
+		if db.Error.Error() == DB_ERROR_NOT_FOUND {
 			preference.Name = "蓝眼云盘"
 			preference.ShowAlien = true
 			this.Create(preference)
@@ -25,7 +25,6 @@ func (this *PreferenceDao) Fetch() *Preference {
 		} else {
 			return nil
 		}
-
 	}
 
 	return preference
@@ -54,3 +53,12 @@ func (this *PreferenceDao) Save(preference *Preference) *Preference {
 
 	return preference
 }
+
+
+//执行清理操作
+func (this *PreferenceDao) Cleanup() {
+
+	this.logger.Info("[PreferenceDao]执行清理：清除数据库中所有Preference记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(Preference{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/preference_service.go b/rest/preference_service.go
index 3fa6914..e12c6de 100644
--- a/rest/preference_service.go
+++ b/rest/preference_service.go
@@ -4,6 +4,7 @@ package rest
 type PreferenceService struct {
 	Bean
 	preferenceDao *PreferenceDao
+	preference    *Preference
 }
 
 //初始化方法
@@ -17,3 +18,28 @@ func (this *PreferenceService) Init() {
 	}
 
 }
+
+//获取单例的配置。
+func (this *PreferenceService) Fetch() *Preference {
+
+	if this.preference == nil {
+		this.preference = this.preferenceDao.Fetch()
+	}
+
+	return this.preference
+}
+
+//清空单例配置。
+func (this *PreferenceService) Reset() {
+
+	this.preference = nil
+
+}
+
+//执行清理操作
+func (this *PreferenceService) Cleanup() {
+
+	this.logger.Info("[PreferenceService]执行清理：重置缓存中的preference。")
+
+	this.Reset()
+}
diff --git a/rest/session_dao.go b/rest/session_dao.go
index 570777a..e89841a 100644
--- a/rest/session_dao.go
+++ b/rest/session_dao.go
@@ -10,14 +10,6 @@ type SessionDao struct {
 	BaseDao
 }
 
-//构造函数
-func NewSessionDao() *SessionDao {
-
-	var sessionDao = &SessionDao{}
-	sessionDao.Init()
-	return sessionDao
-}
-
 //按照Id查询session.
 func (this *SessionDao) FindByUuid(uuid string) *Session {
 
@@ -78,3 +70,9 @@ func (this *SessionDao) Delete(uuid string) {
 }
 
 
+//执行清理操作
+func (this *SessionDao) Cleanup() {
+	this.logger.Info("[SessionDao]执行清理：清除数据库中所有Session记录。")
+	db := CONTEXT.DB.Where("uuid is not null").Delete(Session{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/session_service.go b/rest/session_service.go
new file mode 100644
index 0000000..bb39541
--- /dev/null
+++ b/rest/session_service.go
@@ -0,0 +1,33 @@
+package rest
+
+//@Service
+type SessionService struct {
+	Bean
+	userDao    *UserDao
+	sessionDao *SessionDao
+}
+
+//初始化方法
+func (this *SessionService) Init() {
+	this.Bean.Init()
+
+	//手动装填本实例的Bean. 这里必须要用中间变量方可。
+	b := CONTEXT.GetBean(this.userDao)
+	if b, ok := b.(*UserDao); ok {
+		this.userDao = b
+	}
+
+	b = CONTEXT.GetBean(this.sessionDao)
+	if b, ok := b.(*SessionDao); ok {
+		this.sessionDao = b
+	}
+
+}
+
+//执行清理操作
+func (this *SessionService) Cleanup() {
+
+	this.logger.Info("[SessionService]执行清理：清除缓存中所有Session记录，共%d条。", CONTEXT.SessionCache.Count())
+
+	CONTEXT.SessionCache.Truncate()
+}
diff --git a/rest/user_dao.go b/rest/user_dao.go
index 04c81b7..31f2120 100644
--- a/rest/user_dao.go
+++ b/rest/user_dao.go
@@ -1,7 +1,6 @@
 package rest
 
 import (
-
 	"github.com/nu7hatch/gouuid"
 	"time"
 )
@@ -138,3 +137,10 @@ func (this *UserDao) Save(user *User) *User {
 	this.PanicError(db.Error)
 	return user
 }
+
+//执行清理操作
+func (this *UserDao) Cleanup() {
+	this.logger.Info("[UserDao]执行清理：清除数据库中所有User记录。")
+	db := CONTEXT.DB.Where("uuid is not null and role != ?", USER_ROLE_ADMINISTRATOR).Delete(User{})
+	this.PanicError(db.Error)
+}
diff --git a/rest/web_result.go b/rest/web_result.go
index da92487..c0b1e73 100644
--- a/rest/web_result.go
+++ b/rest/web_result.go
@@ -94,5 +94,5 @@ var (
 	DB_ERROR_DUPLICATE_KEY  = "Error 1062: Duplicate entry"
 	DB_ERROR_NOT_FOUND      = "record not found"
 	DB_TOO_MANY_CONNECTIONS = "Error 1040: Too many connections"
-	DB_BAD_CONNECTION       = "driver: bad connection"
+	DB_BAD_CONNECTION = "driver: bad connection"
 )