diff --git a/code/alien_controller.go b/code/alien_controller.go
index 033fe71..25bf316 100644
--- a/code/alien_controller.go
+++ b/code/alien_controller.go
@@ -6,7 +6,7 @@ import (
 	"regexp"
 	"strconv"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -130,7 +130,7 @@ func (this *AlienController) CheckRequestUser(writer http.ResponseWriter, reques
 	if user == nil {
 		panic(`邮箱或密码错误`)
 	} else {
-		if !tool.MatchBcrypt(password, user.Password) {
+		if !util.MatchBcrypt(password, user.Password) {
 			panic(`邮箱或密码错误`)
 		}
 	}
@@ -210,7 +210,7 @@ func (this *AlienController) FetchUploadToken(writer http.ResponseWriter, reques
 		Filename:   filename,
 		Privacy:    privacy,
 		Size:       size,
-		Ip:         tool.GetIpAddress(request),
+		Ip:         util.GetIpAddress(request),
 	}
 
 	uploadToken = this.uploadTokenDao.Create(uploadToken)
@@ -403,7 +403,7 @@ func (this *AlienController) FetchDownloadToken(writer http.ResponseWriter, requ
 		UserUuid:   user.Uuid,
 		MatterUuid: matterUuid,
 		ExpireTime: time.Now().Add(mm),
-		Ip:         tool.GetIpAddress(request),
+		Ip:         util.GetIpAddress(request),
 	}
 
 	downloadToken = this.downloadTokenDao.Create(downloadToken)
diff --git a/code/alien_service.go b/code/alien_service.go
index 0072cc2..c4640f9 100644
--- a/code/alien_service.go
+++ b/code/alien_service.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"net/http"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -134,7 +134,7 @@ func (this *AlienService) PreviewOrDownload(
 	}
 
 	//文件下载次数加一，为了加快访问速度，异步进行
-	go tool.SafeMethod(func() {
+	go util.SafeMethod(func() {
 		this.matterDao.TimesIncrement(uuid)
 	})
 
diff --git a/code/bean.go b/code/bean.go
index a4eb8a2..75c8599 100644
--- a/code/bean.go
+++ b/code/bean.go
@@ -5,7 +5,7 @@ import (
 	"tank/code/config"
 	"tank/code/logger"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 type IBean interface {
@@ -48,7 +48,7 @@ func (this *Bean) findUser(writer http.ResponseWriter, request *http.Request) *U
 
 	//验证用户是否已经登录。
 	//登录身份有效期以数据库中记录的为准
-	sessionId := tool.GetSessionUuidFromRequest(request, config.COOKIE_AUTH_KEY)
+	sessionId := util.GetSessionUuidFromRequest(request, config.COOKIE_AUTH_KEY)
 	if sessionId == "" {
 		return nil
 	}
diff --git a/code/cache/cache.go b/code/cache/cache.go
index 7d31b51..7b86a02 100644
--- a/code/cache/cache.go
+++ b/code/cache/cache.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"sort"
 	"sync"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -197,7 +197,7 @@ func (table *CacheTable) checkExpire() {
 	table.cleanupInterval = smallestDuration
 	if smallestDuration > 0 {
 		table.cleanupTimer = time.AfterFunc(smallestDuration, func() {
-			go tool.SafeMethod(table.checkExpire)
+			go util.SafeMethod(table.checkExpire)
 		})
 	}
 	table.Unlock()
diff --git a/code/config/config.go b/code/config/config.go
index 507b482..5ce37b0 100644
--- a/code/config/config.go
+++ b/code/config/config.go
@@ -4,7 +4,7 @@ import (
 	"github.com/json-iterator/go"
 	"io/ioutil"
 	"tank/code/logger"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 	"unsafe"
 )
@@ -133,7 +133,7 @@ func (this *Config) Init() {
 func (this *Config) ReadFromConfigFile() {
 
 	//读取配置文件
-	filePath := tool.GetConfPath() + "/tank.json"
+	filePath := util.GetConfPath() + "/tank.json"
 	content, err := ioutil.ReadFile(filePath)
 	if err != nil {
 		logger.LOGGER.Warn("无法找到配置文件：%s 即将进入安装过程！", filePath)
@@ -158,18 +158,18 @@ func (this *Config) ReadFromConfigFile() {
 
 		//使用配置项中的文件路径
 		if this.Item.MatterPath == "" {
-			this.MatterPath = tool.GetHomePath() + "/matter"
+			this.MatterPath = util.GetHomePath() + "/matter"
 		} else {
 			this.MatterPath = this.Item.MatterPath
 		}
-		tool.MakeDirAll(CONFIG.MatterPath)
+		util.MakeDirAll(CONFIG.MatterPath)
 
 		//使用配置项中的端口
 		if this.Item.ServerPort != 0 {
 			this.ServerPort = this.Item.ServerPort
 		}
 
-		this.MysqlUrl = tool.GetMysqlUrl(this.Item.MysqlPort, this.Item.MysqlHost, this.Item.MysqlSchema, this.Item.MysqlUsername, this.Item.MysqlPassword)
+		this.MysqlUrl = util.GetMysqlUrl(this.Item.MysqlPort, this.Item.MysqlHost, this.Item.MysqlSchema, this.Item.MysqlUsername, this.Item.MysqlPassword)
 		this.Installed = true
 
 		logger.LOGGER.Info("使用配置文件：%s", filePath)
diff --git a/code/dashboard_service.go b/code/dashboard_service.go
index 21321cf..6de66af 100644
--- a/code/dashboard_service.go
+++ b/code/dashboard_service.go
@@ -1,7 +1,7 @@
 package code
 
 import (
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -53,7 +53,7 @@ func (this *DashboardService) Init() {
 func (this *DashboardService) ConfigPost() {
 
 	//立即执行数据清洗任务
-	go tool.SafeMethod(this.maintain)
+	go util.SafeMethod(this.maintain)
 }
 
 //每日清洗离线数据表。
@@ -61,21 +61,21 @@ func (this *DashboardService) maintain() {
 
 	//准备好下次维护日志的时间。
 	now := time.Now()
-	nextTime := tool.FirstMinuteOfDay(tool.Tomorrow())
+	nextTime := util.FirstMinuteOfDay(util.Tomorrow())
 	duration := nextTime.Sub(now)
-	this.logger.Info("每日数据汇总，下次时间：%s ", tool.ConvertTimeToDateTimeString(nextTime))
+	this.logger.Info("每日数据汇总，下次时间：%s ", util.ConvertTimeToDateTimeString(nextTime))
 	this.maintainTimer = time.AfterFunc(duration, func() {
-		go tool.SafeMethod(this.maintain)
+		go util.SafeMethod(this.maintain)
 	})
 
 	//准备日期开始结尾
-	startTime := tool.FirstSecondOfDay(tool.Yesterday())
-	endTime := tool.LastSecondOfDay(tool.Yesterday())
-	dt := tool.ConvertTimeToDateString(startTime)
+	startTime := util.FirstSecondOfDay(util.Yesterday())
+	endTime := util.LastSecondOfDay(util.Yesterday())
+	dt := util.ConvertTimeToDateString(startTime)
 	longTimeAgo := time.Now()
 	longTimeAgo = longTimeAgo.AddDate(-20, 0, 0)
 
-	this.logger.Info("统计汇总表 %s -> %s", tool.ConvertTimeToDateTimeString(startTime), tool.ConvertTimeToDateTimeString(endTime))
+	this.logger.Info("统计汇总表 %s -> %s", util.ConvertTimeToDateTimeString(startTime), util.ConvertTimeToDateTimeString(endTime))
 
 	//判断昨天的记录是否已经生成，如果生成了就直接删除掉
 	dbDashboard := this.dashboardDao.FindByDt(dt)
diff --git a/code/dav_controller.go b/code/dav_controller.go
index e24c8a1..fceaaf1 100644
--- a/code/dav_controller.go
+++ b/code/dav_controller.go
@@ -8,7 +8,7 @@ import (
 	"regexp"
 	"strings"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 /**
@@ -87,7 +87,7 @@ func (this *DavController) CheckCurrentUser(writer http.ResponseWriter, request
 	if user == nil {
 		panic(result.BadRequest("邮箱或密码错误"))
 	} else {
-		if !tool.MatchBcrypt(password, user.Password) {
+		if !util.MatchBcrypt(password, user.Password) {
 			panic(result.BadRequest("邮箱或密码错误"))
 		}
 	}
diff --git a/code/dav_service.go b/code/dav_service.go
index a119000..e4b27ab 100644
--- a/code/dav_service.go
+++ b/code/dav_service.go
@@ -10,7 +10,7 @@ import (
 	"tank/code/dav"
 	"tank/code/dav/xml"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 /**
@@ -224,8 +224,8 @@ func (this *DavService) HandlePut(writer http.ResponseWriter, request *http.Requ
 
 	fmt.Printf("PUT %s\n", subPath)
 
-	filename := tool.GetFilenameOfPath(subPath)
-	dirPath := tool.GetDirOfPath(subPath)
+	filename := util.GetFilenameOfPath(subPath)
+	dirPath := util.GetDirOfPath(subPath)
 
 	//寻找符合条件的matter.
 	dirMatter := this.matterDao.CheckWithRootByPath(dirPath, user)
@@ -256,8 +256,8 @@ func (this *DavService) HandleMkcol(writer http.ResponseWriter, request *http.Re
 
 	fmt.Printf("MKCOL %s\n", subPath)
 
-	thisDirName := tool.GetFilenameOfPath(subPath)
-	dirPath := tool.GetDirOfPath(subPath)
+	thisDirName := util.GetFilenameOfPath(subPath)
+	dirPath := util.GetDirOfPath(subPath)
 
 	//寻找符合条件的matter.
 	dirMatter := this.matterDao.CheckWithRootByPath(dirPath, user)
@@ -341,9 +341,9 @@ func (this *DavService) prepareMoveCopy(
 		panic(result.BadRequest("目标前缀必须为：%s", WEBDAV_PREFFIX))
 	}
 
-	destinationName = tool.GetFilenameOfPath(destinationPath)
-	destinationDirPath = tool.GetDirOfPath(destinationPath)
-	srcDirPath = tool.GetDirOfPath(subPath)
+	destinationName = util.GetFilenameOfPath(destinationPath)
+	destinationDirPath = util.GetDirOfPath(destinationPath)
+	srcDirPath = util.GetDirOfPath(subPath)
 
 	overwrite = false
 	if overwriteStr == "T" {
diff --git a/code/download/download.go b/code/download/download.go
index c0e1f87..cbe2416 100644
--- a/code/download/download.go
+++ b/code/download/download.go
@@ -12,7 +12,7 @@ import (
 	"strconv"
 	"strings"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -266,7 +266,7 @@ func DownloadFile(
 	var ctype string
 	if !haveType {
 		//使用mimeUtil来获取mime
-		ctype = tool.GetFallbackMimeType(filename, "")
+		ctype = util.GetFallbackMimeType(filename, "")
 		if ctype == "" {
 			// read a chunk to decide between utf-8 text and binary
 			var buf [sniffLen]byte
diff --git a/code/footprint_service.go b/code/footprint_service.go
index 042082c..e0f359b 100644
--- a/code/footprint_service.go
+++ b/code/footprint_service.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"tank/code/config"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -65,7 +65,7 @@ func (this *FootprintService) Trace(writer http.ResponseWriter, request *http.Re
 
 	//将文件信息存入数据库中。
 	footprint := &Footprint{
-		Ip:      tool.GetIpAddress(request),
+		Ip:      util.GetIpAddress(request),
 		Host:    request.Host,
 		Uri:     request.URL.Path,
 		Params:  paramsString,
diff --git a/code/image_cache_dao.go b/code/image_cache_dao.go
index f5a3c6f..504bddc 100644
--- a/code/image_cache_dao.go
+++ b/code/image_cache_dao.go
@@ -6,7 +6,7 @@ import (
 	"github.com/nu7hatch/gouuid"
 	"os"
 	"path/filepath"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -152,7 +152,7 @@ func (this *ImageCacheDao) deleteFileAndDir(imageCache *ImageCache) {
 	}
 
 	//如果这一层文件夹是空的，那么删除文件夹本身。
-	tool.DeleteEmptyDirRecursive(dirPath)
+	util.DeleteEmptyDirRecursive(dirPath)
 
 }
 
diff --git a/code/image_cache_service.go b/code/image_cache_service.go
index d5e3fc1..1b3a7ee 100644
--- a/code/image_cache_service.go
+++ b/code/image_cache_service.go
@@ -9,7 +9,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 //@Service
@@ -180,7 +180,7 @@ func (this *ImageCacheService) ResizeImage(request *http.Request, filePath strin
 func (this *ImageCacheService) cacheImage(writer http.ResponseWriter, request *http.Request, matter *Matter) *ImageCache {
 
 	//当前的文件是否是图片，只有图片才能处理。
-	extension := tool.GetExtension(matter.Name)
+	extension := util.GetExtension(matter.Name)
 	formats := map[string]imaging.Format{
 		".jpg":  imaging.JPEG,
 		".jpeg": imaging.JPEG,
@@ -204,13 +204,13 @@ func (this *ImageCacheService) cacheImage(writer http.ResponseWriter, request *h
 	//resize图片
 	dstImage := this.ResizeImage(request, matter.AbsolutePath())
 
-	cacheImageName := tool.GetSimpleFileName(matter.Name) + "_" + mode + extension
-	cacheImageRelativePath := tool.GetSimpleFileName(matter.Path) + "_" + mode + extension
-	cacheImageAbsolutePath := GetUserCacheRootDir(user.Username) + tool.GetSimpleFileName(matter.Path) + "_" + mode + extension
+	cacheImageName := util.GetSimpleFileName(matter.Name) + "_" + mode + extension
+	cacheImageRelativePath := util.GetSimpleFileName(matter.Path) + "_" + mode + extension
+	cacheImageAbsolutePath := GetUserCacheRootDir(user.Username) + util.GetSimpleFileName(matter.Path) + "_" + mode + extension
 
 	//创建目录。
 	dir := filepath.Dir(cacheImageAbsolutePath)
-	tool.MakeDirAll(dir)
+	util.MakeDirAll(dir)
 
 	fileWriter, err := os.Create(cacheImageAbsolutePath)
 	this.PanicError(err)
diff --git a/code/install_controller.go b/code/install_controller.go
index 58fec56..c315b03 100644
--- a/code/install_controller.go
+++ b/code/install_controller.go
@@ -13,7 +13,7 @@ import (
 	"strconv"
 	"tank/code/config"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -97,7 +97,7 @@ func (this *InstallController) openDbConnection(writer http.ResponseWriter, requ
 		mysqlPort = tmp
 	}
 
-	mysqlUrl := tool.GetMysqlUrl(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword)
+	mysqlUrl := util.GetMysqlUrl(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword)
 
 	this.logger.Info("连接MySQL %s", mysqlUrl)
 
@@ -126,9 +126,9 @@ func (this *InstallController) closeDbConnection(db *gorm.DB) {
 func (this *InstallController) getCreateSQLFromFile(tableName string) string {
 
 	//1. 从当前安装目录db下去寻找建表文件。
-	homePath := tool.GetHomePath()
+	homePath := util.GetHomePath()
 	filePath := homePath + "/db/" + tableName + ".sql"
-	exists, err := tool.PathExists(filePath)
+	exists, err := util.PathExists(filePath)
 	if err != nil {
 		panic(result.Server("从安装目录判断建表语句文件是否存在时出错！"))
 	}
@@ -140,7 +140,7 @@ func (this *InstallController) getCreateSQLFromFile(tableName string) string {
 
 		filePath1 := filePath
 		filePath = build.Default.GOPATH + "/src/tank/build/db/" + tableName + ".sql"
-		exists, err = tool.PathExists(filePath)
+		exists, err = util.PathExists(filePath)
 		if err != nil {
 			panic(result.Server("从GOPATH判断建表语句文件是否存在时出错！"))
 		}
@@ -344,7 +344,7 @@ func (this *InstallController) CreateAdmin(writer http.ResponseWriter, request *
 	user.Sort = time.Now().UnixNano() / 1e6
 	user.Role = USER_ROLE_ADMINISTRATOR
 	user.Username = adminUsername
-	user.Password = tool.GetBcrypt(adminPassword)
+	user.Password = util.GetBcrypt(adminPassword)
 	user.Email = adminEmail
 	user.Phone = ""
 	user.Gender = USER_GENDER_UNKNOWN
@@ -381,7 +381,7 @@ func (this *InstallController) ValidateAdmin(writer http.ResponseWriter, request
 		panic(result.BadRequest(fmt.Sprintf("%s对应的用户不存在", adminEmail)))
 	}
 
-	if !tool.MatchBcrypt(adminPassword, existEmailUser.Password) {
+	if !util.MatchBcrypt(adminPassword, existEmailUser.Password) {
 		panic(result.BadRequest("邮箱或密码错误"))
 	}
 
@@ -447,7 +447,7 @@ func (this *InstallController) Finish(writer http.ResponseWriter, request *http.
 	jsonStr, _ := jsoniter.ConfigCompatibleWithStandardLibrary.MarshalIndent(configItem, "", " ")
 
 	//写入到配置文件中（不能使用os.O_APPEND 否则会追加）
-	filePath := tool.GetConfPath() + "/tank.json"
+	filePath := util.GetConfPath() + "/tank.json"
 	f, err := os.OpenFile(filePath, os.O_RDWR|os.O_CREATE, 0777)
 	this.PanicError(err)
 	_, err = f.Write(jsonStr)
diff --git a/code/logger/logger.go b/code/logger/logger.go
index 1e71b4e..77fc42c 100644
--- a/code/logger/logger.go
+++ b/code/logger/logger.go
@@ -6,7 +6,7 @@ import (
 	"os"
 	"runtime"
 	"sync"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -39,7 +39,7 @@ func (this *Logger) log(prefix string, format string, v ...interface{}) {
 		line = 0
 	}
 
-	var consoleFormat = fmt.Sprintf("%s%s %s:%d %s", prefix, tool.ConvertTimeToTimeString(time.Now()), tool.GetFilenameOfPath(file), line, content)
+	var consoleFormat = fmt.Sprintf("%s%s %s:%d %s", prefix, util.ConvertTimeToTimeString(time.Now()), util.GetFilenameOfPath(file), line, content)
 	fmt.Printf(consoleFormat)
 
 	this.goLogger.SetPrefix(prefix)
@@ -78,12 +78,12 @@ func (this *Logger) Init() {
 	this.openFile()
 
 	//日志需要自我备份，自我维护。明天第一秒触发
-	nextTime := tool.FirstSecondOfDay(tool.Tomorrow())
+	nextTime := util.FirstSecondOfDay(util.Tomorrow())
 	duration := nextTime.Sub(time.Now())
 
-	this.Info("下一次日志维护时间%s 距当前 %ds ", tool.ConvertTimeToDateTimeString(nextTime), duration/time.Second)
+	this.Info("下一次日志维护时间%s 距当前 %ds ", util.ConvertTimeToDateTimeString(nextTime), duration/time.Second)
 	this.maintainTimer = time.AfterFunc(duration, func() {
-		go tool.SafeMethod(this.maintain)
+		go util.SafeMethod(this.maintain)
 	})
 
 }
@@ -100,7 +100,7 @@ func (this *Logger) maintain() {
 	this.closeFile()
 
 	//日志归类到昨天
-	destPath := tool.GetLogPath() + "/tank-" + tool.Yesterday().Local().Format("2006-01-02") + ".log"
+	destPath := util.GetLogPath() + "/tank-" + util.Yesterday().Local().Format("2006-01-02") + ".log"
 
 	//直接重命名文件
 	err := os.Rename(this.fileName(), destPath)
@@ -113,17 +113,17 @@ func (this *Logger) maintain() {
 
 	//准备好下次维护日志的时间。
 	now := time.Now()
-	nextTime := tool.FirstSecondOfDay(tool.Tomorrow())
+	nextTime := util.FirstSecondOfDay(util.Tomorrow())
 	duration := nextTime.Sub(now)
-	this.Info("下次维护时间：%s ", tool.ConvertTimeToDateTimeString(nextTime))
+	this.Info("下次维护时间：%s ", util.ConvertTimeToDateTimeString(nextTime))
 	this.maintainTimer = time.AfterFunc(duration, func() {
-		go tool.SafeMethod(this.maintain)
+		go util.SafeMethod(this.maintain)
 	})
 }
 
 //日志名称
 func (this *Logger) fileName() string {
-	return tool.GetLogPath() + "/tank.log"
+	return util.GetLogPath() + "/tank.log"
 }
 
 //打开日志文件
diff --git a/code/matter_dao.go b/code/matter_dao.go
index ea6b321..f9b3842 100644
--- a/code/matter_dao.go
+++ b/code/matter_dao.go
@@ -6,7 +6,7 @@ import (
 	"os"
 	"tank/code/config"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -285,7 +285,7 @@ func (this *MatterDao) Delete(matter *Matter) {
 		this.PanicError(db.Error)
 
 		//从磁盘中删除该文件夹。
-		tool.DeleteEmptyDir(matter.AbsolutePath())
+		util.DeleteEmptyDir(matter.AbsolutePath())
 
 	} else {
 
diff --git a/code/matter_model.go b/code/matter_model.go
index 22397e0..a616a9e 100644
--- a/code/matter_model.go
+++ b/code/matter_model.go
@@ -3,7 +3,7 @@ package code
 import (
 	"fmt"
 	"tank/code/config"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 const (
@@ -48,7 +48,7 @@ func (this *Matter) AbsolutePath() string {
 
 // 获取该Matter的MimeType
 func (this *Matter) MimeType() string {
-	return tool.GetMimeType(tool.GetExtension(this.Name))
+	return util.GetMimeType(util.GetExtension(this.Name))
 }
 
 
diff --git a/code/matter_service.go b/code/matter_service.go
index 85e3c0f..0eab721 100644
--- a/code/matter_service.go
+++ b/code/matter_service.go
@@ -8,7 +8,7 @@ import (
 	"strings"
 	"tank/code/download"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 /**
@@ -113,10 +113,10 @@ func (this *MatterService) Upload(file io.Reader, user *User, dirMatter *Matter,
 	fileRelativePath := dirRelativePath + "/" + filename
 
 	//创建父文件夹
-	tool.MakeDirAll(dirAbsolutePath)
+	util.MakeDirAll(dirAbsolutePath)
 
 	//如果文件已经存在了，那么直接覆盖。
-	exist, err := tool.PathExists(fileAbsolutePath)
+	exist, err := util.PathExists(fileAbsolutePath)
 	this.PanicError(err)
 	if exist {
 		this.logger.Error("%s已经存在，将其删除", fileAbsolutePath)
@@ -135,7 +135,7 @@ func (this *MatterService) Upload(file io.Reader, user *User, dirMatter *Matter,
 	fileSize, err := io.Copy(destFile, file)
 	this.PanicError(err)
 
-	this.logger.Info("上传文件 %s 大小为 %v ", filename, tool.HumanFileSize(fileSize))
+	this.logger.Info("上传文件 %s 大小为 %v ", filename, util.HumanFileSize(fileSize))
 
 	//判断用户自身上传大小的限制。
 	if user.SizeLimit >= 0 {
@@ -144,7 +144,7 @@ func (this *MatterService) Upload(file io.Reader, user *User, dirMatter *Matter,
 			err = os.Remove(fileAbsolutePath)
 			this.PanicError(err)
 
-			panic(result.BadRequest("文件大小超出限制 %s > %s ", tool.HumanFileSize(user.SizeLimit), tool.HumanFileSize(fileSize)))
+			panic(result.BadRequest("文件大小超出限制 %s > %s ", util.HumanFileSize(user.SizeLimit), util.HumanFileSize(fileSize)))
 		}
 	}
 
@@ -235,7 +235,7 @@ func (this *MatterService) createDirectory(dirMatter *Matter, name string, user
 	relativePath := dirMatter.Path + "/" + name
 
 	//磁盘中创建文件夹。
-	dirPath := tool.MakeDirAll(absolutePath)
+	dirPath := util.MakeDirAll(absolutePath)
 	this.logger.Info("Create Directory: %s", dirPath)
 
 	//数据库中创建文件夹。
@@ -446,7 +446,7 @@ func (this *MatterService) copy(srcMatter *Matter, destDirMatter *Matter, name s
 		srcAbsolutePath := srcMatter.AbsolutePath()
 
 		//物理文件进行复制
-		tool.CopyFile(srcAbsolutePath, destAbsolutePath)
+		util.CopyFile(srcAbsolutePath, destAbsolutePath)
 
 		//创建新文件的数据库信息。
 		newMatter := &Matter{
@@ -524,8 +524,8 @@ func (this *MatterService) AtomicRename(matter *Matter, name string, user *User)
 		//如果源是文件夹
 
 		oldAbsolutePath := matter.AbsolutePath()
-		absoluteDirPath := tool.GetDirOfPath(oldAbsolutePath)
-		relativeDirPath := tool.GetDirOfPath(matter.Path)
+		absoluteDirPath := util.GetDirOfPath(oldAbsolutePath)
+		relativeDirPath := util.GetDirOfPath(matter.Path)
 		newAbsolutePath := absoluteDirPath + "/" + name
 
 		//物理文件一口气移动
@@ -547,8 +547,8 @@ func (this *MatterService) AtomicRename(matter *Matter, name string, user *User)
 		//如果源是普通文件
 
 		oldAbsolutePath := matter.AbsolutePath()
-		absoluteDirPath := tool.GetDirOfPath(oldAbsolutePath)
-		relativeDirPath := tool.GetDirOfPath(matter.Path)
+		absoluteDirPath := util.GetDirOfPath(oldAbsolutePath)
+		relativeDirPath := util.GetDirOfPath(matter.Path)
 		newAbsolutePath := absoluteDirPath + "/" + name
 
 		//物理文件进行移动
diff --git a/code/preference_controller.go b/code/preference_controller.go
index 642ba21..b750dfc 100644
--- a/code/preference_controller.go
+++ b/code/preference_controller.go
@@ -3,7 +3,7 @@ package code
 import (
 	"net/http"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 )
 
 type PreferenceController struct {
@@ -91,7 +91,7 @@ func (this *PreferenceController) SystemCleanup(writer http.ResponseWriter, requ
 	user := this.checkUser(writer, request)
 	password := request.FormValue("password")
 
-	if !tool.MatchBcrypt(password, user.Password) {
+	if !util.MatchBcrypt(password, user.Password) {
 		panic(result.BadRequest("密码错误，不能执行！"))
 	}
 
diff --git a/code/router.go b/code/router.go
index 67227ef..c6d04d0 100644
--- a/code/router.go
+++ b/code/router.go
@@ -10,7 +10,7 @@ import (
 	"tank/code/config"
 	"tank/code/logger"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 	"time"
 )
 
@@ -108,7 +108,7 @@ func (this *Router) GlobalPanicHandler(writer http.ResponseWriter, request *http
 		}
 
 		//错误情况记录。
-		go tool.SafeMethod(func() {
+		go util.SafeMethod(func() {
 			this.footprintService.Trace(writer, request, time.Now().Sub(startTime), false)
 		})
 	}
@@ -157,7 +157,7 @@ func (this *Router) ServeHTTP(writer http.ResponseWriter, request *http.Request)
 			}
 
 			//正常的访问记录会落到这里。
-			go tool.SafeMethod(func() {
+			go util.SafeMethod(func() {
 				this.footprintService.Trace(writer, request, time.Now().Sub(startTime), true)
 			})
 
@@ -172,7 +172,7 @@ func (this *Router) ServeHTTP(writer http.ResponseWriter, request *http.Request)
 
 	} else {
 		//当作静态资源处理。默认从当前文件下面的static文件夹中取东西。
-		dir := tool.GetHtmlPath()
+		dir := util.GetHtmlPath()
 
 		requestURI := request.RequestURI
 		if requestURI == "" || request.RequestURI == "/" {
@@ -180,16 +180,16 @@ func (this *Router) ServeHTTP(writer http.ResponseWriter, request *http.Request)
 		}
 
 		filePath := dir + requestURI
-		exists, _ := tool.PathExists(filePath)
+		exists, _ := util.PathExists(filePath)
 		if !exists {
 			filePath = dir + "/index.html"
-			exists, _ = tool.PathExists(filePath)
+			exists, _ = util.PathExists(filePath)
 			if !exists {
 				panic(fmt.Sprintf("404 not found:%s", filePath))
 			}
 		}
 
-		writer.Header().Set("Content-Type", tool.GetMimeType(tool.GetExtension(filePath)))
+		writer.Header().Set("Content-Type", util.GetMimeType(util.GetExtension(filePath)))
 
 		diskFile, err := os.Open(filePath)
 		if err != nil {
diff --git a/code/user_controller.go b/code/user_controller.go
index 43d8c9a..219388b 100644
--- a/code/user_controller.go
+++ b/code/user_controller.go
@@ -6,7 +6,7 @@ import (
 	"strconv"
 	"tank/code/config"
 	"tank/code/result"
-	"tank/code/tool"
+	"tank/code/util"
 
 	"time"
 )
@@ -60,7 +60,7 @@ func (this *UserController) Login(writer http.ResponseWriter, request *http.Requ
 		panic(result.BadRequest("邮箱或密码错误"))
 
 	} else {
-		if !tool.MatchBcrypt(password, user.Password) {
+		if !util.MatchBcrypt(password, user.Password) {
 
 			panic(result.BadRequest("邮箱或密码错误"))
 		}
@@ -73,7 +73,7 @@ func (this *UserController) Login(writer http.ResponseWriter, request *http.Requ
 	//持久化用户的session.
 	session := &Session{
 		UserUuid:   user.Uuid,
-		Ip:         tool.GetIpAddress(request),
+		Ip:         util.GetIpAddress(request),
 		ExpireTime: expiration,
 	}
 	session.UpdateTime = time.Now()
@@ -90,7 +90,7 @@ func (this *UserController) Login(writer http.ResponseWriter, request *http.Requ
 
 	//更新用户上次登录时间和ip
 	user.LastTime = time.Now()
-	user.LastIp = tool.GetIpAddress(request)
+	user.LastIp = util.GetIpAddress(request)
 	this.userDao.Save(user)
 
 	return this.Success(user)
@@ -144,7 +144,7 @@ func (this *UserController) Create(writer http.ResponseWriter, request *http.Req
 	user := &User{
 		Role:      GetRole(role),
 		Username:  username,
-		Password:  tool.GetBcrypt(password),
+		Password:  util.GetBcrypt(password),
 		Email:     email,
 		Phone:     phone,
 		Gender:    gender,
@@ -364,11 +364,11 @@ func (this *UserController) ChangePassword(writer http.ResponseWriter, request *
 		return this.Success(user)
 	}
 
-	if !tool.MatchBcrypt(oldPassword, user.Password) {
+	if !util.MatchBcrypt(oldPassword, user.Password) {
 		panic(result.BadRequest("旧密码不正确！"))
 	}
 
-	user.Password = tool.GetBcrypt(newPassword)
+	user.Password = util.GetBcrypt(newPassword)
 
 	user = this.userDao.Save(user)
 
@@ -395,7 +395,7 @@ func (this *UserController) ResetPassword(writer http.ResponseWriter, request *h
 
 	user := this.userDao.CheckByUuid(userUuid)
 
-	user.Password = tool.GetBcrypt(password)
+	user.Password = util.GetBcrypt(password)
 
 	user = this.userDao.Save(user)
 
diff --git a/code/tool/util_encode.go b/code/util/util_encode.go
similarity index 97%
rename from code/tool/util_encode.go
rename to code/util/util_encode.go
index fb3d8e4..44d14b0 100644
--- a/code/tool/util_encode.go
+++ b/code/util/util_encode.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"crypto/md5"
diff --git a/code/tool/util_framework.go b/code/util/util_framework.go
similarity index 95%
rename from code/tool/util_framework.go
rename to code/util/util_framework.go
index 5661bdc..6fdb50e 100644
--- a/code/tool/util_framework.go
+++ b/code/util/util_framework.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 
 //带有panic恢复的方法
diff --git a/code/tool/util_mime.go b/code/util/util_mime.go
similarity index 99%
rename from code/tool/util_mime.go
rename to code/util/util_mime.go
index 4349075..2f6ea7e 100644
--- a/code/tool/util_mime.go
+++ b/code/util/util_mime.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"os"
diff --git a/code/tool/util_network.go b/code/util/util_network.go
similarity index 99%
rename from code/tool/util_network.go
rename to code/util/util_network.go
index fd823c1..5102ad0 100644
--- a/code/tool/util_network.go
+++ b/code/util/util_network.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"net/http"
diff --git a/code/tool/util_path.go b/code/util/util_path.go
similarity index 99%
rename from code/tool/util_path.go
rename to code/util/util_path.go
index 1caac2e..2290216 100644
--- a/code/tool/util_path.go
+++ b/code/util/util_path.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"fmt"
diff --git a/code/tool/util_string.go b/code/util/util_string.go
similarity index 98%
rename from code/tool/util_string.go
rename to code/util/util_string.go
index c968acb..bfc3e66 100644
--- a/code/tool/util_string.go
+++ b/code/util/util_string.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"fmt"
diff --git a/code/tool/util_time.go b/code/util/util_time.go
similarity index 99%
rename from code/tool/util_time.go
rename to code/util/util_time.go
index a7dbecd..9ff70b7 100644
--- a/code/tool/util_time.go
+++ b/code/util/util_time.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"fmt"
diff --git a/code/tool/util_validation.go b/code/util/util_validation.go
similarity index 95%
rename from code/tool/util_validation.go
rename to code/util/util_validation.go
index f95d122..17b7de4 100644
--- a/code/tool/util_validation.go
+++ b/code/util/util_validation.go
@@ -1,4 +1,4 @@
-package tool
+package util
 
 import (
 	"regexp"