diff --git a/app/src/main/java/io/legado/app/help/AppWebDav.kt b/app/src/main/java/io/legado/app/help/AppWebDav.kt
index 5e0647843..dc793ddf2 100644
--- a/app/src/main/java/io/legado/app/help/AppWebDav.kt
+++ b/app/src/main/java/io/legado/app/help/AppWebDav.kt
@@ -18,6 +18,7 @@ import io.legado.app.lib.webdav.Authorization
 import io.legado.app.lib.webdav.WebDav
 import io.legado.app.lib.webdav.WebDavException
 import io.legado.app.lib.webdav.WebDavFile
+import io.legado.app.model.remote.RemoteBookWebDav
 import io.legado.app.ui.widget.dialog.WaitDialog
 import io.legado.app.utils.*
 import kotlinx.coroutines.Dispatchers.IO
@@ -78,6 +79,13 @@ object AppWebDav {
             }
         }
 
+    fun getDefaultRemoteBookWebDav(): RemoteBookWebDav {
+        val rootUrl = "${rootWebDavUrl}books"
+        val authorization = AppWebDav.authorization
+            ?: throw NoStackTraceException("webDav没有配置")
+        return RemoteBookWebDav(rootUrl, authorization)
+    }
+
     suspend fun upConfig() {
         kotlin.runCatching {
             authorization = null
diff --git a/app/src/main/java/io/legado/app/model/remote/RemoteBookManager.kt b/app/src/main/java/io/legado/app/model/remote/RemoteBookManager.kt
index 3a82e6006..abfd68a74 100644
--- a/app/src/main/java/io/legado/app/model/remote/RemoteBookManager.kt
+++ b/app/src/main/java/io/legado/app/model/remote/RemoteBookManager.kt
@@ -4,7 +4,6 @@ import android.net.Uri
 import io.legado.app.data.entities.Book
 
 abstract class RemoteBookManager {
-    protected val remoteBookFolder: String = "books"
 
     /**
      * 获取书籍列表
diff --git a/app/src/main/java/io/legado/app/model/remote/RemoteBookWebDav.kt b/app/src/main/java/io/legado/app/model/remote/RemoteBookWebDav.kt
index ed7ae2612..298a075de 100644
--- a/app/src/main/java/io/legado/app/model/remote/RemoteBookWebDav.kt
+++ b/app/src/main/java/io/legado/app/model/remote/RemoteBookWebDav.kt
@@ -5,8 +5,8 @@ import io.legado.app.constant.AppPattern.bookFileRegex
 import io.legado.app.constant.BookType
 import io.legado.app.data.entities.Book
 import io.legado.app.exception.NoStackTraceException
-import io.legado.app.help.AppWebDav
 import io.legado.app.help.config.AppConfig
+import io.legado.app.lib.webdav.Authorization
 import io.legado.app.lib.webdav.WebDav
 import io.legado.app.lib.webdav.WebDavFile
 import io.legado.app.model.localBook.LocalBook
@@ -17,9 +17,8 @@ import kotlinx.coroutines.runBlocking
 import splitties.init.appCtx
 import java.io.File
 
-object RemoteBookWebDav : RemoteBookManager() {
-
-    val rootBookUrl get() = "${AppWebDav.rootWebDavUrl}${remoteBookFolder}"
+class RemoteBookWebDav(val rootBookUrl: String, val authorization: Authorization) :
+    RemoteBookManager() {
 
     init {
         runBlocking {
@@ -28,69 +27,61 @@ object RemoteBookWebDav : RemoteBookManager() {
     }
 
     suspend fun initRemoteContext() {
-        AppWebDav.authorization?.let {
-            WebDav(rootBookUrl, it).makeAsDir()
-        }
+        WebDav(rootBookUrl, authorization).makeAsDir()
     }
 
     @Throws(Exception::class)
     override suspend fun getRemoteBookList(path: String): MutableList<RemoteBook> {
+        if (!NetworkUtils.isAvailable()) throw NoStackTraceException("网络不可用")
         val remoteBooks = mutableListOf<RemoteBook>()
-        AppWebDav.authorization?.let {
-            //读取文件列表
-            val remoteWebDavFileList: List<WebDavFile> = WebDav(path, it).listFiles()
-            //转化远程文件信息到本地对象
-            remoteWebDavFileList.forEach { webDavFile ->
-                if (webDavFile.isDir || bookFileRegex.matches(webDavFile.displayName)) {
-                    //扩展名符合阅读的格式则认为是书籍
-                    remoteBooks.add(RemoteBook(webDavFile))
-                }
+        //读取文件列表
+        val remoteWebDavFileList: List<WebDavFile> = WebDav(path, authorization).listFiles()
+        //转化远程文件信息到本地对象
+        remoteWebDavFileList.forEach { webDavFile ->
+            if (webDavFile.isDir || bookFileRegex.matches(webDavFile.displayName)) {
+                //扩展名符合阅读的格式则认为是书籍
+                remoteBooks.add(RemoteBook(webDavFile))
             }
-        } ?: throw NoStackTraceException("webDav没有配置")
+        }
         return remoteBooks
     }
 
     override suspend fun getRemoteBook(path: String): RemoteBook? {
-        AppWebDav.authorization?.let {
-            val webDavFile = WebDav(path, it).getWebDavFile()
-                ?: return null
-            return RemoteBook(webDavFile)
-        } ?: throw NoStackTraceException("webDav没有配置")
+        if (!NetworkUtils.isAvailable()) throw NoStackTraceException("网络不可用")
+        val webDavFile = WebDav(path, authorization).getWebDavFile()
+            ?: return null
+        return RemoteBook(webDavFile)
     }
 
     override suspend fun downloadRemoteBook(remoteBook: RemoteBook): Uri {
         AppConfig.defaultBookTreeUri
             ?: throw NoStackTraceException("没有设置书籍保存位置!")
-        return AppWebDav.authorization?.let {
-            val webdav = WebDav(remoteBook.path, it)
-            webdav.downloadInputStream().let { inputStream ->
-                LocalBook.saveBookFile(inputStream, remoteBook.filename)
-            }
-        } ?: throw NoStackTraceException("webDav没有配置")
+        if (!NetworkUtils.isAvailable()) throw NoStackTraceException("网络不可用")
+        val webdav = WebDav(remoteBook.path, authorization)
+        return webdav.downloadInputStream().let { inputStream ->
+            LocalBook.saveBookFile(inputStream, remoteBook.filename)
+        }
     }
 
     override suspend fun upload(book: Book) {
         if (!NetworkUtils.isAvailable()) throw NoStackTraceException("网络不可用")
         val localBookUri = Uri.parse(book.bookUrl)
         val putUrl = "$rootBookUrl${File.separator}${book.originName}"
-        AppWebDav.authorization?.let {
-            if (localBookUri.isContentScheme()) {
-                WebDav(putUrl, it).upload(
-                    byteArray = localBookUri.readBytes(appCtx),
-                    contentType = "application/octet-stream"
-                )
-            } else {
-                WebDav(putUrl, it).upload(localBookUri.path!!)
-            }
-        } ?: throw NoStackTraceException("webDav没有配置")
+        if (localBookUri.isContentScheme()) {
+            WebDav(putUrl, authorization).upload(
+                byteArray = localBookUri.readBytes(appCtx),
+                contentType = "application/octet-stream"
+            )
+        } else {
+            WebDav(putUrl, authorization).upload(localBookUri.path!!)
+        }
         book.origin = BookType.webDavTag + putUrl
         book.save()
     }
 
     override suspend fun delete(remoteBookUrl: String) {
-        AppWebDav.authorization?.let {
-            WebDav(remoteBookUrl, it).delete()
-        } ?: throw NoStackTraceException("webDav没有配置")
+        if (!NetworkUtils.isAvailable()) throw NoStackTraceException("网络不可用")
+        WebDav(remoteBookUrl, authorization).delete()
     }
 
 }
diff --git a/app/src/main/java/io/legado/app/ui/book/import/remote/RemoteBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/import/remote/RemoteBookViewModel.kt
index 725038532..1e85f8c79 100644
--- a/app/src/main/java/io/legado/app/ui/book/import/remote/RemoteBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/import/remote/RemoteBookViewModel.kt
@@ -4,6 +4,8 @@ import android.app.Application
 import io.legado.app.base.BaseViewModel
 import io.legado.app.constant.AppLog
 import io.legado.app.constant.BookType
+import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.model.localBook.LocalBook
 import io.legado.app.model.remote.RemoteBook
 import io.legado.app.model.remote.RemoteBookWebDav
@@ -70,17 +72,26 @@ class RemoteBookViewModel(application: Application) : BaseViewModel(application)
         }
     }.flowOn(Dispatchers.IO)
 
+    private var remoteBookWebDav: RemoteBookWebDav? = null
+
     init {
         execute {
-            RemoteBookWebDav.initRemoteContext()
+            val rootUrl = "${AppWebDav.rootWebDavUrl}books"
+            val authorization = AppWebDav.authorization
+                ?: throw NoStackTraceException("webDav没有配置")
+            remoteBookWebDav = RemoteBookWebDav(rootUrl, authorization)
+        }.onError {
+            context.toastOnUi("初始化webDav出错:${it.localizedMessage}")
         }
     }
 
     fun loadRemoteBookList(path: String?, loadCallback: (loading: Boolean) -> Unit) {
         execute {
+            val bookWebDav = remoteBookWebDav
+                ?: throw NoStackTraceException("没有配置webDav")
             dataCallback?.clear()
-            val url = path ?: RemoteBookWebDav.rootBookUrl
-            val bookList = RemoteBookWebDav.getRemoteBookList(url)
+            val url = path ?: bookWebDav.rootBookUrl
+            val bookList = bookWebDav.getRemoteBookList(url)
             dataCallback?.setItems(bookList)
         }.onError {
             AppLog.put("获取webDav书籍出错\n${it.localizedMessage}", it)
@@ -95,7 +106,9 @@ class RemoteBookViewModel(application: Application) : BaseViewModel(application)
     fun addToBookshelf(remoteBooks: HashSet<RemoteBook>, finally: () -> Unit) {
         execute {
             remoteBooks.forEach { remoteBook ->
-                val downloadBookPath = RemoteBookWebDav.downloadRemoteBook(remoteBook)
+                val bookWebDav = remoteBookWebDav
+                    ?: throw NoStackTraceException("没有配置webDav")
+                val downloadBookPath = bookWebDav.downloadRemoteBook(remoteBook)
                 downloadBookPath.let {
                     val localBook = LocalBook.importFile(it)
                     localBook.origin = BookType.webDavTag + remoteBook.path
diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
index 468630918..5e5075136 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
@@ -19,6 +19,7 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookSource
 import io.legado.app.databinding.ActivityBookInfoBinding
 import io.legado.app.databinding.DialogEditTextBinding
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.book.isAudio
 import io.legado.app.help.book.isLocal
 import io.legado.app.help.book.isLocalTxt
@@ -28,7 +29,6 @@ import io.legado.app.lib.theme.backgroundColor
 import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.lib.theme.getPrimaryTextColor
 import io.legado.app.model.BookCover
-import io.legado.app.model.remote.RemoteBookWebDav
 import io.legado.app.ui.about.AppLogDialog
 import io.legado.app.ui.association.ImportOnLineBookFileDialog
 import io.legado.app.ui.book.audio.AudioPlayActivity
@@ -210,7 +210,8 @@ class BookInfoActivity :
                         waitDialog.setText("上传中.....")
                         waitDialog.show()
                         try {
-                            RemoteBookWebDav.upload(it)
+                            AppWebDav.getDefaultRemoteBookWebDav()
+                                .upload(it)
                             //更新书籍最后更新时间,使之比远程书籍的时间新
                             it.lastCheckTime = System.currentTimeMillis()
                             viewModel.saveBook(it)
@@ -246,7 +247,7 @@ class BookInfoActivity :
 
     private fun showCover(book: Book) {
         binding.ivCover.load(book.getDisplayCover(), book.name, book.author, false, book.origin)
-        if(!AppConfig.isEInkMode) {
+        if (!AppConfig.isEInkMode) {
             BookCover.loadBlur(this, book.getDisplayCover())
                 .into(binding.bgBook)
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
index 189070022..b87690162 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
@@ -15,13 +15,13 @@ import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookSource
 import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.book.*
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.lib.webdav.ObjectNotFoundException
 import io.legado.app.model.BookCover
 import io.legado.app.model.ReadBook
 import io.legado.app.model.localBook.LocalBook
-import io.legado.app.model.remote.RemoteBookWebDav
 import io.legado.app.model.webBook.WebBook
 import io.legado.app.utils.isContentScheme
 import io.legado.app.utils.postEvent
@@ -114,11 +114,12 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
             if (book.isLocal) {
                 book.tocUrl = ""
                 book.getRemoteUrl()?.let {
-                    val remoteBook = RemoteBookWebDav.getRemoteBook(it)
+                    val bookWebDav = AppWebDav.getDefaultRemoteBookWebDav()
+                    val remoteBook = bookWebDav.getRemoteBook(it)
                     if (remoteBook == null) {
                         book.origin = BookType.localTag
                     } else if (remoteBook.lastModify > book.lastCheckTime) {
-                        val uri = RemoteBookWebDav.downloadRemoteBook(remoteBook)
+                        val uri = bookWebDav.downloadRemoteBook(remoteBook)
                         book.bookUrl = if (uri.isContentScheme()) uri.toString() else uri.path!!
                         book.lastCheckTime = remoteBook.lastModify
                     }