diff --git a/app/src/main/java/io/legado/app/help/storage/OldReplace.kt b/app/src/main/java/io/legado/app/help/ReplaceAnalyzer.kt
similarity index 96%
rename from app/src/main/java/io/legado/app/help/storage/OldReplace.kt
rename to app/src/main/java/io/legado/app/help/ReplaceAnalyzer.kt
index eb8b4b8d2..a8e126f9e 100644
--- a/app/src/main/java/io/legado/app/help/storage/OldReplace.kt
+++ b/app/src/main/java/io/legado/app/help/ReplaceAnalyzer.kt
@@ -1,9 +1,9 @@
-package io.legado.app.help.storage
+package io.legado.app.help
 
 import io.legado.app.data.entities.ReplaceRule
 import io.legado.app.utils.*
 
-object OldReplace {
+object ReplaceAnalyzer {
 
     fun jsonToReplaceRules(json: String): List<ReplaceRule> {
         val replaceRules = mutableListOf<ReplaceRule>()
diff --git a/app/src/main/java/io/legado/app/help/storage/ImportOldData.kt b/app/src/main/java/io/legado/app/help/storage/ImportOldData.kt
index b2709cc35..9e157dc1c 100644
--- a/app/src/main/java/io/legado/app/help/storage/ImportOldData.kt
+++ b/app/src/main/java/io/legado/app/help/storage/ImportOldData.kt
@@ -4,7 +4,9 @@ import android.content.Context
 import android.net.Uri
 import androidx.documentfile.provider.DocumentFile
 import io.legado.app.data.appDb
+import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookSource
+import io.legado.app.help.ReplaceAnalyzer
 import io.legado.app.utils.*
 import java.io.File
 
@@ -83,7 +85,7 @@ object ImportOldData {
     }
 
     private fun importOldBookshelf(json: String): Int {
-        val books = OldBook.toNewBook(json)
+        val books = fromOldBooks(json)
         appDb.bookDao.insert(*books.toTypedArray())
         return books.size
     }
@@ -95,8 +97,48 @@ object ImportOldData {
     }
 
     private fun importOldReplaceRule(json: String): Int {
-        val rules = OldReplace.jsonToReplaceRules(json)
+        val rules = ReplaceAnalyzer.jsonToReplaceRules(json)
         appDb.replaceRuleDao.insert(*rules.toTypedArray())
         return rules.size
     }
+
+    private fun fromOldBooks(json: String): List<Book> {
+        val books = mutableListOf<Book>()
+        val items: List<Map<String, Any>> = jsonPath.parse(json).read("$")
+        val existingBooks = appDb.bookDao.allBookUrls.toSet()
+        for (item in items) {
+            val jsonItem = jsonPath.parse(item)
+            val book = Book()
+            book.bookUrl = jsonItem.readString("$.noteUrl") ?: ""
+            if (book.bookUrl.isBlank()) continue
+            book.name = jsonItem.readString("$.bookInfoBean.name") ?: ""
+            if (book.bookUrl in existingBooks) {
+                DebugLog.d(javaClass.name, "Found existing book: " + book.name)
+                continue
+            }
+            book.origin = jsonItem.readString("$.tag") ?: ""
+            book.originName = jsonItem.readString("$.bookInfoBean.origin") ?: ""
+            book.author = jsonItem.readString("$.bookInfoBean.author") ?: ""
+            book.type =
+                if (jsonItem.readString("$.bookInfoBean.bookSourceType") == "AUDIO") 1 else 0
+            book.tocUrl = jsonItem.readString("$.bookInfoBean.chapterUrl") ?: book.bookUrl
+            book.coverUrl = jsonItem.readString("$.bookInfoBean.coverUrl")
+            book.customCoverUrl = jsonItem.readString("$.customCoverPath")
+            book.lastCheckTime = jsonItem.readLong("$.bookInfoBean.finalRefreshData") ?: 0
+            book.canUpdate = jsonItem.readBool("$.allowUpdate") == true
+            book.totalChapterNum = jsonItem.readInt("$.chapterListSize") ?: 0
+            book.durChapterIndex = jsonItem.readInt("$.durChapter") ?: 0
+            book.durChapterTitle = jsonItem.readString("$.durChapterName")
+            book.durChapterPos = jsonItem.readInt("$.durChapterPage") ?: 0
+            book.durChapterTime = jsonItem.readLong("$.finalDate") ?: 0
+            book.intro = jsonItem.readString("$.bookInfoBean.introduce")
+            book.latestChapterTitle = jsonItem.readString("$.lastChapterName")
+            book.lastCheckCount = jsonItem.readInt("$.newChapters") ?: 0
+            book.order = jsonItem.readInt("$.serialNumber") ?: 0
+            book.variable = jsonItem.readString("$.variable")
+            book.setUseReplaceRule(jsonItem.readBool("$.useReplaceRule") == true)
+            books.add(book)
+        }
+        return books
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/storage/OldBook.kt b/app/src/main/java/io/legado/app/help/storage/OldBook.kt
deleted file mode 100644
index fd3c939d8..000000000
--- a/app/src/main/java/io/legado/app/help/storage/OldBook.kt
+++ /dev/null
@@ -1,50 +0,0 @@
-package io.legado.app.help.storage
-
-import io.legado.app.data.appDb
-import io.legado.app.data.entities.Book
-import io.legado.app.utils.*
-
-
-object OldBook {
-
-    fun toNewBook(json: String): List<Book> {
-        val books = mutableListOf<Book>()
-        val items: List<Map<String, Any>> = jsonPath.parse(json).read("$")
-        val existingBooks = appDb.bookDao.allBookUrls.toSet()
-        for (item in items) {
-            val jsonItem = jsonPath.parse(item)
-            val book = Book()
-            book.bookUrl = jsonItem.readString("$.noteUrl") ?: ""
-            if (book.bookUrl.isBlank()) continue
-            book.name = jsonItem.readString("$.bookInfoBean.name") ?: ""
-            if (book.bookUrl in existingBooks) {
-                DebugLog.d(javaClass.name, "Found existing book: " + book.name)
-                continue
-            }
-            book.origin = jsonItem.readString("$.tag") ?: ""
-            book.originName = jsonItem.readString("$.bookInfoBean.origin") ?: ""
-            book.author = jsonItem.readString("$.bookInfoBean.author") ?: ""
-            book.type =
-                if (jsonItem.readString("$.bookInfoBean.bookSourceType") == "AUDIO") 1 else 0
-            book.tocUrl = jsonItem.readString("$.bookInfoBean.chapterUrl") ?: book.bookUrl
-            book.coverUrl = jsonItem.readString("$.bookInfoBean.coverUrl")
-            book.customCoverUrl = jsonItem.readString("$.customCoverPath")
-            book.lastCheckTime = jsonItem.readLong("$.bookInfoBean.finalRefreshData") ?: 0
-            book.canUpdate = jsonItem.readBool("$.allowUpdate") == true
-            book.totalChapterNum = jsonItem.readInt("$.chapterListSize") ?: 0
-            book.durChapterIndex = jsonItem.readInt("$.durChapter") ?: 0
-            book.durChapterTitle = jsonItem.readString("$.durChapterName")
-            book.durChapterPos = jsonItem.readInt("$.durChapterPage") ?: 0
-            book.durChapterTime = jsonItem.readLong("$.finalDate") ?: 0
-            book.intro = jsonItem.readString("$.bookInfoBean.introduce")
-            book.latestChapterTitle = jsonItem.readString("$.lastChapterName")
-            book.lastCheckCount = jsonItem.readInt("$.newChapters") ?: 0
-            book.order = jsonItem.readInt("$.serialNumber") ?: 0
-            book.variable = jsonItem.readString("$.variable")
-            book.setUseReplaceRule(jsonItem.readBool("$.useReplaceRule") == true)
-            books.add(book)
-        }
-        return books
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt b/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
index 7f8534743..18ce6bb00 100644
--- a/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
@@ -7,10 +7,10 @@ import io.legado.app.constant.AppPattern
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.ReplaceRule
 import io.legado.app.help.AppConfig
+import io.legado.app.help.ReplaceAnalyzer
 import io.legado.app.help.http.newCallResponseBody
 import io.legado.app.help.http.okHttpClient
 import io.legado.app.help.http.text
-import io.legado.app.help.storage.OldReplace
 import io.legado.app.utils.isAbsUrl
 import io.legado.app.utils.splitNotBlank
 
@@ -87,11 +87,11 @@ class ImportReplaceRuleViewModel(app: Application) : BaseViewModel(app) {
                 okHttpClient.newCallResponseBody {
                     url(text)
                 }.text("utf-8").let {
-                    val rules = OldReplace.jsonToReplaceRules(it)
+                    val rules = ReplaceAnalyzer.jsonToReplaceRules(it)
                     allRules.addAll(rules)
                 }
             } else {
-                val rules = OldReplace.jsonToReplaceRules(text)
+                val rules = ReplaceAnalyzer.jsonToReplaceRules(text)
                 allRules.addAll(rules)
             }
         }.onError {