diff --git a/zhuike/src/main/java/com/deiniu/zhuike/utils/BookUtil.java b/zhuike/src/main/java/com/deiniu/zhuike/utils/BookUtil.java
index fdadf15..e4b5bef 100644
--- a/zhuike/src/main/java/com/deiniu/zhuike/utils/BookUtil.java
+++ b/zhuike/src/main/java/com/deiniu/zhuike/utils/BookUtil.java
@@ -91,7 +91,7 @@ public class BookUtil {
             Log.d(TAG, String.format("bookchapter  :%s,fileName :%s, chapter Size %s",c.getChapterName(),c.getChapterPath(),c.getLength()));
         }
 
-
+        chaptCache = new HashMap<Integer,Cache>();
         if(directoryList.isEmpty()) {
 
             if (bookPath == null || !bookPath.equals(book.getBookpath())) {
@@ -471,7 +471,7 @@ public class BookUtil {
         return block;
     }
 
-    Map<Integer,Cache> chaptCache = new HashMap<Integer,Cache>();
+    private Map<Integer,Cache> chaptCache = new HashMap<Integer,Cache>();
 
     //获取chapter 缓存
     public char[] chaptChars(int index) {
@@ -482,6 +482,15 @@ public class BookUtil {
         if (block == null) {
             try {
                 File file = new File(fileChapterName(index));
+
+                if(!file.exists()){
+                    /* 章节内容没有缓存在本地
+                        1. 根据本地的章节网络地址信息，读取章节内容到本地，若读取失败则
+                        2. 查询主服务器，若有地址更新则更新本地信息，并重复1，若没有更新地址，则地址无效，返回章节内容正待手打
+                    */
+                }
+
+
                 int size = (int)file.length();
                 if (size < 0) {
                     throw new RuntimeException("Error during reading " + fileChapterName(index));
diff --git a/zhuike/src/main/java/com/deiniu/zhuike/utils/PageFactory.java b/zhuike/src/main/java/com/deiniu/zhuike/utils/PageFactory.java
index 96371a1..2121498 100644
--- a/zhuike/src/main/java/com/deiniu/zhuike/utils/PageFactory.java
+++ b/zhuike/src/main/java/com/deiniu/zhuike/utils/PageFactory.java
@@ -802,11 +802,11 @@ public class PageFactory {
     public void preChapter(){
         if (mBookUtil.getDirectoryList().size() > 0){
             int num = currentChapter;
-            if (num ==0){
+            if (num ==1){
                 num =getCurrentCharter();
             }
             num --;
-            if (num >= 0){
+            if (num >= 1){
 
                 nextChaptPages =currentChaptPages;
                 currentChapter = num;
@@ -826,7 +826,7 @@ public class PageFactory {
             num =getCurrentCharter();
         }
         num ++;
-        if (num < getDirectoryList().size()){
+        if (num <= getDirectoryList().size()){
 
             preChaptPages =currentChaptPages;
             currentChapter = num;