优化缓存模块

src/main/java/org/sss/presentation/noui/cache/AbstractCache.java

@@ -30,7 +30,7 @@ public abstract class AbstractCache implements CacheController {
         Object o = cacheKey.getKey();
         String fullSizeKey = generateKey(o);
         Integer fullSize = (Integer) doCacheRead(fullSizeKey);
-        if(fullSize == null)
+        if (fullSize == null)
             fullSize = 0;
         if (fullSize == 0) {
             try {
@@ -41,7 +41,13 @@ public abstract class AbstractCache implements CacheController {
             }
         }
         String valKey = generateValKey(o, maxSize, offset);
-        List lst = (List) doCacheRead(valKey);
+        Object lstobj = doCacheRead(valKey);
+        List lst = null;
+        if (lstobj != null && List.class.isAssignableFrom(lstobj.getClass())) {
+            lst = List.class.cast(lstobj);
+        } else {
+            lst = null;
+        }
         if (lst == null) {
             if (o instanceof Criteria) {
                 Criteria criteria = (Criteria) o;
@@ -75,8 +81,10 @@ public abstract class AbstractCache implements CacheController {
                     throw new NoUiException("[" + this.cacheName + "]执行sql出现异常", e);
                 }
             }
+            if (lst != null) {
                 doCacheWrite(valKey, lst, keepAlive);
             }
+        }
         return new CacheList(lst, fullSize);
     }
 
@@ -86,7 +94,7 @@ public abstract class AbstractCache implements CacheController {
             sb.append(SPLIT.intern());
             sb.append(maxSize);
         }
-        if (offset > 0) {
+        if (offset >= 0) {
             sb.append(SPLIT.intern());
             sb.append(offset);
         }