更新list分页小功能

panda-code/src/main/java/org/panda/code/uitl/CollectionUtil.java

@@ -3,7 +3,9 @@ package org.panda.code.uitl;
 import org.apache.commons.collections.CollectionUtils;
 import org.apache.commons.collections.MapUtils;
 
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -50,4 +52,36 @@ public class CollectionUtil {
     public static boolean isNotEmpty(Map<?,?> map){
         return !isEmpty(map);
     }
+
+    /**
+     * list分页
+     * @param list
+     * @param page
+     * @param pageSize
+     * @return
+     */
+    public static <T> List<T> subPageList(List<T> list,int page,int pageSize){
+        List<T> pageList = new ArrayList(pageSize);
+        //list不为NULL而且list的size>0
+        if (list!=null&&list.size()>0&&page>0&&pageSize>0) {
+            //总页数
+            int count = list.size();
+            int pageCount = count / pageSize;
+            if ((pageCount % pageSize) != 0) {
+                pageCount++;
+            }
+            if (page <= pageCount) {
+                //开始索引
+                int startIndex;
+                //结束索引
+                int endIndex;
+                endIndex = (page * pageSize) - 1;
+                startIndex = endIndex - pageSize;
+                pageList = pageList.subList(startIndex, endIndex);
+            }
+        }
+        return  pageList;
+    }
+
+
 }