添加 逻辑分页 工具类

zen-core/src/main/kotlin/com/gxzc/zen/common/util/LogicPagination.kt

@@ -0,0 +1,56 @@
+package com.gxzc.zen.common.util
+
+import com.baomidou.mybatisplus.plugins.Page
+import com.baomidou.mybatisplus.plugins.pagination.Pagination
+
+/**
+ * 逻辑分页工具类
+ * @author NorthLan
+ * @date 2018/3/21
+ * @url https://noahlan.com
+ */
+object LogicPagination {
+
+    /**
+     * 逻辑分页 获取分页后的list
+     * @param current 当前页码
+     * @param size 每页容量
+     */
+    fun <T> paginationList(data: MutableList<T>, current: Int, size: Int): MutableList<T> {
+        var fromIndex = (current - 1) * size
+        if (fromIndex > data.size) {
+            fromIndex = data.size
+        }
+        var toIndex = current * size
+        if (toIndex > data.size) {
+            toIndex = data.size
+        }
+        return data.subList(fromIndex, toIndex)
+    }
+
+    /**
+     * 逻辑分页 获取分页信息(包含分页后的数据)
+     * @param current 当前页码
+     * @param size 每页容量
+     * @return 返回值参数示例
+     * {
+     *   "total": 9,
+     *   "size": 4,
+     *   "pages": 3,
+     *   "current": 1,
+     *   "records": [
+     *       {
+     *           "id": 1,
+     *           "enable": true,
+     *           "key": "gender",
+     *           "value": "1",
+     *           "label": "男",
+     *           "sort": 1
+     *       }
+     *   ]
+     * }
+     */
+    fun <T> pagination(data: MutableList<T>, current: Int, size: Int): Pagination {
+        return Page<T>(current, size).setRecords(paginationList(data, current, size)).setTotal(data.size)
+    }
+}