com.alilitech.integration.jpa.pagination.PageHelper Maven / Gradle / Ivy
/**
* Copyright 2017-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.alilitech.integration.jpa.pagination;
/**
* 分页工具类
*
* @author Zhou Xiaoxiang
* @since 1.0
*/
public class PageHelper {
/**
* 计算当前分页偏移量
*
* @param current 当前页
* @param size 每页显示数量
* @return
*/
public static int offsetCurrent(int current, int size) {
if (current > 0) {
return (current - 1) * size;
}
return 0;
}
/**
*
* @param pagination
* @return
*/
public static int offsetCurrent(Pagination pagination) {
if (null == pagination) {
return 0;
}
return offsetCurrent(pagination.getPage(), pagination.getSize());
}
}