46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
package com.engine.organization.util.page;
|
||
|
||
import com.github.pagehelper.Page;
|
||
import com.github.pagehelper.PageHelper;
|
||
import org.apache.commons.collections4.CollectionUtils;
|
||
|
||
import java.util.Collections;
|
||
import java.util.List;
|
||
|
||
|
||
public class PageUtil {
|
||
|
||
public static void start(Integer pageNum, Integer pageSize) {
|
||
pageNum = pageNum == null || pageNum <= 0 ? 1 : pageNum;
|
||
pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
|
||
PageHelper.startPage(pageNum, pageSize);
|
||
}
|
||
|
||
|
||
public static <T> Page<T> buildPage(Integer pageNo, Integer pageSize) {
|
||
pageNo = pageNo == null || pageNo <= 0 ? 1 : pageNo;
|
||
pageSize = pageSize == null || pageSize <= 0 ? 10 : pageSize;
|
||
return new Page(pageNo, pageSize, true);
|
||
}
|
||
|
||
/**
|
||
* 分页
|
||
*
|
||
* @param pageNo 页码（从1开始）
|
||
* @param pageSize 每页条数
|
||
* @param source 待分页的数据
|
||
* @param <T> 范型制定类
|
||
* @return
|
||
*/
|
||
public static <T> List<T> subList(int pageNo, int pageSize, List<T> source) {
|
||
if (CollectionUtils.isEmpty(source)) {
|
||
return Collections.emptyList();
|
||
}
|
||
int endIndex = pageNo * pageSize;
|
||
int startIndex = (pageNo - 1) * pageSize;
|
||
startIndex = startIndex < 0 ? 0 : startIndex;
|
||
return source.subList(startIndex > source.size() ? source.size() : startIndex,
|
||
endIndex > source.size() ? source.size() : endIndex);
|
||
}
|
||
}
|