简单的Java分页工具

分页工具"/>

简单的Java分页工具

目录

1. 定义page类 

2. PageUtiL类

1. 定义page类 

import java.util.AbstractList;
import java.util.ArrayList;
import java.util.List;/*** @version 1.0* @Author Lix* @Date 2022/7/20 18:34* @desc Another day of coding*/
public class Page<E> extends AbstractList<E> {private int totalPages;private long totalElements;private int numberOfElements;private int size;private int number;private List<E> content;public Page() {this.content = new ArrayList();}public void setTotalPages(int totalPages) {this.totalPages = totalPages;}public void setTotalElements(long totalElements) {this.totalElements = totalElements;}public void setNumberOfElements(int numberOfElements) {this.numberOfElements = numberOfElements;}public void setSize(int size) {this.size = size;}public void setNumber(int number) {this.number = number;}public void setContent(List<E> content) {this.content = content;}public int getTotalPages() {return totalPages;}public long getTotalElements() {return totalElements;}public int getNumberOfElements() {return numberOfElements;}public int getSize() {return size;}public int getNumber() {return number;}public List<E> getContent() {return content;}@Overridepublic E get(int index) {return this.content.get(index);}@Overridepublic int size() {return this.content.size();}
}

2. PageUtiL类

import cn.hutool.db.PageResult;
import org.springframework.util.CollectionUtils;import java.util.List;/*** @version 1.0* @Author Lix* @Date 2022/7/20 18:14* @desc Another day of coding*/
public class PageUtil {public static <T> Page<T> pageMethod(List<T> list, PageResult pageRequest) {Page<T> result = new Page<T>();if (CollectionUtils.isEmpty(list)){return result;}int start = pageRequest.getPage() * pageRequest.getPageSize();int end = (pageRequest.getPage() + 1) * pageRequest.getPageSize();if (list.size() < end) {end = list.size();}int total = list.size();List<T> subList = list.subList(start, end);result.setTotalElements((long) total);result.setSize(pageRequest.getPageSize());result.setNumber(pageRequest.getPage());result.setTotalPages((total - 1) / pageRequest.getPageSize() + 1);result.setNumberOfElements(subList.size());result.setContent(subList);return result;}
}