PageInfo.java
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package top.panll.assist.utils;
import java.util.ArrayList;
import java.util.List;
public class PageInfo<T> {
//当前页
private int pageNum;
//每页的数量
private int pageSize;
//当前页的数量
private int size;
//总页数
private int pages;
//总数
private int total;
private List<T> resultData;
private List<T> list;
public PageInfo(List<T> resultData) {
this.resultData = resultData;
}
public void startPage(int page, int count) {
if (count <= 0) count = 10;
if (page <= 0) page = 1;
this.pageNum = page;
this.pageSize = count;
this.total = resultData.size();
this.pages = total%count == 0 ? total/count : total/count + 1;
int fromIndx = (page - 1) * count;
if ( fromIndx > this.total - 1) {
this.list = new ArrayList<>();
this.size = 0;
return;
}
int toIndx = page * count;
if (toIndx > this.total) {
toIndx = this.total;
}
this.list = this.resultData.subList(fromIndx, toIndx);
this.size = this.list.size();
}
public int getPageNum() {
return pageNum;
}
public void setPageNum(int pageNum) {
this.pageNum = pageNum;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}
public List<T> getList() {
return list;
}
public void setList(List<T> list) {
this.list = list;
}
}