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工具类：ListPageUtil

package com.dt.user.center.util;import java.util.Collections;import java.util.List;public class ListPageUtil
   
     {
       private List
    
      data;    /** 上一页 */    private int lastPage;    /** 当前页 */    private int currentPage;    /** 下一页 */    private int nextPage;//    /** 每页条数 */    private int pageSize;    /** 总页数 */    private int totalPage;    /** 总数据条数 */    private int totalCount;    public ListPageUtil(List
     
       data, int currentPage, int pageSize) {
           if (data == null || data.isEmpty()) {
               throw new IllegalArgumentException("data must be not empty!");        }        this.data = data;        this.pageSize = pageSize;        this.currentPage = currentPage;        this.totalCount = data.size();        this.totalPage = (totalCount + pageSize - 1) / pageSize;        this.lastPage = currentPage-1>1? currentPage-1:1;        this.nextPage = currentPage>=totalPage? totalPage: currentPage + 1;    }    /**     * 得到分页后的数据     * @return 分页后结果     *///    public List
      
        getPagedLst() {
   //        int fromIndex = (nowPage - 1) * pageSize;//        if (fromIndex >= data.size()) {
   //            return Collections.emptyList();//空数组//        }//        if(fromIndex<0){
   //            return Collections.emptyList();//空数组//        }//        int toIndex = nowPage * pageSize;//        if (toIndex >= data.size()) {
   //            toIndex = data.size();//        }//        return data.subList(fromIndex, toIndex);//    }    public int getPageSize() {
           return pageSize;    }    public List
       
         getData() {
           int fromIndex = (currentPage - 1) * pageSize;        if (fromIndex >= data.size()) {
               return Collections.emptyList();//空数组        }        if(fromIndex<0){
               return Collections.emptyList();//空数组        }        int toIndex = currentPage * pageSize;        if (toIndex >= data.size()) {
               toIndex = data.size();        }        return data.subList(fromIndex, toIndex);    }    public int getLastPage() {
           return lastPage;    }    public int getCurrentPage() {
           return currentPage;    }    public int getNextPage() {
           return nextPage;    }    public int getTotalPage() {
           return totalPage;    }    public int getTotalCount() {
           return totalCount;    }}
       
      
     
    
   

使用方式：

ListPageUtil
   
     pageUtil = new ListPageUtil<>(parentBOList,parent_pageIndex, parent_pageSize);List
    
      data = pageUtil.getData();// 其他方法参考工具类方法。
    
   

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