JAVA 分页工具类及其使用

Pager.java

 package pers.kangxu.datautils.common;

 import java.io.Serializable;
 import java.util.List;

 /**
  *
  * <b> 分页通用类 </b>
  *
  * @author kangxu
  * @param <T>
  *
  */
 public class Pager<T> implements Serializable {

     /**
      *
      */
     private static final long serialVersionUID = 4542617637761955078L;

     /**
      * currentPage 当前页
      */
     private int currentPage = 1;
     /**
      * pageSize 每页大小
      */
     private int pageSize = 10;
     /**
      * pageTotal 总页数
      */
     private int pageTotal;
     /**
      * recordTotal 总条数
      */
     private int recordTotal = 0;
     /**
      * previousPage 前一页
      */
     private int previousPage;
     /**
      * nextPage 下一页
      */
     private int nextPage;
     /**
      * firstPage 第一页
      */
     private int firstPage = 1;
     /**
      * lastPage 最后一页
      */
     private int lastPage;
     /**
      * content 每页的内容
      */
     private List<T> content;

     // 以下set方式是需要赋值的
     /**
      * 设置当前页 <br>
      *
      * @author kangxu
      *
      * @param currentPage
      */
     public void setCurrentPage(int currentPage) {
         this.currentPage = currentPage;
     }

     /**
      * 设置每页大小,也可以不用赋值,默认大小为10条 <br>
      *
      * @author kangxu
      *
      * @param pageSize
      */
     public void setPageSize(int pageSize) {
         this.pageSize = pageSize;
     }

     /**
      * 设置总条数,默认为0 <br>
      *
      * @author kangxu
      *
      * @param recordTotal
      */
     public void setRecordTotal(int recordTotal) {
         this.recordTotal = recordTotal;
         otherAttr();
     }

     /**
      * 设置分页内容 <br>
      *
      * @author kangxu
      *
      * @param content
      */
     public void setContent(List<T> content) {
         this.content = content;
     }

     /**
      * 设置其他参数
      *
      * @author kangxu
      *
      */
     public void otherAttr() {
         // 总页数
         this.pageTotal = this.recordTotal % this.pageSize > 0 ? this.recordTotal / this.pageSize + 1 : this.recordTotal / this.pageSize;
         // 第一页
         this.firstPage = 1;
         // 最后一页
         this.lastPage = this.pageTotal;
         // 前一页
         if (this.currentPage > 1) {
             this.previousPage = this.currentPage - 1;
         } else {
             this.previousPage = this.firstPage;
         }
         // 下一页
         if (this.currentPage < this.lastPage) {
             this.nextPage = this.currentPage + 1;
         } else {
             this.nextPage = this.lastPage;
         }
     }

     // 放开私有属性
     public int getCurrentPage() {
         return currentPage;
     }

     public int getPageSize() {
         return pageSize;
     }

     public int getPageTotal() {
         return pageTotal;
     }

     public int getRecordTotal() {
         return recordTotal;
     }

     public int getPreviousPage() {
         return previousPage;
     }

     public int getNextPage() {
         return nextPage;
     }

     public int getFirstPage() {
         return firstPage;
     }

     public int getLastPage() {
         return lastPage;
     }

     public List<T> getContent() {
         return content;
     }

     @Override
     public String toString() {
         return "Pager [currentPage=" + currentPage + ", pageSize=" + pageSize
                 + ", pageTotal=" + pageTotal + ", recordTotal=" + recordTotal
                 + ", previousPage=" + previousPage + ", nextPage=" + nextPage
                 + ", firstPage=" + firstPage + ", lastPage=" + lastPage
                 + ", content=" + content + "]";
     }

 }

使用 PagerTester.java

 package pers.kangxu.datautils.utils;

 import java.util.ArrayList;
 import java.util.List;

 import pers.kangxu.datautils.common.Pager;

 /**
  * 分页数据测试
  * <b>
  *
  * </b>
  * @author kangxu
  *
  */
 public class PagerTester {

     public static void main(String[] args) {

         Pager<String> pager = new Pager<String>();

         List<String> content = new ArrayList<String>();
         content.add("str1");
         content.add("str2");
         content.add("str3");
         content.add("str4");
         content.add("str5");
         content.add("str6");
         content.add("str7");
         content.add("str8");
         content.add("str9");
         content.add("str10");

         pager.setCurrentPage(1);
         pager.setPageSize(10);
         pager.setRecordTotal(62);
         pager.setContent(content);

         System.out.println(pager);

     }

 }