动手封装一个完整的java分页工具类PageBean

原文链接： https://blog.csdn.net/guobinhui/article/details/80394707

转载自：https://blog.csdn.net/guobinhui/article/details/80394707

众所周知，web项目基本上都会用到动态分页功能，下面给大家整理写一个完整的PageBean工具类，大家把完整代码拷到自己项目里就可以直接用，本实例也适用于APP项目的翻页，废话不多说，直接上代码

import java.util.List;
 
/**
 * 作者：guobinhui 

 * 创建时间：2018年5月21日 

 * 描述：动态分页Bean
 */
public class PageBean {
 
	private List pageData;
	private Integer currentPage = Integer.valueOf(1);
	private Integer pageSize = Integer.valueOf(10);
	private Integer totalCount;
	
     public int getPageCount(){
	if (this.totalCount.intValue() % this.pageSize.intValue() == 0) {
	     return this.totalCount.intValue() / this.pageSize.intValue();
	 }
	     return this.totalCount.intValue() / this.pageSize.intValue() + 1;
     }
	   
     public PageBean(List pageData, Integer totalCount) {
	    this.pageData = pageData;
	    this.totalCount = totalCount;
     }
     
     public PageBean() {}
	     
     public boolean isFirst()
     {
         return (this.currentPage.intValue() == 1) || (this.totalCount.intValue() == 0);
     }
	     
     public boolean isLast() {
    	 return (this.totalCount.intValue() == 0) || (this.currentPage.intValue() >= getPageCount());
     }
 
     public boolean isHasNext()
     {
    	 return this.currentPage.intValue() < getPageCount();
     }
	     
     public boolean isHasPrev() {
    	 return this.currentPage.intValue() > 1;
     }  
     public Integer getNextPage()
     {
	     if (this.currentPage.intValue() >= getPageCount()) {
	       return Integer.valueOf(getPageCount());
	       }
	     return Integer.valueOf(this.currentPage.intValue() + 1);
     }
	     
     public Integer getPrevPage() {
	     if (this.currentPage.intValue() <= 1) {
	      return Integer.valueOf(1);
	       }	       
	     return Integer.valueOf(this.currentPage.intValue() - 1);
     }
	     
     public List getPageData() {
	     return this.pageData;
	     }
	     
     public void setPageData(List pageData) {
	     this.pageData = pageData;
     }
	     
     public Integer getCurrentPage() {
    	 return this.currentPage;
     }
     
     public void setCurrentPage(Integer currentPage) {
    	 this.currentPage = currentPage;
     }
	     
     public Integer getPageSize() {
    	 return this.pageSize;
     }
     
     public void setPageSize(Integer pageSize) {
    	 this.pageSize = pageSize;
     }		
	     
     public Integer getTotalCount() {
    	 return this.totalCount;
     }
     
     public void setTotalCount(Integer totalCount) {
    	 this.totalCount = totalCount;
     }
}

项目service中，只需要根据参数page和pageSize这2个参数，就可以查出符合条件的记录(List),和总数totalCount，把这2个参数传入PageBean这个构造器中即可返回分页的所有数据，代码示例如下：

最终返回的数据结构如下：

{ "data":{
        "first": true,
        "hasNext": false,
        "hasPrev": false,
        "last": true,
        "nextPage": 1,
        "currentPage": 1,
        "pageCount": 1,
        "pageSize": 20,
        "prevPage": 1,
        "totalCount ": 3,
        "pageData":[{
             "voipId ":"2142343254353456436",
             "voipStateDate ":"2018-04-23 14:02:00",
             "objName":"guoxiansheng",
             "voipStatus":1 
        }]
   },
   "errorCode":10000,
   "erorInfo":"创建成功"
}