Java实现简单的分页功能

本文实例为大家分享了Java实现分页功能的具体代码，供大家参考，具体内容如下

不用根据改变SQL的形式去查询;
直接查询所有的数据,根据页码自动显示数据;

分页对象

public class PageUtils implements Serializable {

  
  private static final long serialVersionUID = -5247614532234782640L;
  public final static String PAGE = "page";
  public final static String PAGE_NO = "pageno";
  public final static String PAGE_SIZE = "pagesize";

  private long pageSize=10;//每页显示记录数
  private long firstResult=0;//当页第一条记录号
  private long totalCount;//总记录数
  private long totalPage;//总页码
  private long pageNo=1;//当前页码
  private List sumData;//此集合可用来保存 合计数据
  private List data;//查询结果

  public long getPageSize() {
    return pageSize;
  }
  public void setPageSize(long pageSize) {
    this.pageSize = pageSize;
  }
  public long getFirstResult() {
    if(pageNo>0){
      firstResult=pageSize * (pageNo -1);
    }else{
      firstResult = 0;
    }
    return firstResult;
  }

  public long getNextPageResult(){
    if(pageNo>0){
      return pageSize*(pageNo-1);
    }else{
      return pageNo;
    }
  }

  public void setFirstResult(long firstResult) {
    this.firstResult = firstResult;
  }
  public long getTotalCount() {
    return totalCount;
  }
  public void setTotalCount(long totalCount) {
    this.totalCount = totalCount;
    totalPage = this.totalCount/pageSize;
    if (totalPage == 0 || totalCount % pageSize != 0) {
      totalPage++;
    }
  }
  public long getTotalPage() {
    return totalPage;
  }
  public void setTotalPage(long totalPage) {
    this.totalPage = totalPage;
  }
  public long getPageNo() {
    return pageNo;
  }
  public void setPageNo(long pageNo) {
    this.pageNo = pageNo;
  }

  public List getData() {
    return data;
  }

  public void setData(List data) {
    this.data = data;
  }

  
  public boolean isFirstPage() {
    return pageNo <= 1;
  }

  
  public boolean isLastPage() {
    return pageNo >= getTotalPage();
  }

  
  public long getNextPage() {
    if (isLastPage()) {
      return pageNo;
    } else {
      return pageNo + 1;
    }
  }

  
  public long getPrePage() {
    if (isFirstPage()) {
      return pageNo;
    } else {
      return pageNo - 1;
    }
  }

  public PageUtils(){}

  public PageUtils(long pageNo){
    this.pageNo=pageNo;
  }

  public PageUtils(long pageNo,long pageSize){
    this.pageNo=pageNo;
    this.pageSize = pageSize;
  }

  public List getSumData() {
    return sumData;
  }
  public void setSumData(List sumData) {
    this.sumData = sumData;
  }

}

查询的数据实体

在查询的实体里添加页码和每页显示条数参数;

private int pageSize;  //每页显示的条数
private int pageNo;   //当前页码
public int getPageSize() {
  return pageSize;
}
public void setPageSize(int pageSize) {
  this.pageSize = pageSize;
}

控制层Controller

@RequestMapping("/list")
public String list(Model model,ChannelValueInfoView input) {
    // input:传入的参数为对象

    PageUtils page=new PageUtils();
    //如果传入的当前条数为0,则赋予值(首次查询不带参);
    if(input.getPageSize()==0){
      //当前页码第一页
      input.setPageNo(1);
      //每页显示条数,当前每页显示10条数据;
      input.setPageSize(10);
    }
    page.setPageNo(input.getPageNo());
    page.setPageSize(input.getPageSize());
    //核心分页代码
    PageHelper p=new PageHelper();   
    Page l=p.startPage(input.getPageNo(),input.getPageSize());
    //紧跟着的第一个select查询将会被分页
    channelValueService.getChannelValueInfoViewList(input);
    model.addAttribute("input", input);
    page.setData(l);
    page.setTotalCount(l.getTotal());
    model.addAttribute("page", page);
    return "index";
  }

页面处理

//循环穿过来的PAGE.data数据




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