当前位置： 移动技术网 > IT编程>开发语言>Java > Java实现简单的分页功能

Java实现简单的分页功能

2019年07月19日  | 移动技术网IT编程  | 我要评论

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;
  }

  /**
   * 是否第一页
   */
  public boolean isfirstpage() {
    return pageno <= 1;
  }

  /**
   * 是否最后一页
   */
  public boolean islastpage() {
    return pageno >= gettotalpage();
  }

  /**
   * 下一页页码
   */
  public long getnextpage() {
    if (islastpage()) {
      return pageno;
    } else {
      return pageno + 1;
    }
  }

  /**
   * 上一页页码
   */
  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<channelvalueinfolist> 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
<tr th:each="ts : ${page.data}">
<td th:text="${ts.channelvaluename}"></td>


----------
<form id="content_form" action="/channelvalue/list" method="post" >
  <div>
    总数：<span id="totalcount" th:text="${page.totalcount}">0</span>
  </div>
  <ul class="pagination">
    <li class="disabled">
      <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="onfirst()">首页</a>
    </li>
    <li class="disabled">
      <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="onpre()"><</a>
    </li>
    <li class="active">
      <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
        <span id="beginrow" th:text="${page.pageno}">0</span>
      </a>
    </li>
    <li class="disabled">
      <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="onnext()">></a>
    </li>
    <li class="disabled">
      <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" onclick="onlast()">尾页</a>
    </li>
  </ul>
</for  m>


----------

<script>
  function onfirst() {
    onlist(1);
  }
  function onpre() {
    var beginrow = parseint($('#beginrow').html());
    if (beginrow - 1 > 0) {
      onlist(beginrow - 1);
    }

  }
  function onnext() {
    var beginrow = parseint($('#beginrow').html());
    var totalcount = parseint($('#totalcount').html());
    var pagesize = parseint($('#pagesize').val());
    if (parseint(totalcount / pagesize + 1) > beginrow + 1) {
      onlist(beginrow+1);
    }
  }
  function onlast() {
    var totalcount = parseint($('#totalcount').html());
    var pagesize = parseint($('#pagesize').val());
    onlist(parseint(totalcount / pagesize + 1) - 1);
  }
  function onlist(pageno) {
    if (pageno == 0)
      pageno = 1;
    $('#pageno').val(pageno);
    $("#content_form").submit();
  }
</script>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。

您可能感兴趣的文章:

如对本文有疑问， 点击进行留言回复！！

相关文章:

验证码：
最近更新的文章
大家感兴趣的文章
移动技术网