jquery easyui DataGrid分页操作-IT论坛

安哥网络

上午没事抽空做了一个datagrid的入门例子，是结合struts2做的，刚下班了，也闲着没事，就datagrid的再做进一步的开发；进行分页操作另外本人有一个习惯，拒绝转载或者抄袭他人的东西.此外，事例源码尽量完整，哪怕最简单的代码也要写的清楚.
先看效果：IT论坛








虽然说是入门的例子，但本人尽量做的详细点，以后会继续更新，部分功能
此外，为了后继easyui的学习，做了一个简单的框架：后台采用hibernate2.5+struts2开发：数据库用mysql。红色代码标记注意。

model层的数据
   Student类
package org.easyui.model;
import java.util.Date;
public class Student {
private int id;
private int age;
private String name;
private Date birthday;
private String className;
private char sex;

public char getSex() {
  return sex;
}
public void setSex(char sex) {
  this.sex = sex;
}
public int getAge() {
  return age;
}
public void setAge(int age) {
  this.age = age;
}
public Date getBirthday() {
  return birthday;
}
public void setBirthday(Date birthday) {
  this.birthday = birthday;
}
public int getId() {
  return id;
}
public void setId(int id) {
  this.id = id;
}
public String getName() {
  return name;
}
public String getClassName() {
  return className;
}
public void setName(String name) {
  this.name = name;
}
public void setClassName(String className) {
  this.className = className;
}

}


DAO数据库访问层
  接口EasyDao：
package org.easyui.dao;
import java.util.List;
import org.easyui.model.Student;
public interface EasyDao {
public List<Student> getStudent(int page,int rows);
public int getTotalPages(int rows);
}

接口实现类EasyDaoImpl：
package org.easyui.dao;
import java.util.List;
import org.easyui.model.Student;
import org.easyui.util.UtilHibernate;
import org.hibernate.HibernateException;
import org.hibernate.Session;
public class EasyDaoImpl implements EasyDao {
@SuppressWarnings("unchecked")
public List<Student> getStudent(int page, int rows) {
  List<Student> list = null;
  Session session = UtilHibernate.getSession();
  try {
   session.beginTransaction();
   String sql = "from Student";
   list = session.createQuery(sql)
        .setFirstResult((page-1)*rows)
        .setMaxResults(rows)
        .list();
   session.getTransaction().commit();
  } catch (HibernateException e) {
   session.getTransaction().rollback();
   e.printStackTrace();
  }finally{
   UtilHibernate.closeSession(session);
  }
  
  return list;
}
public int getTotalPages() {
  Session session = UtilHibernate.getSession();
  int total = 0;
  try {
   session.beginTransaction();
   String sql = "select count(*) from Student";
   int count = (Integer)session.createQuery(sql).uniqueResult();
   total =count;
   session.getTransaction().commit();
  } catch (HibernateException e) {
   session.getTransaction().rollback();
   e.printStackTrace();
  }finally{
   UtilHibernate.closeSession(session);
  }
  return total;
}
}



Action层:
EasyuiAction1 代码如下
package org.easyui;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.easyui.dao.EasyDao;
import org.easyui.dao.EasyDaoImpl;
import org.easyui.model.Student;
import com.opensymphony.xwork2.ActionSupport;
public class EasyuiAction1 extends ActionSupport implements ServletRequestAware{
private static final long serialVersionUID = 1L;
private  HttpServletRequest request;
private int total;
private List<Object> rows;

public int getTotal() {
  return total;
}
public List<Object> getRows() {
  return rows;
}
public void setTotal(int total) {
  this.total = total;
}
public void setRows(List<Object> rows) {
  this.rows = rows;
}

@Override
public String execute() throws Exception {
  int page =Integer.parseInt(request.getParameter("page"));
  int row = Integer.parseInt(request.getParameter("rows"));//接受参数page和rows
  EasyDao dao = new EasyDaoImpl();   //实例化dao
  this.total = dao.getTotalPages();
  this.rows = new ArrayList<Object>();
  List<Student> list = dao.getStudent(page, row);//分页，将数据保存到list中
  
  for(int i=0;i<list.size();i++){
   Student student  = list.get(i);    //最原始循环方法到到student对象
   Map<String,Object> map = new HashMap<String,Object>();
   map.put("id", student.getId());        //以键值对的形式保存到map中
   map.put("sex", student.getSex());
   map.put("name",student.getName());
   map.put("age", student.getAge());
   map.put("birthday", student.getBirthday());
   map.put("className", student.getClassName());      
   this.rows.add(map);       //循环保存map到list对象this.rows中
  }
  System.out.println(request.getParameter("page"));
  System.out.println(request.getParameter("rows"));
  return SUCCESS;
}
public void setServletRequest(HttpServletRequest request) {
  this.request = request;
}
}



struts.xml配置如下：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="jsonDemo" extends="json-default">
   <action name="easyAction" class="org.easyui.EasyuiAction1">
    <result type="json"/>
   </action>
  </package>
</struts>   



easyDemo1.jsp页面代码如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
   
    <title>easyDemo1.jsp</title>
<link rel="stylesheet" type="text/css" href="jquery-easyui/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="jquery-easyui/themes/icon.css">
<script type="text/javascript" src="jquery-easyui/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="jquery-easyui/jquery.easyui.min.js"></script>

    <script type="text/javascript" src="jslib/easyDemo.js"></script>
<script type="text/javascript">
  $(function(){
   $('#tt').datagrid({
    title:'datagrid小例子',
    iconCls:'icon-ok',
    width:500,
    height:320,
    pageSize:5,
    pageList:[5,10,15,20],
    nowrap:false,
    striped: true,
    collapsible:true,
    [url=]url:'easyAction.action'[/url],
    loadMsg:'数据装载中......',
    sortName:'code',
    sortOrder:'desc',
    remoteSort:false,
    frozenColumns:[[
     {field:'ck',checkbox:true}
    ]],
    columns:[[
     {title:'学号',field:'id',width:'50',rowspan:2,align:'center'},
     {title:'姓名',field:'name',width:'60',rowspan:2,align:'center'},
     {title:'性别',field:'sex',width:'50',rowspan:2,align:'center'},
     {title:'年龄',field:'age',width:'50',rowspan:2,align:'center'},
     {title:'出生日期',field:'birthday',width:'120',rowspan:2,align:'center'},
     {title:'班级',field:'className',width:'100',rowspan:2,align:'center'}
    ]],
    pagination:true,
    rownumbers:true
   
   });
   $('#tt').datagrid('getPager').pagination({
    displayMsg:'当前显示从{from}到{to}共{total}记录',
    onBeforeRefresh:function(pageNumber, pageSize){
     $(this).pagination('loading');
     alert('pageNumber:'+pageNumber+',pageSize:'+pageSize);
     $(this).pagination('loaded');
    },
   });
   
   //$('#tt').datagrid({url:'easyAction.action'});
  });
</script>
  </head>

  <body>
    <a href="javascript:void(0)" class="easyui-linkbutton">测试josn数据</a>
    <h2><b>测试easyui的DataGrid</b></h2>
    <table id="tt">
    </table>
  </body>
</html>



easyDemo.js代码如下:
var xmlhttp;
function verify(){
    //创建XMLHttpRequest对象
    if(window.XMLHttpRequest){
        xmlhttp = new XMLHttpRequest();
        if(xmlhttp.overrideMimeType){
            xmlhttp.overrideMimeType("text/xml");
        }
    }else if(window.ActiveXObject){
      var activerxName = ["MSXML2.XMLHTTP","Microsoft.XMLHTTP"];
        for(var i=0;i<activerxName.length;i++){
            try{
                 xmlhttp = new ActiveXObject(activerxName);
              break;
            }catch(e){
            }
        }
    }
    //确认XMLHttpRequest对象是否创建成功
    if(!xmlhttp){
        alert("XMLHttpRequest对象创建失败");
        return;
    }else{
    }
    xmlhttp.onreadystatechange = callback;
    xmlhttp.open("POST","easyAction.action?page=1&rows=5","true");
    xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    xmlhttp.send();
}
function callback(){
    if(xmlhttp.readyState == 4){
        if(xmlhttp.status == 200){
          var oBook = eval('(' + xmlhttp.responseText + ')');
         $.messager.alert('test jsonData',xmlhttp.responseText);
        }
   }
}


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数据库操作(easyui)：http://hi.baidu.com/620734263/blog/item/156078115d6a80e5c2ce791a.html

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