<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
       <hibernate-mapping>
       <class name="com.model.Order"  table="t_order" lazy="false">
           <id name="orderId" column="OrderId">
               <generator class="uuid.hex" />
           </id>
           <property name="name" column="Name" type="string" />
           <property name="desn" column="Desn" type="string"/>
           <property name="booktime" column="Booktime" type="string"/>
           <property name="company" column="Company" />
           <many-to-one lazy="false" name="custom" column="CustomId" class="com.model.Customer" />
       </class>
   </hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
   <hibernate-mapping>
       <class name="com.model.Custom"  table="t_custom" lazy="false">
           <id name="customId" column="Id">
               <generator class="uuid.hex" />
           </id>
           <property name="customName" column="Name" type="string" />
       </class>
   </hibernate-mapping>

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import net.sf.json.*;
//具体的那些serivce的包引入我就省略了
public class OrderAction extends ActionSupport
{
   private static final long serialVersionUID = -5092865658281004791L;
    private IOrderSerivce orderSerivce;
    private String jsonString;//这个就是中转站了
    private List<Order> orderList;//这个是数据链表
    private int totalCount;//这个是extjs用来分页
     public String getJsonString()
    {
        return jsonString;
    }
     public void setJsonString(String jsonString)
    {
        this.jsonString = jsonString;
    }
    public int getTotalCount()
    {
        return totalCount;
    }
    public void setTotalCount(int totalCount)
    {
        this.totalCount = totalCount;
    }
    public List<Air> getOrderList()
    {
        return orderList;
    }
    public void setOrderList(List<Order> orderList)
    {
        this.orderList = orderList;
    }
    public void setOrderSerivce(OrderSerivce orderSerivce)
    {
        this.orderSerivce = orderSerivce;
    }
    public String getAllAir()
    {
        orderList = orderSerivce.getOrderAll();
        this.setTotalCount(orderList.size());
        
        JSONArray array = JSONArray.fromObject(orderList);
//哈哈，就是在这里进行转换的
        this.jsonString = "{totalCount:"+this.getTotalCount()+",results:"+array.toString()+"}";
    return SUCCESS;
    }
}

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
      <package name="order" extends="struts-default">
<action name="getAllOrder" class="orderAction" method="getAllOrder">
            <result name="success" >jsondata.jsp</result>
        </action>
      </package>
</struts>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<s:property value="jsonString" escape="false" />

/**//*
 * Ext JS Library 2.1
 * Copyright(c) 2006-2008, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://extjs.com/license
 */


Ext.onReady(function(){
    Ext.BLANK_IMAGE_URL = 'ext/resources/images/default/s.gif'; 
    Ext.QuickTips.init();
    var xg = Ext.grid;
    //这里就是设置解析格式的地方，一定要和你的Model一样，要不然可是什么都得不到哦~~~~
    var rd = new Ext.data.JsonReader({
                //总记录数
                totalProperty: 'totalCount', 
                //哪儿是数据的头，可以看action里面是怎么定义数据格式的，这里就是如何解析的           
                    root: 'results', 
                //有那些字段呢？
                fields:[
                         {name:'orderId'},
                                      {name:'desn'},
                         {name:'booktime'},
                         {name:'company'},
                         {name:'name'},
                            //这里就是对custom对象进行映射的地方                        
                                      {name:'customId' ,mapping:'custom.customId'},
                         {name:'customName',mapping:'custom.customName'}
                         ]
                                     });
     var ds = new Ext.data.Store({
                                    proxy: new Ext.data.HttpProxy
({url: 'getAllOrder.action',method:'POST'}),//Url很关键，我就是因为没配好这个，POST方法很重要，你可以省略，让你看下错误也行的！耽误了一大堆时间！
                                    reader:rd
                                });
     ds.load();
     var sm =new xg.CheckboxSelectionModel(); //CheckBox选择列
     var cm =new xg.ColumnModel([
                                  new Ext.grid.RowNumberer(), //行号列 
                                  sm,
                                  {id:'orderId',header: "订单号", dataIndex: 'name'},                           {header: "订单时间",   dataIndex: 'booktime'},
                                  {header: "订单公司", dataIndex: 'company'},
                                  {header:"客户姓名",dataIndex:'customName'}
                                 ]);
                                 cm.defaultSortable = true;
    ////
    // OrderGrid 
    ////

    var ordergrid = new xg.GridPanel({
                                  ds: ds,
                                  sm: sm, 
                                  cm: cm, 
                                  width:1000,
                                  height:500,
                                  frame:true,
                                  title:'Framed with Checkbox Selection and Horizontal Scrolling',
                                  iconCls:'icon-grid',
                                  renderTo: document.body
                                 });
    ordergrid.render();

});