EXT 3.x 使用详解之Ext.grid.GridPanel(三)
本篇主要介绍了grid的ajax功能以及分页标签功能，具体看代码吧，注释很全面，感慨一下组件还是比较实用和漂亮的！
为介绍方便简洁，这里没有使用数据库，而直接创建了一些对象，参考者可以自己改成数据库即可。
JSP页面部分：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page pageEncoding="UTF-8"%>
<html>
<head>
<style type="text/css">
html,body{
margin:0px;
height:100%;
}
#content{
height:100%;
width:100%;
}
</style>
</head>
<body style="height:100%">
<script type="text/javascript">
//本例加入了grid组件的ajax以及分页的功能
var grid;
var cm;
var ds;
//分页标签栏
var bbar;
//全局高度设定，用来调整整个grid的高度
var h;
//性别详细
function renderSex(value) {
if (value == 'male') {
return "<span style='color:red;font-weight:bold;'>男</span>";
} else {
return "<span style='color:green;font-weight:bold;'>女</span>";
}
}
//描述详细
function renderDescn(value, cellmeta, record, rowIndex, columnIndex,store){
var str = (rowIndex+1)+"行|"+(columnIndex+1)+"列";
return str;
}
Ext.onReady(function()
{
//对列的定义
cm = new Ext.grid.ColumnModel([
{header:'<font color="blue">编号</font>',width: Ext.get("content").getWidth()/5,sortable:true,dataIndex:'id'},//sortable 可排序，具体体现在有排序选项卡
{header:'<font color="blue">日期</font>',width: Ext.get("content").getWidth()/5,dataIndex:'time',renderer:Ext.util.Format.dateRenderer('Y-m-d h:i:s')},
{header:'<font color="blue">性别</font>',width: Ext.get("content").getWidth()/5,dataIndex:'sex',renderer:renderSex},
{header:'<font color="blue">名称</font>',width: Ext.get("content").getWidth()/5,dataIndex:'name'},
{header:'<font color="blue">描述</font>',width: Ext.get("content").getWidth()/5,dataIndex:'descn',renderer:renderDescn}
]);
//ajax代理
var proxyParam={
url:'http://localhost:8080/MyTest/search.do?method=SearchAjax',
method:'GET'
};
//对ajax返回的json数据进行解析,
var jsonReaderMeta={
root: 'grids',//Json对象的root名称,与SearchVO的属性相对应
totalProperty: 'totalCount', //数据的总行数 ,与SearchVO的属性相对应
id: 'id' //数据的主键,与GridVO的属性相对应
};
//解析Json数据的类型
var recordType=[
{name: 'id', mapping: 'id'},
//日期类型如果是String也可以表明为date型，不过需要标明pattern,具体pattern可查api中date类
{name: 'time', mapping: 'time',type : 'date',dateFormat : 'Y-m-d h:i:s' },
{name: 'sex', mapping: 'sex'},
{name: 'name', mapping: 'name'},
{name: 'desc', mapping: 'desc'}
];
//定义dataStore
ds = new Ext.data.Store({
proxy: new Ext.data.HttpProxy(proxyParam),
reader: new Ext.data.JsonReader(jsonReaderMeta,recordType),
remoteSort:true //允许到后台进行排序
});
//定义分页标签
bbar = new Ext.PagingToolbar({
pageSize: 3,
store: ds,
displayInfo: true,
displayMsg: '第{0} 到 {1} 条数据 共{2}条',
emptyMsg: "没有数据"
});
//创建grid对象
grid = new Ext.grid.GridPanel({
renderTo: 'content',
width: Ext.get("content").getWidth(),
store: ds,
cm: cm,
loadMask: true,
bbar: bbar
//如果需要每列自动填满Grid，可以使用viewConfig配置中的foreceFit
//viewConfig:{forceFit:true}
});
//加载dataStore，此时可以带一些必要的参数提交到后台
ds.load({params:{start:0, limit:3}});
//在dataStore加载的时候进行高度的自动调整
ds.on('load', function(){
h = $('.x-panel-bbar').height()+$('.x-grid3-body').height()+$('.x-grid3-header').height()+20;
grid.setHeight(h);
});
});
//自动适应浏览器窗口调整
window.onresize=function(){
cm = new Ext.grid.ColumnModel([
{header:'<font color="blue">编号</font>',width: Ext.get("content").getWidth()/5,sortable:true,dataIndex:'id'},
{header:'<font color="blue">日期</font>',width: Ext.get("content").getWidth()/5,dataIndex:'time',renderer:Ext.util.Format.dateRenderer('Y年m月d日h时m分s秒')},
{header:'<font color="blue">性别</font>',width: Ext.get("content").getWidth()/5,dataIndex:'sex',renderer:renderSex},
{header:'<font color="blue">名称</font>',width: Ext.get("content").getWidth()/5,dataIndex:'name'},
{header:'<font color="blue">描述</font>',width: Ext.get("content").getWidth()/5,dataIndex:'descn',renderer:renderDescn}
]);
if(grid){
grid.setWidth(Ext.get("content").getWidth());
//重新载入dataStore和cm,此时会根据数据以及新设定的cm自动调整宽和高
grid.reconfigure(ds,cm);
}
};
</script>
<div id="content">
<div>
</body>
</html>
下面是后台search.do部分(注意实用了json数据类型，请加入json相关的包):
public ActionForward SearchAjax(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
Integer start = Integer.valueOf(request.getParameter("start"));
Integer limit = Integer.valueOf(request.getParameter("limit"));
System.out.println("start:" + start + "|limit:" + limit);
String sort = request.getParameter("sort");
String dir = request.getParameter("dir");
if (StringUtils.isBlank(sort)) {
sort = "id";
}
if (StringUtils.isBlank(dir)) {
dir = "ASC";
}
System.out.println("sort:" + sort + "|" + dir);
List<GridVO> lists = new ArrayList<GridVO>();
GridVO vo = new GridVO();
vo.setId(1);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name1");
vo.setDesc("descn1");
lists.add(vo);
vo = new GridVO();
vo.setId(2);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name2");
vo.setDesc("descn2");
lists.add(vo);
vo = new GridVO();
vo.setId(3);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name3");
vo.setDesc("descn3");
lists.add(vo);
vo = new GridVO();
vo.setId(4);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name4");
vo.setDesc("descn4");
lists.add(vo);
vo = new GridVO();
vo.setId(5);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name5");
vo.setDesc("descn5");
lists.add(vo);
vo = new GridVO();
vo.setId(6);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name6");
vo.setDesc("descn6");
lists.add(vo);
vo = new GridVO();
vo.setId(7);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name7");
vo.setDesc("descn7");
lists.add(vo);
vo = new GridVO();
vo.setId(8);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name8");
vo.setDesc("descn8");
lists.add(vo);
vo = new GridVO();
vo.setId(9);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name9");
vo.setDesc("descn9");
lists.add(vo);
vo = new GridVO();
vo.setId(10);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name10");
vo.setDesc("descn10");
lists.add(vo);
vo = new GridVO();
vo.setId(11);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name11");
vo.setDesc("descn11");
lists.add(vo);
vo = new GridVO();
vo.setId(12);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name12");
vo.setDesc("descn12");
lists.add(vo);
vo = new GridVO();
vo.setId(13);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name13");
vo.setDesc("descn13");
lists.add(vo);
vo = new GridVO();
vo.setId(14);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name14");
vo.setDesc("descn14");
lists.add(vo);
vo = new GridVO();
vo.setId(15);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name15");
vo.setDesc("descn15");
lists.add(vo);
vo = new GridVO();
vo.setId(16);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name16");
vo.setDesc("descn16");
lists.add(vo);
vo = new GridVO();
vo.setId(17);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name17");
vo.setDesc("descn17");
lists.add(vo);
vo = new GridVO();
vo.setId(18);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name18");
vo.setDesc("descn18");
lists.add(vo);
vo = new GridVO();
vo.setId(19);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name19");
vo.setDesc("descn19");
lists.add(vo);
vo = new GridVO();
vo.setId(20);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name20");
vo.setDesc("descn20");
lists.add(vo);
vo = new GridVO();
vo.setId(21);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name21");
vo.setDesc("descn21");
lists.add(vo);
vo = new GridVO();
vo.setId(22);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name22");
vo.setDesc("descn22");
lists.add(vo);
vo = new GridVO();
vo.setId(23);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name23");
vo.setDesc("descn23");
lists.add(vo);
vo = new GridVO();
vo.setId(24);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name24");
vo.setDesc("descn24");
lists.add(vo);
vo = new GridVO();
vo.setId(25);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name25");
vo.setDesc("descn25");
lists.add(vo);
vo = new GridVO();
vo.setId(26);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name26");
vo.setDesc("descn26");
lists.add(vo);
vo = new GridVO();
vo.setId(27);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name27");
vo.setDesc("descn27");
lists.add(vo);
vo = new GridVO();
vo.setId(28);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name28");
vo.setDesc("descn28");
lists.add(vo);
vo = new GridVO();
vo.setId(29);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name29");
vo.setDesc("descn29");
lists.add(vo);
vo = new GridVO();
vo.setId(30);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name30");
vo.setDesc("descn30");
lists.add(vo);
vo = new GridVO();
vo.setId(31);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name31");
vo.setDesc("descn31");
lists.add(vo);
vo = new GridVO();
vo.setId(32);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name32");
vo.setDesc("descn32");
lists.add(vo);
vo = new GridVO();
vo.setId(33);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name33");
vo.setDesc("descn33");
lists.add(vo);
vo = new GridVO();
vo.setId(34);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name34");
vo.setDesc("descn34");
lists.add(vo);
vo = new GridVO();
vo.setId(35);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name35");
vo.setDesc("descn35");
lists.add(vo);
vo = new GridVO();
vo.setId(36);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name36");
vo.setDesc("descn36");
lists.add(vo);
vo = new GridVO();
vo.setId(37);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name37");
vo.setDesc("descn37");
lists.add(vo);
vo = new GridVO();
vo.setId(38);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name38");
vo.setDesc("descn38");
lists.add(vo);
vo = new GridVO();
vo.setId(39);
vo.setTime(dateFormat());
vo.setSex("male");
vo.setName("name39");
vo.setDesc("descn39");
lists.add(vo);
vo = new GridVO();
vo.setId(40);
vo.setTime(dateFormat());
vo.setSex("female");
vo.setName("name40");
vo.setDesc("descn40");
lists.add(vo);
// 排序
lists = sortObj(lists, sort, dir);
SearchVO searchVO = new SearchVO();
searchVO.setTotalCount(lists.size());
lists = findCurrentPageObj(lists, start, limit);
searchVO.setGrids(lists);
JSONObject obj = JSONObject.fromObject(searchVO);
System.out.println(obj.toString());
response.setContentType("text/xml;charset=utf-8");
response.getWriter().print(obj.toString());
return null;
}
private List<GridVO> sortObj(List<GridVO> list, String sort, String dir) {
Set<ResultTokenDelegate> someSet = new TreeSet<ResultTokenDelegate>();
List<GridVO> result = new ArrayList<GridVO>();
for (GridVO res : list) {
ResultTokenDelegate delegate = new ResultTokenDelegate(res, sort,
dir);
someSet.add(delegate);
}
Iterator iterator = someSet.iterator();
while (iterator.hasNext()) {
ResultTokenDelegate delegate = (ResultTokenDelegate) iterator
.next();
result.add(delegate.getResult());
}
return result;
}
List<GridVO> findCurrentPageObj(List<GridVO> list, int start, int limit) {
List<GridVO> vos = new ArrayList<GridVO>();
for (int i = 0; i < list.size(); i++) {
if (i >= start && i < (start + limit)) {
vos.add(list.get(i));
}
}
return vos;
}
String dateFormat() {
SimpleDateFormat smf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
Date date = new Date(System.currentTimeMillis());
return smf.format(date);
}
ResultTokenDelegate类的代码，用来为list对象排序的：
package com.xuyi.util.sort;
import com.xuyi.vo.GridVO;
public class ResultTokenDelegate implements Comparable {
private GridVO result;
private String sort;
private String dir;
public ResultTokenDelegate() {
}
public ResultTokenDelegate(GridVO result, String sort, String dir) {
this.result = result;
this.sort=sort;
this.dir=dir;
}
public GridVO getResult() {
return result;
}
public void setResult(GridVO result) {
this.result = result;
}
public String getDir() {
return dir;
}
public void setDir(String dir) {
this.dir = dir;
}
public String getSort() {
return sort;
}
public void setSort(String sort) {
this.sort = sort;
}
public int compareTo(Object o) {
ResultTokenDelegate ntd = (ResultTokenDelegate) o;
if ("id".equals("id")) {
if ("ASC".equals(dir)) {
if (this.getResult().getId() < ntd.getResult().getId()) {
return -1;
} else if (this.getResult().getId() == ntd.getResult().getId()) {
return 1;
} else {
return 1;
}
}else{
if (this.getResult().getId() < ntd.getResult().getId()) {
return 1;
} else if (this.getResult().getId() == ntd.getResult().getId()) {
return 1;
} else {
return -1;
}
}
}else{
return 1;
}
}
}
GridVO类的代码:
package com.xuyi.vo;
public class GridVO {
int id;
String sex;
String name;
String desc;
String time;
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
SearchVO的代码:
package com.xuyi.vo;
import java.util.ArrayList;
import java.util.List;
public class SearchVO {
int totalCount;
List<GridVO> grids = new ArrayList<GridVO>();
public List<GridVO> getGrids() {
return grids;
}
public void setGrids(List<GridVO> grids) {
this.grids = grids;
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
}