jqGrid支持多种数据类型,但比较多的是JSON。开发中我们可能会见到{}构造json数据的代码,比较繁琐。如果采用了json-lib,操作比较简单,因为操作的都是java对象,只是操作对象时需要按照格式即可。在工程里要使用该功能,就需要使用json-lib.jar,下载地址:http://json-lib.sourceforge.net/
页面:
<body>
<table id="gridTable"></table>
<div id="gridPager"></div>
</body>
前端初始化脚本:
$(function()
{
$("#gridTable").jqGrid({
url:'jqGridServlet',
datatype: "json",
height: 250,
colNames:['编号','姓名, '性别', '邮箱', 'QQ','手机','出生日期'],
colModel:[
{name:'id',index:'id', sorttype:"int"},
{name:'userName',index:'userName',
{name:'gender',index:'gender',
{name:'email',index:'email', ;string"},
{name:'QQ',index:'QQ', ;
{name:'mobilePhone',index:'mobilePhone', ;
{name:'birthday',index:'birthday', sorttype:"date"}
],
sortname:'id',
sortorder:'asc',
viewrecords:true,
rowNum:10,
rowList:[10,20,30],
jsonReader:{
repeatitems : false //jsonReader:{repeatitems : false}则是为了后台处理数据方便而设置
},
pager:"#gridPager",
caption: "jqGrid与Servlet集成"
}).navGrid('#gridPager',{edit:false,add:false,del:false});
})
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
/**
* 该Servlet向客户端返回一个json对象。为了简便,数据不是从数据库获得的。
* jqGrid默认期望返回的json对象格式要求如下:
* {"page":"1","total":"2","records":"13",
* "rows":[
* {id:"1",cell:["1","polaris","男","[email protected]","772618379","18329382732","1985-10-2"]},
* {id:"2",cell:["2","张三","女","[email protected]","272618382","15329382732","1986-10-12"]},
* {id:"3",cell:["3","王五","女","[email protected]","172635372","13329389832","1987-12-21"]},
* {id:"4",cell:["4","赵六","男","[email protected]","372618332","18929343731","1988-09-22"]}
* ]
* }
* 当然,在js中,可以通过jqGrid的jsonReader属性来修改默认格式
* 因为默认的格式,rows的数据要求顺序不能变,且每个字段都得有值(空也得有"")。因而,
* 在jsonReader中定义repeatitems : false。这样,rows就变成了:
* "rows":[
* {id:"1",userName:"polaris",gender:" 男",email:"[email protected]",QQ:"772618379",mobilePhone:"18329382732",birthday:"1985-10-2"]},
* {id:"2",userName:"徐新华",gender:" 男",email:"[email protected]",QQ:"272618382",mobilePhone:"15329382732",birthday:"1986-10-12"]},
* {id:"3",userName:"王五",gender:" 女",email:"[email protected]",QQ:"172635372",mobilePhone:"13329389832",birthday:"1987-12-21"]},
* {id:"4",userName:"赵六",gender:" 女",email:"[email protected]",QQ:"372618332",mobilePhone:"18929343731",birthday:"1988-09-22"]}
* ]
* @author xuxinhua
*
*/
public class JqGridForJSONServlet extends HttpServlet
{
private static final long serialVersionUID = 132383828833L;
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// 定义返回的数据类型:json,使用了json-lib
JSONObject jsonObj = new JSONObject();
// 根据jqGrid对JSON的数据格式要求给jsonObj赋值
jsonObj.put("page", 1); // 当前页
jsonObj.put("total", 1); // 总页数
jsonObj.put("records", 4); // 总记录数
// 定义rows,存放数据
JSONArray rows = new JSONArray();
// 放入4条数据
for(int i=0;i<4;i++)
{
// 存放一条记录的对象
JSONObject cell = new JSONObject();
cell.put("id", i);
if(i%2==0)
{
cell.put("userName", "polaris");
cell.put("gender", "女");
}
else
{
cell.put("userName", "徐新华");
cell.put("gender", "男");
}
cell.put("email", "[email protected]");
cell.put("QQ", "772"+i+"1837"+i);
cell.put("mobilePhone", "132"+i+"1837"+i+"3"+i);
cell.put("birthday", "198"+i+"-10-"+"1"+i);
// 将该记录放入rows中
rows.add(cell);
}
// 将rows放入json对象中
jsonObj.put("rows", rows);
// 自控制台打印输出,以检验json对象生成是否正确
System.out.println("要返回的json对象:\n" + jsonObj.toString());
// 设置字符编码
resp.setCharacterEncoding("UTF-8");
// 返回json对象(通过PrintWriter输出)
resp.getWriter().print(jsonObj);
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doGet(req,resp);
}
}
最后不要忘记在你的项目web.xml文件里进行配置