struts1、ajax、jquery、json简单实例

1.页面ajax代码，使用$.ajax，获得json对象后each

$.ajax({
type:"GET",
url:ctx + "/uploadImg.do",
data:{method:'getPhoto',optCode:czydm.val()},
success:function(data){
var ary = eval(data);
$(ary).each(function(i, e){
var idI =picTotalPages();
$("#imgDiv9").append(createImgDiv(e.photopath,idI));
var fileNameList =     $("#fileList").val();
fileNameList = fileNameList + ";" + e.photopath+";CloseWindow";
$("#fileList").val(fileNameList);

//总页数重新计算
picTotalPages();
});
}}

2.后台strut1代码

　组成json格式的数据输出

json格式:

　对象 {"id":"1","name":"zhangsan"}

数组 [{"id":"1","name":"zhangsan"},{"id":"2","name":"lisi"}]

public ActionForward getPhoto(ActionMapping mapping
, ActionForm form
, HttpServletRequest request
, HttpServletResponse response) throws Exception {
String optCode = request.getParameter("optCode");
UploadImgDao dao = new UploadImgDao();
List<HashMap> rs = dao.getPhotoPathByOptCode(optCode);
String webRealRoot = PathUrlUtil.getWebRealRoot(request);

String paths = "[";
for (int i = 0; i < rs.size(); i++) {
Map data = rs.get(i);
String str = "{\"tid\":\"" + data.get("TID") + "\",\"photopath\":\"" + webRealRoot + data.get("PHOTOPATH")+ "\"}";
paths += str;
if (i < rs.size() - 1)
paths += ",";
}
paths += "]";

response.getWriter().print(paths);
return null;
}