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;
    }