AJAX--模板代码记录

来源：互联网发布：餐厅日报表的算法编辑：程序博客网时间：2024/05/22 01:28

前台javascript写法

function checkDimension(){var startDate = document.getElementById("advInfoVo.startDate").value;var endDate = document.getElementById("advInfoVo.endDate").value;// 频道var channelId = document.getElementById("selectedChannelId");var channelIds = "";for(var i=0; i<channelId.options.length; i++){channelIds = channelIds + "," + channelId.options[i].value;}// 时间段var showtime = document.getElementsByName("advInfoVo.timeFlag");var showtimes = "";for(var i=0; i<showtime.length; i++){if(showtime[i].checked == true){showtimes = showtimes + "," + showtime[i].value;}}// 地域var areaId = document.getElementById("select2");var areaIds = "";for(var i=0; i<areaId.options.length; i++){areaIds = areaIds + "," + areaId.options[i].value;}// 频次var frequency = document.getElementById("advInfoVo.frequency");var frequencys = "";for(var i=0; i<frequency.options.length; i++){frequencys = frequency.options[i].value;}// ajax后台校验    var url = "checkDimension?channelIds=" + channelIds    + "&showtimes=" + showtimes    + "&areaIds=" + areaIds    + "&startDate=" + startDate    + "&endDate=" + endDate    + "&frequency=" + frequencys;    if (window.XMLHttpRequest) {        req = new XMLHttpRequest();    } else if (window.ActiveXObject) {        req = new ActiveXObject("Microsoft.XMLHTTP");    }    if (req) {        req.open("POST", url, true);        //指定回调函数为callback          req.onreadystatechange = dimensionCallback;        req.send(null);    }}

回调函数

//回调函数  function dimensionCallback() {  // 获取到工程路径  var localObj = window.location;  var contextPath = localObj.pathname.split("/")[1];  var basePath = localObj.protocol+"//"+localObj.host+"/"+contextPath;  if (req.readyState == 4) {      if (req.status == 200) {      var result = req.responseText.split(",");          // parseMessage(); //解析XML文档       if(result[0] == ''){      adform.submit();        } else {      document.getElementById("check_result_id").value = result[0];      document.getElementById("errorFile").href = basePath + "/downLoadFile?errorPath=" + result[1];      // 显示错误信息域      $('.whiteOverlay').show();      $("#dimensionInfo").show();      }            } else {          alert("不能得到描述信息:" + req.statusText);      }  }}

后台java代码

public void checkDimension() throws Exception {advInfoVo = new AdvInfoVo();ActionContext context = ActionContext.getContext();HttpServletRequest request = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);String channelIds = request.getParameter("channelIds");String showtimes = request.getParameter("showtimes");String areaIds = request.getParameter("areaIds");String startDate = request.getParameter("startDate");String endDate = request.getParameter("endDate");String frequency = request.getParameter("frequency");advInfoVo.setChannelId(channelIds);advInfoVo.setAreaId(areaIds);advInfoVo.setTimeFlag(showtimes);advInfoVo.setStartDate(startDate);advInfoVo.setEndDate(endDate);advInfoVo.setFrequency(frequency);// 调用维度校验方法List resultList = adService.checkAdDimension(advInfoVo);// 设置编码格式response.setContentType("text/html;charset=utf-8");// 将数据写到请求，返回前台response.getWriter().write((String) resultList.get(1) + "," + (String) resultList.get(0));}

此方法最后2行代码是主要的（主要2种方式，1.返回文本、2.返回XML）

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