Ajax+Springmvc如何实现c与view之间的数据交流？

$.post("test.php", function(data){
 alert("Data Loaded: " + data);
 });

$.get("comment/getComments?parentId="+parentId+"&topicId="+topicId,function(data){
 var appendButton ="";
 var append = "";
 if(data!=""){
 var arr = data.split("$");
 var allTr="";
 for(var i = 0;i<arr.length;i++){
 var arr2 = arr[i].split(',');
 var name = arr2[3];
 var content = arr2[0];
 var time= "/Date("+arr2[1]+")/";
 time = DateFormat(time);
 var id = arr2[2];
 var table = "<table><tr><td>"+content+"</td></tr><tr><td>"+time+"</td></tr></table>";
 appendButton = appendButton+table+"<button type = 'button' id = 'toAddCommentId' onclick = 'replaceFrom("+parentId+",\""+name+"\""+")'>回复</button>";
 }
 appendButton = appendButton+"<button type = 'button' onclick = 'replaceFrom("+parentId+","+"\""+userName+"\""+")'>我也说一句</button>";
 }
 appendButton = appendButton+"<div id = 'commentButton' ></div><div id = 'textareaId'></div>";
 if(data==""){
 appendButton = appendButton+"<textarea id='textareaId"+parentId+"' rows='2' cols='77' validate='required' validate-message='不能为空！' name = 'content' >@"+userName+"...."+"...."+parentId+":</textarea><button type = 'button' id = 'commentContentId' onclick = 'submit("+topicId+","+parentId+","+"\""+userName+"\""+")'>发表</button>";
 }
 $("#addCommentId"+parentId).html(appendButton);
 });

@RequestMapping(value = "/saveAndGetComments", params = {"topicId","parentId"}, method = RequestMethod.POST)
 @ResponseBody
 public String saveAndGetComments(long topicId,Comment comment,long parentId) throws UnsupportedEncodingException{
 comment.setParentId(parentId);
 commentService.save(comment,topicId);
 List<Comment> comments=commentService.listByCommentId(parentId);
 return append(comments);
 }
 
 private String append(List<Comment> comments) {
 StringBuffer sb=new StringBuffer();
 for(int i=0;i<comments.size();i++){
 Comment comment = comments.get(i);
 sb.append(comment.getContent());
 sb.append(",");
 sb.append(comment.getCreateTime().getTime());
 sb.append(",");
 sb.append(comment.getId());
 sb.append(",");
 sb.append(comment.getUser().getName());
 if(i!=comments.size()-1){
 sb.append("$");
 }
 }
 return sb.toString();
 }

var date= "/Date("+time+")/";
date = DateFormat(date);



/**
 * 处理时间
 * @param value
 * @returns {String}
 */
function DateFormat(value) {
 var date = new Date(parseInt(value.replace("/Date(", "").replace(")/", ""), 10));
 var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
 var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
 var Hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
 var Minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
 var Seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();

 return date.getFullYear() + "/" + month + "/" + currentDate + " " + Hours + ":" + Minutes + ":" + Seconds;
}