ajax+springmvc实现C与View之间的数据交流

来源：互联网发布：vb和java的区别编辑：程序博客网时间：2024/06/05 04:35

jQuery.post(url, [data], [callback], [type])

url,[data],[callback],[type]String,Map,Function,StringV1.0url:发送请求地址。

data:待发送 Key/value 参数。

callback:发送成功时回调函数。

type:返回内容格式，xml, html, script, json, text, _default。

套用格式：

$.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);});

后台：

@RequestMapping(value = "/saveAndGetComments", params = {"topicId","parentId"}, method = RequestMethod.POST)@ResponseBodypublic 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();}

注意，用springmvc3的注解@responseBody来传递参数。

经常用到的js函数:
上面由于使用json来传递的数据，而js解析json传过来的日期时，不是我们想要的格式，这时需要对日期进行操作：
首先传过去的日期将它设为time传过去 date.getTime()
然后再在js中操作：

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;}

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