How to communicate data between C and View-JS Tutorial-php.cn

How to communicate data between C and View

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Release： 2018-04-02 13:46:44

Original

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This time I will show you how to communicate data between C and View. What are the precautions for data communication between C and View? The following is a practical case, let's take a look.

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

url,[data],[callback],[type]String,Map,Function,StringV1 .0url: Send request address.

data: Key/value parameters to be sent.

callback: When the transmission is successful, the callback function .

type: Return content format, xml, html, script, json, text, _default.

Format:

$.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(&#39;,&#39;);
  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 = &#39;button&#39; id = &#39;toAddCommentId&#39; onclick = &#39;replaceFrom("+parentId+",\""+name+"\""+")&#39;>回复</button>";
  }
  appendButton = appendButton+"<button type = &#39;button&#39; onclick = &#39;replaceFrom("+parentId+","+"\""+userName+"\""+")&#39;>我也说一句</button>";
 }
 appendButton = appendButton+"<p id = &#39;commentButton&#39; ></p><p id = &#39;textareaId&#39;></p>";
 if(data==""){
  appendButton = appendButton+"<textarea id=&#39;textareaId"+parentId+"&#39; rows=&#39;2&#39; cols=&#39;77&#39; validate=&#39;required&#39; validate-message=&#39;不能为空！&#39; name = &#39;content&#39; >@"+userName+"...."+"...."+parentId+":</textarea><button type = &#39;button&#39; id = &#39;commentContentId&#39; onclick = &#39;submit("+topicId+","+parentId+","+"\""+userName+"\""+")&#39;>发表</button>";
 }
 $("#addCommentId"+parentId).html(appendButton);
 });

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Backend:

@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();
 }

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Note , use springmvc3 annotation @responseBody to pass parameters.

Frequently used js functions:

The above data is transmitted using json, and when js parses the date passed by json, it is not in the format we want. , then you need to operate on the date:

First pass the past date, set it to time and pass it to date.getTime()

Then operate in js:

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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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!