67 lines
3.3 KiB
Markdown
67 lines
3.3 KiB
Markdown
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---
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title: jQuery Ajax Post Method
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localeTitle: jQuery Ajax Post方法
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---
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## jQuery Ajax Post方法
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发送异步http POST请求以从服务器加载数据。其一般形式是：
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```javascript
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jQuery.post( url [, data ] [, success ] [, dataType ] )
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```
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* url：是唯一的必需参数。此字符串包含要将请求发送到的地址。如果未指定其他参数，则将忽略返回的数据
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* data：与请求一起发送到服务器的普通对象或字符串。
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* success：如果请求成功则执行的回调函数。它将返回的数据作为参数。它还传递了响应的文本状态。
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* dataType：服务器所需的数据类型。默认为Intelligent Guess（xml，json，script，text，html）。如果提供了此参数，则还必须提供成功回调。
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#### 例子
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```javascript
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$.post('http://example.com/form.php', {category:'client', type:'premium'});
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```
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从服务器请求`form.php` ，发送附加数据并忽略返回的结果
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```javascript
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$.post('http://example.com/form.php', {category:'client', type:'premium'}, function(response){
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alert("success");
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$("#mypar").html(response.amount);
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});
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```
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从服务器请求`form.php` ，发送附加数据并处理返回的响应（json格式）。此示例可以使用以下格式编写：
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```javascript
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$.post('http://example.com/form.php', {category:'client', type:'premium'}).done(function(response){
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alert("success");
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$("#mypar").html(response.amount);
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});
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```
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以下示例使用Ajax发布表单并将结果放入div \`\`\`html jQuery.post演示
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// Attach a submit handler to the form $( "#searchForm" ).submit(function( event ) { // Stop form from submitting normally event.preventDefault(); // Get some values from elements on the page: var $form = $( this ), term = $form.find( "input\[name='s'\]" ).val(), url = $form.attr( "action" ); // Send the data using post var posting = $.post( url, { s: term } ); // Put the results in a div posting.done(function( data ) { var content = $( data ).find( "#content" ); $( "#result" ).empty().append( content ); }); });
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```
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The following example use the github api to fetch the list of repositories of a user using jQuery.ajax() and put results in a div
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```
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HTML
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// Attach a submit handler to the form $( "#userForm" ).submit(function( event ) { // Stop form from submitting normally event.preventDefault(); // Get some values from elements on the page: var $form = $( this ), username = $form.find( "input\[name='username'\]" ).val(), url = "https://api.github.com/users/"+username+"/repos"; // Send the data using post var posting = $.post( url, { s: term } ); //Ajax Function to send a get request $.ajax({ type: "GET", url: url, dataType:"jsonp" success: function(response){ //if request if made successfully then the response represent the data $( "#result" ).empty().append( response ); } }); });
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```
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### jQuery.ajax()
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`$.post( url [, data ] [, success ] [, dataType ] )` is a shorthand Ajax function, equivalent to:
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```
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JavaScript的 $就（{ 类型：“POST”， 网址：网址 数据：数据， 成功：成功， dataType：dataType }）; \`\`\`
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`$.ajax()`提供了更多可在[此处](http://api.jquery.com/jquery.ajax/)找到的选项
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#### 更多信息：
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有关更多信息，请访问[官方网站](https://api.jquery.com/jquery.post/)
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