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ajax能夠發送異步請求實現無刷新效果,可是使用javascript比較麻煩,就query提供了一些封裝的方法 ,可使得操做更爲簡單:html
$.ajax()方法:java
function sendRequest() { $.ajax({ url: "Hello", type: "GET", dataType: "txt", data: "name=zhangsan", complete: function(result){ alert(result.responseText); } }); }
$.get()方法:ajax
function sendRequestByGet(){ $.get("Hello","name=lisi",function(result){ alert(result); }); }
$.post()方法:異步
function sendRequestByPost(){ $.post("Hello","name=wangwu",function(result){ alert(result); }); }
$.load()方法:post
//load代碼等效使用以下$get()方法 /* $get(url, data, function(result){ //將result數據填充到頁面元素中 $(「#h2」).html(result); }); */ function load(){ $("h2").load("Hello","name=hahaha"); }
以上異步請求的Hello文件:url
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String name=req.getParameter("name"); resp.getWriter().print(name); }