jQuery 中的 Ajax 方法(节选)
$.ajax()
基本用法:
$.ajax({ url: url, // 地址 data: data, // 参数 type: 'POST', // 提交方式 可以选择 post/get 推荐 post async: false, // 同步异步 dataType: 'json', // 返回数据类型 success:function(data){ accidentList = data.list; // 这里可以直接取 data 里面的数据了,因为设置返回值为 json 方式 } });
举个例子:
document.getElementById("search").onclick = function() { var request = new XMLHttpRequest(); request.open("GET", "server.php?number=" + document.getElementById("keyword").value); request.send(); request.onreadystatechange = function() { if (request.readyState===4) { if (request.status===200) { document.getElementById("searchResult").innerHTML = request.responseText; } else { alert("发生错误:" + request.status); } } } } document.getElementById("save").onclick = function() { var request = new XMLHttpRequest(); request.open("POST", "server.php"); var data = "name=" + document.getElementById("staffName").value + "&number=" + document.getElementById("staffNumber").value + "&sex=" + document.getElementById("staffSex").value + "&job=" + document.getElementById("staffJob").value; request.setRequestHeader("Content-type","application/x-www-form-urlencoded"); request.send(data); request.onreadystatechange = function() { if (request.readyState===4) { if (request.status===200) { document.getElementById("createResult").innerHTML = request.responseText; } else { alert("发生错误:" + request.status); } } } }
用 jQuery 改写如下:
$(document).ready(function(){ $("#search").click(function(){ $.ajax({ type: "GET", url: "http://127.0.0.1:8080/ajaxdemo/serverjson2.php?number=" + $("#keyword").val(), dataType: "json", success: function(data) { if (data.success) { $("#searchResult").html(data.msg); } else { $("#searchResult").html("出现错误:" + data.msg); } }, error: function(jqXHR){ alert("发生错误:" + jqXHR.status); }, }); }); $("#save").click(function(){ $.ajax({ type: "POST", url: "serverjson.php", data: { name: $("#staffName").val(), number: $("#staffNumber").val(), sex: $("#staffSex").val(), job: $("#staffJob").val() }, dataType: "json", success: function(data){ if (data.success) { $("#createResult").html(data.msg); } else { $("#createResult").html("出现错误:" + data.msg); } }, error: function(jqXHR){ alert("发生错误:" + jqXHR.status); }, }); }); });