$.ajax中contentType: “application/json” 的用法詳解

$.ajax({
 type: httpMethod,
 cache:false,
 async:false,
 contentType: "application/json; charset=utf-8",
 dataType: "json",//返回值類型
 url: path+url,
 data:jsonData,
 success: function(data){
 var resultData = '返回碼='+data.status+',響應結果='+data.message+',耗時='+data.tcost;
 layer.msg(resultData,{icon: 1});
 },
 error : function(xhr, ts, et) {
 layer.msg('服務調用失敗!', {icon: 2});
 }
});

$.ajax({
url: actionurl,
type: "POST",
datType: "JSON",
data: { id: nodeId },
async: false,
success: function () {}
});

$.ajax({
url: actionurl,
type: "POST",
datType: "JSON",
contentType: "application/json"
data: "{'id': " + nodeId +"}",
async: false,
success: function () {}
});