$.ajax中contentType: “application/json” 的用法详解

$.ajax({
  type: httpMethod,
  cache:false,
  async:false,
  contentType: "application/json; charset=utf-8",
  dataType: "json",//返回值类型
  url: path+url,
  data:jsonData,
  success: function(data){
    var resultData = '返回码='+data.status+',响应结果='+data.message+',耗时='+data.tcost;
    layer.msg(resultData,{icon: 1});
  },
  error : function(xhr, ts, et) {
    layer.msg('服务调用失败!', {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 () {}
});