$.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;
     .msg(resultData,{icon: 1});
  },
  error : function(xhr, ts, et) {
     .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 () {}
});