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

https://blog.csdn.net/calyxmelo/article/details/54969244

不使用contentType: “application/json”则data可以是对象

$.ajax({
url: actionurl,type: "POST",datType: "JSON",data: { id: nodeId },async: false,success: function () {}
});
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使用contentType: “application/json”则data只能是json字符串

$.ajax({
url: actionurl,contentType: "application/json"
data: "{‘id‘: " + nodeId +"}",success: function () {}
});

//请求后端接口，获取数据function getRequestData(method,url,reqData,callBack){ $.ajax({ type : method,url : url,data : JSON.stringify(reqData),contentType:"application/json",dataType:‘json‘,success : function(result) { callBack(result); } });}