ajax中设置contentType: "application/json"的作用
最近在做项目交互的时候,刚开始向后台传递数据返回415,后来百度添加了contentType:“application/json“之后返回400,然后把传输的数据格式改为json字符串就传输成功了,现在我们来看看contentType:“application/json“的作用:
添加contentType:“application/json“之后,向后台发送数据的格式必须为json字符串
$.ajax({ type:"post", url:"mobile/notice/addMessageInfo.jspx", contentType:"application/json", data:"{'name':'zhangsan','age':'15'}", dataType:"json", success:function(data){ console.log(data); }, error:function(msg){ console.log(msg) } })
不添加contentType:“application/json“的时候可以向后天发送json对象形式
$.ajax({ type:"post", url:"mobile/notice/addMessageInfo.jspx", data:{name:'zhangsan',age:'15'}, dataType:"json", success:function(data){ console.log(data); }, error:function(msg){ console.log(msg) } })
另外,当向后台传递复杂json的时候,同样需要添加contentType:“application/json“,然后将数据转化为字符串
vardata={ uploadarray:uploadarray, messageInfo:{ messageTitle:messageTitle, messageContent:messageContent, publisher:publisher }, userId:userId } $.ajax({ type:'post', url:"mobile/notice/addMessageInfo.jspx", contentType:'application/json', data:JSON.stringify(data), dataType:"json", success:function(data){ console.log(data); }, error:function(msg){ console.log(msg) } })
补充:下面看下$.ajax中contentType:“application/json”的用法
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(){} });
使用contentType:“application/json”则data只能是json字符串
$.ajax({ url:actionurl, type:"POST", datType:"JSON", contentType:"application/json" data:"{'id':"+nodeId+"}", async:false, success:function(){} });
总结
以上所述是小编给大家介绍的ajax中设置contentType:"application/json"的作用,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持!