最近在做項目交互的時候,剛開始向后臺傳遞數據返回 415 ,后來百度添加了 contentType:“application/json“ 之后返回400,然后把傳輸的數據格式改為json字符串就傳輸成功了,現在我們來看看 contentType:“application/json“的作用:
添加 contentType:“application/json“之后,向后臺發送數據的格式必須為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“的時候可以向后天發送json對象形式
$.ajax({ type: "post", url: "mobile/notice/addMessageInfo.jspx", data:{name:'zhangsan',age:'15'}, dataType: "json", success: function(data) { console.log(data); }, error: function(msg) { console.log(msg) }})
另外,當向后臺傳遞復雜json的時候,同樣需要添加 contentType:“application/json“,然后將數據轉化為字符串
var data = { uploadarray: uploadarray, messageInfo: { messageTitle: messageTitle, messageContent: messageContent, publisher: publisher }, userId: userId}$.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) }})
補充:下面看下$.ajax中contentType: “application/json” 的用法
不使用contentType: “application/json”則data可以是對象
$.ajax({url: actionurl,type: "POST",datType: "JSON",data: { id: nodeId },async: false,success: function () {}});
使用contentType: “application/json”則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 () {}});
總結
以上所述是小編給大家介紹的ajax中設置contentType: "application/json"的作用,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持!
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