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
var data = {
uploadarray: uploadarray, messageInfo: {
messageTitle: messageTitle, messageContent: messageContent, publisher: publisher }
, userId: userId}
$.ajax({
type: 'post', url: "mobile/notice/addMessageInfo.jspx", contentType: 'application/json', data: JSON.stringify(data), dataType: "json", success: function(data) {
console.log(data);
}
, error: function(msg) {
console.log(msg) }
}
)
补充:下面看下$.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脚本之家网站的支持!
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