最近在做項(xiàng)目交互的時候，剛開始向后臺傳遞數(shù)據(jù)返回 415 ，后來百度添加了 contentType：“application/json“ 之后返回400，然后把傳輸?shù)臄?shù)據(jù)格式改為json字符串就傳輸成功了，現(xiàn)在我們來看看 contentType：“application/json“的作用：
添加 contentType：“application/json“之后，向后臺發(fā)送數(shù)據(jù)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(fā)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(dāng)向后臺傳遞復(fù)雜json的時候，同樣需要添加 contentType：“application/json“，然后將數(shù)據(jù)轉(zhuǎn)化為字符串
var data = {
uploadarray: uploadarray,
messageInfo: {
messageTitle: messageTitle,
messageContent: messageContent,
publisher: publisher
},
userId: userId
}
$.ajax({
type: 'post',
url: "mobile/notice/addMessageInfo.jspx",
contentType: 'application/json',
data: JSON.stringify(data),
dataType: "json",
success: function(data) {
console.log(data);
},
error: function(msg) {
console.log(msg)
}
})
補(bǔ)充：下面看下$.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(jié)
以上所述是小編給大家介紹的ajax中設(shè)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(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！
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