原生JS封装ajax 传json，str，excel文件上传提交表单(推荐)

var ajaxFn = function(uri, data, cb) {
$.ajax({
url: uri,
type: 'POST',
dataType: 'json',
data: data,
})
.done(cb)
.fail(function() {
console.log("error");
})
.always(function() {
console.log("complete");
});
} 

var ajaxHdFn = function(uri, data, cb) {
var getXmlHttpRequest = function() {
if (window.XMLHttpRequest) {
//主流浏览器提供了XMLHttpRequest对象
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
//低版本的IE浏览器没有提供XMLHttpRequest对象
//所以必须使用IE浏览器的特定实现ActiveXObject
return new ActiveXObject("Microsoft.XMLHttpRequest");
}
};
var xhr = getXmlHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
//获取成功后执行操作
//数据在xhr.responseText
var resJson = JSON.parse(xhr.responseText)
cb(resJson);
}
};
xhr.open("post", uri, true);
xhr.setRequestHeader("DeviceCode", "56");
xhr.setRequestHeader("Source", "API");
xhr.setRequestHeader("Authentication", "72b32a1f754ba1c09b3695e0cb6cde7f");
xhr.setRequestHeader("Content-Type", "application/json");
var dataStr = JSON.stringify(data);
xhr.send(dataStr);
} 

var ajaxStrFn = function(uri, data, cb) {
var getXmlHttpRequest = function() {
if (window.XMLHttpRequest) {
//主流浏览器提供了XMLHttpRequest对象
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
//低版本的IE浏览器没有提供XMLHttpRequest对象
//所以必须使用IE浏览器的特定实现ActiveXObject
return new ActiveXObject("Microsoft.XMLHttpRequest");
}
};
var xhr = getXmlHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
//获取成功后执行操作
//数据在xhr.responseText
var resJson = JSON.parse(xhr.responseText)
cb(resJson);
}
};
xhr.open("post", uri, true);
xhr.setRequestHeader("DeviceCode", "56");
xhr.setRequestHeader("Source", "API");
xhr.setRequestHeader("Authentication", "72b32a1f754ba1c09b3695e0cb6cde7f");
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
var dataStr = '';
for (var i in data) {
if (dataStr) {
dataStr += '&';
}
dataStr += i + '=' + data[i];
}
xhr.send(dataStr);
} 

var ajaxFormFn = function(uri, formObj, cb) {
console.log('formObj---', formObj);
var getXmlHttpRequest = function() {
if (window.XMLHttpRequest) {
//主流浏览器提供了XMLHttpRequest对象
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
//低版本的IE浏览器没有提供XMLHttpRequest对象
//所以必须使用IE浏览器的特定实现ActiveXObject
return new ActiveXObject("Microsoft.XMLHttpRequest");
}
};
var xhr = getXmlHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
//获取成功后执行操作
//数据在xhr.responseText
var resJson = JSON.parse(xhr.responseText)
cb(resJson);
}
};
xhr.open("post", uri, true);
xhr.setRequestHeader("DeviceCode", "56");
xhr.setRequestHeader("Source", "API");
xhr.setRequestHeader("Authentication", "72b32a1f754ba1c09b3695e0cb6cde7f");
xhr.onload = function() {
console.log("上传完成!");
};
xhr.send(formObj);
}