Fetch网络请求：get
static get=(url)=>{
return new Promise(resolve => {
fetch(url)
.then(response=>response.json())
.then(result=>{ resolve(result);
})
.catch(error=>{ reject(error); })
})
}
Post:
static post=(url,data)=>{
return new Promise(((resolve, reject) => {
fetch(url,{
method:'POST',
header:{ 'Accept':'application/json',//接受json格式的返回类型，
'Content-Type':'application/json',
body:JSON.stringify(data),
.then(response=>response.json())
.then(result=>{ resolve(result); })
.catch(error=> { reject(error); }) }) )
}
