第二种：res.wirteHead
node部分
var http = require('http') var url = require('url') var querystring = require('querystring') var port = 9000 var jsonData = { 'name': 'xiaohong', 'job': 'daboss' } http.createServer(function (req, res) { // var pathStr = url.parse(req.url) res.writeHead(200, { 'Content-Type': 'application/json;charset=utf-8', 'Access-Control-Allow-Credentials': true, 'Access-Control-Allow-Origin': '*' }) var type = req.method; if (type == 'GET') { res.end(JSON.stringify(jsonData)) } else if (type == 'POST') { var str = ''; req.on('data',function(chunk){ str += chunk; }) req.on('end',function(){ var data = querystring.parse(str) console.log(data) if(data.name == "" || data.job == ""){ res.end(JSON.stringify({'success':true,msg:'填写有误'})) }else{ res.end(JSON.stringify({'success':false,msg:'添加成功'})) } }) } }).listen(port, function () { console.log('server is runing at port ' + port) })
重点部分是添加响应头信息
res.writeHead(200, { 'Content-Type': 'application/json;charset=utf-8', 'Access-Control-Allow-Credentials': true, 'Access-Control-Allow-Origin': '*' //可以是*，也可以是跨域的地址 })
在ajax里不需要做任何特殊处理
dataType仍旧是json
html部分
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <a href="javascript:get_jsonp()" >click me</a> <p></p> <label>姓名:</label> <input type="text" /> <label>职位：</label> <input type="text"> <a href = "javascript:add()">添加</a> <p></p> <script src="https://code.jquery.com/jquery-latest.js"></script> <script> function get_jsonp() { $.ajax({ type: 'get', dataType: 'json', url: 'http://localhost:9000', success: function (data) { $('.result').html('my name is ' + data.name) }, error: function (err) { $('.result').html('出错了 ' + err.status) } }) } function add(){ $.ajax({ type:'post', url:'http://localhost:9000', dataType:'json', data:{ 'name':$(".name").val(), 'job':$(".job").val() }, success:function(data){ $('.msg').html(data.msg) }, error:function(err){ $('.msg').html('出错了'+err.status) } }) } </script> </body> </html>